shithub: tinygl

Download patch

ref: 837611268a2e7b1fe305623d6e7bce8c538adcc4
parent: f335eb384d26994f3b587bac7e573399c5a43175
author: David <gek@katherine>
date: Sat Feb 13 15:56:11 EST 2021

Added the ability to change the size of the polygon stipple mask

--- a/src/SDL_Examples/include/3dMath.h
+++ b/src/SDL_Examples/include/3dMath.h
@@ -4,7 +4,8 @@
 #include <string.h>
 typedef float f_;
 typedef unsigned int uint;
-
+#define MAX(x,y) (x>y?x:y)
+#define MIN(x,y) (x<y?x:y)
 typedef struct {f_ d[3];} vec3;
 typedef struct {int d[3];} ivec3;
 typedef struct {f_ d[4];} vec4;
@@ -60,7 +61,7 @@
 vec4 spherevsphere(vec4 s1, vec4 s2);
 vec4 boxvbox(aabb b1, aabb b2);
 vec3 closestpointAABB(aabb b, vec3 p);
-vec4 aabbvsphere(aabb box,vec4 sph);
+vec4 spherevaabb(vec4 sph,aabb box);
 
 
 #ifdef CHAD_MATH_IMPL
@@ -496,18 +497,22 @@
 //if depth of penetration is zero or lower then there is no penetration.
 vec4 spherevsphere(vec4 s1, vec4 s2){ //x,y,z,radius
 	vec4 ret;
+	vec3 diff = subv3(
+				downv4(s2),
+				downv4(s1)
+			);
+	float lv3 = lengthv3(diff);
+	float l = (s1.d[3] + s2.d[3]-lv3);
+	
+	if(l < 0 || lv3 == 0) {
+		ret.d[3] = 0;return ret;
+	}
 	ret = upv3(
-		subv3(
-			downv4(s1),
-			downv4(s2)
+		scalev3(
+			l/lv3,diff
 		)
-		,0.0
+		,l
 	);
-	ret.d[3]= -1 * sqrtf(
-		(s1.d[0]-s2.d[0])*(s1.d[0]-s2.d[0])+
-		(s1.d[1]-s2.d[1])*(s1.d[1]-s2.d[1])+
-		(s1.d[2]-s2.d[2])*(s1.d[2]-s2.d[2])
-	) + s1.d[3] + s2.d[3];
 	return ret;
 }
 vec4 boxvbox(aabb b1, aabb b2){ //Just points along the minimum separating axis, Nothing fancy.
@@ -517,46 +522,41 @@
 		.d[2]=0,
 		.d[3]=0
 	};
-	//vec3 sumextents = addv3(b1.e,b2.e);
-	vec3 b1min = subv3(downv4(b1.c),b1.e);
-	vec3 b2min = subv3(downv4(b2.c),b2.e);
-	vec3 b1max = addv3(downv4(b1.c),b1.e);
-	vec3 b2max = addv3(downv4(b2.c),b2.e);
-	vec3 axispen[2];
-	//For any overlap, these are negative.
-	//These ones point toward b2 in an intersection, so they need to be inverted.
-	axispen[0].d[0] = b1min.d[0] - b2max.d[0];
-	axispen[0].d[1] = b1min.d[1] - b2max.d[1];
-	axispen[0].d[2] = b1min.d[2] - b2max.d[2];
-	//These ones point toward b1 in an intersection. They can be left alone.
-	axispen[1].d[0] = b2min.d[0] - b1max.d[0];
-	axispen[1].d[1] = b2min.d[1] - b1max.d[1];
-	axispen[1].d[2] = b2min.d[2] - b1max.d[2];
-	//if they are not intersecting...
-	if(!(
-		(axispen[0].d[0] < 0 && axispen[1].d[0] < 0) &&
-		(axispen[0].d[1] < 0 && axispen[1].d[1] < 0) &&
-		(axispen[0].d[2] < 0 && axispen[1].d[2] < 0)
-	)){
+	vec3 sumextents = addv3(b1.e,b2.e);
+	vec3 b1c = downv4(b1.c);
+	vec3 b2c = downv4(b2.c);
+
+	vec3 b1min = subv3(b1c,b1.e);
+	vec3 b2min = subv3(b2c,b2.e);
+
+	vec3 b1max = addv3(b1c,b1.e);
+	vec3 b2max = addv3(b2c,b2.e);
+	
+	if(
+		!(
+			(fabs(b1c.d[0] - b2c.d[0]) <= sumextents.d[0]) &&
+			(fabs(b1c.d[1] - b2c.d[1]) <= sumextents.d[1]) &&
+			(fabs(b1c.d[2] - b2c.d[2]) <= sumextents.d[2])
+		)
+	){
 		return ret;
 	}
-	axispen[0] = scalev3(-1,axispen[0]); //invert these to point toward b1
-	int minimum = 0; 
-	f_ mindist = fabsf(axispen[0].d[0]);
-	for(int i = 1; i < 6;i++){
-		f_ d = fabsf(axispen[i/3].d[i%3]);
-		if(d < mindist){
-			minimum = i;
-			mindist = d;
+	vec3 axispen[2];
+	axispen[0] = subv3(b1max,b2min);
+	axispen[1] = subv3(b1min,b2max);
+	ret.d[3] = axispen[0].d[0];
+	ret.d[0] = axispen[0].d[0];
+	for(int i = 1; i < 6; i++){
+		if(fabs(axispen[i/3].d[i%3]) < fabs(ret.d[3])){
+			ret = (vec4){
+						.d[0]=0,
+						.d[1]=0,
+						.d[2]=0,
+						.d[3]=axispen[i/3].d[i%3]
+					};
+			ret.d[i%3] = ret.d[3];
 		}
 	}
-	ret = 
-	(vec4){
-		.d[0]=(minimum%3==0)?axispen[minimum/3].d[minimum%3]:0,
-		.d[1]=(minimum%3==1)?axispen[minimum/3].d[minimum%3]:0,
-		.d[2]=(minimum%3==2)?axispen[minimum/3].d[minimum%3]:0,
-		.d[3]=mindist
-	};
 	return ret;
 }
 vec3 closestpointAABB(aabb b, vec3 p){
@@ -564,7 +564,7 @@
 	vec3 b1max = addv3(downv4(b.c),b.e);
 	return clampvec3(p,b1min,b1max);
 }
-vec4 aabbvsphere(aabb box,vec4 sph){
+vec4 spherevaabb(vec4 sph, aabb box){
 	vec4 ret;
 	vec3 p = closestpointAABB(box,downv4(sph));
 	vec3 v = subv3(p,downv4(sph));
@@ -572,8 +572,20 @@
 	
 	if(d2 <= sph.d[3] * sph.d[3]){
 		f_ len = lengthv3(v);
-		ret = upv3(v,len);
-		return ret;
+		f_ diff = (sph.d[3] - len);
+		if(len > 0){
+			f_ factor = diff/len;
+			vec3 bruh = scalev3(factor, v);
+			ret = upv3(bruh, diff);
+			return ret;
+		} else {
+			aabb virt;
+			virt.c = sph;
+			virt.e.d[0] = sph.d[3];
+			virt.e.d[1] = sph.d[3];
+			virt.e.d[2] = sph.d[3];
+			return boxvbox(virt,box);
+		}
 	}
 	else
 		return (vec4){
--- /dev/null
+++ b/src/SDL_Examples/include/GLView.h
@@ -1,0 +1,72 @@
+#ifndef _glview_h_
+#define _glview_h_
+
+#define BGL_RGB           0
+#define BGL_INDEX         1
+#define BGL_SINGLE        0
+#define BGL_DOUBLE        2
+#define BGL_DIRECT        0
+#define BGL_INDIRECT      4
+#define BGL_ACCUM         8
+#define BGL_ALPHA        16
+#define BGL_DEPTH        32
+#define BGL_OVERLAY      64
+#define BGL_UNDERLAY    128
+#define BGL_STENCIL     512
+
+#include <interface/View.h>
+#include <support/Locker.h>
+#include "GL/gl.h"
+#include "GL/oscontext.h"
+#include <game/WindowScreen.h>
+#include <game/DirectWindow.h>
+
+class BGLView : public BView {
+public:
+  BGLView(BRect rect, char *name,
+          ulong resizingMode, ulong mode,
+          ulong options);
+  virtual ~BGLView();
+
+  void LockGL();
+  void UnlockGL();
+  void SwapBuffers();
+//  BView *EmbeddedView();
+//  status_t CopyPixelsOut(BPoint source, BBitmap *dest);
+//  status_t CopyPixelsIn(BBitmap *source, BPoint dest);
+
+  virtual void ErrorCallback(GLenum errorCode);
+  virtual void Draw(BRect updateRect);
+  virtual void AttachedToWindow();
+  virtual void AllAttached();
+  virtual void DetachedFromWindow();
+  virtual void AllDetached();
+  virtual void FrameResized(float width, float height);
+//  virtual status_t Perform(perform_code d, void *arg);
+
+  //
+  // Methods below are pass-throughs to BView for the moment.
+  //
+  
+  virtual status_t Archive(BMessage *data, bool deep = true) const;
+  virtual void MessageReceived(BMessage *msg);
+  virtual void SetResizingMode(uint32 mode);
+
+  virtual void Show();
+  virtual void Hide();
+
+  virtual BHandler *ResolveSpecifier(BMessage *msg, int32 index,
+							         BMessage *specifier, int32 form,
+							         const char *property);
+  virtual status_t GetSupportedSuites(BMessage *data);
+  //void DirectConnected( direct_buffer_info *info );
+  //void EnableDirectMode( bool enabled );
+
+private:
+  ostgl_context *context;
+  BBitmap *bitmaps[2];
+  int currBitmap;
+  static BLocker locker;
+};
+
+#endif // _glview_h_
--- /dev/null
+++ b/src/SDL_Examples/include/lockstepthread.h
@@ -1,0 +1,123 @@
+#ifndef LOCKSTEPTHREAD_H
+#define LOCKSTEPTHREAD_H
+#include <pthread.h>
+#include <stdio.h>
+typedef struct {
+	pthread_mutex_t myMutex;
+	pthread_barrier_t myBarrier;
+	pthread_t myThread;
+	int isThreadLive;
+	int shouldKillThread;
+	int state;
+	void (*execute)();
+} lsthread;
+void init_lsthread(lsthread* t);
+void start_lsthread(lsthread* t);
+void kill_lsthread(lsthread* t);
+void lock(lsthread* t);
+void step(lsthread* t);
+void* lsthread_func(void* me_void);
+#ifdef LOCKSTEPTHREAD_IMPL
+//function declarations
+
+void init_lsthread(lsthread* t){
+	t->myMutex = (pthread_mutex_t)PTHREAD_MUTEX_INITIALIZER;
+	pthread_barrier_init(&t->myBarrier, NULL, 2);
+	t->isThreadLive = 0;
+	t->shouldKillThread = 0;
+	t->state = 0;
+	t->execute = NULL;
+}
+void destroy_lsthread(lsthread* t){
+	pthread_mutex_destroy(&t->myMutex);
+	pthread_barrier_destroy(&t->myBarrier);
+}
+void lock(lsthread* t){
+	if(t->state == 1)return;//if already locked, nono
+	if(!t->isThreadLive)return;
+	//puts("\nLocking! <lock>");
+	pthread_barrier_wait(&t->myBarrier);
+	//puts("\nPast Wait!");
+	if(pthread_mutex_lock(&t->myMutex))
+		puts("\nError locking mutex.");
+	t->state = 1;
+	//puts("\nPast Lock </lock>");
+}
+
+void step(lsthread* t){
+	if(t->state == -1)return; //if already stepping, nono
+	if(!t->isThreadLive)return;
+	//puts("\nStepping! <step>");
+	if(pthread_mutex_unlock(&(t->myMutex)))
+		puts("\nError unlocking mutex");
+	//puts("\nDone Unlocking!");
+	pthread_barrier_wait(&t->myBarrier);
+	t->state = -1;
+	//puts("\nPast Wait </step>");
+}
+void kill_lsthread(lsthread* t){
+	if(!t->isThreadLive)return;
+	//puts("\nTime for the thread to die...");
+	if(t->state != 1){
+		lock(t);
+		//puts("\nPast lock!");
+	}
+	t->shouldKillThread = 1;
+	
+	step(t);
+	//puts("\nPast step!");
+	pthread_join(t->myThread,NULL);
+	//if(pthread_kill(t->myThread)){
+	//	puts("\nError killing thread.");
+	//}
+	t->isThreadLive = 0;
+	t->shouldKillThread = 0;
+}
+void* lsthread_func(void* me_void){
+	lsthread* me = (lsthread*) me_void;
+	int ret = 0;
+	if (!me)pthread_exit(NULL);
+	if(!me->execute)pthread_exit(NULL);
+	while (1) {
+		//ret = pthread_cond_wait(&(me->myCond), &(me->myMutex));
+		pthread_barrier_wait(&me->myBarrier);
+		//puts("\nTHREAD ACTIVATING...");
+		pthread_mutex_lock(&me->myMutex);
+		//puts("\nTHREAD ACTIVATED");
+		//if(ret)pthread_exit(NULL);
+		if (!(me->shouldKillThread) && me->execute)
+			me->execute();
+		else if(me->shouldKillThread){
+			pthread_mutex_unlock(&me->myMutex);
+			//puts("\nTHREAD DYING...");
+			//pthread_barrier_wait(&me->myBarrier);
+			//puts("\nTHREAD DED!");
+			pthread_exit(NULL);
+		}
+		//puts("\nTHREAD DEACTIVATING...");
+		pthread_mutex_unlock(&me->myMutex);
+		//puts("\nTHREAD DEACTIVATED");
+		pthread_barrier_wait(&me->myBarrier);
+		//puts("\nTIME FOR A NEW CYCLE...");
+	}
+	pthread_exit(NULL);
+}
+void start_lsthread(lsthread* t){
+	if(t->isThreadLive)return;
+	t->isThreadLive = 1;
+	t->shouldKillThread = 0;
+	if(pthread_mutex_lock(&t->myMutex))
+		puts("\nError locking mutex.");
+	t->state = 1; //LOCKED
+	pthread_create(
+		&t->myThread,
+		NULL,
+		lsthread_func,
+		(void*)t
+	);
+}
+#endif
+//end of implementation
+
+#endif
+//end of header
\ No newline at end of file
--- /dev/null
+++ b/src/SDL_Examples/include/stb_image.h
@@ -1,0 +1,8002 @@
+/* stb_image - v2.25 - public domain image loader - http://nothings.org/stb
+								  no warranty implied; use at your own risk
+
+   Do this:
+	  #define STB_IMAGE_IMPLEMENTATION
+   before you include this file in *one* C or C++ file to create the
+implementation.
+
+   // i.e. it should look like this:
+   #include ...
+   #include ...
+   #include ...
+   #define STB_IMAGE_IMPLEMENTATION
+   #include "stb_image.h"
+
+   You can #define STBI_ASSERT(x) before the #include to avoid using assert.h.
+   And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using
+malloc,realloc,free
+
+
+   QUICK NOTES:
+	  Primarily of interest to game developers and other people who can
+		  avoid problematic images and only need the trivial interface
+
+	  JPEG baseline & progressive (12 bpc/arithmetic not supported, same as
+stock IJG lib) PNG 1/2/4/8/16-bit-per-channel
+
+	  TGA (not sure what subset, if a subset)
+	  BMP non-1bpp, non-RLE
+	  PSD (composited view only, no extra channels, 8/16 bit-per-channel)
+
+	  GIF (*comp always reports as 4-channel)
+	  HDR (radiance rgbE format)
+	  PIC (Softimage PIC)
+	  PNM (PPM and PGM binary only)
+
+	  Animated GIF still needs a proper API, but here's one way to do it:
+		  http://gist.github.com/urraka/685d9a6340b26b830d49
+
+	  - decode from memory or through FILE (define STBI_NO_STDIO to remove code)
+	  - decode from arbitrary I/O callbacks
+	  - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON)
+
+   Full documentation under "DOCUMENTATION" below.
+
+
+LICENSE
+
+  See end of file for license information.
+
+RECENT REVISION HISTORY:
+
+	  2.25  (2020-02-02) fix warnings
+	  2.24  (2020-02-02) fix warnings; thread-local failure_reason and
+flip_vertically 2.23  (2019-08-11) fix clang static analysis warning 2.22
+(2019-03-04) gif fixes, fix warnings 2.21  (2019-02-25) fix typo in comment 2.20
+(2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
+	  2.19  (2018-02-11) fix warning
+	  2.18  (2018-01-30) fix warnings
+	  2.17  (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings
+	  2.16  (2017-07-23) all functions have 16-bit variants; optimizations;
+bugfixes 2.15  (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE
+detection on GCC 2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for
+Imagenet JPGs 2.13  (2016-12-04) experimental 16-bit API, only for PNG so far;
+fixes 2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes 2.11
+(2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 RGB-format JPEG; remove
+white matting in PSD; allocate large structures on the stack; correct channel
+count for PNG & BMP 2.10  (2016-01-22) avoid warning introduced in 2.09 2.09
+(2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED
+
+   See end of file for full revision history.
+
+
+ ============================    Contributors    =========================
+
+ Image formats                          Extensions, features
+	Sean Barrett (jpeg, png, bmp)          Jetro Lauha (stbi_info)
+	Nicolas Schulz (hdr, psd)              Martin "SpartanJ" Golini (stbi_info)
+	Jonathan Dummer (tga)                  James "moose2000" Brown (iPhone PNG)
+	Jean-Marc Lienher (gif)                Ben "Disch" Wenger (io callbacks)
+	Tom Seddon (pic)                       Omar Cornut (1/2/4-bit PNG)
+	Thatcher Ulrich (psd)                  Nicolas Guillemot (vertical flip)
+	Ken Miller (pgm, ppm)                  Richard Mitton (16-bit PSD)
+	github:urraka (animated gif)           Junggon Kim (PNM comments)
+	Christopher Forseth (animated gif)     Daniel Gibson (16-bit TGA)
+										   socks-the-fox (16-bit PNG)
+										   Jeremy Sawicki (handle all ImageNet
+JPGs) Optimizations & bugfixes                  Mikhail Morozov (1-bit BMP)
+	Fabian "ryg" Giesen                    Anael Seghezzi (is-16-bit query)
+	Arseny Kapoulkine
+	John-Mark Allen
+	Carmelo J Fdez-Aguera
+
+ Bug & warning fixes
+	Marc LeBlanc            David Woo          Guillaume George   Martins
+Mozeiko Christpher Lloyd        Jerry Jansson      Joseph Thomson     Phil
+Jordan Dave Moore              Roy Eltham         Hayaki Saito       Nathan Reed
+	Won Chun                Luke Graham        Johan Duparc       Nick Verigakis
+	the Horde3D community   Thomas Ruf         Ronny Chevalier    github:rlyeh
+	Janez Zemva             John Bartholomew   Michal Cichon github:romigrou
+	Jonathan Blow           Ken Hamada         Tero Hanninen      github:svdijk
+	Laurent Gomila          Cort Stratton      Sergio Gonzalez    github:snagar
+	Aruelien Pocheville     Thibault Reuille   Cass Everitt       github:Zelex
+	Ryamond Barbiero        Paul Du Bois       Engin Manap        github:grim210
+	Aldo Culquicondor       Philipp Wiesemann  Dale Weiler        github:sammyhw
+	Oriol Ferrer Mesia      Josh Tobin         Matthew Gregan     github:phprus
+	Julian Raschke          Gregory Mullen     Baldur Karlsson
+github:poppolopoppo Christian Floisand      Kevin Schmidt      JR Smith
+github:darealshinji Brad Weinberger         Matvey Cherevko
+github:Michaelangel007 Blazej Dariusz Roszkowski                  Alexander
+Veselov
+*/
+
+#ifndef STBI_INCLUDE_STB_IMAGE_H
+#define STBI_INCLUDE_STB_IMAGE_H
+
+// DOCUMENTATION
+//
+// Limitations:
+//    - no 12-bit-per-channel JPEG
+//    - no JPEGs with arithmetic coding
+//    - GIF always returns *comp=4
+//
+// Basic usage (see HDR discussion below for HDR usage):
+//    int x,y,n;
+//    unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
+//    // ... process data if not NULL ...
+//    // ... x = width, y = height, n = # 8-bit components per pixel ...
+//    // ... replace '0' with '1'..'4' to force that many components per pixel
+//    // ... but 'n' will always be the number that it would have been if you
+//    said 0 stbi_image_free(data)
+//
+// Standard parameters:
+//    int *x                 -- outputs image width in pixels
+//    int *y                 -- outputs image height in pixels
+//    int *channels_in_file  -- outputs # of image components in image file
+//    int desired_channels   -- if non-zero, # of image components requested in
+//    result
+//
+// The return value from an image loader is an 'unsigned char *' which points
+// to the pixel data, or NULL on an allocation failure or if the image is
+// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels,
+// with each pixel consisting of N interleaved 8-bit components; the first
+// pixel pointed to is top-left-most in the image. There is no padding between
+// image scanlines or between pixels, regardless of format. The number of
+// components N is 'desired_channels' if desired_channels is non-zero, or
+// *channels_in_file otherwise. If desired_channels is non-zero,
+// *channels_in_file has the number of components that _would_ have been
+// output otherwise. E.g. if you set desired_channels to 4, you will always
+// get RGBA output, but you can check *channels_in_file to see if it's trivially
+// opaque because e.g. there were only 3 channels in the source image.
+//
+// An output image with N components has the following components interleaved
+// in this order in each pixel:
+//
+//     N=#comp     components
+//       1           grey
+//       2           grey, alpha
+//       3           red, green, blue
+//       4           red, green, blue, alpha
+//
+// If image loading fails for any reason, the return value will be NULL,
+// and *x, *y, *channels_in_file will be unchanged. The function
+// stbi_failure_reason() can be queried for an extremely brief, end-user
+// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS
+// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get
+// slightly more user-friendly ones.
+//
+// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
+//
+// ===========================================================================
+//
+// UNICODE:
+//
+//   If compiling for Windows and you wish to use Unicode filenames, compile
+//   with
+//       #define STBI_WINDOWS_UTF8
+//   and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert
+//   Windows wchar_t filenames to utf8.
+//
+// ===========================================================================
+//
+// Philosophy
+//
+// stb libraries are designed with the following priorities:
+//
+//    1. easy to use
+//    2. easy to maintain
+//    3. good performance
+//
+// Sometimes I let "good performance" creep up in priority over "easy to
+// maintain", and for best performance I may provide less-easy-to-use APIs that
+// give higher performance, in addition to the easy-to-use ones. Nevertheless,
+// it's important to keep in mind that from the standpoint of you, a client of
+// this library, all you care about is #1 and #3, and stb libraries DO NOT
+// emphasize #3 above all.
+//
+// Some secondary priorities arise directly from the first two, some of which
+// provide more explicit reasons why performance can't be emphasized.
+//
+//    - Portable ("ease of use")
+//    - Small source code footprint ("easy to maintain")
+//    - No dependencies ("ease of use")
+//
+// ===========================================================================
+//
+// I/O callbacks
+//
+// I/O callbacks allow you to read from arbitrary sources, like packaged
+// files or some other source. Data read from callbacks are processed
+// through a small internal buffer (currently 128 bytes) to try to reduce
+// overhead.
+//
+// The three functions you must define are "read" (reads some bytes of data),
+// "skip" (skips some bytes of data), "eof" (reports if the stream is at the
+// end).
+//
+// ===========================================================================
+//
+// SIMD support
+//
+// The JPEG decoder will try to automatically use SIMD kernels on x86 when
+// supported by the compiler. For ARM Neon support, you must explicitly
+// request it.
+//
+// (The old do-it-yourself SIMD API is no longer supported in the current
+// code.)
+//
+// On x86, SSE2 will automatically be used when available based on a run-time
+// test; if not, the generic C versions are used as a fall-back. On ARM targets,
+// the typical path is to have separate builds for NEON and non-NEON devices
+// (at least this is true for iOS and Android). Therefore, the NEON support is
+// toggled by a build flag: define STBI_NEON to get NEON loops.
+//
+// If for some reason you do not want to use any of SIMD code, or if
+// you have issues compiling it, you can disable it entirely by
+// defining STBI_NO_SIMD.
+//
+// ===========================================================================
+//
+// HDR image support   (disable by defining STBI_NO_HDR)
+//
+// stb_image supports loading HDR images in general, and currently the Radiance
+// .HDR file format specifically. You can still load any file through the
+// existing interface; if you attempt to load an HDR file, it will be
+// automatically remapped to LDR, assuming gamma 2.2 and an arbitrary scale
+// factor defaulting to 1; both of these constants can be reconfigured through
+// this interface:
+//
+//     stbi_hdr_to_ldr_gamma(2.2f);
+//     stbi_hdr_to_ldr_scale(1.0f);
+//
+// (note, do not use _inverse_ constants; stbi_image will invert them
+// appropriately).
+//
+// Additionally, there is a new, parallel interface for loading files as
+// (linear) floats to preserve the full dynamic range:
+//
+//    float *data = stbi_loadf(filename, &x, &y, &n, 0);
+//
+// If you load LDR images through this interface, those images will
+// be promoted to floating point values, run through the inverse of
+// constants corresponding to the above:
+//
+//     stbi_ldr_to_hdr_scale(1.0f);
+//     stbi_ldr_to_hdr_gamma(2.2f);
+//
+// Finally, given a filename (or an open file or memory block--see header
+// file for details) containing image data, you can query for the "most
+// appropriate" interface to use (that is, whether the image is HDR or
+// not), using:
+//
+//     stbi_is_hdr(char *filename);
+//
+// ===========================================================================
+//
+// iPhone PNG support:
+//
+// By default we convert iphone-formatted PNGs back to RGB, even though
+// they are internally encoded differently. You can disable this conversion
+// by calling stbi_convert_iphone_png_to_rgb(0), in which case
+// you will always just get the native iphone "format" through (which
+// is BGR stored in RGB).
+//
+// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
+// pixel to remove any premultiplied alpha *only* if the image file explicitly
+// says there's premultiplied data (currently only happens in iPhone images,
+// and only if iPhone convert-to-rgb processing is on).
+//
+// ===========================================================================
+//
+// ADDITIONAL CONFIGURATION
+//
+//  - You can suppress implementation of any of the decoders to reduce
+//    your code footprint by #defining one or more of the following
+//    symbols before creating the implementation.
+//
+//        STBI_NO_JPEG
+//        STBI_NO_PNG
+//        STBI_NO_BMP
+//        STBI_NO_PSD
+//        STBI_NO_TGA
+//        STBI_NO_GIF
+//        STBI_NO_HDR
+//        STBI_NO_PIC
+//        STBI_NO_PNM   (.ppm and .pgm)
+//
+//  - You can request *only* certain decoders and suppress all other ones
+//    (this will be more forward-compatible, as addition of new decoders
+//    doesn't require you to disable them explicitly):
+//
+//        STBI_ONLY_JPEG
+//        STBI_ONLY_PNG
+//        STBI_ONLY_BMP
+//        STBI_ONLY_PSD
+//        STBI_ONLY_TGA
+//        STBI_ONLY_GIF
+//        STBI_ONLY_HDR
+//        STBI_ONLY_PIC
+//        STBI_ONLY_PNM   (.ppm and .pgm)
+//
+//   - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still
+//     want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB
+//
+
+#ifndef STBI_NO_STDIO
+#include <stdio.h>
+#endif // STBI_NO_STDIO
+
+#define STBI_VERSION 1
+
+enum {
+	STBI_default = 0, // only used for desired_channels
+
+	STBI_grey = 1,
+	STBI_grey_alpha = 2,
+	STBI_rgb = 3,
+	STBI_rgb_alpha = 4
+};
+
+#include <stdlib.h>
+typedef unsigned char stbi_uc;
+typedef unsigned short stbi_us;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef STBIDEF
+#ifdef STB_IMAGE_STATIC
+#define STBIDEF static
+#else
+#define STBIDEF extern
+#endif
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// PRIMARY API - works on images of any type
+//
+
+//
+// load image by filename, open file, or memory buffer
+//
+
+typedef struct {
+	int (*read)(void* user, char* data,
+				int size);			 // fill 'data' with 'size' bytes.  return number of
+									 // bytes actually read
+	void (*skip)(void* user, int n); // skip the next 'n' bytes, or 'unget' the
+									 // last -n bytes if negative
+	int (*eof)(void* user);			 // returns nonzero if we are at end of file/data
+} stbi_io_callbacks;
+
+////////////////////////////////////
+//
+// 8-bits-per-channel interface
+//
+
+STBIDEF stbi_uc* stbi_load_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels);
+STBIDEF stbi_uc* stbi_load_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels);
+
+#ifndef STBI_NO_STDIO
+STBIDEF stbi_uc* stbi_load(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels);
+STBIDEF stbi_uc* stbi_load_from_file(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels);
+// for stbi_load_from_file, file pointer is left pointing immediately after
+// image
+#endif
+
+#ifndef STBI_NO_GIF
+STBIDEF stbi_uc* stbi_load_gif_from_memory(stbi_uc const* buffer, int len, int** delays, int* x, int* y, int* z, int* comp, int req_comp);
+#endif
+
+#ifdef STBI_WINDOWS_UTF8
+STBIDEF int stbi_convert_wchar_to_utf8(char* buffer, size_t bufferlen, const wchar_t* input);
+#endif
+
+////////////////////////////////////
+//
+// 16-bits-per-channel interface
+//
+
+STBIDEF stbi_us* stbi_load_16_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels);
+STBIDEF stbi_us* stbi_load_16_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels);
+
+#ifndef STBI_NO_STDIO
+STBIDEF stbi_us* stbi_load_16(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels);
+STBIDEF stbi_us* stbi_load_from_file_16(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels);
+#endif
+
+////////////////////////////////////
+//
+// float-per-channel interface
+//
+#ifndef STBI_NO_LINEAR
+STBIDEF float* stbi_loadf_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels);
+STBIDEF float* stbi_loadf_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels);
+
+#ifndef STBI_NO_STDIO
+STBIDEF float* stbi_loadf(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels);
+STBIDEF float* stbi_loadf_from_file(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels);
+#endif
+#endif
+
+#ifndef STBI_NO_HDR
+STBIDEF void stbi_hdr_to_ldr_gamma(float gamma);
+STBIDEF void stbi_hdr_to_ldr_scale(float scale);
+#endif // STBI_NO_HDR
+
+#ifndef STBI_NO_LINEAR
+STBIDEF void stbi_ldr_to_hdr_gamma(float gamma);
+STBIDEF void stbi_ldr_to_hdr_scale(float scale);
+#endif // STBI_NO_LINEAR
+
+// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR
+STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const* clbk, void* user);
+STBIDEF int stbi_is_hdr_from_memory(stbi_uc const* buffer, int len);
+#ifndef STBI_NO_STDIO
+STBIDEF int stbi_is_hdr(char const* filename);
+STBIDEF int stbi_is_hdr_from_file(FILE* f);
+#endif // STBI_NO_STDIO
+
+// get a VERY brief reason for failure
+// on most compilers (and ALL modern mainstream compilers) this is threadsafe
+STBIDEF const char* stbi_failure_reason(void);
+
+// free the loaded image -- this is just free()
+STBIDEF void stbi_image_free(void* retval_from_stbi_load);
+
+// get image dimensions & components without fully decoding
+STBIDEF int stbi_info_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp);
+STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp);
+STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const* buffer, int len);
+STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const* clbk, void* user);
+
+#ifndef STBI_NO_STDIO
+STBIDEF int stbi_info(char const* filename, int* x, int* y, int* comp);
+STBIDEF int stbi_info_from_file(FILE* f, int* x, int* y, int* comp);
+STBIDEF int stbi_is_16_bit(char const* filename);
+STBIDEF int stbi_is_16_bit_from_file(FILE* f);
+#endif
+
+// for image formats that explicitly notate that they have premultiplied alpha,
+// we just return the colors as stored in the file. set this flag to force
+// unpremultiplication. results are undefined if the unpremultiply overflow.
+STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);
+
+// indicate whether we should process iphone images back to canonical format,
+// or just pass them through "as-is"
+STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);
+
+// flip the image vertically, so the first pixel in the output array is the
+// bottom left
+STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
+
+// as above, but only applies to images loaded on the thread that calls the
+// function this function is only available if your compiler supports
+// thread-local variables; calling it will fail to link if your compiler doesn't
+STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip);
+
+// ZLIB client - used by PNG, available for other purposes
+
+STBIDEF char* stbi_zlib_decode_malloc_guesssize(const char* buffer, int len, int initial_size, int* outlen);
+STBIDEF char* stbi_zlib_decode_malloc_guesssize_headerflag(const char* buffer, int len, int initial_size, int* outlen, int parse_header);
+STBIDEF char* stbi_zlib_decode_malloc(const char* buffer, int len, int* outlen);
+STBIDEF int stbi_zlib_decode_buffer(char* obuffer, int olen, const char* ibuffer, int ilen);
+
+STBIDEF char* stbi_zlib_decode_noheader_malloc(const char* buffer, int len, int* outlen);
+STBIDEF int stbi_zlib_decode_noheader_buffer(char* obuffer, int olen, const char* ibuffer, int ilen);
+
+#ifdef __cplusplus
+}
+#endif
+
+//
+//
+////   end header file   /////////////////////////////////////////////////////
+#endif // STBI_INCLUDE_STB_IMAGE_H
+
+#ifdef STB_IMAGE_IMPLEMENTATION
+
+#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) ||                         \
+	defined(STBI_ONLY_PSD) || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) || defined(STBI_ONLY_ZLIB)
+#ifndef STBI_ONLY_JPEG
+#define STBI_NO_JPEG
+#endif
+#ifndef STBI_ONLY_PNG
+#define STBI_NO_PNG
+#endif
+#ifndef STBI_ONLY_BMP
+#define STBI_NO_BMP
+#endif
+#ifndef STBI_ONLY_PSD
+#define STBI_NO_PSD
+#endif
+#ifndef STBI_ONLY_TGA
+#define STBI_NO_TGA
+#endif
+#ifndef STBI_ONLY_GIF
+#define STBI_NO_GIF
+#endif
+#ifndef STBI_ONLY_HDR
+#define STBI_NO_HDR
+#endif
+#ifndef STBI_ONLY_PIC
+#define STBI_NO_PIC
+#endif
+#ifndef STBI_ONLY_PNM
+#define STBI_NO_PNM
+#endif
+#endif
+
+#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB)
+#define STBI_NO_ZLIB
+#endif
+
+#include <limits.h>
+#include <stdarg.h>
+#include <stddef.h> // ptrdiff_t on osx
+#include <stdlib.h>
+#include <string.h>
+
+#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
+#include <math.h> // ldexp, pow
+#endif
+
+#ifndef STBI_NO_STDIO
+#include <stdio.h>
+#endif
+
+#ifndef STBI_ASSERT
+#include <assert.h>
+#define STBI_ASSERT(x) assert(x)
+#endif
+
+#ifdef __cplusplus
+#define STBI_EXTERN extern "C"
+#else
+#define STBI_EXTERN extern
+#endif
+
+#ifndef _MSC_VER
+#ifdef __cplusplus
+#define stbi_inline inline
+#else
+#define stbi_inline
+#endif
+#else
+#define stbi_inline __forceinline
+#endif
+
+#ifndef STBI_NO_THREAD_LOCALS
+#if defined(__cplusplus) && __cplusplus >= 201103L
+#define STBI_THREAD_LOCAL thread_local
+#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+#define STBI_THREAD_LOCAL _Thread_local
+#elif defined(__GNUC__)
+#define STBI_THREAD_LOCAL __thread
+#elif defined(_MSC_VER)
+#define STBI_THREAD_LOCAL __declspec(thread)
+#endif
+#endif
+
+#ifdef _MSC_VER
+typedef unsigned short stbi__uint16;
+typedef signed short stbi__int16;
+typedef unsigned int stbi__uint32;
+typedef signed int stbi__int32;
+#else
+#include <stdint.h>
+typedef uint16_t stbi__uint16;
+typedef int16_t stbi__int16;
+typedef uint32_t stbi__uint32;
+typedef int32_t stbi__int32;
+#endif
+
+// should produce compiler error if size is wrong
+typedef unsigned char validate_uint32[sizeof(stbi__uint32) == 4 ? 1 : -1];
+
+#ifdef _MSC_VER
+#define STBI_NOTUSED(v) (void)(v)
+#else
+#define STBI_NOTUSED(v) (void)sizeof(v)
+#endif
+
+#ifdef _MSC_VER
+#define STBI_HAS_LROTL
+#endif
+
+#ifdef STBI_HAS_LROTL
+#define stbi_lrot(x, y) _lrotl(x, y)
+#else
+#define stbi_lrot(x, y) (((x) << (y)) | ((x) >> (32 - (y))))
+#endif
+
+#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED))
+// ok
+#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED)
+// ok
+#else
+#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)."
+#endif
+
+#ifndef STBI_MALLOC
+#define STBI_MALLOC(sz) malloc(sz)
+#define STBI_REALLOC(p, newsz) realloc(p, newsz)
+#define STBI_FREE(p) free(p)
+#endif
+
+#ifndef STBI_REALLOC_SIZED
+#define STBI_REALLOC_SIZED(p, oldsz, newsz) STBI_REALLOC(p, newsz)
+#endif
+
+// x86/x64 detection
+#if defined(__x86_64__) || defined(_M_X64)
+#define STBI__X64_TARGET
+#elif defined(__i386) || defined(_M_IX86)
+#define STBI__X86_TARGET
+#endif
+
+#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD)
+// gcc doesn't support sse2 intrinsics unless you compile with -msse2,
+// which in turn means it gets to use SSE2 everywhere. This is unfortunate,
+// but previous attempts to provide the SSE2 functions with runtime
+// detection caused numerous issues. The way architecture extensions are
+// exposed in GCC/Clang is, sadly, not really suited for one-file libs.
+// New behavior: if compiled with -msse2, we use SSE2 without any
+// detection; if not, we don't use it at all.
+#define STBI_NO_SIMD
+#endif
+
+#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD)
+// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid
+// STBI__X64_TARGET
+//
+// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the
+// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant.
+// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not
+// simultaneously enabling "-mstackrealign".
+//
+// See https://github.com/nothings/stb/issues/81 for more information.
+//
+// So default to no SSE2 on 32-bit MinGW. If you've read this far and added
+// -mstackrealign to your build settings, feel free to #define
+// STBI_MINGW_ENABLE_SSE2.
+#define STBI_NO_SIMD
+#endif
+
+#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET))
+#define STBI_SSE2
+#include <emmintrin.h>
+
+#ifdef _MSC_VER
+
+#if _MSC_VER >= 1400 // not VC6
+#include <intrin.h>  // __cpuid
+static int stbi__cpuid3(void) {
+	int info[4];
+	__cpuid(info, 1);
+	return info[3];
+}
+#else
+static int stbi__cpuid3(void) {
+	int res;
+	__asm {
+      mov  eax,1
+      cpuid
+      mov  res,edx
+	}
+	return res;
+}
+#endif
+
+#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
+
+#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
+static int stbi__sse2_available(void) {
+	int info3 = stbi__cpuid3();
+	return ((info3 >> 26) & 1) != 0;
+}
+#endif
+
+#else // assume GCC-style if not VC++
+#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
+
+#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
+static int stbi__sse2_available(void) {
+	// If we're even attempting to compile this on GCC/Clang, that means
+	// -msse2 is on, which means the compiler is allowed to use SSE2
+	// instructions at will, and so are we.
+	return 1;
+}
+#endif
+
+#endif
+#endif
+
+// ARM NEON
+#if defined(STBI_NO_SIMD) && defined(STBI_NEON)
+#undef STBI_NEON
+#endif
+
+#ifdef STBI_NEON
+#include <arm_neon.h>
+// assume GCC or Clang on ARM targets
+#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
+#endif
+
+#ifndef STBI_SIMD_ALIGN
+#define STBI_SIMD_ALIGN(type, name) type name
+#endif
+
+///////////////////////////////////////////////
+//
+//  stbi__context struct and start_xxx functions
+
+// stbi__context structure is our basic context used by all images, so it
+// contains all the IO context, plus some basic image information
+typedef struct {
+	stbi__uint32 img_x, img_y;
+	int img_n, img_out_n;
+
+	stbi_io_callbacks io;
+	void* io_user_data;
+
+	int read_from_callbacks;
+	int buflen;
+	stbi_uc buffer_start[128];
+
+	stbi_uc *img_buffer, *img_buffer_end;
+	stbi_uc *img_buffer_original, *img_buffer_original_end;
+} stbi__context;
+
+static void stbi__refill_buffer(stbi__context* s);
+
+// initialize a memory-decode context
+static void stbi__start_mem(stbi__context* s, stbi_uc const* buffer, int len) {
+	s->io.read = NULL;
+	s->read_from_callbacks = 0;
+	s->img_buffer = s->img_buffer_original = (stbi_uc*)buffer;
+	s->img_buffer_end = s->img_buffer_original_end = (stbi_uc*)buffer + len;
+}
+
+// initialize a callback-based context
+static void stbi__start_callbacks(stbi__context* s, stbi_io_callbacks* c, void* user) {
+	s->io = *c;
+	s->io_user_data = user;
+	s->buflen = sizeof(s->buffer_start);
+	s->read_from_callbacks = 1;
+	s->img_buffer_original = s->buffer_start;
+	stbi__refill_buffer(s);
+	s->img_buffer_original_end = s->img_buffer_end;
+}
+
+#ifndef STBI_NO_STDIO
+
+static int stbi__stdio_read(void* user, char* data, int size) { return (int)fread(data, 1, size, (FILE*)user); }
+
+static void stbi__stdio_skip(void* user, int n) { fseek((FILE*)user, n, SEEK_CUR); }
+
+static int stbi__stdio_eof(void* user) { return feof((FILE*)user); }
+
+static stbi_io_callbacks stbi__stdio_callbacks = {
+	stbi__stdio_read,
+	stbi__stdio_skip,
+	stbi__stdio_eof,
+};
+
+static void stbi__start_file(stbi__context* s, FILE* f) { stbi__start_callbacks(s, &stbi__stdio_callbacks, (void*)f); }
+
+// static void stop_file(stbi__context *s) { }
+
+#endif // !STBI_NO_STDIO
+
+static void stbi__rewind(stbi__context* s) {
+	// conceptually rewind SHOULD rewind to the beginning of the stream,
+	// but we just rewind to the beginning of the initial buffer, because
+	// we only use it after doing 'test', which only ever looks at at most 92
+	// bytes
+	s->img_buffer = s->img_buffer_original;
+	s->img_buffer_end = s->img_buffer_original_end;
+}
+
+enum { STBI_ORDER_RGB, STBI_ORDER_BGR };
+
+typedef struct {
+	int bits_per_channel;
+	int num_channels;
+	int channel_order;
+} stbi__result_info;
+
+#ifndef STBI_NO_JPEG
+static int stbi__jpeg_test(stbi__context* s);
+static void* stbi__jpeg_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
+static int stbi__jpeg_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_PNG
+static int stbi__png_test(stbi__context* s);
+static void* stbi__png_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
+static int stbi__png_info(stbi__context* s, int* x, int* y, int* comp);
+static int stbi__png_is16(stbi__context* s);
+#endif
+
+#ifndef STBI_NO_BMP
+static int stbi__bmp_test(stbi__context* s);
+static void* stbi__bmp_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
+static int stbi__bmp_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_TGA
+static int stbi__tga_test(stbi__context* s);
+static void* stbi__tga_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
+static int stbi__tga_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_PSD
+static int stbi__psd_test(stbi__context* s);
+static void* stbi__psd_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc);
+static int stbi__psd_info(stbi__context* s, int* x, int* y, int* comp);
+static int stbi__psd_is16(stbi__context* s);
+#endif
+
+#ifndef STBI_NO_HDR
+static int stbi__hdr_test(stbi__context* s);
+static float* stbi__hdr_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
+static int stbi__hdr_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_PIC
+static int stbi__pic_test(stbi__context* s);
+static void* stbi__pic_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
+static int stbi__pic_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_GIF
+static int stbi__gif_test(stbi__context* s);
+static void* stbi__gif_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
+static void* stbi__load_gif_main(stbi__context* s, int** delays, int* x, int* y, int* z, int* comp, int req_comp);
+static int stbi__gif_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_PNM
+static int stbi__pnm_test(stbi__context* s);
+static void* stbi__pnm_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
+static int stbi__pnm_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+static
+#ifdef STBI_THREAD_LOCAL
+	STBI_THREAD_LOCAL
+#endif
+	const char* stbi__g_failure_reason;
+
+STBIDEF const char* stbi_failure_reason(void) { return stbi__g_failure_reason; }
+
+#ifndef STBI_NO_FAILURE_STRINGS
+static int stbi__err(const char* str) {
+	stbi__g_failure_reason = str;
+	return 0;
+}
+#endif
+
+static void* stbi__malloc(size_t size) { return STBI_MALLOC(size); }
+
+// stb_image uses ints pervasively, including for offset calculations.
+// therefore the largest decoded image size we can support with the
+// current code, even on 64-bit targets, is INT_MAX. this is not a
+// significant limitation for the intended use case.
+//
+// we do, however, need to make sure our size calculations don't
+// overflow. hence a few helper functions for size calculations that
+// multiply integers together, making sure that they're non-negative
+// and no overflow occurs.
+
+// return 1 if the sum is valid, 0 on overflow.
+// negative terms are considered invalid.
+static int stbi__addsizes_valid(int a, int b) {
+	if (b < 0)
+		return 0;
+	// now 0 <= b <= INT_MAX, hence also
+	// 0 <= INT_MAX - b <= INTMAX.
+	// And "a + b <= INT_MAX" (which might overflow) is the
+	// same as a <= INT_MAX - b (no overflow)
+	return a <= INT_MAX - b;
+}
+
+// returns 1 if the product is valid, 0 on overflow.
+// negative factors are considered invalid.
+static int stbi__mul2sizes_valid(int a, int b) {
+	if (a < 0 || b < 0)
+		return 0;
+	if (b == 0)
+		return 1; // mul-by-0 is always safe
+	// portable way to check for no overflows in a*b
+	return a <= INT_MAX / b;
+}
+
+#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
+// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow
+static int stbi__mad2sizes_valid(int a, int b, int add) { return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a * b, add); }
+#endif
+
+// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow
+static int stbi__mad3sizes_valid(int a, int b, int c, int add) {
+	return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && stbi__addsizes_valid(a * b * c, add);
+}
+
+// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't
+// overflow
+#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
+static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) {
+	return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && stbi__mul2sizes_valid(a * b * c, d) && stbi__addsizes_valid(a * b * c * d, add);
+}
+#endif
+
+#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
+// mallocs with size overflow checking
+static void* stbi__malloc_mad2(int a, int b, int add) {
+	if (!stbi__mad2sizes_valid(a, b, add))
+		return NULL;
+	return stbi__malloc(a * b + add);
+}
+#endif
+
+static void* stbi__malloc_mad3(int a, int b, int c, int add) {
+	if (!stbi__mad3sizes_valid(a, b, c, add))
+		return NULL;
+	return stbi__malloc(a * b * c + add);
+}
+
+#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
+static void* stbi__malloc_mad4(int a, int b, int c, int d, int add) {
+	if (!stbi__mad4sizes_valid(a, b, c, d, add))
+		return NULL;
+	return stbi__malloc(a * b * c * d + add);
+}
+#endif
+
+// stbi__err - error
+// stbi__errpf - error returning pointer to float
+// stbi__errpuc - error returning pointer to unsigned char
+
+#ifdef STBI_NO_FAILURE_STRINGS
+#define stbi__err(x, y) 0
+#elif defined(STBI_FAILURE_USERMSG)
+#define stbi__err(x, y) stbi__err(y)
+#else
+#define stbi__err(x, y) stbi__err(x)
+#endif
+
+#define stbi__errpf(x, y) ((float*)(size_t)(stbi__err(x, y) ? NULL : NULL))
+#define stbi__errpuc(x, y) ((unsigned char*)(size_t)(stbi__err(x, y) ? NULL : NULL))
+
+STBIDEF void stbi_image_free(void* retval_from_stbi_load) { STBI_FREE(retval_from_stbi_load); }
+
+#ifndef STBI_NO_LINEAR
+static float* stbi__ldr_to_hdr(stbi_uc* data, int x, int y, int comp);
+#endif
+
+#ifndef STBI_NO_HDR
+static stbi_uc* stbi__hdr_to_ldr(float* data, int x, int y, int comp);
+#endif
+
+static int stbi__vertically_flip_on_load_global = 0;
+
+STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) { stbi__vertically_flip_on_load_global = flag_true_if_should_flip; }
+
+#ifndef STBI_THREAD_LOCAL
+#define stbi__vertically_flip_on_load stbi__vertically_flip_on_load_global
+#else
+static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set;
+
+STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip) {
+	stbi__vertically_flip_on_load_local = flag_true_if_should_flip;
+	stbi__vertically_flip_on_load_set = 1;
+}
+
+#define stbi__vertically_flip_on_load (stbi__vertically_flip_on_load_set ? stbi__vertically_flip_on_load_local : stbi__vertically_flip_on_load_global)
+#endif // STBI_THREAD_LOCAL
+
+static void* stbi__load_main(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc) {
+	memset(ri, 0,
+		   sizeof(*ri));				// make sure it's initialized if we add new fields
+	ri->bits_per_channel = 8;			// default is 8 so most paths don't have to be changed
+	ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here
+										// so we can add BGR order
+	ri->num_channels = 0;
+
+#ifndef STBI_NO_JPEG
+	if (stbi__jpeg_test(s))
+		return stbi__jpeg_load(s, x, y, comp, req_comp, ri);
+#endif
+#ifndef STBI_NO_PNG
+	if (stbi__png_test(s))
+		return stbi__png_load(s, x, y, comp, req_comp, ri);
+#endif
+#ifndef STBI_NO_BMP
+	if (stbi__bmp_test(s))
+		return stbi__bmp_load(s, x, y, comp, req_comp, ri);
+#endif
+#ifndef STBI_NO_GIF
+	if (stbi__gif_test(s))
+		return stbi__gif_load(s, x, y, comp, req_comp, ri);
+#endif
+#ifndef STBI_NO_PSD
+	if (stbi__psd_test(s))
+		return stbi__psd_load(s, x, y, comp, req_comp, ri, bpc);
+#else
+	STBI_NOTUSED(bpc);
+#endif
+#ifndef STBI_NO_PIC
+	if (stbi__pic_test(s))
+		return stbi__pic_load(s, x, y, comp, req_comp, ri);
+#endif
+#ifndef STBI_NO_PNM
+	if (stbi__pnm_test(s))
+		return stbi__pnm_load(s, x, y, comp, req_comp, ri);
+#endif
+
+#ifndef STBI_NO_HDR
+	if (stbi__hdr_test(s)) {
+		float* hdr = stbi__hdr_load(s, x, y, comp, req_comp, ri);
+		return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
+	}
+#endif
+
+#ifndef STBI_NO_TGA
+	// test tga last because it's a crappy test!
+	if (stbi__tga_test(s))
+		return stbi__tga_load(s, x, y, comp, req_comp, ri);
+#endif
+
+	return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt");
+}
+
+static stbi_uc* stbi__convert_16_to_8(stbi__uint16* orig, int w, int h, int channels) {
+	int i;
+	int img_len = w * h * channels;
+	stbi_uc* reduced;
+
+	reduced = (stbi_uc*)stbi__malloc(img_len);
+	if (reduced == NULL)
+		return stbi__errpuc("outofmem", "Out of memory");
+
+	for (i = 0; i < img_len; ++i)
+		reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient
+													   // approx of 16->8 bit scaling
+
+	STBI_FREE(orig);
+	return reduced;
+}
+
+static stbi__uint16* stbi__convert_8_to_16(stbi_uc* orig, int w, int h, int channels) {
+	int i;
+	int img_len = w * h * channels;
+	stbi__uint16* enlarged;
+
+	enlarged = (stbi__uint16*)stbi__malloc(img_len * 2);
+	if (enlarged == NULL)
+		return (stbi__uint16*)stbi__errpuc("outofmem", "Out of memory");
+
+	for (i = 0; i < img_len; ++i)
+		enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff
+
+	STBI_FREE(orig);
+	return enlarged;
+}
+
+static void stbi__vertical_flip(void* image, int w, int h, int bytes_per_pixel) {
+	int row;
+	size_t bytes_per_row = (size_t)w * bytes_per_pixel;
+	stbi_uc temp[2048];
+	stbi_uc* bytes = (stbi_uc*)image;
+
+	for (row = 0; row < (h >> 1); row++) {
+		stbi_uc* row0 = bytes + row * bytes_per_row;
+		stbi_uc* row1 = bytes + (h - row - 1) * bytes_per_row;
+		// swap row0 with row1
+		size_t bytes_left = bytes_per_row;
+		while (bytes_left) {
+			size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp);
+			memcpy(temp, row0, bytes_copy);
+			memcpy(row0, row1, bytes_copy);
+			memcpy(row1, temp, bytes_copy);
+			row0 += bytes_copy;
+			row1 += bytes_copy;
+			bytes_left -= bytes_copy;
+		}
+	}
+}
+
+#ifndef STBI_NO_GIF
+static void stbi__vertical_flip_slices(void* image, int w, int h, int z, int bytes_per_pixel) {
+	int slice;
+	int slice_size = w * h * bytes_per_pixel;
+
+	stbi_uc* bytes = (stbi_uc*)image;
+	for (slice = 0; slice < z; ++slice) {
+		stbi__vertical_flip(bytes, w, h, bytes_per_pixel);
+		bytes += slice_size;
+	}
+}
+#endif
+
+static unsigned char* stbi__load_and_postprocess_8bit(stbi__context* s, int* x, int* y, int* comp, int req_comp) {
+	stbi__result_info ri;
+	void* result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8);
+
+	if (result == NULL)
+		return NULL;
+
+	if (ri.bits_per_channel != 8) {
+		STBI_ASSERT(ri.bits_per_channel == 16);
+		result = stbi__convert_16_to_8((stbi__uint16*)result, *x, *y, req_comp == 0 ? *comp : req_comp);
+		ri.bits_per_channel = 8;
+	}
+
+	// @TODO: move stbi__convert_format to here
+
+	if (stbi__vertically_flip_on_load) {
+		int channels = req_comp ? req_comp : *comp;
+		stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc));
+	}
+
+	return (unsigned char*)result;
+}
+
+static stbi__uint16* stbi__load_and_postprocess_16bit(stbi__context* s, int* x, int* y, int* comp, int req_comp) {
+	stbi__result_info ri;
+	void* result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16);
+
+	if (result == NULL)
+		return NULL;
+
+	if (ri.bits_per_channel != 16) {
+		STBI_ASSERT(ri.bits_per_channel == 8);
+		result = stbi__convert_8_to_16((stbi_uc*)result, *x, *y, req_comp == 0 ? *comp : req_comp);
+		ri.bits_per_channel = 16;
+	}
+
+	// @TODO: move stbi__convert_format16 to here
+	// @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to
+	// keep more precision
+
+	if (stbi__vertically_flip_on_load) {
+		int channels = req_comp ? req_comp : *comp;
+		stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16));
+	}
+
+	return (stbi__uint16*)result;
+}
+
+#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR)
+static void stbi__float_postprocess(float* result, int* x, int* y, int* comp, int req_comp) {
+	if (stbi__vertically_flip_on_load && result != NULL) {
+		int channels = req_comp ? req_comp : *comp;
+		stbi__vertical_flip(result, *x, *y, channels * sizeof(float));
+	}
+}
+#endif
+
+#ifndef STBI_NO_STDIO
+
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char* str, int cbmb, wchar_t* widestr,
+																	int cchwide);
+STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t* widestr, int cchwide, char* str,
+																	int cbmb, const char* defchar, int* used_default);
+#endif
+
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+STBIDEF int stbi_convert_wchar_to_utf8(char* buffer, size_t bufferlen, const wchar_t* input) {
+	return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int)bufferlen, NULL, NULL);
+}
+#endif
+
+static FILE* stbi__fopen(char const* filename, char const* mode) {
+	FILE* f;
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+	wchar_t wMode[64];
+	wchar_t wFilename[1024];
+	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)))
+		return 0;
+
+	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)))
+		return 0;
+
+#if _MSC_VER >= 1400
+	if (0 != _wfopen_s(&f, wFilename, wMode))
+		f = 0;
+#else
+	f = _wfopen(wFilename, wMode);
+#endif
+
+#elif defined(_MSC_VER) && _MSC_VER >= 1400
+	if (0 != fopen_s(&f, filename, mode))
+		f = 0;
+#else
+	f = fopen(filename, mode);
+#endif
+	return f;
+}
+
+STBIDEF stbi_uc* stbi_load(char const* filename, int* x, int* y, int* comp, int req_comp) {
+	FILE* f = stbi__fopen(filename, "rb");
+	unsigned char* result;
+	if (!f)
+		return stbi__errpuc("can't fopen", "Unable to open file");
+	result = stbi_load_from_file(f, x, y, comp, req_comp);
+	fclose(f);
+	return result;
+}
+
+STBIDEF stbi_uc* stbi_load_from_file(FILE* f, int* x, int* y, int* comp, int req_comp) {
+	unsigned char* result;
+	stbi__context s;
+	stbi__start_file(&s, f);
+	result = stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp);
+	if (result) {
+		// need to 'unget' all the characters in the IO buffer
+		fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR);
+	}
+	return result;
+}
+
+STBIDEF stbi__uint16* stbi_load_from_file_16(FILE* f, int* x, int* y, int* comp, int req_comp) {
+	stbi__uint16* result;
+	stbi__context s;
+	stbi__start_file(&s, f);
+	result = stbi__load_and_postprocess_16bit(&s, x, y, comp, req_comp);
+	if (result) {
+		// need to 'unget' all the characters in the IO buffer
+		fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR);
+	}
+	return result;
+}
+
+STBIDEF stbi_us* stbi_load_16(char const* filename, int* x, int* y, int* comp, int req_comp) {
+	FILE* f = stbi__fopen(filename, "rb");
+	stbi__uint16* result;
+	if (!f)
+		return (stbi_us*)stbi__errpuc("can't fopen", "Unable to open file");
+	result = stbi_load_from_file_16(f, x, y, comp, req_comp);
+	fclose(f);
+	return result;
+}
+
+#endif //! STBI_NO_STDIO
+
+STBIDEF stbi_us* stbi_load_16_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels) {
+	stbi__context s;
+	stbi__start_mem(&s, buffer, len);
+	return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels);
+}
+
+STBIDEF stbi_us* stbi_load_16_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels) {
+	stbi__context s;
+	stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
+	return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels);
+}
+
+STBIDEF stbi_uc* stbi_load_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp, int req_comp) {
+	stbi__context s;
+	stbi__start_mem(&s, buffer, len);
+	return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp);
+}
+
+STBIDEF stbi_uc* stbi_load_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp, int req_comp) {
+	stbi__context s;
+	stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
+	return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp);
+}
+
+#ifndef STBI_NO_GIF
+STBIDEF stbi_uc* stbi_load_gif_from_memory(stbi_uc const* buffer, int len, int** delays, int* x, int* y, int* z, int* comp, int req_comp) {
+	unsigned char* result;
+	stbi__context s;
+	stbi__start_mem(&s, buffer, len);
+
+	result = (unsigned char*)stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp);
+	if (stbi__vertically_flip_on_load) {
+		stbi__vertical_flip_slices(result, *x, *y, *z, *comp);
+	}
+
+	return result;
+}
+#endif
+
+#ifndef STBI_NO_LINEAR
+static float* stbi__loadf_main(stbi__context* s, int* x, int* y, int* comp, int req_comp) {
+	unsigned char* data;
+#ifndef STBI_NO_HDR
+	if (stbi__hdr_test(s)) {
+		stbi__result_info ri;
+		float* hdr_data = stbi__hdr_load(s, x, y, comp, req_comp, &ri);
+		if (hdr_data)
+			stbi__float_postprocess(hdr_data, x, y, comp, req_comp);
+		return hdr_data;
+	}
+#endif
+	data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp);
+	if (data)
+		return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
+	return stbi__errpf("unknown image type", "Image not of any known type, or corrupt");
+}
+
+STBIDEF float* stbi_loadf_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp, int req_comp) {
+	stbi__context s;
+	stbi__start_mem(&s, buffer, len);
+	return stbi__loadf_main(&s, x, y, comp, req_comp);
+}
+
+STBIDEF float* stbi_loadf_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp, int req_comp) {
+	stbi__context s;
+	stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
+	return stbi__loadf_main(&s, x, y, comp, req_comp);
+}
+
+#ifndef STBI_NO_STDIO
+STBIDEF float* stbi_loadf(char const* filename, int* x, int* y, int* comp, int req_comp) {
+	float* result;
+	FILE* f = stbi__fopen(filename, "rb");
+	if (!f)
+		return stbi__errpf("can't fopen", "Unable to open file");
+	result = stbi_loadf_from_file(f, x, y, comp, req_comp);
+	fclose(f);
+	return result;
+}
+
+STBIDEF float* stbi_loadf_from_file(FILE* f, int* x, int* y, int* comp, int req_comp) {
+	stbi__context s;
+	stbi__start_file(&s, f);
+	return stbi__loadf_main(&s, x, y, comp, req_comp);
+}
+#endif // !STBI_NO_STDIO
+
+#endif // !STBI_NO_LINEAR
+
+// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is
+// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always
+// reports false!
+
+STBIDEF int stbi_is_hdr_from_memory(stbi_uc const* buffer, int len) {
+#ifndef STBI_NO_HDR
+	stbi__context s;
+	stbi__start_mem(&s, buffer, len);
+	return stbi__hdr_test(&s);
+#else
+	STBI_NOTUSED(buffer);
+	STBI_NOTUSED(len);
+	return 0;
+#endif
+}
+
+#ifndef STBI_NO_STDIO
+STBIDEF int stbi_is_hdr(char const* filename) {
+	FILE* f = stbi__fopen(filename, "rb");
+	int result = 0;
+	if (f) {
+		result = stbi_is_hdr_from_file(f);
+		fclose(f);
+	}
+	return result;
+}
+
+STBIDEF int stbi_is_hdr_from_file(FILE* f) {
+#ifndef STBI_NO_HDR
+	long pos = ftell(f);
+	int res;
+	stbi__context s;
+	stbi__start_file(&s, f);
+	res = stbi__hdr_test(&s);
+	fseek(f, pos, SEEK_SET);
+	return res;
+#else
+	STBI_NOTUSED(f);
+	return 0;
+#endif
+}
+#endif // !STBI_NO_STDIO
+
+STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const* clbk, void* user) {
+#ifndef STBI_NO_HDR
+	stbi__context s;
+	stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
+	return stbi__hdr_test(&s);
+#else
+	STBI_NOTUSED(clbk);
+	STBI_NOTUSED(user);
+	return 0;
+#endif
+}
+
+#ifndef STBI_NO_LINEAR
+static float stbi__l2h_gamma = 2.2f, stbi__l2h_scale = 1.0f;
+
+STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
+STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
+#endif
+
+static float stbi__h2l_gamma_i = 1.0f / 2.2f, stbi__h2l_scale_i = 1.0f;
+
+STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1 / gamma; }
+STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1 / scale; }
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// Common code used by all image loaders
+//
+
+enum { STBI__SCAN_load = 0, STBI__SCAN_type, STBI__SCAN_header };
+
+static void stbi__refill_buffer(stbi__context* s) {
+	int n = (s->io.read)(s->io_user_data, (char*)s->buffer_start, s->buflen);
+	if (n == 0) {
+		// at end of file, treat same as if from memory, but need to handle case
+		// where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file
+		s->read_from_callbacks = 0;
+		s->img_buffer = s->buffer_start;
+		s->img_buffer_end = s->buffer_start + 1;
+		*s->img_buffer = 0;
+	} else {
+		s->img_buffer = s->buffer_start;
+		s->img_buffer_end = s->buffer_start + n;
+	}
+}
+
+stbi_inline static stbi_uc stbi__get8(stbi__context* s) {
+	if (s->img_buffer < s->img_buffer_end)
+		return *s->img_buffer++;
+	if (s->read_from_callbacks) {
+		stbi__refill_buffer(s);
+		return *s->img_buffer++;
+	}
+	return 0;
+}
+
+#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
+// nothing
+#else
+stbi_inline static int stbi__at_eof(stbi__context* s) {
+	if (s->io.read) {
+		if (!(s->io.eof)(s->io_user_data))
+			return 0;
+		// if feof() is true, check if buffer = end
+		// special case: we've only got the special 0 character at the end
+		if (s->read_from_callbacks == 0)
+			return 1;
+	}
+
+	return s->img_buffer >= s->img_buffer_end;
+}
+#endif
+
+#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) &&           \
+	defined(STBI_NO_PIC)
+// nothing
+#else
+static void stbi__skip(stbi__context* s, int n) {
+	if (n < 0) {
+		s->img_buffer = s->img_buffer_end;
+		return;
+	}
+	if (s->io.read) {
+		int blen = (int)(s->img_buffer_end - s->img_buffer);
+		if (blen < n) {
+			s->img_buffer = s->img_buffer_end;
+			(s->io.skip)(s->io_user_data, n - blen);
+			return;
+		}
+	}
+	s->img_buffer += n;
+}
+#endif
+
+#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM)
+// nothing
+#else
+static int stbi__getn(stbi__context* s, stbi_uc* buffer, int n) {
+	if (s->io.read) {
+		int blen = (int)(s->img_buffer_end - s->img_buffer);
+		if (blen < n) {
+			int res, count;
+
+			memcpy(buffer, s->img_buffer, blen);
+
+			count = (s->io.read)(s->io_user_data, (char*)buffer + blen, n - blen);
+			res = (count == (n - blen));
+			s->img_buffer = s->img_buffer_end;
+			return res;
+		}
+	}
+
+	if (s->img_buffer + n <= s->img_buffer_end) {
+		memcpy(buffer, s->img_buffer, n);
+		s->img_buffer += n;
+		return 1;
+	} else
+		return 0;
+}
+#endif
+
+#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
+// nothing
+#else
+static int stbi__get16be(stbi__context* s) {
+	int z = stbi__get8(s);
+	return (z << 8) + stbi__get8(s);
+}
+#endif
+
+#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
+// nothing
+#else
+static stbi__uint32 stbi__get32be(stbi__context* s) {
+	stbi__uint32 z = stbi__get16be(s);
+	return (z << 16) + stbi__get16be(s);
+}
+#endif
+
+#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF)
+// nothing
+#else
+static int stbi__get16le(stbi__context* s) {
+	int z = stbi__get8(s);
+	return z + (stbi__get8(s) << 8);
+}
+#endif
+
+#ifndef STBI_NO_BMP
+static stbi__uint32 stbi__get32le(stbi__context* s) {
+	stbi__uint32 z = stbi__get16le(s);
+	return z + (stbi__get16le(s) << 16);
+}
+#endif
+
+#define STBI__BYTECAST(x) ((stbi_uc)((x)&255)) // truncate int to byte without warnings
+
+#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) &&           \
+	defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
+// nothing
+#else
+//////////////////////////////////////////////////////////////////////////////
+//
+//  generic converter from built-in img_n to req_comp
+//    individual types do this automatically as much as possible (e.g. jpeg
+//    does all cases internally since it needs to colorspace convert anyway,
+//    and it never has alpha, so very few cases ). png can automatically
+//    interleave an alpha=255 channel, but falls back to this for other cases
+//
+//  assume data buffer is malloced, so malloc a new one and free that one
+//  only failure mode is malloc failing
+
+static stbi_uc stbi__compute_y(int r, int g, int b) { return (stbi_uc)(((r * 77) + (g * 150) + (29 * b)) >> 8); }
+#endif
+
+#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) &&            \
+	defined(STBI_NO_PNM)
+// nothing
+#else
+static unsigned char* stbi__convert_format(unsigned char* data, int img_n, int req_comp, unsigned int x, unsigned int y) {
+	int i, j;
+	unsigned char* good;
+
+	if (req_comp == img_n)
+		return data;
+	STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
+
+	good = (unsigned char*)stbi__malloc_mad3(req_comp, x, y, 0);
+	if (good == NULL) {
+		STBI_FREE(data);
+		return stbi__errpuc("outofmem", "Out of memory");
+	}
+
+	for (j = 0; j < (int)y; ++j) {
+		unsigned char* src = data + j * x * img_n;
+		unsigned char* dest = good + j * x * req_comp;
+
+#define STBI__COMBO(a, b) ((a)*8 + (b))
+#define STBI__CASE(a, b)                                                                                                                                       \
+	case STBI__COMBO(a, b):                                                                                                                                    \
+		for (i = x - 1; i >= 0; --i, src += a, dest += b)
+		// convert source image with img_n components to one with req_comp
+		// components; avoid switch per pixel, so use switch per scanline and
+		// massive macros
+		switch (STBI__COMBO(img_n, req_comp)) {
+			STBI__CASE(1, 2) {
+				dest[0] = src[0];
+				dest[1] = 255;
+			}
+			break;
+			STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
+			break;
+			STBI__CASE(1, 4) {
+				dest[0] = dest[1] = dest[2] = src[0];
+				dest[3] = 255;
+			}
+			break;
+			STBI__CASE(2, 1) { dest[0] = src[0]; }
+			break;
+			STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
+			break;
+			STBI__CASE(2, 4) {
+				dest[0] = dest[1] = dest[2] = src[0];
+				dest[3] = src[1];
+			}
+			break;
+			STBI__CASE(3, 4) {
+				dest[0] = src[0];
+				dest[1] = src[1];
+				dest[2] = src[2];
+				dest[3] = 255;
+			}
+			break;
+			STBI__CASE(3, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); }
+			break;
+			STBI__CASE(3, 2) {
+				dest[0] = stbi__compute_y(src[0], src[1], src[2]);
+				dest[1] = 255;
+			}
+			break;
+			STBI__CASE(4, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); }
+			break;
+			STBI__CASE(4, 2) {
+				dest[0] = stbi__compute_y(src[0], src[1], src[2]);
+				dest[1] = src[3];
+			}
+			break;
+			STBI__CASE(4, 3) {
+				dest[0] = src[0];
+				dest[1] = src[1];
+				dest[2] = src[2];
+			}
+			break;
+		default:
+			STBI_ASSERT(0);
+		}
+#undef STBI__CASE
+	}
+
+	STBI_FREE(data);
+	return good;
+}
+#endif
+
+#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
+// nothing
+#else
+static stbi__uint16 stbi__compute_y_16(int r, int g, int b) { return (stbi__uint16)(((r * 77) + (g * 150) + (29 * b)) >> 8); }
+#endif
+
+#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
+// nothing
+#else
+static stbi__uint16* stbi__convert_format16(stbi__uint16* data, int img_n, int req_comp, unsigned int x, unsigned int y) {
+	int i, j;
+	stbi__uint16* good;
+
+	if (req_comp == img_n)
+		return data;
+	STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
+
+	good = (stbi__uint16*)stbi__malloc(req_comp * x * y * 2);
+	if (good == NULL) {
+		STBI_FREE(data);
+		return (stbi__uint16*)stbi__errpuc("outofmem", "Out of memory");
+	}
+
+	for (j = 0; j < (int)y; ++j) {
+		stbi__uint16* src = data + j * x * img_n;
+		stbi__uint16* dest = good + j * x * req_comp;
+
+#define STBI__COMBO(a, b) ((a)*8 + (b))
+#define STBI__CASE(a, b)                                                                                                                                       \
+	case STBI__COMBO(a, b):                                                                                                                                    \
+		for (i = x - 1; i >= 0; --i, src += a, dest += b)
+		// convert source image with img_n components to one with req_comp
+		// components; avoid switch per pixel, so use switch per scanline and
+		// massive macros
+		switch (STBI__COMBO(img_n, req_comp)) {
+			STBI__CASE(1, 2) {
+				dest[0] = src[0];
+				dest[1] = 0xffff;
+			}
+			break;
+			STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
+			break;
+			STBI__CASE(1, 4) {
+				dest[0] = dest[1] = dest[2] = src[0];
+				dest[3] = 0xffff;
+			}
+			break;
+			STBI__CASE(2, 1) { dest[0] = src[0]; }
+			break;
+			STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
+			break;
+			STBI__CASE(2, 4) {
+				dest[0] = dest[1] = dest[2] = src[0];
+				dest[3] = src[1];
+			}
+			break;
+			STBI__CASE(3, 4) {
+				dest[0] = src[0];
+				dest[1] = src[1];
+				dest[2] = src[2];
+				dest[3] = 0xffff;
+			}
+			break;
+			STBI__CASE(3, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); }
+			break;
+			STBI__CASE(3, 2) {
+				dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
+				dest[1] = 0xffff;
+			}
+			break;
+			STBI__CASE(4, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); }
+			break;
+			STBI__CASE(4, 2) {
+				dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
+				dest[1] = src[3];
+			}
+			break;
+			STBI__CASE(4, 3) {
+				dest[0] = src[0];
+				dest[1] = src[1];
+				dest[2] = src[2];
+			}
+			break;
+		default:
+			STBI_ASSERT(0);
+		}
+#undef STBI__CASE
+	}
+
+	STBI_FREE(data);
+	return good;
+}
+#endif
+
+#ifndef STBI_NO_LINEAR
+static float* stbi__ldr_to_hdr(stbi_uc* data, int x, int y, int comp) {
+	int i, k, n;
+	float* output;
+	if (!data)
+		return NULL;
+	output = (float*)stbi__malloc_mad4(x, y, comp, sizeof(float), 0);
+	if (output == NULL) {
+		STBI_FREE(data);
+		return stbi__errpf("outofmem", "Out of memory");
+	}
+	// compute number of non-alpha components
+	if (comp & 1)
+		n = comp;
+	else
+		n = comp - 1;
+	for (i = 0; i < x * y; ++i) {
+		for (k = 0; k < n; ++k) {
+			output[i * comp + k] = (float)(pow(data[i * comp + k] / 255.0f, stbi__l2h_gamma) * stbi__l2h_scale);
+		}
+	}
+	if (n < comp) {
+		for (i = 0; i < x * y; ++i) {
+			output[i * comp + n] = data[i * comp + n] / 255.0f;
+		}
+	}
+	STBI_FREE(data);
+	return output;
+}
+#endif
+
+#ifndef STBI_NO_HDR
+#define stbi__float2int(x) ((int)(x))
+static stbi_uc* stbi__hdr_to_ldr(float* data, int x, int y, int comp) {
+	int i, k, n;
+	stbi_uc* output;
+	if (!data)
+		return NULL;
+	output = (stbi_uc*)stbi__malloc_mad3(x, y, comp, 0);
+	if (output == NULL) {
+		STBI_FREE(data);
+		return stbi__errpuc("outofmem", "Out of memory");
+	}
+	// compute number of non-alpha components
+	if (comp & 1)
+		n = comp;
+	else
+		n = comp - 1;
+	for (i = 0; i < x * y; ++i) {
+		for (k = 0; k < n; ++k) {
+			float z = (float)pow(data[i * comp + k] * stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f;
+			if (z < 0)
+				z = 0;
+			if (z > 255)
+				z = 255;
+			output[i * comp + k] = (stbi_uc)stbi__float2int(z);
+		}
+		if (k < comp) {
+			float z = data[i * comp + k] * 255 + 0.5f;
+			if (z < 0)
+				z = 0;
+			if (z > 255)
+				z = 255;
+			output[i * comp + k] = (stbi_uc)stbi__float2int(z);
+		}
+	}
+	STBI_FREE(data);
+	return output;
+}
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+//
+//  "baseline" JPEG/JFIF decoder
+//
+//    simple implementation
+//      - doesn't support delayed output of y-dimension
+//      - simple interface (only one output format: 8-bit interleaved RGB)
+//      - doesn't try to recover corrupt jpegs
+//      - doesn't allow partial loading, loading multiple at once
+//      - still fast on x86 (copying globals into locals doesn't help x86)
+//      - allocates lots of intermediate memory (full size of all components)
+//        - non-interleaved case requires this anyway
+//        - allows good upsampling (see next)
+//    high-quality
+//      - upsampled channels are bilinearly interpolated, even across blocks
+//      - quality integer IDCT derived from IJG's 'slow'
+//    performance
+//      - fast huffman; reasonable integer IDCT
+//      - some SIMD kernels for common paths on targets with SSE2/NEON
+//      - uses a lot of intermediate memory, could cache poorly
+
+#ifndef STBI_NO_JPEG
+
+// huffman decoding acceleration
+#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache
+
+typedef struct {
+	stbi_uc fast[1 << FAST_BITS];
+	// weirdly, repacking this into AoS is a 10% speed loss, instead of a win
+	stbi__uint16 code[256];
+	stbi_uc values[256];
+	stbi_uc size[257];
+	unsigned int maxcode[18];
+	int delta[17]; // old 'firstsymbol' - old 'firstcode'
+} stbi__huffman;
+
+typedef struct {
+	stbi__context* s;
+	stbi__huffman huff_dc[4];
+	stbi__huffman huff_ac[4];
+	stbi__uint16 dequant[4][64];
+	stbi__int16 fast_ac[4][1 << FAST_BITS];
+
+	// sizes for components, interleaved MCUs
+	int img_h_max, img_v_max;
+	int img_mcu_x, img_mcu_y;
+	int img_mcu_w, img_mcu_h;
+
+	// definition of jpeg image component
+	struct {
+		int id;
+		int h, v;
+		int tq;
+		int hd, ha;
+		int dc_pred;
+
+		int x, y, w2, h2;
+		stbi_uc* data;
+		void *raw_data, *raw_coeff;
+		stbi_uc* linebuf;
+		short* coeff;		  // progressive only
+		int coeff_w, coeff_h; // number of 8x8 coefficient blocks
+	} img_comp[4];
+
+	stbi__uint32 code_buffer; // jpeg entropy-coded buffer
+	int code_bits;			  // number of valid bits
+	unsigned char marker;	 // marker seen while filling entropy buffer
+	int nomore;				  // flag if we saw a marker so must stop
+
+	int progressive;
+	int spec_start;
+	int spec_end;
+	int succ_high;
+	int succ_low;
+	int eob_run;
+	int jfif;
+	int app14_color_transform; // Adobe APP14 tag
+	int rgb;
+
+	int scan_n, order[4];
+	int restart_interval, todo;
+
+	// kernels
+	void (*idct_block_kernel)(stbi_uc* out, int out_stride, short data[64]);
+	void (*YCbCr_to_RGB_kernel)(stbi_uc* out, const stbi_uc* y, const stbi_uc* pcb, const stbi_uc* pcr, int count, int step);
+	stbi_uc* (*resample_row_hv_2_kernel)(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs);
+} stbi__jpeg;
+
+static int stbi__build_huffman(stbi__huffman* h, int* count) {
+	int i, j, k = 0;
+	unsigned int code;
+	// build size list for each symbol (from JPEG spec)
+	for (i = 0; i < 16; ++i)
+		for (j = 0; j < count[i]; ++j)
+			h->size[k++] = (stbi_uc)(i + 1);
+	h->size[k] = 0;
+
+	// compute actual symbols (from jpeg spec)
+	code = 0;
+	k = 0;
+	for (j = 1; j <= 16; ++j) {
+		// compute delta to add to code to compute symbol id
+		h->delta[j] = k - code;
+		if (h->size[k] == j) {
+			while (h->size[k] == j)
+				h->code[k++] = (stbi__uint16)(code++);
+			if (code - 1 >= (1u << j))
+				return stbi__err("bad code lengths", "Corrupt JPEG");
+		}
+		// compute largest code + 1 for this size, preshifted as needed later
+		h->maxcode[j] = code << (16 - j);
+		code <<= 1;
+	}
+	h->maxcode[j] = 0xffffffff;
+
+	// build non-spec acceleration table; 255 is flag for not-accelerated
+	memset(h->fast, 255, 1 << FAST_BITS);
+	for (i = 0; i < k; ++i) {
+		int s = h->size[i];
+		if (s <= FAST_BITS) {
+			int c = h->code[i] << (FAST_BITS - s);
+			int m = 1 << (FAST_BITS - s);
+			for (j = 0; j < m; ++j) {
+				h->fast[c + j] = (stbi_uc)i;
+			}
+		}
+	}
+	return 1;
+}
+
+// build a table that decodes both magnitude and value of small ACs in
+// one go.
+static void stbi__build_fast_ac(stbi__int16* fast_ac, stbi__huffman* h) {
+	int i;
+	for (i = 0; i < (1 << FAST_BITS); ++i) {
+		stbi_uc fast = h->fast[i];
+		fast_ac[i] = 0;
+		if (fast < 255) {
+			int rs = h->values[fast];
+			int run = (rs >> 4) & 15;
+			int magbits = rs & 15;
+			int len = h->size[fast];
+
+			if (magbits && len + magbits <= FAST_BITS) {
+				// magnitude code followed by receive_extend code
+				int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits);
+				int m = 1 << (magbits - 1);
+				if (k < m)
+					k += (~0U << magbits) + 1;
+				// if the result is small enough, we can fit it in fast_ac table
+				if (k >= -128 && k <= 127)
+					fast_ac[i] = (stbi__int16)((k * 256) + (run * 16) + (len + magbits));
+			}
+		}
+	}
+}
+
+static void stbi__grow_buffer_unsafe(stbi__jpeg* j) {
+	do {
+		unsigned int b = j->nomore ? 0 : stbi__get8(j->s);
+		if (b == 0xff) {
+			int c = stbi__get8(j->s);
+			while (c == 0xff)
+				c = stbi__get8(j->s); // consume fill bytes
+			if (c != 0) {
+				j->marker = (unsigned char)c;
+				j->nomore = 1;
+				return;
+			}
+		}
+		j->code_buffer |= b << (24 - j->code_bits);
+		j->code_bits += 8;
+	} while (j->code_bits <= 24);
+}
+
+// (1 << n) - 1
+static const stbi__uint32 stbi__bmask[17] = {0, 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535};
+
+// decode a jpeg huffman value from the bitstream
+stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg* j, stbi__huffman* h) {
+	unsigned int temp;
+	int c, k;
+
+	if (j->code_bits < 16)
+		stbi__grow_buffer_unsafe(j);
+
+	// look at the top FAST_BITS and determine what symbol ID it is,
+	// if the code is <= FAST_BITS
+	c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1);
+	k = h->fast[c];
+	if (k < 255) {
+		int s = h->size[k];
+		if (s > j->code_bits)
+			return -1;
+		j->code_buffer <<= s;
+		j->code_bits -= s;
+		return h->values[k];
+	}
+
+	// naive test is to shift the code_buffer down so k bits are
+	// valid, then test against maxcode. To speed this up, we've
+	// preshifted maxcode left so that it has (16-k) 0s at the
+	// end; in other words, regardless of the number of bits, it
+	// wants to be compared against something shifted to have 16;
+	// that way we don't need to shift inside the loop.
+	temp = j->code_buffer >> 16;
+	for (k = FAST_BITS + 1;; ++k)
+		if (temp < h->maxcode[k])
+			break;
+	if (k == 17) {
+		// error! code not found
+		j->code_bits -= 16;
+		return -1;
+	}
+
+	if (k > j->code_bits)
+		return -1;
+
+	// convert the huffman code to the symbol id
+	c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
+	STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
+
+	// convert the id to a symbol
+	j->code_bits -= k;
+	j->code_buffer <<= k;
+	return h->values[c];
+}
+
+// bias[n] = (-1<<n) + 1
+static const int stbi__jbias[16] = {0, -1, -3, -7, -15, -31, -63, -127, -255, -511, -1023, -2047, -4095, -8191, -16383, -32767};
+
+// combined JPEG 'receive' and JPEG 'extend', since baseline
+// always extends everything it receives.
+stbi_inline static int stbi__extend_receive(stbi__jpeg* j, int n) {
+	unsigned int k;
+	int sgn;
+	if (j->code_bits < n)
+		stbi__grow_buffer_unsafe(j);
+
+	sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB
+	k = stbi_lrot(j->code_buffer, n);
+	STBI_ASSERT(n >= 0 && n < (int)(sizeof(stbi__bmask) / sizeof(*stbi__bmask)));
+	j->code_buffer = k & ~stbi__bmask[n];
+	k &= stbi__bmask[n];
+	j->code_bits -= n;
+	return k + (stbi__jbias[n] & ~sgn);
+}
+
+// get some unsigned bits
+stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg* j, int n) {
+	unsigned int k;
+	if (j->code_bits < n)
+		stbi__grow_buffer_unsafe(j);
+	k = stbi_lrot(j->code_buffer, n);
+	j->code_buffer = k & ~stbi__bmask[n];
+	k &= stbi__bmask[n];
+	j->code_bits -= n;
+	return k;
+}
+
+stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg* j) {
+	unsigned int k;
+	if (j->code_bits < 1)
+		stbi__grow_buffer_unsafe(j);
+	k = j->code_buffer;
+	j->code_buffer <<= 1;
+	--j->code_bits;
+	return k & 0x80000000;
+}
+
+// given a value that's at position X in the zigzag stream,
+// where does it appear in the 8x8 matrix coded as row-major?
+static const stbi_uc stbi__jpeg_dezigzag[64 + 15] = {0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5, 12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7,
+													 14, 21, 28, 35, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51, 58, 59, 52, 45, 38, 31, 39, 46,
+													 53, 60, 61, 54, 47, 55, 62, 63,
+													 // let corrupt input sample past end
+													 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63};
+
+// decode one 64-entry block--
+static int stbi__jpeg_decode_block(stbi__jpeg* j, short data[64], stbi__huffman* hdc, stbi__huffman* hac, stbi__int16* fac, int b, stbi__uint16* dequant) {
+	int diff, dc, k;
+	int t;
+
+	if (j->code_bits < 16)
+		stbi__grow_buffer_unsafe(j);
+	t = stbi__jpeg_huff_decode(j, hdc);
+	if (t < 0)
+		return stbi__err("bad huffman code", "Corrupt JPEG");
+
+	// 0 all the ac values now so we can do it 32-bits at a time
+	memset(data, 0, 64 * sizeof(data[0]));
+
+	diff = t ? stbi__extend_receive(j, t) : 0;
+	dc = j->img_comp[b].dc_pred + diff;
+	j->img_comp[b].dc_pred = dc;
+	data[0] = (short)(dc * dequant[0]);
+
+	// decode AC components, see JPEG spec
+	k = 1;
+	do {
+		unsigned int zig;
+		int c, r, s;
+		if (j->code_bits < 16)
+			stbi__grow_buffer_unsafe(j);
+		c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1);
+		r = fac[c];
+		if (r) {				// fast-AC path
+			k += (r >> 4) & 15; // run
+			s = r & 15;			// combined length
+			j->code_buffer <<= s;
+			j->code_bits -= s;
+			// decode into unzigzag'd location
+			zig = stbi__jpeg_dezigzag[k++];
+			data[zig] = (short)((r >> 8) * dequant[zig]);
+		} else {
+			int rs = stbi__jpeg_huff_decode(j, hac);
+			if (rs < 0)
+				return stbi__err("bad huffman code", "Corrupt JPEG");
+			s = rs & 15;
+			r = rs >> 4;
+			if (s == 0) {
+				if (rs != 0xf0)
+					break; // end block
+				k += 16;
+			} else {
+				k += r;
+				// decode into unzigzag'd location
+				zig = stbi__jpeg_dezigzag[k++];
+				data[zig] = (short)(stbi__extend_receive(j, s) * dequant[zig]);
+			}
+		}
+	} while (k < 64);
+	return 1;
+}
+
+static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg* j, short data[64], stbi__huffman* hdc, int b) {
+	int diff, dc;
+	int t;
+	if (j->spec_end != 0)
+		return stbi__err("can't merge dc and ac", "Corrupt JPEG");
+
+	if (j->code_bits < 16)
+		stbi__grow_buffer_unsafe(j);
+
+	if (j->succ_high == 0) {
+		// first scan for DC coefficient, must be first
+		memset(data, 0, 64 * sizeof(data[0])); // 0 all the ac values now
+		t = stbi__jpeg_huff_decode(j, hdc);
+		diff = t ? stbi__extend_receive(j, t) : 0;
+
+		dc = j->img_comp[b].dc_pred + diff;
+		j->img_comp[b].dc_pred = dc;
+		data[0] = (short)(dc << j->succ_low);
+	} else {
+		// refinement scan for DC coefficient
+		if (stbi__jpeg_get_bit(j))
+			data[0] += (short)(1 << j->succ_low);
+	}
+	return 1;
+}
+
+// @OPTIMIZE: store non-zigzagged during the decode passes,
+// and only de-zigzag when dequantizing
+static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg* j, short data[64], stbi__huffman* hac, stbi__int16* fac) {
+	int k;
+	if (j->spec_start == 0)
+		return stbi__err("can't merge dc and ac", "Corrupt JPEG");
+
+	if (j->succ_high == 0) {
+		int shift = j->succ_low;
+
+		if (j->eob_run) {
+			--j->eob_run;
+			return 1;
+		}
+
+		k = j->spec_start;
+		do {
+			unsigned int zig;
+			int c, r, s;
+			if (j->code_bits < 16)
+				stbi__grow_buffer_unsafe(j);
+			c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1);
+			r = fac[c];
+			if (r) {				// fast-AC path
+				k += (r >> 4) & 15; // run
+				s = r & 15;			// combined length
+				j->code_buffer <<= s;
+				j->code_bits -= s;
+				zig = stbi__jpeg_dezigzag[k++];
+				data[zig] = (short)((r >> 8) << shift);
+			} else {
+				int rs = stbi__jpeg_huff_decode(j, hac);
+				if (rs < 0)
+					return stbi__err("bad huffman code", "Corrupt JPEG");
+				s = rs & 15;
+				r = rs >> 4;
+				if (s == 0) {
+					if (r < 15) {
+						j->eob_run = (1 << r);
+						if (r)
+							j->eob_run += stbi__jpeg_get_bits(j, r);
+						--j->eob_run;
+						break;
+					}
+					k += 16;
+				} else {
+					k += r;
+					zig = stbi__jpeg_dezigzag[k++];
+					data[zig] = (short)(stbi__extend_receive(j, s) << shift);
+				}
+			}
+		} while (k <= j->spec_end);
+	} else {
+		// refinement scan for these AC coefficients
+
+		short bit = (short)(1 << j->succ_low);
+
+		if (j->eob_run) {
+			--j->eob_run;
+			for (k = j->spec_start; k <= j->spec_end; ++k) {
+				short* p = &data[stbi__jpeg_dezigzag[k]];
+				if (*p != 0)
+					if (stbi__jpeg_get_bit(j))
+						if ((*p & bit) == 0) {
+							if (*p > 0)
+								*p += bit;
+							else
+								*p -= bit;
+						}
+			}
+		} else {
+			k = j->spec_start;
+			do {
+				int r, s;
+				int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here,
+														 // advance-by-r is so slow, eh
+				if (rs < 0)
+					return stbi__err("bad huffman code", "Corrupt JPEG");
+				s = rs & 15;
+				r = rs >> 4;
+				if (s == 0) {
+					if (r < 15) {
+						j->eob_run = (1 << r) - 1;
+						if (r)
+							j->eob_run += stbi__jpeg_get_bits(j, r);
+						r = 64; // force end of block
+					} else {
+						// r=15 s=0 should write 16 0s, so we just do
+						// a run of 15 0s and then write s (which is 0),
+						// so we don't have to do anything special here
+					}
+				} else {
+					if (s != 1)
+						return stbi__err("bad huffman code", "Corrupt JPEG");
+					// sign bit
+					if (stbi__jpeg_get_bit(j))
+						s = bit;
+					else
+						s = -bit;
+				}
+
+				// advance by r
+				while (k <= j->spec_end) {
+					short* p = &data[stbi__jpeg_dezigzag[k++]];
+					if (*p != 0) {
+						if (stbi__jpeg_get_bit(j))
+							if ((*p & bit) == 0) {
+								if (*p > 0)
+									*p += bit;
+								else
+									*p -= bit;
+							}
+					} else {
+						if (r == 0) {
+							*p = (short)s;
+							break;
+						}
+						--r;
+					}
+				}
+			} while (k <= j->spec_end);
+		}
+	}
+	return 1;
+}
+
+// take a -128..127 value and stbi__clamp it and convert to 0..255
+stbi_inline static stbi_uc stbi__clamp(int x) {
+	// trick to use a single test to catch both cases
+	if ((unsigned int)x > 255) {
+		if (x < 0)
+			return 0;
+		if (x > 255)
+			return 255;
+	}
+	return (stbi_uc)x;
+}
+
+#define stbi__f2f(x) ((int)(((x)*4096 + 0.5)))
+#define stbi__fsh(x) ((x)*4096)
+
+// derived from jidctint -- DCT_ISLOW
+#define STBI__IDCT_1D(s0, s1, s2, s3, s4, s5, s6, s7)                                                                                                          \
+	int t0, t1, t2, t3, p1, p2, p3, p4, p5, x0, x1, x2, x3;                                                                                                    \
+	p2 = s2;                                                                                                                                                   \
+	p3 = s6;                                                                                                                                                   \
+	p1 = (p2 + p3) * stbi__f2f(0.5411961f);                                                                                                                    \
+	t2 = p1 + p3 * stbi__f2f(-1.847759065f);                                                                                                                   \
+	t3 = p1 + p2 * stbi__f2f(0.765366865f);                                                                                                                    \
+	p2 = s0;                                                                                                                                                   \
+	p3 = s4;                                                                                                                                                   \
+	t0 = stbi__fsh(p2 + p3);                                                                                                                                   \
+	t1 = stbi__fsh(p2 - p3);                                                                                                                                   \
+	x0 = t0 + t3;                                                                                                                                              \
+	x3 = t0 - t3;                                                                                                                                              \
+	x1 = t1 + t2;                                                                                                                                              \
+	x2 = t1 - t2;                                                                                                                                              \
+	t0 = s7;                                                                                                                                                   \
+	t1 = s5;                                                                                                                                                   \
+	t2 = s3;                                                                                                                                                   \
+	t3 = s1;                                                                                                                                                   \
+	p3 = t0 + t2;                                                                                                                                              \
+	p4 = t1 + t3;                                                                                                                                              \
+	p1 = t0 + t3;                                                                                                                                              \
+	p2 = t1 + t2;                                                                                                                                              \
+	p5 = (p3 + p4) * stbi__f2f(1.175875602f);                                                                                                                  \
+	t0 = t0 * stbi__f2f(0.298631336f);                                                                                                                         \
+	t1 = t1 * stbi__f2f(2.053119869f);                                                                                                                         \
+	t2 = t2 * stbi__f2f(3.072711026f);                                                                                                                         \
+	t3 = t3 * stbi__f2f(1.501321110f);                                                                                                                         \
+	p1 = p5 + p1 * stbi__f2f(-0.899976223f);                                                                                                                   \
+	p2 = p5 + p2 * stbi__f2f(-2.562915447f);                                                                                                                   \
+	p3 = p3 * stbi__f2f(-1.961570560f);                                                                                                                        \
+	p4 = p4 * stbi__f2f(-0.390180644f);                                                                                                                        \
+	t3 += p1 + p4;                                                                                                                                             \
+	t2 += p2 + p3;                                                                                                                                             \
+	t1 += p2 + p4;                                                                                                                                             \
+	t0 += p1 + p3;
+
+static void stbi__idct_block(stbi_uc* out, int out_stride, short data[64]) {
+	int i, val[64], *v = val;
+	stbi_uc* o;
+	short* d = data;
+
+	// columns
+	for (i = 0; i < 8; ++i, ++d, ++v) {
+		// if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
+		if (d[8] == 0 && d[16] == 0 && d[24] == 0 && d[32] == 0 && d[40] == 0 && d[48] == 0 && d[56] == 0) {
+			//    no shortcut                 0     seconds
+			//    (1|2|3|4|5|6|7)==0          0     seconds
+			//    all separate               -0.047 seconds
+			//    1 && 2|3 && 4|5 && 6|7:    -0.047 seconds
+			int dcterm = d[0] * 4;
+			v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm;
+		} else {
+			STBI__IDCT_1D(d[0], d[8], d[16], d[24], d[32], d[40], d[48], d[56])
+			// constants scaled things up by 1<<12; let's bring them back
+			// down, but keep 2 extra bits of precision
+			x0 += 512;
+			x1 += 512;
+			x2 += 512;
+			x3 += 512;
+			v[0] = (x0 + t3) >> 10;
+			v[56] = (x0 - t3) >> 10;
+			v[8] = (x1 + t2) >> 10;
+			v[48] = (x1 - t2) >> 10;
+			v[16] = (x2 + t1) >> 10;
+			v[40] = (x2 - t1) >> 10;
+			v[24] = (x3 + t0) >> 10;
+			v[32] = (x3 - t0) >> 10;
+		}
+	}
+
+	for (i = 0, v = val, o = out; i < 8; ++i, v += 8, o += out_stride) {
+		// no fast case since the first 1D IDCT spread components out
+		STBI__IDCT_1D(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7])
+		// constants scaled things up by 1<<12, plus we had 1<<2 from first
+		// loop, plus horizontal and vertical each scale by sqrt(8) so together
+		// we've got an extra 1<<3, so 1<<17 total we need to remove.
+		// so we want to round that, which means adding 0.5 * 1<<17,
+		// aka 65536. Also, we'll end up with -128 to 127 that we want
+		// to encode as 0..255 by adding 128, so we'll add that before the shift
+		x0 += 65536 + (128 << 17);
+		x1 += 65536 + (128 << 17);
+		x2 += 65536 + (128 << 17);
+		x3 += 65536 + (128 << 17);
+		// tried computing the shifts into temps, or'ing the temps to see
+		// if any were out of range, but that was slower
+		o[0] = stbi__clamp((x0 + t3) >> 17);
+		o[7] = stbi__clamp((x0 - t3) >> 17);
+		o[1] = stbi__clamp((x1 + t2) >> 17);
+		o[6] = stbi__clamp((x1 - t2) >> 17);
+		o[2] = stbi__clamp((x2 + t1) >> 17);
+		o[5] = stbi__clamp((x2 - t1) >> 17);
+		o[3] = stbi__clamp((x3 + t0) >> 17);
+		o[4] = stbi__clamp((x3 - t0) >> 17);
+	}
+}
+
+#ifdef STBI_SSE2
+// sse2 integer IDCT. not the fastest possible implementation but it
+// produces bit-identical results to the generic C version so it's
+// fully "transparent".
+static void stbi__idct_simd(stbi_uc* out, int out_stride, short data[64]) {
+	// This is constructed to match our regular (generic) integer IDCT exactly.
+	__m128i row0, row1, row2, row3, row4, row5, row6, row7;
+	__m128i tmp;
+
+// dot product constant: even elems=x, odd elems=y
+#define dct_const(x, y) _mm_setr_epi16((x), (y), (x), (y), (x), (y), (x), (y))
+
+// out(0) = c0[even]*x + c0[odd]*y   (c0, x, y 16-bit, out 32-bit)
+// out(1) = c1[even]*x + c1[odd]*y
+#define dct_rot(out0, out1, x, y, c0, c1)                                                                                                                      \
+	__m128i c0##lo = _mm_unpacklo_epi16((x), (y));                                                                                                             \
+	__m128i c0##hi = _mm_unpackhi_epi16((x), (y));                                                                                                             \
+	__m128i out0##_l = _mm_madd_epi16(c0##lo, c0);                                                                                                             \
+	__m128i out0##_h = _mm_madd_epi16(c0##hi, c0);                                                                                                             \
+	__m128i out1##_l = _mm_madd_epi16(c0##lo, c1);                                                                                                             \
+	__m128i out1##_h = _mm_madd_epi16(c0##hi, c1)
+
+// out = in << 12  (in 16-bit, out 32-bit)
+#define dct_widen(out, in)                                                                                                                                     \
+	__m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4);                                                                        \
+	__m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4)
+
+// wide add
+#define dct_wadd(out, a, b)                                                                                                                                    \
+	__m128i out##_l = _mm_add_epi32(a##_l, b##_l);                                                                                                             \
+	__m128i out##_h = _mm_add_epi32(a##_h, b##_h)
+
+// wide sub
+#define dct_wsub(out, a, b)                                                                                                                                    \
+	__m128i out##_l = _mm_sub_epi32(a##_l, b##_l);                                                                                                             \
+	__m128i out##_h = _mm_sub_epi32(a##_h, b##_h)
+
+// butterfly a/b, add bias, then shift by "s" and pack
+#define dct_bfly32o(out0, out1, a, b, bias, s)                                                                                                                 \
+	{                                                                                                                                                          \
+		__m128i abiased_l = _mm_add_epi32(a##_l, bias);                                                                                                        \
+		__m128i abiased_h = _mm_add_epi32(a##_h, bias);                                                                                                        \
+		dct_wadd(sum, abiased, b);                                                                                                                             \
+		dct_wsub(dif, abiased, b);                                                                                                                             \
+		out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s));                                                                            \
+		out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s));                                                                            \
+	}
+
+// 8-bit interleave step (for transposes)
+#define dct_interleave8(a, b)                                                                                                                                  \
+	tmp = a;                                                                                                                                                   \
+	a = _mm_unpacklo_epi8(a, b);                                                                                                                               \
+	b = _mm_unpackhi_epi8(tmp, b)
+
+// 16-bit interleave step (for transposes)
+#define dct_interleave16(a, b)                                                                                                                                 \
+	tmp = a;                                                                                                                                                   \
+	a = _mm_unpacklo_epi16(a, b);                                                                                                                              \
+	b = _mm_unpackhi_epi16(tmp, b)
+
+#define dct_pass(bias, shift)                                                                                                                                  \
+	{                                                                                                                                                          \
+		/* even part */                                                                                                                                        \
+		dct_rot(t2e, t3e, row2, row6, rot0_0, rot0_1);                                                                                                         \
+		__m128i sum04 = _mm_add_epi16(row0, row4);                                                                                                             \
+		__m128i dif04 = _mm_sub_epi16(row0, row4);                                                                                                             \
+		dct_widen(t0e, sum04);                                                                                                                                 \
+		dct_widen(t1e, dif04);                                                                                                                                 \
+		dct_wadd(x0, t0e, t3e);                                                                                                                                \
+		dct_wsub(x3, t0e, t3e);                                                                                                                                \
+		dct_wadd(x1, t1e, t2e);                                                                                                                                \
+		dct_wsub(x2, t1e, t2e);                                                                                                                                \
+		/* odd part */                                                                                                                                         \
+		dct_rot(y0o, y2o, row7, row3, rot2_0, rot2_1);                                                                                                         \
+		dct_rot(y1o, y3o, row5, row1, rot3_0, rot3_1);                                                                                                         \
+		__m128i sum17 = _mm_add_epi16(row1, row7);                                                                                                             \
+		__m128i sum35 = _mm_add_epi16(row3, row5);                                                                                                             \
+		dct_rot(y4o, y5o, sum17, sum35, rot1_0, rot1_1);                                                                                                       \
+		dct_wadd(x4, y0o, y4o);                                                                                                                                \
+		dct_wadd(x5, y1o, y5o);                                                                                                                                \
+		dct_wadd(x6, y2o, y5o);                                                                                                                                \
+		dct_wadd(x7, y3o, y4o);                                                                                                                                \
+		dct_bfly32o(row0, row7, x0, x7, bias, shift);                                                                                                          \
+		dct_bfly32o(row1, row6, x1, x6, bias, shift);                                                                                                          \
+		dct_bfly32o(row2, row5, x2, x5, bias, shift);                                                                                                          \
+		dct_bfly32o(row3, row4, x3, x4, bias, shift);                                                                                                          \
+	}
+
+	__m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f));
+	__m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f(0.765366865f), stbi__f2f(0.5411961f));
+	__m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f));
+	__m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f));
+	__m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f(0.298631336f), stbi__f2f(-1.961570560f));
+	__m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f(3.072711026f));
+	__m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f(2.053119869f), stbi__f2f(-0.390180644f));
+	__m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f(1.501321110f));
+
+	// rounding biases in column/row passes, see stbi__idct_block for
+	// explanation.
+	__m128i bias_0 = _mm_set1_epi32(512);
+	__m128i bias_1 = _mm_set1_epi32(65536 + (128 << 17));
+
+	// load
+	row0 = _mm_load_si128((const __m128i*)(data + 0 * 8));
+	row1 = _mm_load_si128((const __m128i*)(data + 1 * 8));
+	row2 = _mm_load_si128((const __m128i*)(data + 2 * 8));
+	row3 = _mm_load_si128((const __m128i*)(data + 3 * 8));
+	row4 = _mm_load_si128((const __m128i*)(data + 4 * 8));
+	row5 = _mm_load_si128((const __m128i*)(data + 5 * 8));
+	row6 = _mm_load_si128((const __m128i*)(data + 6 * 8));
+	row7 = _mm_load_si128((const __m128i*)(data + 7 * 8));
+
+	// column pass
+	dct_pass(bias_0, 10);
+
+	{
+		// 16bit 8x8 transpose pass 1
+		dct_interleave16(row0, row4);
+		dct_interleave16(row1, row5);
+		dct_interleave16(row2, row6);
+		dct_interleave16(row3, row7);
+
+		// transpose pass 2
+		dct_interleave16(row0, row2);
+		dct_interleave16(row1, row3);
+		dct_interleave16(row4, row6);
+		dct_interleave16(row5, row7);
+
+		// transpose pass 3
+		dct_interleave16(row0, row1);
+		dct_interleave16(row2, row3);
+		dct_interleave16(row4, row5);
+		dct_interleave16(row6, row7);
+	}
+
+	// row pass
+	dct_pass(bias_1, 17);
+
+	{
+		// pack
+		__m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7
+		__m128i p1 = _mm_packus_epi16(row2, row3);
+		__m128i p2 = _mm_packus_epi16(row4, row5);
+		__m128i p3 = _mm_packus_epi16(row6, row7);
+
+		// 8bit 8x8 transpose pass 1
+		dct_interleave8(p0, p2); // a0e0a1e1...
+		dct_interleave8(p1, p3); // c0g0c1g1...
+
+		// transpose pass 2
+		dct_interleave8(p0, p1); // a0c0e0g0...
+		dct_interleave8(p2, p3); // b0d0f0h0...
+
+		// transpose pass 3
+		dct_interleave8(p0, p2); // a0b0c0d0...
+		dct_interleave8(p1, p3); // a4b4c4d4...
+
+		// store
+		_mm_storel_epi64((__m128i*)out, p0);
+		out += out_stride;
+		_mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p0, 0x4e));
+		out += out_stride;
+		_mm_storel_epi64((__m128i*)out, p2);
+		out += out_stride;
+		_mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p2, 0x4e));
+		out += out_stride;
+		_mm_storel_epi64((__m128i*)out, p1);
+		out += out_stride;
+		_mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p1, 0x4e));
+		out += out_stride;
+		_mm_storel_epi64((__m128i*)out, p3);
+		out += out_stride;
+		_mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p3, 0x4e));
+	}
+
+#undef dct_const
+#undef dct_rot
+#undef dct_widen
+#undef dct_wadd
+#undef dct_wsub
+#undef dct_bfly32o
+#undef dct_interleave8
+#undef dct_interleave16
+#undef dct_pass
+}
+
+#endif // STBI_SSE2
+
+#ifdef STBI_NEON
+
+// NEON integer IDCT. should produce bit-identical
+// results to the generic C version.
+static void stbi__idct_simd(stbi_uc* out, int out_stride, short data[64]) {
+	int16x8_t row0, row1, row2, row3, row4, row5, row6, row7;
+
+	int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f));
+	int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f));
+	int16x4_t rot0_2 = vdup_n_s16(stbi__f2f(0.765366865f));
+	int16x4_t rot1_0 = vdup_n_s16(stbi__f2f(1.175875602f));
+	int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f));
+	int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f));
+	int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f));
+	int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f));
+	int16x4_t rot3_0 = vdup_n_s16(stbi__f2f(0.298631336f));
+	int16x4_t rot3_1 = vdup_n_s16(stbi__f2f(2.053119869f));
+	int16x4_t rot3_2 = vdup_n_s16(stbi__f2f(3.072711026f));
+	int16x4_t rot3_3 = vdup_n_s16(stbi__f2f(1.501321110f));
+
+#define dct_long_mul(out, inq, coeff)                                                                                                                          \
+	int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff);                                                                                                   \
+	int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff)
+
+#define dct_long_mac(out, acc, inq, coeff)                                                                                                                     \
+	int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff);                                                                                          \
+	int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff)
+
+#define dct_widen(out, inq)                                                                                                                                    \
+	int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12);                                                                                                    \
+	int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12)
+
+// wide add
+#define dct_wadd(out, a, b)                                                                                                                                    \
+	int32x4_t out##_l = vaddq_s32(a##_l, b##_l);                                                                                                               \
+	int32x4_t out##_h = vaddq_s32(a##_h, b##_h)
+
+// wide sub
+#define dct_wsub(out, a, b)                                                                                                                                    \
+	int32x4_t out##_l = vsubq_s32(a##_l, b##_l);                                                                                                               \
+	int32x4_t out##_h = vsubq_s32(a##_h, b##_h)
+
+// butterfly a/b, then shift using "shiftop" by "s" and pack
+#define dct_bfly32o(out0, out1, a, b, shiftop, s)                                                                                                              \
+	{                                                                                                                                                          \
+		dct_wadd(sum, a, b);                                                                                                                                   \
+		dct_wsub(dif, a, b);                                                                                                                                   \
+		out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s));                                                                                             \
+		out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s));                                                                                             \
+	}
+
+#define dct_pass(shiftop, shift)                                                                                                                               \
+	{                                                                                                                                                          \
+		/* even part */                                                                                                                                        \
+		int16x8_t sum26 = vaddq_s16(row2, row6);                                                                                                               \
+		dct_long_mul(p1e, sum26, rot0_0);                                                                                                                      \
+		dct_long_mac(t2e, p1e, row6, rot0_1);                                                                                                                  \
+		dct_long_mac(t3e, p1e, row2, rot0_2);                                                                                                                  \
+		int16x8_t sum04 = vaddq_s16(row0, row4);                                                                                                               \
+		int16x8_t dif04 = vsubq_s16(row0, row4);                                                                                                               \
+		dct_widen(t0e, sum04);                                                                                                                                 \
+		dct_widen(t1e, dif04);                                                                                                                                 \
+		dct_wadd(x0, t0e, t3e);                                                                                                                                \
+		dct_wsub(x3, t0e, t3e);                                                                                                                                \
+		dct_wadd(x1, t1e, t2e);                                                                                                                                \
+		dct_wsub(x2, t1e, t2e);                                                                                                                                \
+		/* odd part */                                                                                                                                         \
+		int16x8_t sum15 = vaddq_s16(row1, row5);                                                                                                               \
+		int16x8_t sum17 = vaddq_s16(row1, row7);                                                                                                               \
+		int16x8_t sum35 = vaddq_s16(row3, row5);                                                                                                               \
+		int16x8_t sum37 = vaddq_s16(row3, row7);                                                                                                               \
+		int16x8_t sumodd = vaddq_s16(sum17, sum35);                                                                                                            \
+		dct_long_mul(p5o, sumodd, rot1_0);                                                                                                                     \
+		dct_long_mac(p1o, p5o, sum17, rot1_1);                                                                                                                 \
+		dct_long_mac(p2o, p5o, sum35, rot1_2);                                                                                                                 \
+		dct_long_mul(p3o, sum37, rot2_0);                                                                                                                      \
+		dct_long_mul(p4o, sum15, rot2_1);                                                                                                                      \
+		dct_wadd(sump13o, p1o, p3o);                                                                                                                           \
+		dct_wadd(sump24o, p2o, p4o);                                                                                                                           \
+		dct_wadd(sump23o, p2o, p3o);                                                                                                                           \
+		dct_wadd(sump14o, p1o, p4o);                                                                                                                           \
+		dct_long_mac(x4, sump13o, row7, rot3_0);                                                                                                               \
+		dct_long_mac(x5, sump24o, row5, rot3_1);                                                                                                               \
+		dct_long_mac(x6, sump23o, row3, rot3_2);                                                                                                               \
+		dct_long_mac(x7, sump14o, row1, rot3_3);                                                                                                               \
+		dct_bfly32o(row0, row7, x0, x7, shiftop, shift);                                                                                                       \
+		dct_bfly32o(row1, row6, x1, x6, shiftop, shift);                                                                                                       \
+		dct_bfly32o(row2, row5, x2, x5, shiftop, shift);                                                                                                       \
+		dct_bfly32o(row3, row4, x3, x4, shiftop, shift);                                                                                                       \
+	}
+
+	// load
+	row0 = vld1q_s16(data + 0 * 8);
+	row1 = vld1q_s16(data + 1 * 8);
+	row2 = vld1q_s16(data + 2 * 8);
+	row3 = vld1q_s16(data + 3 * 8);
+	row4 = vld1q_s16(data + 4 * 8);
+	row5 = vld1q_s16(data + 5 * 8);
+	row6 = vld1q_s16(data + 6 * 8);
+	row7 = vld1q_s16(data + 7 * 8);
+
+	// add DC bias
+	row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0));
+
+	// column pass
+	dct_pass(vrshrn_n_s32, 10);
+
+	// 16bit 8x8 transpose
+	{
+// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively.
+// whether compilers actually get this is another story, sadly.
+#define dct_trn16(x, y)                                                                                                                                        \
+	{                                                                                                                                                          \
+		int16x8x2_t t = vtrnq_s16(x, y);                                                                                                                       \
+		x = t.val[0];                                                                                                                                          \
+		y = t.val[1];                                                                                                                                          \
+	}
+#define dct_trn32(x, y)                                                                                                                                        \
+	{                                                                                                                                                          \
+		int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y));                                                                         \
+		x = vreinterpretq_s16_s32(t.val[0]);                                                                                                                   \
+		y = vreinterpretq_s16_s32(t.val[1]);                                                                                                                   \
+	}
+#define dct_trn64(x, y)                                                                                                                                        \
+	{                                                                                                                                                          \
+		int16x8_t x0 = x;                                                                                                                                      \
+		int16x8_t y0 = y;                                                                                                                                      \
+		x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0));                                                                                                  \
+		y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0));                                                                                                \
+	}
+
+		// pass 1
+		dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6
+		dct_trn16(row2, row3);
+		dct_trn16(row4, row5);
+		dct_trn16(row6, row7);
+
+		// pass 2
+		dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4
+		dct_trn32(row1, row3);
+		dct_trn32(row4, row6);
+		dct_trn32(row5, row7);
+
+		// pass 3
+		dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0
+		dct_trn64(row1, row5);
+		dct_trn64(row2, row6);
+		dct_trn64(row3, row7);
+
+#undef dct_trn16
+#undef dct_trn32
+#undef dct_trn64
+	}
+
+	// row pass
+	// vrshrn_n_s32 only supports shifts up to 16, we need
+	// 17. so do a non-rounding shift of 16 first then follow
+	// up with a rounding shift by 1.
+	dct_pass(vshrn_n_s32, 16);
+
+	{
+		// pack and round
+		uint8x8_t p0 = vqrshrun_n_s16(row0, 1);
+		uint8x8_t p1 = vqrshrun_n_s16(row1, 1);
+		uint8x8_t p2 = vqrshrun_n_s16(row2, 1);
+		uint8x8_t p3 = vqrshrun_n_s16(row3, 1);
+		uint8x8_t p4 = vqrshrun_n_s16(row4, 1);
+		uint8x8_t p5 = vqrshrun_n_s16(row5, 1);
+		uint8x8_t p6 = vqrshrun_n_s16(row6, 1);
+		uint8x8_t p7 = vqrshrun_n_s16(row7, 1);
+
+		// again, these can translate into one instruction, but often don't.
+#define dct_trn8_8(x, y)                                                                                                                                       \
+	{                                                                                                                                                          \
+		uint8x8x2_t t = vtrn_u8(x, y);                                                                                                                         \
+		x = t.val[0];                                                                                                                                          \
+		y = t.val[1];                                                                                                                                          \
+	}
+#define dct_trn8_16(x, y)                                                                                                                                      \
+	{                                                                                                                                                          \
+		uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y));                                                                             \
+		x = vreinterpret_u8_u16(t.val[0]);                                                                                                                     \
+		y = vreinterpret_u8_u16(t.val[1]);                                                                                                                     \
+	}
+#define dct_trn8_32(x, y)                                                                                                                                      \
+	{                                                                                                                                                          \
+		uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y));                                                                             \
+		x = vreinterpret_u8_u32(t.val[0]);                                                                                                                     \
+		y = vreinterpret_u8_u32(t.val[1]);                                                                                                                     \
+	}
+
+		// sadly can't use interleaved stores here since we only write
+		// 8 bytes to each scan line!
+
+		// 8x8 8-bit transpose pass 1
+		dct_trn8_8(p0, p1);
+		dct_trn8_8(p2, p3);
+		dct_trn8_8(p4, p5);
+		dct_trn8_8(p6, p7);
+
+		// pass 2
+		dct_trn8_16(p0, p2);
+		dct_trn8_16(p1, p3);
+		dct_trn8_16(p4, p6);
+		dct_trn8_16(p5, p7);
+
+		// pass 3
+		dct_trn8_32(p0, p4);
+		dct_trn8_32(p1, p5);
+		dct_trn8_32(p2, p6);
+		dct_trn8_32(p3, p7);
+
+		// store
+		vst1_u8(out, p0);
+		out += out_stride;
+		vst1_u8(out, p1);
+		out += out_stride;
+		vst1_u8(out, p2);
+		out += out_stride;
+		vst1_u8(out, p3);
+		out += out_stride;
+		vst1_u8(out, p4);
+		out += out_stride;
+		vst1_u8(out, p5);
+		out += out_stride;
+		vst1_u8(out, p6);
+		out += out_stride;
+		vst1_u8(out, p7);
+
+#undef dct_trn8_8
+#undef dct_trn8_16
+#undef dct_trn8_32
+	}
+
+#undef dct_long_mul
+#undef dct_long_mac
+#undef dct_widen
+#undef dct_wadd
+#undef dct_wsub
+#undef dct_bfly32o
+#undef dct_pass
+}
+
+#endif // STBI_NEON
+
+#define STBI__MARKER_none 0xff
+// if there's a pending marker from the entropy stream, return that
+// otherwise, fetch from the stream and get a marker. if there's no
+// marker, return 0xff, which is never a valid marker value
+static stbi_uc stbi__get_marker(stbi__jpeg* j) {
+	stbi_uc x;
+	if (j->marker != STBI__MARKER_none) {
+		x = j->marker;
+		j->marker = STBI__MARKER_none;
+		return x;
+	}
+	x = stbi__get8(j->s);
+	if (x != 0xff)
+		return STBI__MARKER_none;
+	while (x == 0xff)
+		x = stbi__get8(j->s); // consume repeated 0xff fill bytes
+	return x;
+}
+
+// in each scan, we'll have scan_n components, and the order
+// of the components is specified by order[]
+#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7)
+
+// after a restart interval, stbi__jpeg_reset the entropy decoder and
+// the dc prediction
+static void stbi__jpeg_reset(stbi__jpeg* j) {
+	j->code_bits = 0;
+	j->code_buffer = 0;
+	j->nomore = 0;
+	j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0;
+	j->marker = STBI__MARKER_none;
+	j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff;
+	j->eob_run = 0;
+	// no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
+	// since we don't even allow 1<<30 pixels
+}
+
+static int stbi__parse_entropy_coded_data(stbi__jpeg* z) {
+	stbi__jpeg_reset(z);
+	if (!z->progressive) {
+		if (z->scan_n == 1) {
+			int i, j;
+			STBI_SIMD_ALIGN(short, data[64]);
+			int n = z->order[0];
+			// non-interleaved data, we just need to process one block at a
+			// time, in trivial scanline order number of blocks to do just
+			// depends on how many actual "pixels" this component has,
+			// independent of interleaved MCU blocking and such
+			int w = (z->img_comp[n].x + 7) >> 3;
+			int h = (z->img_comp[n].y + 7) >> 3;
+			for (j = 0; j < h; ++j) {
+				for (i = 0; i < w; ++i) {
+					int ha = z->img_comp[n].ha;
+					if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq]))
+						return 0;
+					z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data);
+					// every data block is an MCU, so countdown the restart
+					// interval
+					if (--z->todo <= 0) {
+						if (z->code_bits < 24)
+							stbi__grow_buffer_unsafe(z);
+						// if it's NOT a restart, then just bail, so we get
+						// corrupt data rather than no data
+						if (!STBI__RESTART(z->marker))
+							return 1;
+						stbi__jpeg_reset(z);
+					}
+				}
+			}
+			return 1;
+		} else { // interleaved
+			int i, j, k, x, y;
+			STBI_SIMD_ALIGN(short, data[64]);
+			for (j = 0; j < z->img_mcu_y; ++j) {
+				for (i = 0; i < z->img_mcu_x; ++i) {
+					// scan an interleaved mcu... process scan_n components in
+					// order
+					for (k = 0; k < z->scan_n; ++k) {
+						int n = z->order[k];
+						// scan out an mcu's worth of this component; that's
+						// just determined by the basic H and V specified for
+						// the component
+						for (y = 0; y < z->img_comp[n].v; ++y) {
+							for (x = 0; x < z->img_comp[n].h; ++x) {
+								int x2 = (i * z->img_comp[n].h + x) * 8;
+								int y2 = (j * z->img_comp[n].v + y) * 8;
+								int ha = z->img_comp[n].ha;
+								if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, z->fast_ac[ha], n,
+															 z->dequant[z->img_comp[n].tq]))
+									return 0;
+								z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * y2 + x2, z->img_comp[n].w2, data);
+							}
+						}
+					}
+					// after all interleaved components, that's an interleaved
+					// MCU, so now count down the restart interval
+					if (--z->todo <= 0) {
+						if (z->code_bits < 24)
+							stbi__grow_buffer_unsafe(z);
+						if (!STBI__RESTART(z->marker))
+							return 1;
+						stbi__jpeg_reset(z);
+					}
+				}
+			}
+			return 1;
+		}
+	} else {
+		if (z->scan_n == 1) {
+			int i, j;
+			int n = z->order[0];
+			// non-interleaved data, we just need to process one block at a
+			// time, in trivial scanline order number of blocks to do just
+			// depends on how many actual "pixels" this component has,
+			// independent of interleaved MCU blocking and such
+			int w = (z->img_comp[n].x + 7) >> 3;
+			int h = (z->img_comp[n].y + 7) >> 3;
+			for (j = 0; j < h; ++j) {
+				for (i = 0; i < w; ++i) {
+					short* data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
+					if (z->spec_start == 0) {
+						if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
+							return 0;
+					} else {
+						int ha = z->img_comp[n].ha;
+						if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha]))
+							return 0;
+					}
+					// every data block is an MCU, so countdown the restart
+					// interval
+					if (--z->todo <= 0) {
+						if (z->code_bits < 24)
+							stbi__grow_buffer_unsafe(z);
+						if (!STBI__RESTART(z->marker))
+							return 1;
+						stbi__jpeg_reset(z);
+					}
+				}
+			}
+			return 1;
+		} else { // interleaved
+			int i, j, k, x, y;
+			for (j = 0; j < z->img_mcu_y; ++j) {
+				for (i = 0; i < z->img_mcu_x; ++i) {
+					// scan an interleaved mcu... process scan_n components in
+					// order
+					for (k = 0; k < z->scan_n; ++k) {
+						int n = z->order[k];
+						// scan out an mcu's worth of this component; that's
+						// just determined by the basic H and V specified for
+						// the component
+						for (y = 0; y < z->img_comp[n].v; ++y) {
+							for (x = 0; x < z->img_comp[n].h; ++x) {
+								int x2 = (i * z->img_comp[n].h + x);
+								int y2 = (j * z->img_comp[n].v + y);
+								short* data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w);
+								if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
+									return 0;
+							}
+						}
+					}
+					// after all interleaved components, that's an interleaved
+					// MCU, so now count down the restart interval
+					if (--z->todo <= 0) {
+						if (z->code_bits < 24)
+							stbi__grow_buffer_unsafe(z);
+						if (!STBI__RESTART(z->marker))
+							return 1;
+						stbi__jpeg_reset(z);
+					}
+				}
+			}
+			return 1;
+		}
+	}
+}
+
+static void stbi__jpeg_dequantize(short* data, stbi__uint16* dequant) {
+	int i;
+	for (i = 0; i < 64; ++i)
+		data[i] *= dequant[i];
+}
+
+static void stbi__jpeg_finish(stbi__jpeg* z) {
+	if (z->progressive) {
+		// dequantize and idct the data
+		int i, j, n;
+		for (n = 0; n < z->s->img_n; ++n) {
+			int w = (z->img_comp[n].x + 7) >> 3;
+			int h = (z->img_comp[n].y + 7) >> 3;
+			for (j = 0; j < h; ++j) {
+				for (i = 0; i < w; ++i) {
+					short* data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
+					stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]);
+					z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data);
+				}
+			}
+		}
+	}
+}
+
+static int stbi__process_marker(stbi__jpeg* z, int m) {
+	int L;
+	switch (m) {
+	case STBI__MARKER_none: // no marker found
+		return stbi__err("expected marker", "Corrupt JPEG");
+
+	case 0xDD: // DRI - specify restart interval
+		if (stbi__get16be(z->s) != 4)
+			return stbi__err("bad DRI len", "Corrupt JPEG");
+		z->restart_interval = stbi__get16be(z->s);
+		return 1;
+
+	case 0xDB: // DQT - define quantization table
+		L = stbi__get16be(z->s) - 2;
+		while (L > 0) {
+			int q = stbi__get8(z->s);
+			int p = q >> 4, sixteen = (p != 0);
+			int t = q & 15, i;
+			if (p != 0 && p != 1)
+				return stbi__err("bad DQT type", "Corrupt JPEG");
+			if (t > 3)
+				return stbi__err("bad DQT table", "Corrupt JPEG");
+
+			for (i = 0; i < 64; ++i)
+				z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s));
+			L -= (sixteen ? 129 : 65);
+		}
+		return L == 0;
+
+	case 0xC4: // DHT - define huffman table
+		L = stbi__get16be(z->s) - 2;
+		while (L > 0) {
+			stbi_uc* v;
+			int sizes[16], i, n = 0;
+			int q = stbi__get8(z->s);
+			int tc = q >> 4;
+			int th = q & 15;
+			if (tc > 1 || th > 3)
+				return stbi__err("bad DHT header", "Corrupt JPEG");
+			for (i = 0; i < 16; ++i) {
+				sizes[i] = stbi__get8(z->s);
+				n += sizes[i];
+			}
+			L -= 17;
+			if (tc == 0) {
+				if (!stbi__build_huffman(z->huff_dc + th, sizes))
+					return 0;
+				v = z->huff_dc[th].values;
+			} else {
+				if (!stbi__build_huffman(z->huff_ac + th, sizes))
+					return 0;
+				v = z->huff_ac[th].values;
+			}
+			for (i = 0; i < n; ++i)
+				v[i] = stbi__get8(z->s);
+			if (tc != 0)
+				stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th);
+			L -= n;
+		}
+		return L == 0;
+	}
+
+	// check for comment block or APP blocks
+	if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) {
+		L = stbi__get16be(z->s);
+		if (L < 2) {
+			if (m == 0xFE)
+				return stbi__err("bad COM len", "Corrupt JPEG");
+			else
+				return stbi__err("bad APP len", "Corrupt JPEG");
+		}
+		L -= 2;
+
+		if (m == 0xE0 && L >= 5) { // JFIF APP0 segment
+			static const unsigned char tag[5] = {'J', 'F', 'I', 'F', '\0'};
+			int ok = 1;
+			int i;
+			for (i = 0; i < 5; ++i)
+				if (stbi__get8(z->s) != tag[i])
+					ok = 0;
+			L -= 5;
+			if (ok)
+				z->jfif = 1;
+		} else if (m == 0xEE && L >= 12) { // Adobe APP14 segment
+			static const unsigned char tag[6] = {'A', 'd', 'o', 'b', 'e', '\0'};
+			int ok = 1;
+			int i;
+			for (i = 0; i < 6; ++i)
+				if (stbi__get8(z->s) != tag[i])
+					ok = 0;
+			L -= 6;
+			if (ok) {
+				stbi__get8(z->s);							 // version
+				stbi__get16be(z->s);						 // flags0
+				stbi__get16be(z->s);						 // flags1
+				z->app14_color_transform = stbi__get8(z->s); // color transform
+				L -= 6;
+			}
+		}
+
+		stbi__skip(z->s, L);
+		return 1;
+	}
+
+	return stbi__err("unknown marker", "Corrupt JPEG");
+}
+
+// after we see SOS
+static int stbi__process_scan_header(stbi__jpeg* z) {
+	int i;
+	int Ls = stbi__get16be(z->s);
+	z->scan_n = stbi__get8(z->s);
+	if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int)z->s->img_n)
+		return stbi__err("bad SOS component count", "Corrupt JPEG");
+	if (Ls != 6 + 2 * z->scan_n)
+		return stbi__err("bad SOS len", "Corrupt JPEG");
+	for (i = 0; i < z->scan_n; ++i) {
+		int id = stbi__get8(z->s), which;
+		int q = stbi__get8(z->s);
+		for (which = 0; which < z->s->img_n; ++which)
+			if (z->img_comp[which].id == id)
+				break;
+		if (which == z->s->img_n)
+			return 0; // no match
+		z->img_comp[which].hd = q >> 4;
+		if (z->img_comp[which].hd > 3)
+			return stbi__err("bad DC huff", "Corrupt JPEG");
+		z->img_comp[which].ha = q & 15;
+		if (z->img_comp[which].ha > 3)
+			return stbi__err("bad AC huff", "Corrupt JPEG");
+		z->order[i] = which;
+	}
+
+	{
+		int aa;
+		z->spec_start = stbi__get8(z->s);
+		z->spec_end = stbi__get8(z->s); // should be 63, but might be 0
+		aa = stbi__get8(z->s);
+		z->succ_high = (aa >> 4);
+		z->succ_low = (aa & 15);
+		if (z->progressive) {
+			if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13)
+				return stbi__err("bad SOS", "Corrupt JPEG");
+		} else {
+			if (z->spec_start != 0)
+				return stbi__err("bad SOS", "Corrupt JPEG");
+			if (z->succ_high != 0 || z->succ_low != 0)
+				return stbi__err("bad SOS", "Corrupt JPEG");
+			z->spec_end = 63;
+		}
+	}
+
+	return 1;
+}
+
+static int stbi__free_jpeg_components(stbi__jpeg* z, int ncomp, int why) {
+	int i;
+	for (i = 0; i < ncomp; ++i) {
+		if (z->img_comp[i].raw_data) {
+			STBI_FREE(z->img_comp[i].raw_data);
+			z->img_comp[i].raw_data = NULL;
+			z->img_comp[i].data = NULL;
+		}
+		if (z->img_comp[i].raw_coeff) {
+			STBI_FREE(z->img_comp[i].raw_coeff);
+			z->img_comp[i].raw_coeff = 0;
+			z->img_comp[i].coeff = 0;
+		}
+		if (z->img_comp[i].linebuf) {
+			STBI_FREE(z->img_comp[i].linebuf);
+			z->img_comp[i].linebuf = NULL;
+		}
+	}
+	return why;
+}
+
+static int stbi__process_frame_header(stbi__jpeg* z, int scan) {
+	stbi__context* s = z->s;
+	int Lf, p, i, q, h_max = 1, v_max = 1, c;
+	Lf = stbi__get16be(s);
+	if (Lf < 11)
+		return stbi__err("bad SOF len", "Corrupt JPEG"); // JPEG
+	p = stbi__get8(s);
+	if (p != 8)
+		return stbi__err("only 8-bit",
+						 "JPEG format not supported: 8-bit only"); // JPEG baseline
+	s->img_y = stbi__get16be(s);
+	if (s->img_y == 0)
+		return stbi__err("no header height",
+						 "JPEG format not supported: delayed height"); // Legal, but we don't
+																	   // handle it--but
+																	   // neither does IJG
+	s->img_x = stbi__get16be(s);
+	if (s->img_x == 0)
+		return stbi__err("0 width", "Corrupt JPEG"); // JPEG requires
+	c = stbi__get8(s);
+	if (c != 3 && c != 1 && c != 4)
+		return stbi__err("bad component count", "Corrupt JPEG");
+	s->img_n = c;
+	for (i = 0; i < c; ++i) {
+		z->img_comp[i].data = NULL;
+		z->img_comp[i].linebuf = NULL;
+	}
+
+	if (Lf != 8 + 3 * s->img_n)
+		return stbi__err("bad SOF len", "Corrupt JPEG");
+
+	z->rgb = 0;
+	for (i = 0; i < s->img_n; ++i) {
+		static const unsigned char rgb[3] = {'R', 'G', 'B'};
+		z->img_comp[i].id = stbi__get8(s);
+		if (s->img_n == 3 && z->img_comp[i].id == rgb[i])
+			++z->rgb;
+		q = stbi__get8(s);
+		z->img_comp[i].h = (q >> 4);
+		if (!z->img_comp[i].h || z->img_comp[i].h > 4)
+			return stbi__err("bad H", "Corrupt JPEG");
+		z->img_comp[i].v = q & 15;
+		if (!z->img_comp[i].v || z->img_comp[i].v > 4)
+			return stbi__err("bad V", "Corrupt JPEG");
+		z->img_comp[i].tq = stbi__get8(s);
+		if (z->img_comp[i].tq > 3)
+			return stbi__err("bad TQ", "Corrupt JPEG");
+	}
+
+	if (scan != STBI__SCAN_load)
+		return 1;
+
+	if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0))
+		return stbi__err("too large", "Image too large to decode");
+
+	for (i = 0; i < s->img_n; ++i) {
+		if (z->img_comp[i].h > h_max)
+			h_max = z->img_comp[i].h;
+		if (z->img_comp[i].v > v_max)
+			v_max = z->img_comp[i].v;
+	}
+
+	// compute interleaved mcu info
+	z->img_h_max = h_max;
+	z->img_v_max = v_max;
+	z->img_mcu_w = h_max * 8;
+	z->img_mcu_h = v_max * 8;
+	// these sizes can't be more than 17 bits
+	z->img_mcu_x = (s->img_x + z->img_mcu_w - 1) / z->img_mcu_w;
+	z->img_mcu_y = (s->img_y + z->img_mcu_h - 1) / z->img_mcu_h;
+
+	for (i = 0; i < s->img_n; ++i) {
+		// number of effective pixels (e.g. for non-interleaved MCU)
+		z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max - 1) / h_max;
+		z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max - 1) / v_max;
+		// to simplify generation, we'll allocate enough memory to decode
+		// the bogus oversized data from using interleaved MCUs and their
+		// big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't
+		// discard the extra data until colorspace conversion
+		//
+		// img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked
+		// earlier) so these muls can't overflow with 32-bit ints (which we
+		// require)
+		z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8;
+		z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8;
+		z->img_comp[i].coeff = 0;
+		z->img_comp[i].raw_coeff = 0;
+		z->img_comp[i].linebuf = NULL;
+		z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15);
+		if (z->img_comp[i].raw_data == NULL)
+			return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory"));
+		// align blocks for idct using mmx/sse
+		z->img_comp[i].data = (stbi_uc*)(((size_t)z->img_comp[i].raw_data + 15) & ~15);
+		if (z->progressive) {
+			// w2, h2 are multiples of 8 (see above)
+			z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8;
+			z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8;
+			z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15);
+			if (z->img_comp[i].raw_coeff == NULL)
+				return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory"));
+			z->img_comp[i].coeff = (short*)(((size_t)z->img_comp[i].raw_coeff + 15) & ~15);
+		}
+	}
+
+	return 1;
+}
+
+// use comparisons since in some cases we handle more than one case (e.g. SOF)
+#define stbi__DNL(x) ((x) == 0xdc)
+#define stbi__SOI(x) ((x) == 0xd8)
+#define stbi__EOI(x) ((x) == 0xd9)
+#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2)
+#define stbi__SOS(x) ((x) == 0xda)
+
+#define stbi__SOF_progressive(x) ((x) == 0xc2)
+
+static int stbi__decode_jpeg_header(stbi__jpeg* z, int scan) {
+	int m;
+	z->jfif = 0;
+	z->app14_color_transform = -1; // valid values are 0,1,2
+	z->marker = STBI__MARKER_none; // initialize cached marker to empty
+	m = stbi__get_marker(z);
+	if (!stbi__SOI(m))
+		return stbi__err("no SOI", "Corrupt JPEG");
+	if (scan == STBI__SCAN_type)
+		return 1;
+	m = stbi__get_marker(z);
+	while (!stbi__SOF(m)) {
+		if (!stbi__process_marker(z, m))
+			return 0;
+		m = stbi__get_marker(z);
+		while (m == STBI__MARKER_none) {
+			// some files have extra padding after their blocks, so ok, we'll
+			// scan
+			if (stbi__at_eof(z->s))
+				return stbi__err("no SOF", "Corrupt JPEG");
+			m = stbi__get_marker(z);
+		}
+	}
+	z->progressive = stbi__SOF_progressive(m);
+	if (!stbi__process_frame_header(z, scan))
+		return 0;
+	return 1;
+}
+
+// decode image to YCbCr format
+static int stbi__decode_jpeg_image(stbi__jpeg* j) {
+	int m;
+	for (m = 0; m < 4; m++) {
+		j->img_comp[m].raw_data = NULL;
+		j->img_comp[m].raw_coeff = NULL;
+	}
+	j->restart_interval = 0;
+	if (!stbi__decode_jpeg_header(j, STBI__SCAN_load))
+		return 0;
+	m = stbi__get_marker(j);
+	while (!stbi__EOI(m)) {
+		if (stbi__SOS(m)) {
+			if (!stbi__process_scan_header(j))
+				return 0;
+			if (!stbi__parse_entropy_coded_data(j))
+				return 0;
+			if (j->marker == STBI__MARKER_none) {
+				// handle 0s at the end of image data from IP Kamera 9060
+				while (!stbi__at_eof(j->s)) {
+					int x = stbi__get8(j->s);
+					if (x == 255) {
+						j->marker = stbi__get8(j->s);
+						break;
+					}
+				}
+				// if we reach eof without hitting a marker, stbi__get_marker()
+				// below will fail and we'll eventually return 0
+			}
+		} else if (stbi__DNL(m)) {
+			int Ld = stbi__get16be(j->s);
+			stbi__uint32 NL = stbi__get16be(j->s);
+			if (Ld != 4)
+				return stbi__err("bad DNL len", "Corrupt JPEG");
+			if (NL != j->s->img_y)
+				return stbi__err("bad DNL height", "Corrupt JPEG");
+		} else {
+			if (!stbi__process_marker(j, m))
+				return 0;
+		}
+		m = stbi__get_marker(j);
+	}
+	if (j->progressive)
+		stbi__jpeg_finish(j);
+	return 1;
+}
+
+// static jfif-centered resampling (across block boundaries)
+
+typedef stbi_uc* (*resample_row_func)(stbi_uc* out, stbi_uc* in0, stbi_uc* in1, int w, int hs);
+
+#define stbi__div4(x) ((stbi_uc)((x) >> 2))
+
+static stbi_uc* resample_row_1(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
+	STBI_NOTUSED(out);
+	STBI_NOTUSED(in_far);
+	STBI_NOTUSED(w);
+	STBI_NOTUSED(hs);
+	return in_near;
+}
+
+static stbi_uc* stbi__resample_row_v_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
+	// need to generate two samples vertically for every one in input
+	int i;
+	STBI_NOTUSED(hs);
+	for (i = 0; i < w; ++i)
+		out[i] = stbi__div4(3 * in_near[i] + in_far[i] + 2);
+	return out;
+}
+
+static stbi_uc* stbi__resample_row_h_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
+	// need to generate two samples horizontally for every one in input
+	int i;
+	stbi_uc* input = in_near;
+
+	if (w == 1) {
+		// if only one sample, can't do any interpolation
+		out[0] = out[1] = input[0];
+		return out;
+	}
+
+	out[0] = input[0];
+	out[1] = stbi__div4(input[0] * 3 + input[1] + 2);
+	for (i = 1; i < w - 1; ++i) {
+		int n = 3 * input[i] + 2;
+		out[i * 2 + 0] = stbi__div4(n + input[i - 1]);
+		out[i * 2 + 1] = stbi__div4(n + input[i + 1]);
+	}
+	out[i * 2 + 0] = stbi__div4(input[w - 2] * 3 + input[w - 1] + 2);
+	out[i * 2 + 1] = input[w - 1];
+
+	STBI_NOTUSED(in_far);
+	STBI_NOTUSED(hs);
+
+	return out;
+}
+
+#define stbi__div16(x) ((stbi_uc)((x) >> 4))
+
+static stbi_uc* stbi__resample_row_hv_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
+	// need to generate 2x2 samples for every one in input
+	int i, t0, t1;
+	if (w == 1) {
+		out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2);
+		return out;
+	}
+
+	t1 = 3 * in_near[0] + in_far[0];
+	out[0] = stbi__div4(t1 + 2);
+	for (i = 1; i < w; ++i) {
+		t0 = t1;
+		t1 = 3 * in_near[i] + in_far[i];
+		out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8);
+		out[i * 2] = stbi__div16(3 * t1 + t0 + 8);
+	}
+	out[w * 2 - 1] = stbi__div4(t1 + 2);
+
+	STBI_NOTUSED(hs);
+
+	return out;
+}
+
+#if defined(STBI_SSE2) || defined(STBI_NEON)
+static stbi_uc* stbi__resample_row_hv_2_simd(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
+	// need to generate 2x2 samples for every one in input
+	int i = 0, t0, t1;
+
+	if (w == 1) {
+		out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2);
+		return out;
+	}
+
+	t1 = 3 * in_near[0] + in_far[0];
+	// process groups of 8 pixels for as long as we can.
+	// note we can't handle the last pixel in a row in this loop
+	// because we need to handle the filter boundary conditions.
+	for (; i < ((w - 1) & ~7); i += 8) {
+#if defined(STBI_SSE2)
+		// load and perform the vertical filtering pass
+		// this uses 3*x + y = 4*x + (y - x)
+		__m128i zero = _mm_setzero_si128();
+		__m128i farb = _mm_loadl_epi64((__m128i*)(in_far + i));
+		__m128i nearb = _mm_loadl_epi64((__m128i*)(in_near + i));
+		__m128i farw = _mm_unpacklo_epi8(farb, zero);
+		__m128i nearw = _mm_unpacklo_epi8(nearb, zero);
+		__m128i diff = _mm_sub_epi16(farw, nearw);
+		__m128i nears = _mm_slli_epi16(nearw, 2);
+		__m128i curr = _mm_add_epi16(nears, diff); // current row
+
+		// horizontal filter works the same based on shifted vers of current
+		// row. "prev" is current row shifted right by 1 pixel; we need to
+		// insert the previous pixel value (from t1).
+		// "next" is current row shifted left by 1 pixel, with first pixel
+		// of next block of 8 pixels added in.
+		__m128i prv0 = _mm_slli_si128(curr, 2);
+		__m128i nxt0 = _mm_srli_si128(curr, 2);
+		__m128i prev = _mm_insert_epi16(prv0, t1, 0);
+		__m128i next = _mm_insert_epi16(nxt0, 3 * in_near[i + 8] + in_far[i + 8], 7);
+
+		// horizontal filter, polyphase implementation since it's convenient:
+		// even pixels = 3*cur + prev = cur*4 + (prev - cur)
+		// odd  pixels = 3*cur + next = cur*4 + (next - cur)
+		// note the shared term.
+		__m128i bias = _mm_set1_epi16(8);
+		__m128i curs = _mm_slli_epi16(curr, 2);
+		__m128i prvd = _mm_sub_epi16(prev, curr);
+		__m128i nxtd = _mm_sub_epi16(next, curr);
+		__m128i curb = _mm_add_epi16(curs, bias);
+		__m128i even = _mm_add_epi16(prvd, curb);
+		__m128i odd = _mm_add_epi16(nxtd, curb);
+
+		// interleave even and odd pixels, then undo scaling.
+		__m128i int0 = _mm_unpacklo_epi16(even, odd);
+		__m128i int1 = _mm_unpackhi_epi16(even, odd);
+		__m128i de0 = _mm_srli_epi16(int0, 4);
+		__m128i de1 = _mm_srli_epi16(int1, 4);
+
+		// pack and write output
+		__m128i outv = _mm_packus_epi16(de0, de1);
+		_mm_storeu_si128((__m128i*)(out + i * 2), outv);
+#elif defined(STBI_NEON)
+		// load and perform the vertical filtering pass
+		// this uses 3*x + y = 4*x + (y - x)
+		uint8x8_t farb = vld1_u8(in_far + i);
+		uint8x8_t nearb = vld1_u8(in_near + i);
+		int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb));
+		int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2));
+		int16x8_t curr = vaddq_s16(nears, diff); // current row
+
+		// horizontal filter works the same based on shifted vers of current
+		// row. "prev" is current row shifted right by 1 pixel; we need to
+		// insert the previous pixel value (from t1).
+		// "next" is current row shifted left by 1 pixel, with first pixel
+		// of next block of 8 pixels added in.
+		int16x8_t prv0 = vextq_s16(curr, curr, 7);
+		int16x8_t nxt0 = vextq_s16(curr, curr, 1);
+		int16x8_t prev = vsetq_lane_s16(t1, prv0, 0);
+		int16x8_t next = vsetq_lane_s16(3 * in_near[i + 8] + in_far[i + 8], nxt0, 7);
+
+		// horizontal filter, polyphase implementation since it's convenient:
+		// even pixels = 3*cur + prev = cur*4 + (prev - cur)
+		// odd  pixels = 3*cur + next = cur*4 + (next - cur)
+		// note the shared term.
+		int16x8_t curs = vshlq_n_s16(curr, 2);
+		int16x8_t prvd = vsubq_s16(prev, curr);
+		int16x8_t nxtd = vsubq_s16(next, curr);
+		int16x8_t even = vaddq_s16(curs, prvd);
+		int16x8_t odd = vaddq_s16(curs, nxtd);
+
+		// undo scaling and round, then store with even/odd phases interleaved
+		uint8x8x2_t o;
+		o.val[0] = vqrshrun_n_s16(even, 4);
+		o.val[1] = vqrshrun_n_s16(odd, 4);
+		vst2_u8(out + i * 2, o);
+#endif
+
+		// "previous" value for next iter
+		t1 = 3 * in_near[i + 7] + in_far[i + 7];
+	}
+
+	t0 = t1;
+	t1 = 3 * in_near[i] + in_far[i];
+	out[i * 2] = stbi__div16(3 * t1 + t0 + 8);
+
+	for (++i; i < w; ++i) {
+		t0 = t1;
+		t1 = 3 * in_near[i] + in_far[i];
+		out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8);
+		out[i * 2] = stbi__div16(3 * t1 + t0 + 8);
+	}
+	out[w * 2 - 1] = stbi__div4(t1 + 2);
+
+	STBI_NOTUSED(hs);
+
+	return out;
+}
+#endif
+
+static stbi_uc* stbi__resample_row_generic(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
+	// resample with nearest-neighbor
+	int i, j;
+	STBI_NOTUSED(in_far);
+	for (i = 0; i < w; ++i)
+		for (j = 0; j < hs; ++j)
+			out[i * hs + j] = in_near[i];
+	return out;
+}
+
+// this is a reduced-precision calculation of YCbCr-to-RGB introduced
+// to make sure the code produces the same results in both SIMD and scalar
+#define stbi__float2fixed(x) (((int)((x)*4096.0f + 0.5f)) << 8)
+static void stbi__YCbCr_to_RGB_row(stbi_uc* out, const stbi_uc* y, const stbi_uc* pcb, const stbi_uc* pcr, int count, int step) {
+	int i;
+	for (i = 0; i < count; ++i) {
+		int y_fixed = (y[i] << 20) + (1 << 19); // rounding
+		int r, g, b;
+		int cr = pcr[i] - 128;
+		int cb = pcb[i] - 128;
+		r = y_fixed + cr * stbi__float2fixed(1.40200f);
+		g = y_fixed + (cr * -stbi__float2fixed(0.71414f)) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000);
+		b = y_fixed + cb * stbi__float2fixed(1.77200f);
+		r >>= 20;
+		g >>= 20;
+		b >>= 20;
+		if ((unsigned)r > 255) {
+			if (r < 0)
+				r = 0;
+			else
+				r = 255;
+		}
+		if ((unsigned)g > 255) {
+			if (g < 0)
+				g = 0;
+			else
+				g = 255;
+		}
+		if ((unsigned)b > 255) {
+			if (b < 0)
+				b = 0;
+			else
+				b = 255;
+		}
+		out[0] = (stbi_uc)r;
+		out[1] = (stbi_uc)g;
+		out[2] = (stbi_uc)b;
+		out[3] = 255;
+		out += step;
+	}
+}
+
+#if defined(STBI_SSE2) || defined(STBI_NEON)
+static void stbi__YCbCr_to_RGB_simd(stbi_uc* out, stbi_uc const* y, stbi_uc const* pcb, stbi_uc const* pcr, int count, int step) {
+	int i = 0;
+
+#ifdef STBI_SSE2
+	// step == 3 is pretty ugly on the final interleave, and i'm not convinced
+	// it's useful in practice (you wouldn't use it for textures, for example).
+	// so just accelerate step == 4 case.
+	if (step == 4) {
+		// this is a fairly straightforward implementation and not
+		// super-optimized.
+		__m128i signflip = _mm_set1_epi8(-0x80);
+		__m128i cr_const0 = _mm_set1_epi16((short)(1.40200f * 4096.0f + 0.5f));
+		__m128i cr_const1 = _mm_set1_epi16(-(short)(0.71414f * 4096.0f + 0.5f));
+		__m128i cb_const0 = _mm_set1_epi16(-(short)(0.34414f * 4096.0f + 0.5f));
+		__m128i cb_const1 = _mm_set1_epi16((short)(1.77200f * 4096.0f + 0.5f));
+		__m128i y_bias = _mm_set1_epi8((char)(unsigned char)128);
+		__m128i xw = _mm_set1_epi16(255); // alpha channel
+
+		for (; i + 7 < count; i += 8) {
+			// load
+			__m128i y_bytes = _mm_loadl_epi64((__m128i*)(y + i));
+			__m128i cr_bytes = _mm_loadl_epi64((__m128i*)(pcr + i));
+			__m128i cb_bytes = _mm_loadl_epi64((__m128i*)(pcb + i));
+			__m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128
+			__m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128
+
+			// unpack to short (and left-shift cr, cb by 8)
+			__m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes);
+			__m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased);
+			__m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased);
+
+			// color transform
+			__m128i yws = _mm_srli_epi16(yw, 4);
+			__m128i cr0 = _mm_mulhi_epi16(cr_const0, crw);
+			__m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw);
+			__m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1);
+			__m128i cr1 = _mm_mulhi_epi16(crw, cr_const1);
+			__m128i rws = _mm_add_epi16(cr0, yws);
+			__m128i gwt = _mm_add_epi16(cb0, yws);
+			__m128i bws = _mm_add_epi16(yws, cb1);
+			__m128i gws = _mm_add_epi16(gwt, cr1);
+
+			// descale
+			__m128i rw = _mm_srai_epi16(rws, 4);
+			__m128i bw = _mm_srai_epi16(bws, 4);
+			__m128i gw = _mm_srai_epi16(gws, 4);
+
+			// back to byte, set up for transpose
+			__m128i brb = _mm_packus_epi16(rw, bw);
+			__m128i gxb = _mm_packus_epi16(gw, xw);
+
+			// transpose to interleave channels
+			__m128i t0 = _mm_unpacklo_epi8(brb, gxb);
+			__m128i t1 = _mm_unpackhi_epi8(brb, gxb);
+			__m128i o0 = _mm_unpacklo_epi16(t0, t1);
+			__m128i o1 = _mm_unpackhi_epi16(t0, t1);
+
+			// store
+			_mm_storeu_si128((__m128i*)(out + 0), o0);
+			_mm_storeu_si128((__m128i*)(out + 16), o1);
+			out += 32;
+		}
+	}
+#endif
+
+#ifdef STBI_NEON
+	// in this version, step=3 support would be easy to add. but is there
+	// demand?
+	if (step == 4) {
+		// this is a fairly straightforward implementation and not
+		// super-optimized.
+		uint8x8_t signflip = vdup_n_u8(0x80);
+		int16x8_t cr_const0 = vdupq_n_s16((short)(1.40200f * 4096.0f + 0.5f));
+		int16x8_t cr_const1 = vdupq_n_s16(-(short)(0.71414f * 4096.0f + 0.5f));
+		int16x8_t cb_const0 = vdupq_n_s16(-(short)(0.34414f * 4096.0f + 0.5f));
+		int16x8_t cb_const1 = vdupq_n_s16((short)(1.77200f * 4096.0f + 0.5f));
+
+		for (; i + 7 < count; i += 8) {
+			// load
+			uint8x8_t y_bytes = vld1_u8(y + i);
+			uint8x8_t cr_bytes = vld1_u8(pcr + i);
+			uint8x8_t cb_bytes = vld1_u8(pcb + i);
+			int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip));
+			int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip));
+
+			// expand to s16
+			int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4));
+			int16x8_t crw = vshll_n_s8(cr_biased, 7);
+			int16x8_t cbw = vshll_n_s8(cb_biased, 7);
+
+			// color transform
+			int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0);
+			int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0);
+			int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1);
+			int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1);
+			int16x8_t rws = vaddq_s16(yws, cr0);
+			int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1);
+			int16x8_t bws = vaddq_s16(yws, cb1);
+
+			// undo scaling, round, convert to byte
+			uint8x8x4_t o;
+			o.val[0] = vqrshrun_n_s16(rws, 4);
+			o.val[1] = vqrshrun_n_s16(gws, 4);
+			o.val[2] = vqrshrun_n_s16(bws, 4);
+			o.val[3] = vdup_n_u8(255);
+
+			// store, interleaving r/g/b/a
+			vst4_u8(out, o);
+			out += 8 * 4;
+		}
+	}
+#endif
+
+	for (; i < count; ++i) {
+		int y_fixed = (y[i] << 20) + (1 << 19); // rounding
+		int r, g, b;
+		int cr = pcr[i] - 128;
+		int cb = pcb[i] - 128;
+		r = y_fixed + cr * stbi__float2fixed(1.40200f);
+		g = y_fixed + cr * -stbi__float2fixed(0.71414f) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000);
+		b = y_fixed + cb * stbi__float2fixed(1.77200f);
+		r >>= 20;
+		g >>= 20;
+		b >>= 20;
+		if ((unsigned)r > 255) {
+			if (r < 0)
+				r = 0;
+			else
+				r = 255;
+		}
+		if ((unsigned)g > 255) {
+			if (g < 0)
+				g = 0;
+			else
+				g = 255;
+		}
+		if ((unsigned)b > 255) {
+			if (b < 0)
+				b = 0;
+			else
+				b = 255;
+		}
+		out[0] = (stbi_uc)r;
+		out[1] = (stbi_uc)g;
+		out[2] = (stbi_uc)b;
+		out[3] = 255;
+		out += step;
+	}
+}
+#endif
+
+// set up the kernels
+static void stbi__setup_jpeg(stbi__jpeg* j) {
+	j->idct_block_kernel = stbi__idct_block;
+	j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row;
+	j->resample_row_hv_2_kernel = stbi__resample_row_hv_2;
+
+#ifdef STBI_SSE2
+	if (stbi__sse2_available()) {
+		j->idct_block_kernel = stbi__idct_simd;
+		j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
+		j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
+	}
+#endif
+
+#ifdef STBI_NEON
+	j->idct_block_kernel = stbi__idct_simd;
+	j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
+	j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
+#endif
+}
+
+// clean up the temporary component buffers
+static void stbi__cleanup_jpeg(stbi__jpeg* j) { stbi__free_jpeg_components(j, j->s->img_n, 0); }
+
+typedef struct {
+	resample_row_func resample;
+	stbi_uc *line0, *line1;
+	int hs, vs;  // expansion factor in each axis
+	int w_lores; // horizontal pixels pre-expansion
+	int ystep;   // how far through vertical expansion we are
+	int ypos;	// which pre-expansion row we're on
+} stbi__resample;
+
+// fast 0..255 * 0..255 => 0..255 rounded multiplication
+static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) {
+	unsigned int t = x * y + 128;
+	return (stbi_uc)((t + (t >> 8)) >> 8);
+}
+
+static stbi_uc* load_jpeg_image(stbi__jpeg* z, int* out_x, int* out_y, int* comp, int req_comp) {
+	int n, decode_n, is_rgb;
+	z->s->img_n = 0; // make stbi__cleanup_jpeg safe
+
+	// validate req_comp
+	if (req_comp < 0 || req_comp > 4)
+		return stbi__errpuc("bad req_comp", "Internal error");
+
+	// load a jpeg image from whichever source, but leave in YCbCr format
+	if (!stbi__decode_jpeg_image(z)) {
+		stbi__cleanup_jpeg(z);
+		return NULL;
+	}
+
+	// determine actual number of components to generate
+	n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1;
+
+	is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif));
+
+	if (z->s->img_n == 3 && n < 3 && !is_rgb)
+		decode_n = 1;
+	else
+		decode_n = z->s->img_n;
+
+	// resample and color-convert
+	{
+		int k;
+		unsigned int i, j;
+		stbi_uc* output;
+		stbi_uc* coutput[4] = {NULL, NULL, NULL, NULL};
+
+		stbi__resample res_comp[4];
+
+		for (k = 0; k < decode_n; ++k) {
+			stbi__resample* r = &res_comp[k];
+
+			// allocate line buffer big enough for upsampling off the edges
+			// with upsample factor of 4
+			z->img_comp[k].linebuf = (stbi_uc*)stbi__malloc(z->s->img_x + 3);
+			if (!z->img_comp[k].linebuf) {
+				stbi__cleanup_jpeg(z);
+				return stbi__errpuc("outofmem", "Out of memory");
+			}
+
+			r->hs = z->img_h_max / z->img_comp[k].h;
+			r->vs = z->img_v_max / z->img_comp[k].v;
+			r->ystep = r->vs >> 1;
+			r->w_lores = (z->s->img_x + r->hs - 1) / r->hs;
+			r->ypos = 0;
+			r->line0 = r->line1 = z->img_comp[k].data;
+
+			if (r->hs == 1 && r->vs == 1)
+				r->resample = resample_row_1;
+			else if (r->hs == 1 && r->vs == 2)
+				r->resample = stbi__resample_row_v_2;
+			else if (r->hs == 2 && r->vs == 1)
+				r->resample = stbi__resample_row_h_2;
+			else if (r->hs == 2 && r->vs == 2)
+				r->resample = z->resample_row_hv_2_kernel;
+			else
+				r->resample = stbi__resample_row_generic;
+		}
+
+		// can't error after this so, this is safe
+		output = (stbi_uc*)stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1);
+		if (!output) {
+			stbi__cleanup_jpeg(z);
+			return stbi__errpuc("outofmem", "Out of memory");
+		}
+
+		// now go ahead and resample
+		for (j = 0; j < z->s->img_y; ++j) {
+			stbi_uc* out = output + n * z->s->img_x * j;
+			for (k = 0; k < decode_n; ++k) {
+				stbi__resample* r = &res_comp[k];
+				int y_bot = r->ystep >= (r->vs >> 1);
+				coutput[k] = r->resample(z->img_comp[k].linebuf, y_bot ? r->line1 : r->line0, y_bot ? r->line0 : r->line1, r->w_lores, r->hs);
+				if (++r->ystep >= r->vs) {
+					r->ystep = 0;
+					r->line0 = r->line1;
+					if (++r->ypos < z->img_comp[k].y)
+						r->line1 += z->img_comp[k].w2;
+				}
+			}
+			if (n >= 3) {
+				stbi_uc* y = coutput[0];
+				if (z->s->img_n == 3) {
+					if (is_rgb) {
+						for (i = 0; i < z->s->img_x; ++i) {
+							out[0] = y[i];
+							out[1] = coutput[1][i];
+							out[2] = coutput[2][i];
+							out[3] = 255;
+							out += n;
+						}
+					} else {
+						z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
+					}
+				} else if (z->s->img_n == 4) {
+					if (z->app14_color_transform == 0) { // CMYK
+						for (i = 0; i < z->s->img_x; ++i) {
+							stbi_uc m = coutput[3][i];
+							out[0] = stbi__blinn_8x8(coutput[0][i], m);
+							out[1] = stbi__blinn_8x8(coutput[1][i], m);
+							out[2] = stbi__blinn_8x8(coutput[2][i], m);
+							out[3] = 255;
+							out += n;
+						}
+					} else if (z->app14_color_transform == 2) { // YCCK
+						z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
+						for (i = 0; i < z->s->img_x; ++i) {
+							stbi_uc m = coutput[3][i];
+							out[0] = stbi__blinn_8x8(255 - out[0], m);
+							out[1] = stbi__blinn_8x8(255 - out[1], m);
+							out[2] = stbi__blinn_8x8(255 - out[2], m);
+							out += n;
+						}
+					} else { // YCbCr + alpha?  Ignore the fourth channel for
+							 // now
+						z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
+					}
+				} else
+					for (i = 0; i < z->s->img_x; ++i) {
+						out[0] = out[1] = out[2] = y[i];
+						out[3] = 255; // not used if n==3
+						out += n;
+					}
+			} else {
+				if (is_rgb) {
+					if (n == 1)
+						for (i = 0; i < z->s->img_x; ++i)
+							*out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
+					else {
+						for (i = 0; i < z->s->img_x; ++i, out += 2) {
+							out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
+							out[1] = 255;
+						}
+					}
+				} else if (z->s->img_n == 4 && z->app14_color_transform == 0) {
+					for (i = 0; i < z->s->img_x; ++i) {
+						stbi_uc m = coutput[3][i];
+						stbi_uc r = stbi__blinn_8x8(coutput[0][i], m);
+						stbi_uc g = stbi__blinn_8x8(coutput[1][i], m);
+						stbi_uc b = stbi__blinn_8x8(coutput[2][i], m);
+						out[0] = stbi__compute_y(r, g, b);
+						out[1] = 255;
+						out += n;
+					}
+				} else if (z->s->img_n == 4 && z->app14_color_transform == 2) {
+					for (i = 0; i < z->s->img_x; ++i) {
+						out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]);
+						out[1] = 255;
+						out += n;
+					}
+				} else {
+					stbi_uc* y = coutput[0];
+					if (n == 1)
+						for (i = 0; i < z->s->img_x; ++i)
+							out[i] = y[i];
+					else
+						for (i = 0; i < z->s->img_x; ++i) {
+							*out++ = y[i];
+							*out++ = 255;
+						}
+				}
+			}
+		}
+		stbi__cleanup_jpeg(z);
+		*out_x = z->s->img_x;
+		*out_y = z->s->img_y;
+		if (comp)
+			*comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output
+		return output;
+	}
+}
+
+static void* stbi__jpeg_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
+	unsigned char* result;
+	stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
+	STBI_NOTUSED(ri);
+	j->s = s;
+	stbi__setup_jpeg(j);
+	result = load_jpeg_image(j, x, y, comp, req_comp);
+	STBI_FREE(j);
+	return result;
+}
+
+static int stbi__jpeg_test(stbi__context* s) {
+	int r;
+	stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
+	j->s = s;
+	stbi__setup_jpeg(j);
+	r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
+	stbi__rewind(s);
+	STBI_FREE(j);
+	return r;
+}
+
+static int stbi__jpeg_info_raw(stbi__jpeg* j, int* x, int* y, int* comp) {
+	if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) {
+		stbi__rewind(j->s);
+		return 0;
+	}
+	if (x)
+		*x = j->s->img_x;
+	if (y)
+		*y = j->s->img_y;
+	if (comp)
+		*comp = j->s->img_n >= 3 ? 3 : 1;
+	return 1;
+}
+
+static int stbi__jpeg_info(stbi__context* s, int* x, int* y, int* comp) {
+	int result;
+	stbi__jpeg* j = (stbi__jpeg*)(stbi__malloc(sizeof(stbi__jpeg)));
+	j->s = s;
+	result = stbi__jpeg_info_raw(j, x, y, comp);
+	STBI_FREE(j);
+	return result;
+}
+#endif
+
+// public domain zlib decode    v0.2  Sean Barrett 2006-11-18
+//    simple implementation
+//      - all input must be provided in an upfront buffer
+//      - all output is written to a single output buffer (can malloc/realloc)
+//    performance
+//      - fast huffman
+
+#ifndef STBI_NO_ZLIB
+
+// fast-way is faster to check than jpeg huffman, but slow way is slower
+#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables
+#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1)
+
+// zlib-style huffman encoding
+// (jpegs packs from left, zlib from right, so can't share code)
+typedef struct {
+	stbi__uint16 fast[1 << STBI__ZFAST_BITS];
+	stbi__uint16 firstcode[16];
+	int maxcode[17];
+	stbi__uint16 firstsymbol[16];
+	stbi_uc size[288];
+	stbi__uint16 value[288];
+} stbi__zhuffman;
+
+stbi_inline static int stbi__bitreverse16(int n) {
+	n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1);
+	n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2);
+	n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4);
+	n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8);
+	return n;
+}
+
+stbi_inline static int stbi__bit_reverse(int v, int bits) {
+	STBI_ASSERT(bits <= 16);
+	// to bit reverse n bits, reverse 16 and shift
+	// e.g. 11 bits, bit reverse and shift away 5
+	return stbi__bitreverse16(v) >> (16 - bits);
+}
+
+static int stbi__zbuild_huffman(stbi__zhuffman* z, const stbi_uc* sizelist, int num) {
+	int i, k = 0;
+	int code, next_code[16], sizes[17];
+
+	// DEFLATE spec for generating codes
+	memset(sizes, 0, sizeof(sizes));
+	memset(z->fast, 0, sizeof(z->fast));
+	for (i = 0; i < num; ++i)
+		++sizes[sizelist[i]];
+	sizes[0] = 0;
+	for (i = 1; i < 16; ++i)
+		if (sizes[i] > (1 << i))
+			return stbi__err("bad sizes", "Corrupt PNG");
+	code = 0;
+	for (i = 1; i < 16; ++i) {
+		next_code[i] = code;
+		z->firstcode[i] = (stbi__uint16)code;
+		z->firstsymbol[i] = (stbi__uint16)k;
+		code = (code + sizes[i]);
+		if (sizes[i])
+			if (code - 1 >= (1 << i))
+				return stbi__err("bad codelengths", "Corrupt PNG");
+		z->maxcode[i] = code << (16 - i); // preshift for inner loop
+		code <<= 1;
+		k += sizes[i];
+	}
+	z->maxcode[16] = 0x10000; // sentinel
+	for (i = 0; i < num; ++i) {
+		int s = sizelist[i];
+		if (s) {
+			int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
+			stbi__uint16 fastv = (stbi__uint16)((s << 9) | i);
+			z->size[c] = (stbi_uc)s;
+			z->value[c] = (stbi__uint16)i;
+			if (s <= STBI__ZFAST_BITS) {
+				int j = stbi__bit_reverse(next_code[s], s);
+				while (j < (1 << STBI__ZFAST_BITS)) {
+					z->fast[j] = fastv;
+					j += (1 << s);
+				}
+			}
+			++next_code[s];
+		}
+	}
+	return 1;
+}
+
+// zlib-from-memory implementation for PNG reading
+//    because PNG allows splitting the zlib stream arbitrarily,
+//    and it's annoying structurally to have PNG call ZLIB call PNG,
+//    we require PNG read all the IDATs and combine them into a single
+//    memory buffer
+
+typedef struct {
+	stbi_uc *zbuffer, *zbuffer_end;
+	int num_bits;
+	stbi__uint32 code_buffer;
+
+	char* zout;
+	char* zout_start;
+	char* zout_end;
+	int z_expandable;
+
+	stbi__zhuffman z_length, z_distance;
+} stbi__zbuf;
+
+stbi_inline static stbi_uc stbi__zget8(stbi__zbuf* z) {
+	if (z->zbuffer >= z->zbuffer_end)
+		return 0;
+	return *z->zbuffer++;
+}
+
+static void stbi__fill_bits(stbi__zbuf* z) {
+	do {
+		STBI_ASSERT(z->code_buffer < (1U << z->num_bits));
+		z->code_buffer |= (unsigned int)stbi__zget8(z) << z->num_bits;
+		z->num_bits += 8;
+	} while (z->num_bits <= 24);
+}
+
+stbi_inline static unsigned int stbi__zreceive(stbi__zbuf* z, int n) {
+	unsigned int k;
+	if (z->num_bits < n)
+		stbi__fill_bits(z);
+	k = z->code_buffer & ((1 << n) - 1);
+	z->code_buffer >>= n;
+	z->num_bits -= n;
+	return k;
+}
+
+static int stbi__zhuffman_decode_slowpath(stbi__zbuf* a, stbi__zhuffman* z) {
+	int b, s, k;
+	// not resolved by fast table, so compute it the slow way
+	// use jpeg approach, which requires MSbits at top
+	k = stbi__bit_reverse(a->code_buffer, 16);
+	for (s = STBI__ZFAST_BITS + 1;; ++s)
+		if (k < z->maxcode[s])
+			break;
+	if (s == 16)
+		return -1; // invalid code!
+	// code size is s, so:
+	b = (k >> (16 - s)) - z->firstcode[s] + z->firstsymbol[s];
+	STBI_ASSERT(z->size[b] == s);
+	a->code_buffer >>= s;
+	a->num_bits -= s;
+	return z->value[b];
+}
+
+stbi_inline static int stbi__zhuffman_decode(stbi__zbuf* a, stbi__zhuffman* z) {
+	int b, s;
+	if (a->num_bits < 16)
+		stbi__fill_bits(a);
+	b = z->fast[a->code_buffer & STBI__ZFAST_MASK];
+	if (b) {
+		s = b >> 9;
+		a->code_buffer >>= s;
+		a->num_bits -= s;
+		return b & 511;
+	}
+	return stbi__zhuffman_decode_slowpath(a, z);
+}
+
+static int stbi__zexpand(stbi__zbuf* z, char* zout,
+						 int n) // need to make room for n bytes
+{
+	char* q;
+	int cur, limit, old_limit;
+	z->zout = zout;
+	if (!z->z_expandable)
+		return stbi__err("output buffer limit", "Corrupt PNG");
+	cur = (int)(z->zout - z->zout_start);
+	limit = old_limit = (int)(z->zout_end - z->zout_start);
+	while (cur + n > limit)
+		limit *= 2;
+	q = (char*)STBI_REALLOC_SIZED(z->zout_start, old_limit, limit);
+	STBI_NOTUSED(old_limit);
+	if (q == NULL)
+		return stbi__err("outofmem", "Out of memory");
+	z->zout_start = q;
+	z->zout = q + cur;
+	z->zout_end = q + limit;
+	return 1;
+}
+
+static const int stbi__zlength_base[31] = {3,  4,  5,  6,  7,  8,  9,  10,  11,  13,  15,  17,  19,  23, 27, 31,
+										   35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0,  0};
+
+static const int stbi__zlength_extra[31] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 0, 0};
+
+static const int stbi__zdist_base[32] = {1,   2,   3,   4,   5,	7,	9,	13,   17,   25,   33,   49,	65,	97,	129, 193,
+										 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 0,   0};
+
+static const int stbi__zdist_extra[32] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
+
+static int stbi__parse_huffman_block(stbi__zbuf* a) {
+	char* zout = a->zout;
+	for (;;) {
+		int z = stbi__zhuffman_decode(a, &a->z_length);
+		if (z < 256) {
+			if (z < 0)
+				return stbi__err("bad huffman code",
+								 "Corrupt PNG"); // error in huffman codes
+			if (zout >= a->zout_end) {
+				if (!stbi__zexpand(a, zout, 1))
+					return 0;
+				zout = a->zout;
+			}
+			*zout++ = (char)z;
+		} else {
+			stbi_uc* p;
+			int len, dist;
+			if (z == 256) {
+				a->zout = zout;
+				return 1;
+			}
+			z -= 257;
+			len = stbi__zlength_base[z];
+			if (stbi__zlength_extra[z])
+				len += stbi__zreceive(a, stbi__zlength_extra[z]);
+			z = stbi__zhuffman_decode(a, &a->z_distance);
+			if (z < 0)
+				return stbi__err("bad huffman code", "Corrupt PNG");
+			dist = stbi__zdist_base[z];
+			if (stbi__zdist_extra[z])
+				dist += stbi__zreceive(a, stbi__zdist_extra[z]);
+			if (zout - a->zout_start < dist)
+				return stbi__err("bad dist", "Corrupt PNG");
+			if (zout + len > a->zout_end) {
+				if (!stbi__zexpand(a, zout, len))
+					return 0;
+				zout = a->zout;
+			}
+			p = (stbi_uc*)(zout - dist);
+			if (dist == 1) { // run of one byte; common in images.
+				stbi_uc v = *p;
+				if (len) {
+					do
+						*zout++ = v;
+					while (--len);
+				}
+			} else {
+				if (len) {
+					do
+						*zout++ = *p++;
+					while (--len);
+				}
+			}
+		}
+	}
+}
+
+static int stbi__compute_huffman_codes(stbi__zbuf* a) {
+	static const stbi_uc length_dezigzag[19] = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+	stbi__zhuffman z_codelength;
+	stbi_uc lencodes[286 + 32 + 137]; // padding for maximum single op
+	stbi_uc codelength_sizes[19];
+	int i, n;
+
+	int hlit = stbi__zreceive(a, 5) + 257;
+	int hdist = stbi__zreceive(a, 5) + 1;
+	int hclen = stbi__zreceive(a, 4) + 4;
+	int ntot = hlit + hdist;
+
+	memset(codelength_sizes, 0, sizeof(codelength_sizes));
+	for (i = 0; i < hclen; ++i) {
+		int s = stbi__zreceive(a, 3);
+		codelength_sizes[length_dezigzag[i]] = (stbi_uc)s;
+	}
+	if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19))
+		return 0;
+
+	n = 0;
+	while (n < ntot) {
+		int c = stbi__zhuffman_decode(a, &z_codelength);
+		if (c < 0 || c >= 19)
+			return stbi__err("bad codelengths", "Corrupt PNG");
+		if (c < 16)
+			lencodes[n++] = (stbi_uc)c;
+		else {
+			stbi_uc fill = 0;
+			if (c == 16) {
+				c = stbi__zreceive(a, 2) + 3;
+				if (n == 0)
+					return stbi__err("bad codelengths", "Corrupt PNG");
+				fill = lencodes[n - 1];
+			} else if (c == 17)
+				c = stbi__zreceive(a, 3) + 3;
+			else {
+				STBI_ASSERT(c == 18);
+				c = stbi__zreceive(a, 7) + 11;
+			}
+			if (ntot - n < c)
+				return stbi__err("bad codelengths", "Corrupt PNG");
+			memset(lencodes + n, fill, c);
+			n += c;
+		}
+	}
+	if (n != ntot)
+		return stbi__err("bad codelengths", "Corrupt PNG");
+	if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit))
+		return 0;
+	if (!stbi__zbuild_huffman(&a->z_distance, lencodes + hlit, hdist))
+		return 0;
+	return 1;
+}
+
+static int stbi__parse_uncompressed_block(stbi__zbuf* a) {
+	stbi_uc header[4];
+	int len, nlen, k;
+	if (a->num_bits & 7)
+		stbi__zreceive(a, a->num_bits & 7); // discard
+	// drain the bit-packed data into header
+	k = 0;
+	while (a->num_bits > 0) {
+		header[k++] = (stbi_uc)(a->code_buffer & 255); // suppress MSVC run-time check
+		a->code_buffer >>= 8;
+		a->num_bits -= 8;
+	}
+	STBI_ASSERT(a->num_bits == 0);
+	// now fill header the normal way
+	while (k < 4)
+		header[k++] = stbi__zget8(a);
+	len = header[1] * 256 + header[0];
+	nlen = header[3] * 256 + header[2];
+	if (nlen != (len ^ 0xffff))
+		return stbi__err("zlib corrupt", "Corrupt PNG");
+	if (a->zbuffer + len > a->zbuffer_end)
+		return stbi__err("read past buffer", "Corrupt PNG");
+	if (a->zout + len > a->zout_end)
+		if (!stbi__zexpand(a, a->zout, len))
+			return 0;
+	memcpy(a->zout, a->zbuffer, len);
+	a->zbuffer += len;
+	a->zout += len;
+	return 1;
+}
+
+static int stbi__parse_zlib_header(stbi__zbuf* a) {
+	int cmf = stbi__zget8(a);
+	int cm = cmf & 15;
+	/* int cinfo = cmf >> 4; */
+	int flg = stbi__zget8(a);
+	if ((cmf * 256 + flg) % 31 != 0)
+		return stbi__err("bad zlib header", "Corrupt PNG"); // zlib spec
+	if (flg & 32)
+		return stbi__err("no preset dict",
+						 "Corrupt PNG"); // preset dictionary not allowed in png
+	if (cm != 8)
+		return stbi__err("bad compression",
+						 "Corrupt PNG"); // DEFLATE required for png
+	// window = 1 << (8 + cinfo)... but who cares, we fully buffer output
+	return 1;
+}
+
+static const stbi_uc stbi__zdefault_length[288] = {
+	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+	9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+	9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+	9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8};
+static const stbi_uc stbi__zdefault_distance[32] = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5};
+/*
+Init algorithm:
+{
+   int i;   // use <= to match clearly with spec
+   for (i=0; i <= 143; ++i)     stbi__zdefault_length[i]   = 8;
+   for (   ; i <= 255; ++i)     stbi__zdefault_length[i]   = 9;
+   for (   ; i <= 279; ++i)     stbi__zdefault_length[i]   = 7;
+   for (   ; i <= 287; ++i)     stbi__zdefault_length[i]   = 8;
+
+   for (i=0; i <=  31; ++i)     stbi__zdefault_distance[i] = 5;
+}
+*/
+
+static int stbi__parse_zlib(stbi__zbuf* a, int parse_header) {
+	int final, type;
+	if (parse_header)
+		if (!stbi__parse_zlib_header(a))
+			return 0;
+	a->num_bits = 0;
+	a->code_buffer = 0;
+	do {
+		final = stbi__zreceive(a, 1);
+		type = stbi__zreceive(a, 2);
+		if (type == 0) {
+			if (!stbi__parse_uncompressed_block(a))
+				return 0;
+		} else if (type == 3) {
+			return 0;
+		} else {
+			if (type == 1) {
+				// use fixed code lengths
+				if (!stbi__zbuild_huffman(&a->z_length, stbi__zdefault_length, 288))
+					return 0;
+				if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32))
+					return 0;
+			} else {
+				if (!stbi__compute_huffman_codes(a))
+					return 0;
+			}
+			if (!stbi__parse_huffman_block(a))
+				return 0;
+		}
+	} while (!final);
+	return 1;
+}
+
+static int stbi__do_zlib(stbi__zbuf* a, char* obuf, int olen, int exp, int parse_header) {
+	a->zout_start = obuf;
+	a->zout = obuf;
+	a->zout_end = obuf + olen;
+	a->z_expandable = exp;
+
+	return stbi__parse_zlib(a, parse_header);
+}
+
+STBIDEF char* stbi_zlib_decode_malloc_guesssize(const char* buffer, int len, int initial_size, int* outlen) {
+	stbi__zbuf a;
+	char* p = (char*)stbi__malloc(initial_size);
+	if (p == NULL)
+		return NULL;
+	a.zbuffer = (stbi_uc*)buffer;
+	a.zbuffer_end = (stbi_uc*)buffer + len;
+	if (stbi__do_zlib(&a, p, initial_size, 1, 1)) {
+		if (outlen)
+			*outlen = (int)(a.zout - a.zout_start);
+		return a.zout_start;
+	} else {
+		STBI_FREE(a.zout_start);
+		return NULL;
+	}
+}
+
+STBIDEF char* stbi_zlib_decode_malloc(char const* buffer, int len, int* outlen) { return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); }
+
+STBIDEF char* stbi_zlib_decode_malloc_guesssize_headerflag(const char* buffer, int len, int initial_size, int* outlen, int parse_header) {
+	stbi__zbuf a;
+	char* p = (char*)stbi__malloc(initial_size);
+	if (p == NULL)
+		return NULL;
+	a.zbuffer = (stbi_uc*)buffer;
+	a.zbuffer_end = (stbi_uc*)buffer + len;
+	if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) {
+		if (outlen)
+			*outlen = (int)(a.zout - a.zout_start);
+		return a.zout_start;
+	} else {
+		STBI_FREE(a.zout_start);
+		return NULL;
+	}
+}
+
+STBIDEF int stbi_zlib_decode_buffer(char* obuffer, int olen, char const* ibuffer, int ilen) {
+	stbi__zbuf a;
+	a.zbuffer = (stbi_uc*)ibuffer;
+	a.zbuffer_end = (stbi_uc*)ibuffer + ilen;
+	if (stbi__do_zlib(&a, obuffer, olen, 0, 1))
+		return (int)(a.zout - a.zout_start);
+	else
+		return -1;
+}
+
+STBIDEF char* stbi_zlib_decode_noheader_malloc(char const* buffer, int len, int* outlen) {
+	stbi__zbuf a;
+	char* p = (char*)stbi__malloc(16384);
+	if (p == NULL)
+		return NULL;
+	a.zbuffer = (stbi_uc*)buffer;
+	a.zbuffer_end = (stbi_uc*)buffer + len;
+	if (stbi__do_zlib(&a, p, 16384, 1, 0)) {
+		if (outlen)
+			*outlen = (int)(a.zout - a.zout_start);
+		return a.zout_start;
+	} else {
+		STBI_FREE(a.zout_start);
+		return NULL;
+	}
+}
+
+STBIDEF int stbi_zlib_decode_noheader_buffer(char* obuffer, int olen, const char* ibuffer, int ilen) {
+	stbi__zbuf a;
+	a.zbuffer = (stbi_uc*)ibuffer;
+	a.zbuffer_end = (stbi_uc*)ibuffer + ilen;
+	if (stbi__do_zlib(&a, obuffer, olen, 0, 0))
+		return (int)(a.zout - a.zout_start);
+	else
+		return -1;
+}
+#endif
+
+// public domain "baseline" PNG decoder   v0.10  Sean Barrett 2006-11-18
+//    simple implementation
+//      - only 8-bit samples
+//      - no CRC checking
+//      - allocates lots of intermediate memory
+//        - avoids problem of streaming data between subsystems
+//        - avoids explicit window management
+//    performance
+//      - uses stb_zlib, a PD zlib implementation with fast huffman decoding
+
+#ifndef STBI_NO_PNG
+typedef struct {
+	stbi__uint32 length;
+	stbi__uint32 type;
+} stbi__pngchunk;
+
+static stbi__pngchunk stbi__get_chunk_header(stbi__context* s) {
+	stbi__pngchunk c;
+	c.length = stbi__get32be(s);
+	c.type = stbi__get32be(s);
+	return c;
+}
+
+static int stbi__check_png_header(stbi__context* s) {
+	static const stbi_uc png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+	int i;
+	for (i = 0; i < 8; ++i)
+		if (stbi__get8(s) != png_sig[i])
+			return stbi__err("bad png sig", "Not a PNG");
+	return 1;
+}
+
+typedef struct {
+	stbi__context* s;
+	stbi_uc *idata, *expanded, *out;
+	int depth;
+} stbi__png;
+
+enum {
+	STBI__F_none = 0,
+	STBI__F_sub = 1,
+	STBI__F_up = 2,
+	STBI__F_avg = 3,
+	STBI__F_paeth = 4,
+	// synthetic filters used for first scanline to avoid needing a dummy row of
+	// 0s
+	STBI__F_avg_first,
+	STBI__F_paeth_first
+};
+
+static stbi_uc first_row_filter[5] = {STBI__F_none, STBI__F_sub, STBI__F_none, STBI__F_avg_first, STBI__F_paeth_first};
+
+static int stbi__paeth(int a, int b, int c) {
+	int p = a + b - c;
+	int pa = abs(p - a);
+	int pb = abs(p - b);
+	int pc = abs(p - c);
+	if (pa <= pb && pa <= pc)
+		return a;
+	if (pb <= pc)
+		return b;
+	return c;
+}
+
+static const stbi_uc stbi__depth_scale_table[9] = {0, 0xff, 0x55, 0, 0x11, 0, 0, 0, 0x01};
+
+// create the png data from post-deflated data
+static int stbi__create_png_image_raw(stbi__png* a, stbi_uc* raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color) {
+	int bytes = (depth == 16 ? 2 : 1);
+	stbi__context* s = a->s;
+	stbi__uint32 i, j, stride = x * out_n * bytes;
+	stbi__uint32 img_len, img_width_bytes;
+	int k;
+	int img_n = s->img_n; // copy it into a local for later
+
+	int output_bytes = out_n * bytes;
+	int filter_bytes = img_n * bytes;
+	int width = x;
+
+	STBI_ASSERT(out_n == s->img_n || out_n == s->img_n + 1);
+	a->out = (stbi_uc*)stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into
+	if (!a->out)
+		return stbi__err("outofmem", "Out of memory");
+
+	if (!stbi__mad3sizes_valid(img_n, x, depth, 7))
+		return stbi__err("too large", "Corrupt PNG");
+	img_width_bytes = (((img_n * x * depth) + 7) >> 3);
+	img_len = (img_width_bytes + 1) * y;
+
+	// we used to check for exact match between raw_len and img_len on
+	// non-interlaced PNGs, but issue #276 reported a PNG in the wild that had
+	// extra data at the end (all zeros), so just check for raw_len < img_len
+	// always.
+	if (raw_len < img_len)
+		return stbi__err("not enough pixels", "Corrupt PNG");
+
+	for (j = 0; j < y; ++j) {
+		stbi_uc* cur = a->out + stride * j;
+		stbi_uc* prior;
+		int filter = *raw++;
+
+		if (filter > 4)
+			return stbi__err("invalid filter", "Corrupt PNG");
+
+		if (depth < 8) {
+			STBI_ASSERT(img_width_bytes <= x);
+			cur += x * out_n - img_width_bytes; // store output to the rightmost img_len
+												// bytes, so we can decode in place
+			filter_bytes = 1;
+			width = img_width_bytes;
+		}
+		prior = cur - stride; // bugfix: need to compute this after 'cur +='
+							  // computation above
+
+		// if first row, use special filter that doesn't sample previous row
+		if (j == 0)
+			filter = first_row_filter[filter];
+
+		// handle first byte explicitly
+		for (k = 0; k < filter_bytes; ++k) {
+			switch (filter) {
+			case STBI__F_none:
+				cur[k] = raw[k];
+				break;
+			case STBI__F_sub:
+				cur[k] = raw[k];
+				break;
+			case STBI__F_up:
+				cur[k] = STBI__BYTECAST(raw[k] + prior[k]);
+				break;
+			case STBI__F_avg:
+				cur[k] = STBI__BYTECAST(raw[k] + (prior[k] >> 1));
+				break;
+			case STBI__F_paeth:
+				cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0, prior[k], 0));
+				break;
+			case STBI__F_avg_first:
+				cur[k] = raw[k];
+				break;
+			case STBI__F_paeth_first:
+				cur[k] = raw[k];
+				break;
+			}
+		}
+
+		if (depth == 8) {
+			if (img_n != out_n)
+				cur[img_n] = 255; // first pixel
+			raw += img_n;
+			cur += out_n;
+			prior += out_n;
+		} else if (depth == 16) {
+			if (img_n != out_n) {
+				cur[filter_bytes] = 255;	 // first pixel top byte
+				cur[filter_bytes + 1] = 255; // first pixel bottom byte
+			}
+			raw += filter_bytes;
+			cur += output_bytes;
+			prior += output_bytes;
+		} else {
+			raw += 1;
+			cur += 1;
+			prior += 1;
+		}
+
+		// this is a little gross, so that we don't switch per-pixel or
+		// per-component
+		if (depth < 8 || img_n == out_n) {
+			int nk = (width - 1) * filter_bytes;
+#define STBI__CASE(f)                                                                                                                                          \
+	case f:                                                                                                                                                    \
+		for (k = 0; k < nk; ++k)
+			switch (filter) {
+			// "none" filter turns into a memcpy here; make that explicit.
+			case STBI__F_none:
+				memcpy(cur, raw, nk);
+				break;
+				STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - filter_bytes]); }
+				break;
+				STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); }
+				break;
+				STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - filter_bytes]) >> 1)); }
+				break;
+				STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], prior[k], prior[k - filter_bytes])); }
+				break;
+				STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - filter_bytes] >> 1)); }
+				break;
+				STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], 0, 0)); }
+				break;
+			}
+#undef STBI__CASE
+			raw += nk;
+		} else {
+			STBI_ASSERT(img_n + 1 == out_n);
+#define STBI__CASE(f)                                                                                                                                          \
+	case f:                                                                                                                                                    \
+		for (i = x - 1; i >= 1; --i, cur[filter_bytes] = 255, raw += filter_bytes, cur += output_bytes, prior += output_bytes)                                 \
+			for (k = 0; k < filter_bytes; ++k)
+			switch (filter) {
+				STBI__CASE(STBI__F_none) { cur[k] = raw[k]; }
+				break;
+				STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - output_bytes]); }
+				break;
+				STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); }
+				break;
+				STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - output_bytes]) >> 1)); }
+				break;
+				STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], prior[k], prior[k - output_bytes])); }
+				break;
+				STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - output_bytes] >> 1)); }
+				break;
+				STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], 0, 0)); }
+				break;
+			}
+#undef STBI__CASE
+
+			// the loop above sets the high byte of the pixels' alpha, but for
+			// 16 bit png files we also need the low byte set. we'll do that
+			// here.
+			if (depth == 16) {
+				cur = a->out + stride * j; // start at the beginning of the row again
+				for (i = 0; i < x; ++i, cur += output_bytes) {
+					cur[filter_bytes + 1] = 255;
+				}
+			}
+		}
+	}
+
+	// we make a separate pass to expand bits to pixels; for performance,
+	// this could run two scanlines behind the above code, so it won't
+	// intefere with filtering but will still be in the cache.
+	if (depth < 8) {
+		for (j = 0; j < y; ++j) {
+			stbi_uc* cur = a->out + stride * j;
+			stbi_uc* in = a->out + stride * j + x * out_n - img_width_bytes;
+			// unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the
+			// common 8-bit path optimal at minimal cost for 1/2/4-bit png
+			// guarante byte alignment, if width is not multiple of 8/4/2 we'll
+			// decode dummy trailing data that will be skipped in the later loop
+			stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range
+
+			// note that the final byte might overshoot and write more data than
+			// desired. we can allocate enough data that this never writes out
+			// of memory, but it could also overwrite the next scanline. can it
+			// overwrite non-empty data on the next scanline? yes, consider
+			// 1-pixel-wide scanlines with 1-bit-per-pixel. so we need to
+			// explicitly clamp the final ones
+
+			if (depth == 4) {
+				for (k = x * img_n; k >= 2; k -= 2, ++in) {
+					*cur++ = scale * ((*in >> 4));
+					*cur++ = scale * ((*in) & 0x0f);
+				}
+				if (k > 0)
+					*cur++ = scale * ((*in >> 4));
+			} else if (depth == 2) {
+				for (k = x * img_n; k >= 4; k -= 4, ++in) {
+					*cur++ = scale * ((*in >> 6));
+					*cur++ = scale * ((*in >> 4) & 0x03);
+					*cur++ = scale * ((*in >> 2) & 0x03);
+					*cur++ = scale * ((*in) & 0x03);
+				}
+				if (k > 0)
+					*cur++ = scale * ((*in >> 6));
+				if (k > 1)
+					*cur++ = scale * ((*in >> 4) & 0x03);
+				if (k > 2)
+					*cur++ = scale * ((*in >> 2) & 0x03);
+			} else if (depth == 1) {
+				for (k = x * img_n; k >= 8; k -= 8, ++in) {
+					*cur++ = scale * ((*in >> 7));
+					*cur++ = scale * ((*in >> 6) & 0x01);
+					*cur++ = scale * ((*in >> 5) & 0x01);
+					*cur++ = scale * ((*in >> 4) & 0x01);
+					*cur++ = scale * ((*in >> 3) & 0x01);
+					*cur++ = scale * ((*in >> 2) & 0x01);
+					*cur++ = scale * ((*in >> 1) & 0x01);
+					*cur++ = scale * ((*in) & 0x01);
+				}
+				if (k > 0)
+					*cur++ = scale * ((*in >> 7));
+				if (k > 1)
+					*cur++ = scale * ((*in >> 6) & 0x01);
+				if (k > 2)
+					*cur++ = scale * ((*in >> 5) & 0x01);
+				if (k > 3)
+					*cur++ = scale * ((*in >> 4) & 0x01);
+				if (k > 4)
+					*cur++ = scale * ((*in >> 3) & 0x01);
+				if (k > 5)
+					*cur++ = scale * ((*in >> 2) & 0x01);
+				if (k > 6)
+					*cur++ = scale * ((*in >> 1) & 0x01);
+			}
+			if (img_n != out_n) {
+				int q;
+				// insert alpha = 255
+				cur = a->out + stride * j;
+				if (img_n == 1) {
+					for (q = x - 1; q >= 0; --q) {
+						cur[q * 2 + 1] = 255;
+						cur[q * 2 + 0] = cur[q];
+					}
+				} else {
+					STBI_ASSERT(img_n == 3);
+					for (q = x - 1; q >= 0; --q) {
+						cur[q * 4 + 3] = 255;
+						cur[q * 4 + 2] = cur[q * 3 + 2];
+						cur[q * 4 + 1] = cur[q * 3 + 1];
+						cur[q * 4 + 0] = cur[q * 3 + 0];
+					}
+				}
+			}
+		}
+	} else if (depth == 16) {
+		// force the image data from big-endian to platform-native.
+		// this is done in a separate pass due to the decoding relying
+		// on the data being untouched, but could probably be done
+		// per-line during decode if care is taken.
+		stbi_uc* cur = a->out;
+		stbi__uint16* cur16 = (stbi__uint16*)cur;
+
+		for (i = 0; i < x * y * out_n; ++i, cur16++, cur += 2) {
+			*cur16 = (cur[0] << 8) | cur[1];
+		}
+	}
+
+	return 1;
+}
+
+static int stbi__create_png_image(stbi__png* a, stbi_uc* image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced) {
+	int bytes = (depth == 16 ? 2 : 1);
+	int out_bytes = out_n * bytes;
+	stbi_uc* final;
+	int p;
+	if (!interlaced)
+		return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color);
+
+	// de-interlacing
+	final = (stbi_uc*)stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0);
+	for (p = 0; p < 7; ++p) {
+		int xorig[] = {0, 4, 0, 2, 0, 1, 0};
+		int yorig[] = {0, 0, 4, 0, 2, 0, 1};
+		int xspc[] = {8, 8, 4, 4, 2, 2, 1};
+		int yspc[] = {8, 8, 8, 4, 4, 2, 2};
+		int i, j, x, y;
+		// pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1
+		x = (a->s->img_x - xorig[p] + xspc[p] - 1) / xspc[p];
+		y = (a->s->img_y - yorig[p] + yspc[p] - 1) / yspc[p];
+		if (x && y) {
+			stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y;
+			if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) {
+				STBI_FREE(final);
+				return 0;
+			}
+			for (j = 0; j < y; ++j) {
+				for (i = 0; i < x; ++i) {
+					int out_y = j * yspc[p] + yorig[p];
+					int out_x = i * xspc[p] + xorig[p];
+					memcpy(final + out_y * a->s->img_x * out_bytes + out_x * out_bytes, a->out + (j * x + i) * out_bytes, out_bytes);
+				}
+			}
+			STBI_FREE(a->out);
+			image_data += img_len;
+			image_data_len -= img_len;
+		}
+	}
+	a->out = final;
+
+	return 1;
+}
+
+static int stbi__compute_transparency(stbi__png* z, stbi_uc tc[3], int out_n) {
+	stbi__context* s = z->s;
+	stbi__uint32 i, pixel_count = s->img_x * s->img_y;
+	stbi_uc* p = z->out;
+
+	// compute color-based transparency, assuming we've
+	// already got 255 as the alpha value in the output
+	STBI_ASSERT(out_n == 2 || out_n == 4);
+
+	if (out_n == 2) {
+		for (i = 0; i < pixel_count; ++i) {
+			p[1] = (p[0] == tc[0] ? 0 : 255);
+			p += 2;
+		}
+	} else {
+		for (i = 0; i < pixel_count; ++i) {
+			if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
+				p[3] = 0;
+			p += 4;
+		}
+	}
+	return 1;
+}
+
+static int stbi__compute_transparency16(stbi__png* z, stbi__uint16 tc[3], int out_n) {
+	stbi__context* s = z->s;
+	stbi__uint32 i, pixel_count = s->img_x * s->img_y;
+	stbi__uint16* p = (stbi__uint16*)z->out;
+
+	// compute color-based transparency, assuming we've
+	// already got 65535 as the alpha value in the output
+	STBI_ASSERT(out_n == 2 || out_n == 4);
+
+	if (out_n == 2) {
+		for (i = 0; i < pixel_count; ++i) {
+			p[1] = (p[0] == tc[0] ? 0 : 65535);
+			p += 2;
+		}
+	} else {
+		for (i = 0; i < pixel_count; ++i) {
+			if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
+				p[3] = 0;
+			p += 4;
+		}
+	}
+	return 1;
+}
+
+static int stbi__expand_png_palette(stbi__png* a, stbi_uc* palette, int len, int pal_img_n) {
+	stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y;
+	stbi_uc *p, *temp_out, *orig = a->out;
+
+	p = (stbi_uc*)stbi__malloc_mad2(pixel_count, pal_img_n, 0);
+	if (p == NULL)
+		return stbi__err("outofmem", "Out of memory");
+
+	// between here and free(out) below, exitting would leak
+	temp_out = p;
+
+	if (pal_img_n == 3) {
+		for (i = 0; i < pixel_count; ++i) {
+			int n = orig[i] * 4;
+			p[0] = palette[n];
+			p[1] = palette[n + 1];
+			p[2] = palette[n + 2];
+			p += 3;
+		}
+	} else {
+		for (i = 0; i < pixel_count; ++i) {
+			int n = orig[i] * 4;
+			p[0] = palette[n];
+			p[1] = palette[n + 1];
+			p[2] = palette[n + 2];
+			p[3] = palette[n + 3];
+			p += 4;
+		}
+	}
+	STBI_FREE(a->out);
+	a->out = temp_out;
+
+	STBI_NOTUSED(len);
+
+	return 1;
+}
+
+static int stbi__unpremultiply_on_load = 0;
+static int stbi__de_iphone_flag = 0;
+
+STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) { stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply; }
+
+STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) { stbi__de_iphone_flag = flag_true_if_should_convert; }
+
+static void stbi__de_iphone(stbi__png* z) {
+	stbi__context* s = z->s;
+	stbi__uint32 i, pixel_count = s->img_x * s->img_y;
+	stbi_uc* p = z->out;
+
+	if (s->img_out_n == 3) { // convert bgr to rgb
+		for (i = 0; i < pixel_count; ++i) {
+			stbi_uc t = p[0];
+			p[0] = p[2];
+			p[2] = t;
+			p += 3;
+		}
+	} else {
+		STBI_ASSERT(s->img_out_n == 4);
+		if (stbi__unpremultiply_on_load) {
+			// convert bgr to rgb and unpremultiply
+			for (i = 0; i < pixel_count; ++i) {
+				stbi_uc a = p[3];
+				stbi_uc t = p[0];
+				if (a) {
+					stbi_uc half = a / 2;
+					p[0] = (p[2] * 255 + half) / a;
+					p[1] = (p[1] * 255 + half) / a;
+					p[2] = (t * 255 + half) / a;
+				} else {
+					p[0] = p[2];
+					p[2] = t;
+				}
+				p += 4;
+			}
+		} else {
+			// convert bgr to rgb
+			for (i = 0; i < pixel_count; ++i) {
+				stbi_uc t = p[0];
+				p[0] = p[2];
+				p[2] = t;
+				p += 4;
+			}
+		}
+	}
+}
+
+#define STBI__PNG_TYPE(a, b, c, d) (((unsigned)(a) << 24) + ((unsigned)(b) << 16) + ((unsigned)(c) << 8) + (unsigned)(d))
+
+static int stbi__parse_png_file(stbi__png* z, int scan, int req_comp) {
+	stbi_uc palette[1024], pal_img_n = 0;
+	stbi_uc has_trans = 0, tc[3] = {0};
+	stbi__uint16 tc16[3];
+	stbi__uint32 ioff = 0, idata_limit = 0, i, pal_len = 0;
+	int first = 1, k, interlace = 0, color = 0, is_iphone = 0;
+	stbi__context* s = z->s;
+
+	z->expanded = NULL;
+	z->idata = NULL;
+	z->out = NULL;
+
+	if (!stbi__check_png_header(s))
+		return 0;
+
+	if (scan == STBI__SCAN_type)
+		return 1;
+
+	for (;;) {
+		stbi__pngchunk c = stbi__get_chunk_header(s);
+		switch (c.type) {
+		case STBI__PNG_TYPE('C', 'g', 'B', 'I'):
+			is_iphone = 1;
+			stbi__skip(s, c.length);
+			break;
+		case STBI__PNG_TYPE('I', 'H', 'D', 'R'): {
+			int comp, filter;
+			if (!first)
+				return stbi__err("multiple IHDR", "Corrupt PNG");
+			first = 0;
+			if (c.length != 13)
+				return stbi__err("bad IHDR len", "Corrupt PNG");
+			s->img_x = stbi__get32be(s);
+			if (s->img_x > (1 << 24))
+				return stbi__err("too large", "Very large image (corrupt?)");
+			s->img_y = stbi__get32be(s);
+			if (s->img_y > (1 << 24))
+				return stbi__err("too large", "Very large image (corrupt?)");
+			z->depth = stbi__get8(s);
+			if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16)
+				return stbi__err("1/2/4/8/16-bit only", "PNG not supported: 1/2/4/8/16-bit only");
+			color = stbi__get8(s);
+			if (color > 6)
+				return stbi__err("bad ctype", "Corrupt PNG");
+			if (color == 3 && z->depth == 16)
+				return stbi__err("bad ctype", "Corrupt PNG");
+			if (color == 3)
+				pal_img_n = 3;
+			else if (color & 1)
+				return stbi__err("bad ctype", "Corrupt PNG");
+			comp = stbi__get8(s);
+			if (comp)
+				return stbi__err("bad comp method", "Corrupt PNG");
+			filter = stbi__get8(s);
+			if (filter)
+				return stbi__err("bad filter method", "Corrupt PNG");
+			interlace = stbi__get8(s);
+			if (interlace > 1)
+				return stbi__err("bad interlace method", "Corrupt PNG");
+			if (!s->img_x || !s->img_y)
+				return stbi__err("0-pixel image", "Corrupt PNG");
+			if (!pal_img_n) {
+				s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
+				if ((1 << 30) / s->img_x / s->img_n < s->img_y)
+					return stbi__err("too large", "Image too large to decode");
+				if (scan == STBI__SCAN_header)
+					return 1;
+			} else {
+				// if paletted, then pal_n is our final components, and
+				// img_n is # components to decompress/filter.
+				s->img_n = 1;
+				if ((1 << 30) / s->img_x / 4 < s->img_y)
+					return stbi__err("too large", "Corrupt PNG");
+				// if SCAN_header, have to scan to see if we have a tRNS
+			}
+			break;
+		}
+
+		case STBI__PNG_TYPE('P', 'L', 'T', 'E'): {
+			if (first)
+				return stbi__err("first not IHDR", "Corrupt PNG");
+			if (c.length > 256 * 3)
+				return stbi__err("invalid PLTE", "Corrupt PNG");
+			pal_len = c.length / 3;
+			if (pal_len * 3 != c.length)
+				return stbi__err("invalid PLTE", "Corrupt PNG");
+			for (i = 0; i < pal_len; ++i) {
+				palette[i * 4 + 0] = stbi__get8(s);
+				palette[i * 4 + 1] = stbi__get8(s);
+				palette[i * 4 + 2] = stbi__get8(s);
+				palette[i * 4 + 3] = 255;
+			}
+			break;
+		}
+
+		case STBI__PNG_TYPE('t', 'R', 'N', 'S'): {
+			if (first)
+				return stbi__err("first not IHDR", "Corrupt PNG");
+			if (z->idata)
+				return stbi__err("tRNS after IDAT", "Corrupt PNG");
+			if (pal_img_n) {
+				if (scan == STBI__SCAN_header) {
+					s->img_n = 4;
+					return 1;
+				}
+				if (pal_len == 0)
+					return stbi__err("tRNS before PLTE", "Corrupt PNG");
+				if (c.length > pal_len)
+					return stbi__err("bad tRNS len", "Corrupt PNG");
+				pal_img_n = 4;
+				for (i = 0; i < c.length; ++i)
+					palette[i * 4 + 3] = stbi__get8(s);
+			} else {
+				if (!(s->img_n & 1))
+					return stbi__err("tRNS with alpha", "Corrupt PNG");
+				if (c.length != (stbi__uint32)s->img_n * 2)
+					return stbi__err("bad tRNS len", "Corrupt PNG");
+				has_trans = 1;
+				if (z->depth == 16) {
+					for (k = 0; k < s->img_n; ++k)
+						tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
+				} else {
+					for (k = 0; k < s->img_n; ++k)
+						tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit
+																									   // images will be
+																									   // larger
+				}
+			}
+			break;
+		}
+
+		case STBI__PNG_TYPE('I', 'D', 'A', 'T'): {
+			if (first)
+				return stbi__err("first not IHDR", "Corrupt PNG");
+			if (pal_img_n && !pal_len)
+				return stbi__err("no PLTE", "Corrupt PNG");
+			if (scan == STBI__SCAN_header) {
+				s->img_n = pal_img_n;
+				return 1;
+			}
+			if ((int)(ioff + c.length) < (int)ioff)
+				return 0;
+			if (ioff + c.length > idata_limit) {
+				stbi__uint32 idata_limit_old = idata_limit;
+				stbi_uc* p;
+				if (idata_limit == 0)
+					idata_limit = c.length > 4096 ? c.length : 4096;
+				while (ioff + c.length > idata_limit)
+					idata_limit *= 2;
+				STBI_NOTUSED(idata_limit_old);
+				p = (stbi_uc*)STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit);
+				if (p == NULL)
+					return stbi__err("outofmem", "Out of memory");
+				z->idata = p;
+			}
+			if (!stbi__getn(s, z->idata + ioff, c.length))
+				return stbi__err("outofdata", "Corrupt PNG");
+			ioff += c.length;
+			break;
+		}
+
+		case STBI__PNG_TYPE('I', 'E', 'N', 'D'): {
+			stbi__uint32 raw_len, bpl;
+			if (first)
+				return stbi__err("first not IHDR", "Corrupt PNG");
+			if (scan != STBI__SCAN_load)
+				return 1;
+			if (z->idata == NULL)
+				return stbi__err("no IDAT", "Corrupt PNG");
+			// initial guess for decoded data size to avoid unnecessary reallocs
+			bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component
+			raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */;
+			z->expanded = (stbi_uc*)stbi_zlib_decode_malloc_guesssize_headerflag((char*)z->idata, ioff, raw_len, (int*)&raw_len, !is_iphone);
+			if (z->expanded == NULL)
+				return 0; // zlib should set error
+			STBI_FREE(z->idata);
+			z->idata = NULL;
+			if ((req_comp == s->img_n + 1 && req_comp != 3 && !pal_img_n) || has_trans)
+				s->img_out_n = s->img_n + 1;
+			else
+				s->img_out_n = s->img_n;
+			if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace))
+				return 0;
+			if (has_trans) {
+				if (z->depth == 16) {
+					if (!stbi__compute_transparency16(z, tc16, s->img_out_n))
+						return 0;
+				} else {
+					if (!stbi__compute_transparency(z, tc, s->img_out_n))
+						return 0;
+				}
+			}
+			if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2)
+				stbi__de_iphone(z);
+			if (pal_img_n) {
+				// pal_img_n == 3 or 4
+				s->img_n = pal_img_n; // record the actual colors we had
+				s->img_out_n = pal_img_n;
+				if (req_comp >= 3)
+					s->img_out_n = req_comp;
+				if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n))
+					return 0;
+			} else if (has_trans) {
+				// non-paletted image with tRNS -> source image has (constant)
+				// alpha
+				++s->img_n;
+			}
+			STBI_FREE(z->expanded);
+			z->expanded = NULL;
+			// end of PNG chunk, read and skip CRC
+			stbi__get32be(s);
+			return 1;
+		}
+
+		default:
+			// if critical, fail
+			if (first)
+				return stbi__err("first not IHDR", "Corrupt PNG");
+			if ((c.type & (1 << 29)) == 0) {
+#ifndef STBI_NO_FAILURE_STRINGS
+				// not threadsafe
+				static char invalid_chunk[] = "XXXX PNG chunk not known";
+				invalid_chunk[0] = STBI__BYTECAST(c.type >> 24);
+				invalid_chunk[1] = STBI__BYTECAST(c.type >> 16);
+				invalid_chunk[2] = STBI__BYTECAST(c.type >> 8);
+				invalid_chunk[3] = STBI__BYTECAST(c.type >> 0);
+#endif
+				return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type");
+			}
+			stbi__skip(s, c.length);
+			break;
+		}
+		// end of PNG chunk, read and skip CRC
+		stbi__get32be(s);
+	}
+}
+
+static void* stbi__do_png(stbi__png* p, int* x, int* y, int* n, int req_comp, stbi__result_info* ri) {
+	void* result = NULL;
+	if (req_comp < 0 || req_comp > 4)
+		return stbi__errpuc("bad req_comp", "Internal error");
+	if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) {
+		if (p->depth < 8)
+			ri->bits_per_channel = 8;
+		else
+			ri->bits_per_channel = p->depth;
+		result = p->out;
+		p->out = NULL;
+		if (req_comp && req_comp != p->s->img_out_n) {
+			if (ri->bits_per_channel == 8)
+				result = stbi__convert_format((unsigned char*)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
+			else
+				result = stbi__convert_format16((stbi__uint16*)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
+			p->s->img_out_n = req_comp;
+			if (result == NULL)
+				return result;
+		}
+		*x = p->s->img_x;
+		*y = p->s->img_y;
+		if (n)
+			*n = p->s->img_n;
+	}
+	STBI_FREE(p->out);
+	p->out = NULL;
+	STBI_FREE(p->expanded);
+	p->expanded = NULL;
+	STBI_FREE(p->idata);
+	p->idata = NULL;
+
+	return result;
+}
+
+static void* stbi__png_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
+	stbi__png p;
+	p.s = s;
+	return stbi__do_png(&p, x, y, comp, req_comp, ri);
+}
+
+static int stbi__png_test(stbi__context* s) {
+	int r;
+	r = stbi__check_png_header(s);
+	stbi__rewind(s);
+	return r;
+}
+
+static int stbi__png_info_raw(stbi__png* p, int* x, int* y, int* comp) {
+	if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) {
+		stbi__rewind(p->s);
+		return 0;
+	}
+	if (x)
+		*x = p->s->img_x;
+	if (y)
+		*y = p->s->img_y;
+	if (comp)
+		*comp = p->s->img_n;
+	return 1;
+}
+
+static int stbi__png_info(stbi__context* s, int* x, int* y, int* comp) {
+	stbi__png p;
+	p.s = s;
+	return stbi__png_info_raw(&p, x, y, comp);
+}
+
+static int stbi__png_is16(stbi__context* s) {
+	stbi__png p;
+	p.s = s;
+	if (!stbi__png_info_raw(&p, NULL, NULL, NULL))
+		return 0;
+	if (p.depth != 16) {
+		stbi__rewind(p.s);
+		return 0;
+	}
+	return 1;
+}
+#endif
+
+// Microsoft/Windows BMP image
+
+#ifndef STBI_NO_BMP
+static int stbi__bmp_test_raw(stbi__context* s) {
+	int r;
+	int sz;
+	if (stbi__get8(s) != 'B')
+		return 0;
+	if (stbi__get8(s) != 'M')
+		return 0;
+	stbi__get32le(s); // discard filesize
+	stbi__get16le(s); // discard reserved
+	stbi__get16le(s); // discard reserved
+	stbi__get32le(s); // discard data offset
+	sz = stbi__get32le(s);
+	r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124);
+	return r;
+}
+
+static int stbi__bmp_test(stbi__context* s) {
+	int r = stbi__bmp_test_raw(s);
+	stbi__rewind(s);
+	return r;
+}
+
+// returns 0..31 for the highest set bit
+static int stbi__high_bit(unsigned int z) {
+	int n = 0;
+	if (z == 0)
+		return -1;
+	if (z >= 0x10000) {
+		n += 16;
+		z >>= 16;
+	}
+	if (z >= 0x00100) {
+		n += 8;
+		z >>= 8;
+	}
+	if (z >= 0x00010) {
+		n += 4;
+		z >>= 4;
+	}
+	if (z >= 0x00004) {
+		n += 2;
+		z >>= 2;
+	}
+	if (z >= 0x00002) {
+		n += 1; /* >>=  1;*/
+	}
+	return n;
+}
+
+static int stbi__bitcount(unsigned int a) {
+	a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2
+	a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4
+	a = (a + (a >> 4)) & 0x0f0f0f0f;				// max 8 per 4, now 8 bits
+	a = (a + (a >> 8));								// max 16 per 8 bits
+	a = (a + (a >> 16));							// max 32 per 8 bits
+	return a & 0xff;
+}
+
+// extract an arbitrarily-aligned N-bit value (N=bits)
+// from v, and then make it 8-bits long and fractionally
+// extend it to full full range.
+static int stbi__shiftsigned(unsigned int v, int shift, int bits) {
+	static unsigned int mul_table[9] = {
+		0,
+		0xff /*0b11111111*/,
+		0x55 /*0b01010101*/,
+		0x49 /*0b01001001*/,
+		0x11 /*0b00010001*/,
+		0x21 /*0b00100001*/,
+		0x41 /*0b01000001*/,
+		0x81 /*0b10000001*/,
+		0x01 /*0b00000001*/,
+	};
+	static unsigned int shift_table[9] = {
+		0, 0, 0, 1, 0, 2, 4, 6, 0,
+	};
+	if (shift < 0)
+		v <<= -shift;
+	else
+		v >>= shift;
+	STBI_ASSERT(v < 256);
+	v >>= (8 - bits);
+	STBI_ASSERT(bits >= 0 && bits <= 8);
+	return (int)((unsigned)v * mul_table[bits]) >> shift_table[bits];
+}
+
+typedef struct {
+	int bpp, offset, hsz;
+	unsigned int mr, mg, mb, ma, all_a;
+	int extra_read;
+} stbi__bmp_data;
+
+static void* stbi__bmp_parse_header(stbi__context* s, stbi__bmp_data* info) {
+	int hsz;
+	if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M')
+		return stbi__errpuc("not BMP", "Corrupt BMP");
+	stbi__get32le(s); // discard filesize
+	stbi__get16le(s); // discard reserved
+	stbi__get16le(s); // discard reserved
+	info->offset = stbi__get32le(s);
+	info->hsz = hsz = stbi__get32le(s);
+	info->mr = info->mg = info->mb = info->ma = 0;
+	info->extra_read = 14;
+
+	if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124)
+		return stbi__errpuc("unknown BMP", "BMP type not supported: unknown");
+	if (hsz == 12) {
+		s->img_x = stbi__get16le(s);
+		s->img_y = stbi__get16le(s);
+	} else {
+		s->img_x = stbi__get32le(s);
+		s->img_y = stbi__get32le(s);
+	}
+	if (stbi__get16le(s) != 1)
+		return stbi__errpuc("bad BMP", "bad BMP");
+	info->bpp = stbi__get16le(s);
+	if (hsz != 12) {
+		int compress = stbi__get32le(s);
+		if (compress == 1 || compress == 2)
+			return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
+		stbi__get32le(s); // discard sizeof
+		stbi__get32le(s); // discard hres
+		stbi__get32le(s); // discard vres
+		stbi__get32le(s); // discard colorsused
+		stbi__get32le(s); // discard max important
+		if (hsz == 40 || hsz == 56) {
+			if (hsz == 56) {
+				stbi__get32le(s);
+				stbi__get32le(s);
+				stbi__get32le(s);
+				stbi__get32le(s);
+			}
+			if (info->bpp == 16 || info->bpp == 32) {
+				if (compress == 0) {
+					if (info->bpp == 32) {
+						info->mr = 0xffu << 16;
+						info->mg = 0xffu << 8;
+						info->mb = 0xffu << 0;
+						info->ma = 0xffu << 24;
+						info->all_a = 0; // if all_a is 0 at end, then we loaded
+										 // alpha channel but it was all 0
+					} else {
+						info->mr = 31u << 10;
+						info->mg = 31u << 5;
+						info->mb = 31u << 0;
+					}
+				} else if (compress == 3) {
+					info->mr = stbi__get32le(s);
+					info->mg = stbi__get32le(s);
+					info->mb = stbi__get32le(s);
+					info->extra_read += 12;
+					// not documented, but generated by photoshop and handled by
+					// mspaint
+					if (info->mr == info->mg && info->mg == info->mb) {
+						// ?!?!?
+						return stbi__errpuc("bad BMP", "bad BMP");
+					}
+				} else
+					return stbi__errpuc("bad BMP", "bad BMP");
+			}
+		} else {
+			int i;
+			if (hsz != 108 && hsz != 124)
+				return stbi__errpuc("bad BMP", "bad BMP");
+			info->mr = stbi__get32le(s);
+			info->mg = stbi__get32le(s);
+			info->mb = stbi__get32le(s);
+			info->ma = stbi__get32le(s);
+			stbi__get32le(s); // discard color space
+			for (i = 0; i < 12; ++i)
+				stbi__get32le(s); // discard color space parameters
+			if (hsz == 124) {
+				stbi__get32le(s); // discard rendering intent
+				stbi__get32le(s); // discard offset of profile data
+				stbi__get32le(s); // discard size of profile data
+				stbi__get32le(s); // discard reserved
+			}
+		}
+	}
+	return (void*)1;
+}
+
+static void* stbi__bmp_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
+	stbi_uc* out;
+	unsigned int mr = 0, mg = 0, mb = 0, ma = 0, all_a;
+	stbi_uc pal[256][4];
+	int psize = 0, i, j, width;
+	int flip_vertically, pad, target;
+	stbi__bmp_data info;
+	STBI_NOTUSED(ri);
+
+	info.all_a = 255;
+	if (stbi__bmp_parse_header(s, &info) == NULL)
+		return NULL; // error code already set
+
+	flip_vertically = ((int)s->img_y) > 0;
+	s->img_y = abs((int)s->img_y);
+
+	mr = info.mr;
+	mg = info.mg;
+	mb = info.mb;
+	ma = info.ma;
+	all_a = info.all_a;
+
+	if (info.hsz == 12) {
+		if (info.bpp < 24)
+			psize = (info.offset - info.extra_read - 24) / 3;
+	} else {
+		if (info.bpp < 16)
+			psize = (info.offset - info.extra_read - info.hsz) >> 2;
+	}
+	if (psize == 0) {
+		STBI_ASSERT(info.offset == (s->img_buffer - s->buffer_start));
+	}
+
+	if (info.bpp == 24 && ma == 0xff000000)
+		s->img_n = 3;
+	else
+		s->img_n = ma ? 4 : 3;
+	if (req_comp && req_comp >= 3) // we can directly decode 3 or 4
+		target = req_comp;
+	else
+		target = s->img_n; // if they want monochrome, we'll post-convert
+
+	// sanity-check size
+	if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0))
+		return stbi__errpuc("too large", "Corrupt BMP");
+
+	out = (stbi_uc*)stbi__malloc_mad3(target, s->img_x, s->img_y, 0);
+	if (!out)
+		return stbi__errpuc("outofmem", "Out of memory");
+	if (info.bpp < 16) {
+		int z = 0;
+		if (psize == 0 || psize > 256) {
+			STBI_FREE(out);
+			return stbi__errpuc("invalid", "Corrupt BMP");
+		}
+		for (i = 0; i < psize; ++i) {
+			pal[i][2] = stbi__get8(s);
+			pal[i][1] = stbi__get8(s);
+			pal[i][0] = stbi__get8(s);
+			if (info.hsz != 12)
+				stbi__get8(s);
+			pal[i][3] = 255;
+		}
+		stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4));
+		if (info.bpp == 1)
+			width = (s->img_x + 7) >> 3;
+		else if (info.bpp == 4)
+			width = (s->img_x + 1) >> 1;
+		else if (info.bpp == 8)
+			width = s->img_x;
+		else {
+			STBI_FREE(out);
+			return stbi__errpuc("bad bpp", "Corrupt BMP");
+		}
+		pad = (-width) & 3;
+		if (info.bpp == 1) {
+			for (j = 0; j < (int)s->img_y; ++j) {
+				int bit_offset = 7, v = stbi__get8(s);
+				for (i = 0; i < (int)s->img_x; ++i) {
+					int color = (v >> bit_offset) & 0x1;
+					out[z++] = pal[color][0];
+					out[z++] = pal[color][1];
+					out[z++] = pal[color][2];
+					if (target == 4)
+						out[z++] = 255;
+					if (i + 1 == (int)s->img_x)
+						break;
+					if ((--bit_offset) < 0) {
+						bit_offset = 7;
+						v = stbi__get8(s);
+					}
+				}
+				stbi__skip(s, pad);
+			}
+		} else {
+			for (j = 0; j < (int)s->img_y; ++j) {
+				for (i = 0; i < (int)s->img_x; i += 2) {
+					int v = stbi__get8(s), v2 = 0;
+					if (info.bpp == 4) {
+						v2 = v & 15;
+						v >>= 4;
+					}
+					out[z++] = pal[v][0];
+					out[z++] = pal[v][1];
+					out[z++] = pal[v][2];
+					if (target == 4)
+						out[z++] = 255;
+					if (i + 1 == (int)s->img_x)
+						break;
+					v = (info.bpp == 8) ? stbi__get8(s) : v2;
+					out[z++] = pal[v][0];
+					out[z++] = pal[v][1];
+					out[z++] = pal[v][2];
+					if (target == 4)
+						out[z++] = 255;
+				}
+				stbi__skip(s, pad);
+			}
+		}
+	} else {
+		int rshift = 0, gshift = 0, bshift = 0, ashift = 0, rcount = 0, gcount = 0, bcount = 0, acount = 0;
+		int z = 0;
+		int easy = 0;
+		stbi__skip(s, info.offset - info.extra_read - info.hsz);
+		if (info.bpp == 24)
+			width = 3 * s->img_x;
+		else if (info.bpp == 16)
+			width = 2 * s->img_x;
+		else /* bpp = 32 and pad = 0 */
+			width = 0;
+		pad = (-width) & 3;
+		if (info.bpp == 24) {
+			easy = 1;
+		} else if (info.bpp == 32) {
+			if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000)
+				easy = 2;
+		}
+		if (!easy) {
+			if (!mr || !mg || !mb) {
+				STBI_FREE(out);
+				return stbi__errpuc("bad masks", "Corrupt BMP");
+			}
+			// right shift amt to put high bit in position #7
+			rshift = stbi__high_bit(mr) - 7;
+			rcount = stbi__bitcount(mr);
+			gshift = stbi__high_bit(mg) - 7;
+			gcount = stbi__bitcount(mg);
+			bshift = stbi__high_bit(mb) - 7;
+			bcount = stbi__bitcount(mb);
+			ashift = stbi__high_bit(ma) - 7;
+			acount = stbi__bitcount(ma);
+		}
+		for (j = 0; j < (int)s->img_y; ++j) {
+			if (easy) {
+				for (i = 0; i < (int)s->img_x; ++i) {
+					unsigned char a;
+					out[z + 2] = stbi__get8(s);
+					out[z + 1] = stbi__get8(s);
+					out[z + 0] = stbi__get8(s);
+					z += 3;
+					a = (easy == 2 ? stbi__get8(s) : 255);
+					all_a |= a;
+					if (target == 4)
+						out[z++] = a;
+				}
+			} else {
+				int bpp = info.bpp;
+				for (i = 0; i < (int)s->img_x; ++i) {
+					stbi__uint32 v = (bpp == 16 ? (stbi__uint32)stbi__get16le(s) : stbi__get32le(s));
+					unsigned int a;
+					out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount));
+					out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount));
+					out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount));
+					a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
+					all_a |= a;
+					if (target == 4)
+						out[z++] = STBI__BYTECAST(a);
+				}
+			}
+			stbi__skip(s, pad);
+		}
+	}
+
+	// if alpha channel is all 0s, replace with all 255s
+	if (target == 4 && all_a == 0)
+		for (i = 4 * s->img_x * s->img_y - 1; i >= 0; i -= 4)
+			out[i] = 255;
+
+	if (flip_vertically) {
+		stbi_uc t;
+		for (j = 0; j<(int)s->img_y>> 1; ++j) {
+			stbi_uc* p1 = out + j * s->img_x * target;
+			stbi_uc* p2 = out + (s->img_y - 1 - j) * s->img_x * target;
+			for (i = 0; i < (int)s->img_x * target; ++i) {
+				t = p1[i];
+				p1[i] = p2[i];
+				p2[i] = t;
+			}
+		}
+	}
+
+	if (req_comp && req_comp != target) {
+		out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y);
+		if (out == NULL)
+			return out; // stbi__convert_format frees input on failure
+	}
+
+	*x = s->img_x;
+	*y = s->img_y;
+	if (comp)
+		*comp = s->img_n;
+	return out;
+}
+#endif
+
+// Targa Truevision - TGA
+// by Jonathan Dummer
+#ifndef STBI_NO_TGA
+// returns STBI_rgb or whatever, 0 on error
+static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16) {
+	// only RGB or RGBA (incl. 16bit) or grey allowed
+	if (is_rgb16)
+		*is_rgb16 = 0;
+	switch (bits_per_pixel) {
+	case 8:
+		return STBI_grey;
+	case 16:
+		if (is_grey)
+			return STBI_grey_alpha;
+		// fallthrough
+	case 15:
+		if (is_rgb16)
+			*is_rgb16 = 1;
+		return STBI_rgb;
+	case 24: // fallthrough
+	case 32:
+		return bits_per_pixel / 8;
+	default:
+		return 0;
+	}
+}
+
+static int stbi__tga_info(stbi__context* s, int* x, int* y, int* comp) {
+	int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp;
+	int sz, tga_colormap_type;
+	stbi__get8(s);					   // discard Offset
+	tga_colormap_type = stbi__get8(s); // colormap type
+	if (tga_colormap_type > 1) {
+		stbi__rewind(s);
+		return 0; // only RGB or indexed allowed
+	}
+	tga_image_type = stbi__get8(s); // image type
+	if (tga_colormap_type == 1) {   // colormapped (paletted) image
+		if (tga_image_type != 1 && tga_image_type != 9) {
+			stbi__rewind(s);
+			return 0;
+		}
+		stbi__skip(s,
+				   4);		// skip index of first colormap entry and number of entries
+		sz = stbi__get8(s); //   check bits per palette color entry
+		if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) {
+			stbi__rewind(s);
+			return 0;
+		}
+		stbi__skip(s, 4); // skip image x and y origin
+		tga_colormap_bpp = sz;
+	} else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE
+		if ((tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11)) {
+			stbi__rewind(s);
+			return 0; // only RGB or grey allowed, +/- RLE
+		}
+		stbi__skip(s, 9); // skip colormap specification and image x/y origin
+		tga_colormap_bpp = 0;
+	}
+	tga_w = stbi__get16le(s);
+	if (tga_w < 1) {
+		stbi__rewind(s);
+		return 0; // test width
+	}
+	tga_h = stbi__get16le(s);
+	if (tga_h < 1) {
+		stbi__rewind(s);
+		return 0; // test height
+	}
+	tga_bits_per_pixel = stbi__get8(s); // bits per pixel
+	stbi__get8(s);						// ignore alpha bits
+	if (tga_colormap_bpp != 0) {
+		if ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) {
+			// when using a colormap, tga_bits_per_pixel is the size of the
+			// indexes I don't think anything but 8 or 16bit indexes makes sense
+			stbi__rewind(s);
+			return 0;
+		}
+		tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL);
+	} else {
+		tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL);
+	}
+	if (!tga_comp) {
+		stbi__rewind(s);
+		return 0;
+	}
+	if (x)
+		*x = tga_w;
+	if (y)
+		*y = tga_h;
+	if (comp)
+		*comp = tga_comp;
+	return 1; // seems to have passed everything
+}
+
+static int stbi__tga_test(stbi__context* s) {
+	int res = 0;
+	int sz, tga_color_type;
+	stbi__get8(s);					//   discard Offset
+	tga_color_type = stbi__get8(s); //   color type
+	if (tga_color_type > 1)
+		goto errorEnd;		   //   only RGB or indexed allowed
+	sz = stbi__get8(s);		   //   image type
+	if (tga_color_type == 1) { // colormapped (paletted) image
+		if (sz != 1 && sz != 9)
+			goto errorEnd; // colortype 1 demands image type 1 or 9
+		stbi__skip(s,
+				   4);		// skip index of first colormap entry and number of entries
+		sz = stbi__get8(s); //   check bits per palette color entry
+		if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32))
+			goto errorEnd;
+		stbi__skip(s, 4); // skip image x and y origin
+	} else {			  // "normal" image w/o colormap
+		if ((sz != 2) && (sz != 3) && (sz != 10) && (sz != 11))
+			goto errorEnd; // only RGB or grey allowed, +/- RLE
+		stbi__skip(s, 9);  // skip colormap specification and image x/y origin
+	}
+	if (stbi__get16le(s) < 1)
+		goto errorEnd; //   test width
+	if (stbi__get16le(s) < 1)
+		goto errorEnd;  //   test height
+	sz = stbi__get8(s); //   bits per pixel
+	if ((tga_color_type == 1) && (sz != 8) && (sz != 16))
+		goto errorEnd; // for colormapped images, bpp is size of an index
+	if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32))
+		goto errorEnd;
+
+	res = 1; // if we got this far, everything's good and we can return 1
+			 // instead of 0
+
+errorEnd:
+	stbi__rewind(s);
+	return res;
+}
+
+// read 16bit value and convert to 24bit RGB
+static void stbi__tga_read_rgb16(stbi__context* s, stbi_uc* out) {
+	stbi__uint16 px = (stbi__uint16)stbi__get16le(s);
+	stbi__uint16 fiveBitMask = 31;
+	// we have 3 channels with 5bits each
+	int r = (px >> 10) & fiveBitMask;
+	int g = (px >> 5) & fiveBitMask;
+	int b = px & fiveBitMask;
+	// Note that this saves the data in RGB(A) order, so it doesn't need to be
+	// swapped later
+	out[0] = (stbi_uc)((r * 255) / 31);
+	out[1] = (stbi_uc)((g * 255) / 31);
+	out[2] = (stbi_uc)((b * 255) / 31);
+
+	// some people claim that the most significant bit might be used for alpha
+	// (possibly if an alpha-bit is set in the "image descriptor byte")
+	// but that only made 16bit test images completely translucent..
+	// so let's treat all 15 and 16bit TGAs as RGB with no alpha.
+}
+
+static void* stbi__tga_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
+	//   read in the TGA header stuff
+	int tga_offset = stbi__get8(s);
+	int tga_indexed = stbi__get8(s);
+	int tga_image_type = stbi__get8(s);
+	int tga_is_RLE = 0;
+	int tga_palette_start = stbi__get16le(s);
+	int tga_palette_len = stbi__get16le(s);
+	int tga_palette_bits = stbi__get8(s);
+	int tga_x_origin = stbi__get16le(s);
+	int tga_y_origin = stbi__get16le(s);
+	int tga_width = stbi__get16le(s);
+	int tga_height = stbi__get16le(s);
+	int tga_bits_per_pixel = stbi__get8(s);
+	int tga_comp, tga_rgb16 = 0;
+	int tga_inverted = stbi__get8(s);
+	// int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused
+	// (useless?)
+	//   image data
+	unsigned char* tga_data;
+	unsigned char* tga_palette = NULL;
+	int i, j;
+	unsigned char raw_data[4] = {0};
+	int RLE_count = 0;
+	int RLE_repeating = 0;
+	int read_next_pixel = 1;
+	STBI_NOTUSED(ri);
+	STBI_NOTUSED(tga_x_origin); // @TODO
+	STBI_NOTUSED(tga_y_origin); // @TODO
+
+	//   do a tiny bit of precessing
+	if (tga_image_type >= 8) {
+		tga_image_type -= 8;
+		tga_is_RLE = 1;
+	}
+	tga_inverted = 1 - ((tga_inverted >> 5) & 1);
+
+	//   If I'm paletted, then I'll use the number of bits from the palette
+	if (tga_indexed)
+		tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
+	else
+		tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16);
+
+	if (!tga_comp) // shouldn't really happen, stbi__tga_test() should have
+				   // ensured basic consistency
+		return stbi__errpuc("bad format", "Can't find out TGA pixelformat");
+
+	//   tga info
+	*x = tga_width;
+	*y = tga_height;
+	if (comp)
+		*comp = tga_comp;
+
+	if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0))
+		return stbi__errpuc("too large", "Corrupt TGA");
+
+	tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
+	if (!tga_data)
+		return stbi__errpuc("outofmem", "Out of memory");
+
+	// skip to the data's starting position (offset usually = 0)
+	stbi__skip(s, tga_offset);
+
+	if (!tga_indexed && !tga_is_RLE && !tga_rgb16) {
+		for (i = 0; i < tga_height; ++i) {
+			int row = tga_inverted ? tga_height - i - 1 : i;
+			stbi_uc* tga_row = tga_data + row * tga_width * tga_comp;
+			stbi__getn(s, tga_row, tga_width * tga_comp);
+		}
+	} else {
+		//   do I need to load a palette?
+		if (tga_indexed) {
+			//   any data to skip? (offset usually = 0)
+			stbi__skip(s, tga_palette_start);
+			//   load the palette
+			tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
+			if (!tga_palette) {
+				STBI_FREE(tga_data);
+				return stbi__errpuc("outofmem", "Out of memory");
+			}
+			if (tga_rgb16) {
+				stbi_uc* pal_entry = tga_palette;
+				STBI_ASSERT(tga_comp == STBI_rgb);
+				for (i = 0; i < tga_palette_len; ++i) {
+					stbi__tga_read_rgb16(s, pal_entry);
+					pal_entry += tga_comp;
+				}
+			} else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) {
+				STBI_FREE(tga_data);
+				STBI_FREE(tga_palette);
+				return stbi__errpuc("bad palette", "Corrupt TGA");
+			}
+		}
+		//   load the data
+		for (i = 0; i < tga_width * tga_height; ++i) {
+			//   if I'm in RLE mode, do I need to get a RLE stbi__pngchunk?
+			if (tga_is_RLE) {
+				if (RLE_count == 0) {
+					//   yep, get the next byte as a RLE command
+					int RLE_cmd = stbi__get8(s);
+					RLE_count = 1 + (RLE_cmd & 127);
+					RLE_repeating = RLE_cmd >> 7;
+					read_next_pixel = 1;
+				} else if (!RLE_repeating) {
+					read_next_pixel = 1;
+				}
+			} else {
+				read_next_pixel = 1;
+			}
+			//   OK, if I need to read a pixel, do it now
+			if (read_next_pixel) {
+				//   load however much data we did have
+				if (tga_indexed) {
+					// read in index, then perform the lookup
+					int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s);
+					if (pal_idx >= tga_palette_len) {
+						// invalid index
+						pal_idx = 0;
+					}
+					pal_idx *= tga_comp;
+					for (j = 0; j < tga_comp; ++j) {
+						raw_data[j] = tga_palette[pal_idx + j];
+					}
+				} else if (tga_rgb16) {
+					STBI_ASSERT(tga_comp == STBI_rgb);
+					stbi__tga_read_rgb16(s, raw_data);
+				} else {
+					//   read in the data raw
+					for (j = 0; j < tga_comp; ++j) {
+						raw_data[j] = stbi__get8(s);
+					}
+				}
+				//   clear the reading flag for the next pixel
+				read_next_pixel = 0;
+			} // end of reading a pixel
+
+			// copy data
+			for (j = 0; j < tga_comp; ++j)
+				tga_data[i * tga_comp + j] = raw_data[j];
+
+			//   in case we're in RLE mode, keep counting down
+			--RLE_count;
+		}
+		//   do I need to invert the image?
+		if (tga_inverted) {
+			for (j = 0; j * 2 < tga_height; ++j) {
+				int index1 = j * tga_width * tga_comp;
+				int index2 = (tga_height - 1 - j) * tga_width * tga_comp;
+				for (i = tga_width * tga_comp; i > 0; --i) {
+					unsigned char temp = tga_data[index1];
+					tga_data[index1] = tga_data[index2];
+					tga_data[index2] = temp;
+					++index1;
+					++index2;
+				}
+			}
+		}
+		//   clear my palette, if I had one
+		if (tga_palette != NULL) {
+			STBI_FREE(tga_palette);
+		}
+	}
+
+	// swap RGB - if the source data was RGB16, it already is in the right order
+	if (tga_comp >= 3 && !tga_rgb16) {
+		unsigned char* tga_pixel = tga_data;
+		for (i = 0; i < tga_width * tga_height; ++i) {
+			unsigned char temp = tga_pixel[0];
+			tga_pixel[0] = tga_pixel[2];
+			tga_pixel[2] = temp;
+			tga_pixel += tga_comp;
+		}
+	}
+
+	// convert to target component count
+	if (req_comp && req_comp != tga_comp)
+		tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height);
+
+	//   the things I do to get rid of an error message, and yet keep
+	//   Microsoft's C compilers happy... [8^(
+	tga_palette_start = tga_palette_len = tga_palette_bits = tga_x_origin = tga_y_origin = 0;
+	STBI_NOTUSED(tga_palette_start);
+	//   OK, done
+	return tga_data;
+}
+#endif
+
+// *************************************************************************************************
+// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz,
+// tweaked by STB
+
+#ifndef STBI_NO_PSD
+static int stbi__psd_test(stbi__context* s) {
+	int r = (stbi__get32be(s) == 0x38425053);
+	stbi__rewind(s);
+	return r;
+}
+
+static int stbi__psd_decode_rle(stbi__context* s, stbi_uc* p, int pixelCount) {
+	int count, nleft, len;
+
+	count = 0;
+	while ((nleft = pixelCount - count) > 0) {
+		len = stbi__get8(s);
+		if (len == 128) {
+			// No-op.
+		} else if (len < 128) {
+			// Copy next len+1 bytes literally.
+			len++;
+			if (len > nleft)
+				return 0; // corrupt data
+			count += len;
+			while (len) {
+				*p = stbi__get8(s);
+				p += 4;
+				len--;
+			}
+		} else if (len > 128) {
+			stbi_uc val;
+			// Next -len+1 bytes in the dest are replicated from next source
+			// byte. (Interpret len as a negative 8-bit int.)
+			len = 257 - len;
+			if (len > nleft)
+				return 0; // corrupt data
+			val = stbi__get8(s);
+			count += len;
+			while (len) {
+				*p = val;
+				p += 4;
+				len--;
+			}
+		}
+	}
+
+	return 1;
+}
+
+static void* stbi__psd_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc) {
+	int pixelCount;
+	int channelCount, compression;
+	int channel, i;
+	int bitdepth;
+	int w, h;
+	stbi_uc* out;
+	STBI_NOTUSED(ri);
+
+	// Check identifier
+	if (stbi__get32be(s) != 0x38425053) // "8BPS"
+		return stbi__errpuc("not PSD", "Corrupt PSD image");
+
+	// Check file type version.
+	if (stbi__get16be(s) != 1)
+		return stbi__errpuc("wrong version", "Unsupported version of PSD image");
+
+	// Skip 6 reserved bytes.
+	stbi__skip(s, 6);
+
+	// Read the number of channels (R, G, B, A, etc).
+	channelCount = stbi__get16be(s);
+	if (channelCount < 0 || channelCount > 16)
+		return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image");
+
+	// Read the rows and columns of the image.
+	h = stbi__get32be(s);
+	w = stbi__get32be(s);
+
+	// Make sure the depth is 8 bits.
+	bitdepth = stbi__get16be(s);
+	if (bitdepth != 8 && bitdepth != 16)
+		return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit");
+
+	// Make sure the color mode is RGB.
+	// Valid options are:
+	//   0: Bitmap
+	//   1: Grayscale
+	//   2: Indexed color
+	//   3: RGB color
+	//   4: CMYK color
+	//   7: Multichannel
+	//   8: Duotone
+	//   9: Lab color
+	if (stbi__get16be(s) != 3)
+		return stbi__errpuc("wrong color format", "PSD is not in RGB color format");
+
+	// Skip the Mode Data.  (It's the palette for indexed color; other info for
+	// other modes.)
+	stbi__skip(s, stbi__get32be(s));
+
+	// Skip the image resources.  (resolution, pen tool paths, etc)
+	stbi__skip(s, stbi__get32be(s));
+
+	// Skip the reserved data.
+	stbi__skip(s, stbi__get32be(s));
+
+	// Find out if the data is compressed.
+	// Known values:
+	//   0: no compression
+	//   1: RLE compressed
+	compression = stbi__get16be(s);
+	if (compression > 1)
+		return stbi__errpuc("bad compression", "PSD has an unknown compression format");
+
+	// Check size
+	if (!stbi__mad3sizes_valid(4, w, h, 0))
+		return stbi__errpuc("too large", "Corrupt PSD");
+
+	// Create the destination image.
+
+	if (!compression && bitdepth == 16 && bpc == 16) {
+		out = (stbi_uc*)stbi__malloc_mad3(8, w, h, 0);
+		ri->bits_per_channel = 16;
+	} else
+		out = (stbi_uc*)stbi__malloc(4 * w * h);
+
+	if (!out)
+		return stbi__errpuc("outofmem", "Out of memory");
+	pixelCount = w * h;
+
+	// Initialize the data to zero.
+	// memset( out, 0, pixelCount * 4 );
+
+	// Finally, the image data.
+	if (compression) {
+		// RLE as used by .PSD and .TIFF
+		// Loop until you get the number of unpacked bytes you are expecting:
+		//     Read the next source byte into n.
+		//     If n is between 0 and 127 inclusive, copy the next n+1 bytes
+		//     literally. Else if n is between -127 and -1 inclusive, copy the
+		//     next byte -n+1 times. Else if n is 128, noop.
+		// Endloop
+
+		// The RLE-compressed data is preceded by a 2-byte data count for each
+		// row in the data, which we're going to just skip.
+		stbi__skip(s, h * channelCount * 2);
+
+		// Read the RLE data by channel.
+		for (channel = 0; channel < 4; channel++) {
+			stbi_uc* p;
+
+			p = out + channel;
+			if (channel >= channelCount) {
+				// Fill this channel with default data.
+				for (i = 0; i < pixelCount; i++, p += 4)
+					*p = (channel == 3 ? 255 : 0);
+			} else {
+				// Read the RLE data.
+				if (!stbi__psd_decode_rle(s, p, pixelCount)) {
+					STBI_FREE(out);
+					return stbi__errpuc("corrupt", "bad RLE data");
+				}
+			}
+		}
+
+	} else {
+		// We're at the raw image data.  It's each channel in order (Red, Green,
+		// Blue, Alpha, ...) where each channel consists of an 8-bit (or 16-bit)
+		// value for each pixel in the image.
+
+		// Read the data by channel.
+		for (channel = 0; channel < 4; channel++) {
+			if (channel >= channelCount) {
+				// Fill this channel with default data.
+				if (bitdepth == 16 && bpc == 16) {
+					stbi__uint16* q = ((stbi__uint16*)out) + channel;
+					stbi__uint16 val = channel == 3 ? 65535 : 0;
+					for (i = 0; i < pixelCount; i++, q += 4)
+						*q = val;
+				} else {
+					stbi_uc* p = out + channel;
+					stbi_uc val = channel == 3 ? 255 : 0;
+					for (i = 0; i < pixelCount; i++, p += 4)
+						*p = val;
+				}
+			} else {
+				if (ri->bits_per_channel == 16) { // output bpc
+					stbi__uint16* q = ((stbi__uint16*)out) + channel;
+					for (i = 0; i < pixelCount; i++, q += 4)
+						*q = (stbi__uint16)stbi__get16be(s);
+				} else {
+					stbi_uc* p = out + channel;
+					if (bitdepth == 16) { // input bpc
+						for (i = 0; i < pixelCount; i++, p += 4)
+							*p = (stbi_uc)(stbi__get16be(s) >> 8);
+					} else {
+						for (i = 0; i < pixelCount; i++, p += 4)
+							*p = stbi__get8(s);
+					}
+				}
+			}
+		}
+	}
+
+	// remove weird white matte from PSD
+	if (channelCount >= 4) {
+		if (ri->bits_per_channel == 16) {
+			for (i = 0; i < w * h; ++i) {
+				stbi__uint16* pixel = (stbi__uint16*)out + 4 * i;
+				if (pixel[3] != 0 && pixel[3] != 65535) {
+					float a = pixel[3] / 65535.0f;
+					float ra = 1.0f / a;
+					float inv_a = 65535.0f * (1 - ra);
+					pixel[0] = (stbi__uint16)(pixel[0] * ra + inv_a);
+					pixel[1] = (stbi__uint16)(pixel[1] * ra + inv_a);
+					pixel[2] = (stbi__uint16)(pixel[2] * ra + inv_a);
+				}
+			}
+		} else {
+			for (i = 0; i < w * h; ++i) {
+				unsigned char* pixel = out + 4 * i;
+				if (pixel[3] != 0 && pixel[3] != 255) {
+					float a = pixel[3] / 255.0f;
+					float ra = 1.0f / a;
+					float inv_a = 255.0f * (1 - ra);
+					pixel[0] = (unsigned char)(pixel[0] * ra + inv_a);
+					pixel[1] = (unsigned char)(pixel[1] * ra + inv_a);
+					pixel[2] = (unsigned char)(pixel[2] * ra + inv_a);
+				}
+			}
+		}
+	}
+
+	// convert to desired output format
+	if (req_comp && req_comp != 4) {
+		if (ri->bits_per_channel == 16)
+			out = (stbi_uc*)stbi__convert_format16((stbi__uint16*)out, 4, req_comp, w, h);
+		else
+			out = stbi__convert_format(out, 4, req_comp, w, h);
+		if (out == NULL)
+			return out; // stbi__convert_format frees input on failure
+	}
+
+	if (comp)
+		*comp = 4;
+	*y = h;
+	*x = w;
+
+	return out;
+}
+#endif
+
+// *************************************************************************************************
+// Softimage PIC loader
+// by Tom Seddon
+//
+// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format
+// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/
+
+#ifndef STBI_NO_PIC
+static int stbi__pic_is4(stbi__context* s, const char* str) {
+	int i;
+	for (i = 0; i < 4; ++i)
+		if (stbi__get8(s) != (stbi_uc)str[i])
+			return 0;
+
+	return 1;
+}
+
+static int stbi__pic_test_core(stbi__context* s) {
+	int i;
+
+	if (!stbi__pic_is4(s, "\x53\x80\xF6\x34"))
+		return 0;
+
+	for (i = 0; i < 84; ++i)
+		stbi__get8(s);
+
+	if (!stbi__pic_is4(s, "PICT"))
+		return 0;
+
+	return 1;
+}
+
+typedef struct {
+	stbi_uc size, type, channel;
+} stbi__pic_packet;
+
+static stbi_uc* stbi__readval(stbi__context* s, int channel, stbi_uc* dest) {
+	int mask = 0x80, i;
+
+	for (i = 0; i < 4; ++i, mask >>= 1) {
+		if (channel & mask) {
+			if (stbi__at_eof(s))
+				return stbi__errpuc("bad file", "PIC file too short");
+			dest[i] = stbi__get8(s);
+		}
+	}
+
+	return dest;
+}
+
+static void stbi__copyval(int channel, stbi_uc* dest, const stbi_uc* src) {
+	int mask = 0x80, i;
+
+	for (i = 0; i < 4; ++i, mask >>= 1)
+		if (channel & mask)
+			dest[i] = src[i];
+}
+
+static stbi_uc* stbi__pic_load_core(stbi__context* s, int width, int height, int* comp, stbi_uc* result) {
+	int act_comp = 0, num_packets = 0, y, chained;
+	stbi__pic_packet packets[10];
+
+	// this will (should...) cater for even some bizarre stuff like having data
+	// for the same channel in multiple packets.
+	do {
+		stbi__pic_packet* packet;
+
+		if (num_packets == sizeof(packets) / sizeof(packets[0]))
+			return stbi__errpuc("bad format", "too many packets");
+
+		packet = &packets[num_packets++];
+
+		chained = stbi__get8(s);
+		packet->size = stbi__get8(s);
+		packet->type = stbi__get8(s);
+		packet->channel = stbi__get8(s);
+
+		act_comp |= packet->channel;
+
+		if (stbi__at_eof(s))
+			return stbi__errpuc("bad file", "file too short (reading packets)");
+		if (packet->size != 8)
+			return stbi__errpuc("bad format", "packet isn't 8bpp");
+	} while (chained);
+
+	*comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel?
+
+	for (y = 0; y < height; ++y) {
+		int packet_idx;
+
+		for (packet_idx = 0; packet_idx < num_packets; ++packet_idx) {
+			stbi__pic_packet* packet = &packets[packet_idx];
+			stbi_uc* dest = result + y * width * 4;
+
+			switch (packet->type) {
+			default:
+				return stbi__errpuc("bad format", "packet has bad compression type");
+
+			case 0: { // uncompressed
+				int x;
+
+				for (x = 0; x < width; ++x, dest += 4)
+					if (!stbi__readval(s, packet->channel, dest))
+						return 0;
+				break;
+			}
+
+			case 1: // Pure RLE
+			{
+				int left = width, i;
+
+				while (left > 0) {
+					stbi_uc count, value[4];
+
+					count = stbi__get8(s);
+					if (stbi__at_eof(s))
+						return stbi__errpuc("bad file", "file too short (pure read count)");
+
+					if (count > left)
+						count = (stbi_uc)left;
+
+					if (!stbi__readval(s, packet->channel, value))
+						return 0;
+
+					for (i = 0; i < count; ++i, dest += 4)
+						stbi__copyval(packet->channel, dest, value);
+					left -= count;
+				}
+			} break;
+
+			case 2: { // Mixed RLE
+				int left = width;
+				while (left > 0) {
+					int count = stbi__get8(s), i;
+					if (stbi__at_eof(s))
+						return stbi__errpuc("bad file", "file too short (mixed read count)");
+
+					if (count >= 128) { // Repeated
+						stbi_uc value[4];
+
+						if (count == 128)
+							count = stbi__get16be(s);
+						else
+							count -= 127;
+						if (count > left)
+							return stbi__errpuc("bad file", "scanline overrun");
+
+						if (!stbi__readval(s, packet->channel, value))
+							return 0;
+
+						for (i = 0; i < count; ++i, dest += 4)
+							stbi__copyval(packet->channel, dest, value);
+					} else { // Raw
+						++count;
+						if (count > left)
+							return stbi__errpuc("bad file", "scanline overrun");
+
+						for (i = 0; i < count; ++i, dest += 4)
+							if (!stbi__readval(s, packet->channel, dest))
+								return 0;
+					}
+					left -= count;
+				}
+				break;
+			}
+			}
+		}
+	}
+
+	return result;
+}
+
+static void* stbi__pic_load(stbi__context* s, int* px, int* py, int* comp, int req_comp, stbi__result_info* ri) {
+	stbi_uc* result;
+	int i, x, y, internal_comp;
+	STBI_NOTUSED(ri);
+
+	if (!comp)
+		comp = &internal_comp;
+
+	for (i = 0; i < 92; ++i)
+		stbi__get8(s);
+
+	x = stbi__get16be(s);
+	y = stbi__get16be(s);
+	if (stbi__at_eof(s))
+		return stbi__errpuc("bad file", "file too short (pic header)");
+	if (!stbi__mad3sizes_valid(x, y, 4, 0))
+		return stbi__errpuc("too large", "PIC image too large to decode");
+
+	stbi__get32be(s); // skip `ratio'
+	stbi__get16be(s); // skip `fields'
+	stbi__get16be(s); // skip `pad'
+
+	// intermediate buffer is RGBA
+	result = (stbi_uc*)stbi__malloc_mad3(x, y, 4, 0);
+	memset(result, 0xff, x * y * 4);
+
+	if (!stbi__pic_load_core(s, x, y, comp, result)) {
+		STBI_FREE(result);
+		result = 0;
+	}
+	*px = x;
+	*py = y;
+	if (req_comp == 0)
+		req_comp = *comp;
+	result = stbi__convert_format(result, 4, req_comp, x, y);
+
+	return result;
+}
+
+static int stbi__pic_test(stbi__context* s) {
+	int r = stbi__pic_test_core(s);
+	stbi__rewind(s);
+	return r;
+}
+#endif
+
+// *************************************************************************************************
+// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb
+
+#ifndef STBI_NO_GIF
+typedef struct {
+	stbi__int16 prefix;
+	stbi_uc first;
+	stbi_uc suffix;
+} stbi__gif_lzw;
+
+typedef struct {
+	int w, h;
+	stbi_uc* out;		 // output buffer (always 4 components)
+	stbi_uc* background; // The current "background" as far as a gif is concerned
+	stbi_uc* history;
+	int flags, bgindex, ratio, transparent, eflags;
+	stbi_uc pal[256][4];
+	stbi_uc lpal[256][4];
+	stbi__gif_lzw codes[8192];
+	stbi_uc* color_table;
+	int parse, step;
+	int lflags;
+	int start_x, start_y;
+	int max_x, max_y;
+	int cur_x, cur_y;
+	int line_size;
+	int delay;
+} stbi__gif;
+
+static int stbi__gif_test_raw(stbi__context* s) {
+	int sz;
+	if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8')
+		return 0;
+	sz = stbi__get8(s);
+	if (sz != '9' && sz != '7')
+		return 0;
+	if (stbi__get8(s) != 'a')
+		return 0;
+	return 1;
+}
+
+static int stbi__gif_test(stbi__context* s) {
+	int r = stbi__gif_test_raw(s);
+	stbi__rewind(s);
+	return r;
+}
+
+static void stbi__gif_parse_colortable(stbi__context* s, stbi_uc pal[256][4], int num_entries, int transp) {
+	int i;
+	for (i = 0; i < num_entries; ++i) {
+		pal[i][2] = stbi__get8(s);
+		pal[i][1] = stbi__get8(s);
+		pal[i][0] = stbi__get8(s);
+		pal[i][3] = transp == i ? 0 : 255;
+	}
+}
+
+static int stbi__gif_header(stbi__context* s, stbi__gif* g, int* comp, int is_info) {
+	stbi_uc version;
+	if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8')
+		return stbi__err("not GIF", "Corrupt GIF");
+
+	version = stbi__get8(s);
+	if (version != '7' && version != '9')
+		return stbi__err("not GIF", "Corrupt GIF");
+	if (stbi__get8(s) != 'a')
+		return stbi__err("not GIF", "Corrupt GIF");
+
+	stbi__g_failure_reason = "";
+	g->w = stbi__get16le(s);
+	g->h = stbi__get16le(s);
+	g->flags = stbi__get8(s);
+	g->bgindex = stbi__get8(s);
+	g->ratio = stbi__get8(s);
+	g->transparent = -1;
+
+	if (comp != 0)
+		*comp = 4; // can't actually tell whether it's 3 or 4 until we parse the
+				   // comments
+
+	if (is_info)
+		return 1;
+
+	if (g->flags & 0x80)
+		stbi__gif_parse_colortable(s, g->pal, 2 << (g->flags & 7), -1);
+
+	return 1;
+}
+
+static int stbi__gif_info_raw(stbi__context* s, int* x, int* y, int* comp) {
+	stbi__gif* g = (stbi__gif*)stbi__malloc(sizeof(stbi__gif));
+	if (!stbi__gif_header(s, g, comp, 1)) {
+		STBI_FREE(g);
+		stbi__rewind(s);
+		return 0;
+	}
+	if (x)
+		*x = g->w;
+	if (y)
+		*y = g->h;
+	STBI_FREE(g);
+	return 1;
+}
+
+static void stbi__out_gif_code(stbi__gif* g, stbi__uint16 code) {
+	stbi_uc *p, *c;
+	int idx;
+
+	// recurse to decode the prefixes, since the linked-list is backwards,
+	// and working backwards through an interleaved image would be nasty
+	if (g->codes[code].prefix >= 0)
+		stbi__out_gif_code(g, g->codes[code].prefix);
+
+	if (g->cur_y >= g->max_y)
+		return;
+
+	idx = g->cur_x + g->cur_y;
+	p = &g->out[idx];
+	g->history[idx / 4] = 1;
+
+	c = &g->color_table[g->codes[code].suffix * 4];
+	if (c[3] > 128) { // don't render transparent pixels;
+		p[0] = c[2];
+		p[1] = c[1];
+		p[2] = c[0];
+		p[3] = c[3];
+	}
+	g->cur_x += 4;
+
+	if (g->cur_x >= g->max_x) {
+		g->cur_x = g->start_x;
+		g->cur_y += g->step;
+
+		while (g->cur_y >= g->max_y && g->parse > 0) {
+			g->step = (1 << g->parse) * g->line_size;
+			g->cur_y = g->start_y + (g->step >> 1);
+			--g->parse;
+		}
+	}
+}
+
+static stbi_uc* stbi__process_gif_raster(stbi__context* s, stbi__gif* g) {
+	stbi_uc lzw_cs;
+	stbi__int32 len, init_code;
+	stbi__uint32 first;
+	stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear;
+	stbi__gif_lzw* p;
+
+	lzw_cs = stbi__get8(s);
+	if (lzw_cs > 12)
+		return NULL;
+	clear = 1 << lzw_cs;
+	first = 1;
+	codesize = lzw_cs + 1;
+	codemask = (1 << codesize) - 1;
+	bits = 0;
+	valid_bits = 0;
+	for (init_code = 0; init_code < clear; init_code++) {
+		g->codes[init_code].prefix = -1;
+		g->codes[init_code].first = (stbi_uc)init_code;
+		g->codes[init_code].suffix = (stbi_uc)init_code;
+	}
+
+	// support no starting clear code
+	avail = clear + 2;
+	oldcode = -1;
+
+	len = 0;
+	for (;;) {
+		if (valid_bits < codesize) {
+			if (len == 0) {
+				len = stbi__get8(s); // start new block
+				if (len == 0)
+					return g->out;
+			}
+			--len;
+			bits |= (stbi__int32)stbi__get8(s) << valid_bits;
+			valid_bits += 8;
+		} else {
+			stbi__int32 code = bits & codemask;
+			bits >>= codesize;
+			valid_bits -= codesize;
+			// @OPTIMIZE: is there some way we can accelerate the non-clear
+			// path?
+			if (code == clear) { // clear code
+				codesize = lzw_cs + 1;
+				codemask = (1 << codesize) - 1;
+				avail = clear + 2;
+				oldcode = -1;
+				first = 0;
+			} else if (code == clear + 1) { // end of stream code
+				stbi__skip(s, len);
+				while ((len = stbi__get8(s)) > 0)
+					stbi__skip(s, len);
+				return g->out;
+			} else if (code <= avail) {
+				if (first) {
+					return stbi__errpuc("no clear code", "Corrupt GIF");
+				}
+
+				if (oldcode >= 0) {
+					p = &g->codes[avail++];
+					if (avail > 8192) {
+						return stbi__errpuc("too many codes", "Corrupt GIF");
+					}
+
+					p->prefix = (stbi__int16)oldcode;
+					p->first = g->codes[oldcode].first;
+					p->suffix = (code == avail) ? p->first : g->codes[code].first;
+				} else if (code == avail)
+					return stbi__errpuc("illegal code in raster", "Corrupt GIF");
+
+				stbi__out_gif_code(g, (stbi__uint16)code);
+
+				if ((avail & codemask) == 0 && avail <= 0x0FFF) {
+					codesize++;
+					codemask = (1 << codesize) - 1;
+				}
+
+				oldcode = code;
+			} else {
+				return stbi__errpuc("illegal code in raster", "Corrupt GIF");
+			}
+		}
+	}
+}
+
+// this function is designed to support animated gifs, although stb_image
+// doesn't support it two back is the image from two frames ago, used for a very
+// specific disposal format
+static stbi_uc* stbi__gif_load_next(stbi__context* s, stbi__gif* g, int* comp, int req_comp, stbi_uc* two_back) {
+	int dispose;
+	int first_frame;
+	int pi;
+	int pcount;
+	STBI_NOTUSED(req_comp);
+
+	// on first frame, any non-written pixels get the background colour
+	// (non-transparent)
+	first_frame = 0;
+	if (g->out == 0) {
+		if (!stbi__gif_header(s, g, comp, 0))
+			return 0; // stbi__g_failure_reason set by stbi__gif_header
+		if (!stbi__mad3sizes_valid(4, g->w, g->h, 0))
+			return stbi__errpuc("too large", "GIF image is too large");
+		pcount = g->w * g->h;
+		g->out = (stbi_uc*)stbi__malloc(4 * pcount);
+		g->background = (stbi_uc*)stbi__malloc(4 * pcount);
+		g->history = (stbi_uc*)stbi__malloc(pcount);
+		if (!g->out || !g->background || !g->history)
+			return stbi__errpuc("outofmem", "Out of memory");
+
+		// image is treated as "transparent" at the start - ie, nothing
+		// overwrites the current background; background colour is only used for
+		// pixels that are not rendered first frame, after that "background"
+		// color refers to the color that was there the previous frame.
+		memset(g->out, 0x00, 4 * pcount);
+		memset(g->background, 0x00,
+			   4 * pcount); // state of the background (starts transparent)
+		memset(g->history, 0x00,
+			   pcount); // pixels that were affected previous frame
+		first_frame = 1;
+	} else {
+		// second frame - how do we dispoase of the previous one?
+		dispose = (g->eflags & 0x1C) >> 2;
+		pcount = g->w * g->h;
+
+		if ((dispose == 3) && (two_back == 0)) {
+			dispose = 2; // if I don't have an image to revert back to, default
+						 // to the old background
+		}
+
+		if (dispose == 3) { // use previous graphic
+			for (pi = 0; pi < pcount; ++pi) {
+				if (g->history[pi]) {
+					memcpy(&g->out[pi * 4], &two_back[pi * 4], 4);
+				}
+			}
+		} else if (dispose == 2) {
+			// restore what was changed last frame to background before that
+			// frame;
+			for (pi = 0; pi < pcount; ++pi) {
+				if (g->history[pi]) {
+					memcpy(&g->out[pi * 4], &g->background[pi * 4], 4);
+				}
+			}
+		} else {
+			// This is a non-disposal case eithe way, so just
+			// leave the pixels as is, and they will become the new background
+			// 1: do not dispose
+			// 0:  not specified.
+		}
+
+		// background is what out is after the undoing of the previou frame;
+		memcpy(g->background, g->out, 4 * g->w * g->h);
+	}
+
+	// clear my history;
+	memset(g->history, 0x00,
+		   g->w * g->h); // pixels that were affected previous frame
+
+	for (;;) {
+		int tag = stbi__get8(s);
+		switch (tag) {
+		case 0x2C: /* Image Descriptor */
+		{
+			stbi__int32 x, y, w, h;
+			stbi_uc* o;
+
+			x = stbi__get16le(s);
+			y = stbi__get16le(s);
+			w = stbi__get16le(s);
+			h = stbi__get16le(s);
+			if (((x + w) > (g->w)) || ((y + h) > (g->h)))
+				return stbi__errpuc("bad Image Descriptor", "Corrupt GIF");
+
+			g->line_size = g->w * 4;
+			g->start_x = x * 4;
+			g->start_y = y * g->line_size;
+			g->max_x = g->start_x + w * 4;
+			g->max_y = g->start_y + h * g->line_size;
+			g->cur_x = g->start_x;
+			g->cur_y = g->start_y;
+
+			// if the width of the specified rectangle is 0, that means
+			// we may not see *any* pixels or the image is malformed;
+			// to make sure this is caught, move the current y down to
+			// max_y (which is what out_gif_code checks).
+			if (w == 0)
+				g->cur_y = g->max_y;
+
+			g->lflags = stbi__get8(s);
+
+			if (g->lflags & 0x40) {
+				g->step = 8 * g->line_size; // first interlaced spacing
+				g->parse = 3;
+			} else {
+				g->step = g->line_size;
+				g->parse = 0;
+			}
+
+			if (g->lflags & 0x80) {
+				stbi__gif_parse_colortable(s, g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1);
+				g->color_table = (stbi_uc*)g->lpal;
+			} else if (g->flags & 0x80) {
+				g->color_table = (stbi_uc*)g->pal;
+			} else
+				return stbi__errpuc("missing color table", "Corrupt GIF");
+
+			o = stbi__process_gif_raster(s, g);
+			if (!o)
+				return NULL;
+
+			// if this was the first frame,
+			pcount = g->w * g->h;
+			if (first_frame && (g->bgindex > 0)) {
+				// if first frame, any pixel not drawn to gets the background
+				// color
+				for (pi = 0; pi < pcount; ++pi) {
+					if (g->history[pi] == 0) {
+						g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo
+													 // that; It will be reset next frame if need
+													 // be;
+						memcpy(&g->out[pi * 4], &g->pal[g->bgindex], 4);
+					}
+				}
+			}
+
+			return o;
+		}
+
+		case 0x21: // Comment Extension.
+		{
+			int len;
+			int ext = stbi__get8(s);
+			if (ext == 0xF9) { // Graphic Control Extension.
+				len = stbi__get8(s);
+				if (len == 4) {
+					g->eflags = stbi__get8(s);
+					g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second,
+													  // saving as 1/1000ths.
+
+					// unset old transparent
+					if (g->transparent >= 0) {
+						g->pal[g->transparent][3] = 255;
+					}
+					if (g->eflags & 0x01) {
+						g->transparent = stbi__get8(s);
+						if (g->transparent >= 0) {
+							g->pal[g->transparent][3] = 0;
+						}
+					} else {
+						// don't need transparent
+						stbi__skip(s, 1);
+						g->transparent = -1;
+					}
+				} else {
+					stbi__skip(s, len);
+					break;
+				}
+			}
+			while ((len = stbi__get8(s)) != 0) {
+				stbi__skip(s, len);
+			}
+			break;
+		}
+
+		case 0x3B:				// gif stream termination code
+			return (stbi_uc*)s; // using '1' causes warning on some compilers
+
+		default:
+			return stbi__errpuc("unknown code", "Corrupt GIF");
+		}
+	}
+}
+
+static void* stbi__load_gif_main(stbi__context* s, int** delays, int* x, int* y, int* z, int* comp, int req_comp) {
+	if (stbi__gif_test(s)) {
+		int layers = 0;
+		stbi_uc* u = 0;
+		stbi_uc* out = 0;
+		stbi_uc* two_back = 0;
+		stbi__gif g;
+		int stride;
+		memset(&g, 0, sizeof(g));
+		if (delays) {
+			*delays = 0;
+		}
+
+		do {
+			u = stbi__gif_load_next(s, &g, comp, req_comp, two_back);
+			if (u == (stbi_uc*)s)
+				u = 0; // end of animated gif marker
+
+			if (u) {
+				*x = g.w;
+				*y = g.h;
+				++layers;
+				stride = g.w * g.h * 4;
+
+				if (out) {
+					void* tmp = (stbi_uc*)STBI_REALLOC(out, layers * stride);
+					if (NULL == tmp) {
+						STBI_FREE(g.out);
+						STBI_FREE(g.history);
+						STBI_FREE(g.background);
+						return stbi__errpuc("outofmem", "Out of memory");
+					} else
+						out = (stbi_uc*)tmp;
+					if (delays) {
+						*delays = (int*)STBI_REALLOC(*delays, sizeof(int) * layers);
+					}
+				} else {
+					out = (stbi_uc*)stbi__malloc(layers * stride);
+					if (delays) {
+						*delays = (int*)stbi__malloc(layers * sizeof(int));
+					}
+				}
+				memcpy(out + ((layers - 1) * stride), u, stride);
+				if (layers >= 2) {
+					two_back = out - 2 * stride;
+				}
+
+				if (delays) {
+					(*delays)[layers - 1U] = g.delay;
+				}
+			}
+		} while (u != 0);
+
+		// free temp buffer;
+		STBI_FREE(g.out);
+		STBI_FREE(g.history);
+		STBI_FREE(g.background);
+
+		// do the final conversion after loading everything;
+		if (req_comp && req_comp != 4)
+			out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h);
+
+		*z = layers;
+		return out;
+	} else {
+		return stbi__errpuc("not GIF", "Image was not as a gif type.");
+	}
+}
+
+static void* stbi__gif_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
+	stbi_uc* u = 0;
+	stbi__gif g;
+	memset(&g, 0, sizeof(g));
+	STBI_NOTUSED(ri);
+
+	u = stbi__gif_load_next(s, &g, comp, req_comp, 0);
+	if (u == (stbi_uc*)s)
+		u = 0; // end of animated gif marker
+	if (u) {
+		*x = g.w;
+		*y = g.h;
+
+		// moved conversion to after successful load so that the same
+		// can be done for multiple frames.
+		if (req_comp && req_comp != 4)
+			u = stbi__convert_format(u, 4, req_comp, g.w, g.h);
+	} else if (g.out) {
+		// if there was an error and we allocated an image buffer, free it!
+		STBI_FREE(g.out);
+	}
+
+	// free buffers needed for multiple frame loading;
+	STBI_FREE(g.history);
+	STBI_FREE(g.background);
+
+	return u;
+}
+
+static int stbi__gif_info(stbi__context* s, int* x, int* y, int* comp) { return stbi__gif_info_raw(s, x, y, comp); }
+#endif
+
+// *************************************************************************************************
+// Radiance RGBE HDR loader
+// originally by Nicolas Schulz
+#ifndef STBI_NO_HDR
+static int stbi__hdr_test_core(stbi__context* s, const char* signature) {
+	int i;
+	for (i = 0; signature[i]; ++i)
+		if (stbi__get8(s) != signature[i])
+			return 0;
+	stbi__rewind(s);
+	return 1;
+}
+
+static int stbi__hdr_test(stbi__context* s) {
+	int r = stbi__hdr_test_core(s, "#?RADIANCE\n");
+	stbi__rewind(s);
+	if (!r) {
+		r = stbi__hdr_test_core(s, "#?RGBE\n");
+		stbi__rewind(s);
+	}
+	return r;
+}
+
+#define STBI__HDR_BUFLEN 1024
+static char* stbi__hdr_gettoken(stbi__context* z, char* buffer) {
+	int len = 0;
+	char c = '\0';
+
+	c = (char)stbi__get8(z);
+
+	while (!stbi__at_eof(z) && c != '\n') {
+		buffer[len++] = c;
+		if (len == STBI__HDR_BUFLEN - 1) {
+			// flush to end of line
+			while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
+				;
+			break;
+		}
+		c = (char)stbi__get8(z);
+	}
+
+	buffer[len] = 0;
+	return buffer;
+}
+
+static void stbi__hdr_convert(float* output, stbi_uc* input, int req_comp) {
+	if (input[3] != 0) {
+		float f1;
+		// Exponent
+		f1 = (float)ldexp(1.0f, input[3] - (int)(128 + 8));
+		if (req_comp <= 2)
+			output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
+		else {
+			output[0] = input[0] * f1;
+			output[1] = input[1] * f1;
+			output[2] = input[2] * f1;
+		}
+		if (req_comp == 2)
+			output[1] = 1;
+		if (req_comp == 4)
+			output[3] = 1;
+	} else {
+		switch (req_comp) {
+		case 4:
+			output[3] = 1; /* fallthrough */
+		case 3:
+			output[0] = output[1] = output[2] = 0;
+			break;
+		case 2:
+			output[1] = 1; /* fallthrough */
+		case 1:
+			output[0] = 0;
+			break;
+		}
+	}
+}
+
+static float* stbi__hdr_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
+	char buffer[STBI__HDR_BUFLEN];
+	char* token;
+	int valid = 0;
+	int width, height;
+	stbi_uc* scanline;
+	float* hdr_data;
+	int len;
+	unsigned char count, value;
+	int i, j, k, c1, c2, z;
+	const char* headerToken;
+	STBI_NOTUSED(ri);
+
+	// Check identifier
+	headerToken = stbi__hdr_gettoken(s, buffer);
+	if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0)
+		return stbi__errpf("not HDR", "Corrupt HDR image");
+
+	// Parse header
+	for (;;) {
+		token = stbi__hdr_gettoken(s, buffer);
+		if (token[0] == 0)
+			break;
+		if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0)
+			valid = 1;
+	}
+
+	if (!valid)
+		return stbi__errpf("unsupported format", "Unsupported HDR format");
+
+	// Parse width and height
+	// can't use sscanf() if we're not using stdio!
+	token = stbi__hdr_gettoken(s, buffer);
+	if (strncmp(token, "-Y ", 3))
+		return stbi__errpf("unsupported data layout", "Unsupported HDR format");
+	token += 3;
+	height = (int)strtol(token, &token, 10);
+	while (*token == ' ')
+		++token;
+	if (strncmp(token, "+X ", 3))
+		return stbi__errpf("unsupported data layout", "Unsupported HDR format");
+	token += 3;
+	width = (int)strtol(token, NULL, 10);
+
+	*x = width;
+	*y = height;
+
+	if (comp)
+		*comp = 3;
+	if (req_comp == 0)
+		req_comp = 3;
+
+	if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0))
+		return stbi__errpf("too large", "HDR image is too large");
+
+	// Read data
+	hdr_data = (float*)stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0);
+	if (!hdr_data)
+		return stbi__errpf("outofmem", "Out of memory");
+
+	// Load image data
+	// image data is stored as some number of sca
+	if (width < 8 || width >= 32768) {
+		// Read flat data
+		for (j = 0; j < height; ++j) {
+			for (i = 0; i < width; ++i) {
+				stbi_uc rgbe[4];
+			main_decode_loop:
+				stbi__getn(s, rgbe, 4);
+				stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
+			}
+		}
+	} else {
+		// Read RLE-encoded data
+		scanline = NULL;
+
+		for (j = 0; j < height; ++j) {
+			c1 = stbi__get8(s);
+			c2 = stbi__get8(s);
+			len = stbi__get8(s);
+			if (c1 != 2 || c2 != 2 || (len & 0x80)) {
+				// not run-length encoded, so we have to actually use THIS data
+				// as a decoded pixel (note this can't be a valid pixel--one of
+				// RGB must be
+				// >= 128)
+				stbi_uc rgbe[4];
+				rgbe[0] = (stbi_uc)c1;
+				rgbe[1] = (stbi_uc)c2;
+				rgbe[2] = (stbi_uc)len;
+				rgbe[3] = (stbi_uc)stbi__get8(s);
+				stbi__hdr_convert(hdr_data, rgbe, req_comp);
+				i = 1;
+				j = 0;
+				STBI_FREE(scanline);
+				goto main_decode_loop; // yes, this makes no sense
+			}
+			len <<= 8;
+			len |= stbi__get8(s);
+			if (len != width) {
+				STBI_FREE(hdr_data);
+				STBI_FREE(scanline);
+				return stbi__errpf("invalid decoded scanline length", "corrupt HDR");
+			}
+			if (scanline == NULL) {
+				scanline = (stbi_uc*)stbi__malloc_mad2(width, 4, 0);
+				if (!scanline) {
+					STBI_FREE(hdr_data);
+					return stbi__errpf("outofmem", "Out of memory");
+				}
+			}
+
+			for (k = 0; k < 4; ++k) {
+				int nleft;
+				i = 0;
+				while ((nleft = width - i) > 0) {
+					count = stbi__get8(s);
+					if (count > 128) {
+						// Run
+						value = stbi__get8(s);
+						count -= 128;
+						if (count > nleft) {
+							STBI_FREE(hdr_data);
+							STBI_FREE(scanline);
+							return stbi__errpf("corrupt", "bad RLE data in HDR");
+						}
+						for (z = 0; z < count; ++z)
+							scanline[i++ * 4 + k] = value;
+					} else {
+						// Dump
+						if (count > nleft) {
+							STBI_FREE(hdr_data);
+							STBI_FREE(scanline);
+							return stbi__errpf("corrupt", "bad RLE data in HDR");
+						}
+						for (z = 0; z < count; ++z)
+							scanline[i++ * 4 + k] = stbi__get8(s);
+					}
+				}
+			}
+			for (i = 0; i < width; ++i)
+				stbi__hdr_convert(hdr_data + (j * width + i) * req_comp, scanline + i * 4, req_comp);
+		}
+		if (scanline)
+			STBI_FREE(scanline);
+	}
+
+	return hdr_data;
+}
+
+static int stbi__hdr_info(stbi__context* s, int* x, int* y, int* comp) {
+	char buffer[STBI__HDR_BUFLEN];
+	char* token;
+	int valid = 0;
+	int dummy;
+
+	if (!x)
+		x = &dummy;
+	if (!y)
+		y = &dummy;
+	if (!comp)
+		comp = &dummy;
+
+	if (stbi__hdr_test(s) == 0) {
+		stbi__rewind(s);
+		return 0;
+	}
+
+	for (;;) {
+		token = stbi__hdr_gettoken(s, buffer);
+		if (token[0] == 0)
+			break;
+		if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0)
+			valid = 1;
+	}
+
+	if (!valid) {
+		stbi__rewind(s);
+		return 0;
+	}
+	token = stbi__hdr_gettoken(s, buffer);
+	if (strncmp(token, "-Y ", 3)) {
+		stbi__rewind(s);
+		return 0;
+	}
+	token += 3;
+	*y = (int)strtol(token, &token, 10);
+	while (*token == ' ')
+		++token;
+	if (strncmp(token, "+X ", 3)) {
+		stbi__rewind(s);
+		return 0;
+	}
+	token += 3;
+	*x = (int)strtol(token, NULL, 10);
+	*comp = 3;
+	return 1;
+}
+#endif // STBI_NO_HDR
+
+#ifndef STBI_NO_BMP
+static int stbi__bmp_info(stbi__context* s, int* x, int* y, int* comp) {
+	void* p;
+	stbi__bmp_data info;
+
+	info.all_a = 255;
+	p = stbi__bmp_parse_header(s, &info);
+	stbi__rewind(s);
+	if (p == NULL)
+		return 0;
+	if (x)
+		*x = s->img_x;
+	if (y)
+		*y = s->img_y;
+	if (comp) {
+		if (info.bpp == 24 && info.ma == 0xff000000)
+			*comp = 3;
+		else
+			*comp = info.ma ? 4 : 3;
+	}
+	return 1;
+}
+#endif
+
+#ifndef STBI_NO_PSD
+static int stbi__psd_info(stbi__context* s, int* x, int* y, int* comp) {
+	int channelCount, dummy, depth;
+	if (!x)
+		x = &dummy;
+	if (!y)
+		y = &dummy;
+	if (!comp)
+		comp = &dummy;
+	if (stbi__get32be(s) != 0x38425053) {
+		stbi__rewind(s);
+		return 0;
+	}
+	if (stbi__get16be(s) != 1) {
+		stbi__rewind(s);
+		return 0;
+	}
+	stbi__skip(s, 6);
+	channelCount = stbi__get16be(s);
+	if (channelCount < 0 || channelCount > 16) {
+		stbi__rewind(s);
+		return 0;
+	}
+	*y = stbi__get32be(s);
+	*x = stbi__get32be(s);
+	depth = stbi__get16be(s);
+	if (depth != 8 && depth != 16) {
+		stbi__rewind(s);
+		return 0;
+	}
+	if (stbi__get16be(s) != 3) {
+		stbi__rewind(s);
+		return 0;
+	}
+	*comp = 4;
+	return 1;
+}
+
+static int stbi__psd_is16(stbi__context* s) {
+	int channelCount, depth;
+	if (stbi__get32be(s) != 0x38425053) {
+		stbi__rewind(s);
+		return 0;
+	}
+	if (stbi__get16be(s) != 1) {
+		stbi__rewind(s);
+		return 0;
+	}
+	stbi__skip(s, 6);
+	channelCount = stbi__get16be(s);
+	if (channelCount < 0 || channelCount > 16) {
+		stbi__rewind(s);
+		return 0;
+	}
+	(void)stbi__get32be(s);
+	(void)stbi__get32be(s);
+	depth = stbi__get16be(s);
+	if (depth != 16) {
+		stbi__rewind(s);
+		return 0;
+	}
+	return 1;
+}
+#endif
+
+#ifndef STBI_NO_PIC
+static int stbi__pic_info(stbi__context* s, int* x, int* y, int* comp) {
+	int act_comp = 0, num_packets = 0, chained, dummy;
+	stbi__pic_packet packets[10];
+
+	if (!x)
+		x = &dummy;
+	if (!y)
+		y = &dummy;
+	if (!comp)
+		comp = &dummy;
+
+	if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) {
+		stbi__rewind(s);
+		return 0;
+	}
+
+	stbi__skip(s, 88);
+
+	*x = stbi__get16be(s);
+	*y = stbi__get16be(s);
+	if (stbi__at_eof(s)) {
+		stbi__rewind(s);
+		return 0;
+	}
+	if ((*x) != 0 && (1 << 28) / (*x) < (*y)) {
+		stbi__rewind(s);
+		return 0;
+	}
+
+	stbi__skip(s, 8);
+
+	do {
+		stbi__pic_packet* packet;
+
+		if (num_packets == sizeof(packets) / sizeof(packets[0]))
+			return 0;
+
+		packet = &packets[num_packets++];
+		chained = stbi__get8(s);
+		packet->size = stbi__get8(s);
+		packet->type = stbi__get8(s);
+		packet->channel = stbi__get8(s);
+		act_comp |= packet->channel;
+
+		if (stbi__at_eof(s)) {
+			stbi__rewind(s);
+			return 0;
+		}
+		if (packet->size != 8) {
+			stbi__rewind(s);
+			return 0;
+		}
+	} while (chained);
+
+	*comp = (act_comp & 0x10 ? 4 : 3);
+
+	return 1;
+}
+#endif
+
+// *************************************************************************************************
+// Portable Gray Map and Portable Pixel Map loader
+// by Ken Miller
+//
+// PGM: http://netpbm.sourceforge.net/doc/pgm.html
+// PPM: http://netpbm.sourceforge.net/doc/ppm.html
+//
+// Known limitations:
+//    Does not support comments in the header section
+//    Does not support ASCII image data (formats P2 and P3)
+//    Does not support 16-bit-per-channel
+
+#ifndef STBI_NO_PNM
+
+static int stbi__pnm_test(stbi__context* s) {
+	char p, t;
+	p = (char)stbi__get8(s);
+	t = (char)stbi__get8(s);
+	if (p != 'P' || (t != '5' && t != '6')) {
+		stbi__rewind(s);
+		return 0;
+	}
+	return 1;
+}
+
+static void* stbi__pnm_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
+	stbi_uc* out;
+	STBI_NOTUSED(ri);
+
+	if (!stbi__pnm_info(s, (int*)&s->img_x, (int*)&s->img_y, (int*)&s->img_n))
+		return 0;
+
+	*x = s->img_x;
+	*y = s->img_y;
+	if (comp)
+		*comp = s->img_n;
+
+	if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0))
+		return stbi__errpuc("too large", "PNM too large");
+
+	out = (stbi_uc*)stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0);
+	if (!out)
+		return stbi__errpuc("outofmem", "Out of memory");
+	stbi__getn(s, out, s->img_n * s->img_x * s->img_y);
+
+	if (req_comp && req_comp != s->img_n) {
+		out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y);
+		if (out == NULL)
+			return out; // stbi__convert_format frees input on failure
+	}
+	return out;
+}
+
+static int stbi__pnm_isspace(char c) { return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; }
+
+static void stbi__pnm_skip_whitespace(stbi__context* s, char* c) {
+	for (;;) {
+		while (!stbi__at_eof(s) && stbi__pnm_isspace(*c))
+			*c = (char)stbi__get8(s);
+
+		if (stbi__at_eof(s) || *c != '#')
+			break;
+
+		while (!stbi__at_eof(s) && *c != '\n' && *c != '\r')
+			*c = (char)stbi__get8(s);
+	}
+}
+
+static int stbi__pnm_isdigit(char c) { return c >= '0' && c <= '9'; }
+
+static int stbi__pnm_getinteger(stbi__context* s, char* c) {
+	int value = 0;
+
+	while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) {
+		value = value * 10 + (*c - '0');
+		*c = (char)stbi__get8(s);
+	}
+
+	return value;
+}
+
+static int stbi__pnm_info(stbi__context* s, int* x, int* y, int* comp) {
+	int maxv, dummy;
+	char c, p, t;
+
+	if (!x)
+		x = &dummy;
+	if (!y)
+		y = &dummy;
+	if (!comp)
+		comp = &dummy;
+
+	stbi__rewind(s);
+
+	// Get identifier
+	p = (char)stbi__get8(s);
+	t = (char)stbi__get8(s);
+	if (p != 'P' || (t != '5' && t != '6')) {
+		stbi__rewind(s);
+		return 0;
+	}
+
+	*comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm
+
+	c = (char)stbi__get8(s);
+	stbi__pnm_skip_whitespace(s, &c);
+
+	*x = stbi__pnm_getinteger(s, &c); // read width
+	stbi__pnm_skip_whitespace(s, &c);
+
+	*y = stbi__pnm_getinteger(s, &c); // read height
+	stbi__pnm_skip_whitespace(s, &c);
+
+	maxv = stbi__pnm_getinteger(s, &c); // read max value
+
+	if (maxv > 255)
+		return stbi__err("max value > 255", "PPM image not 8-bit");
+	else
+		return 1;
+}
+#endif
+
+static int stbi__info_main(stbi__context* s, int* x, int* y, int* comp) {
+#ifndef STBI_NO_JPEG
+	if (stbi__jpeg_info(s, x, y, comp))
+		return 1;
+#endif
+
+#ifndef STBI_NO_PNG
+	if (stbi__png_info(s, x, y, comp))
+		return 1;
+#endif
+
+#ifndef STBI_NO_GIF
+	if (stbi__gif_info(s, x, y, comp))
+		return 1;
+#endif
+
+#ifndef STBI_NO_BMP
+	if (stbi__bmp_info(s, x, y, comp))
+		return 1;
+#endif
+
+#ifndef STBI_NO_PSD
+	if (stbi__psd_info(s, x, y, comp))
+		return 1;
+#endif
+
+#ifndef STBI_NO_PIC
+	if (stbi__pic_info(s, x, y, comp))
+		return 1;
+#endif
+
+#ifndef STBI_NO_PNM
+	if (stbi__pnm_info(s, x, y, comp))
+		return 1;
+#endif
+
+#ifndef STBI_NO_HDR
+	if (stbi__hdr_info(s, x, y, comp))
+		return 1;
+#endif
+
+// test tga last because it's a crappy test!
+#ifndef STBI_NO_TGA
+	if (stbi__tga_info(s, x, y, comp))
+		return 1;
+#endif
+	return stbi__err("unknown image type", "Image not of any known type, or corrupt");
+}
+
+static int stbi__is_16_main(stbi__context* s) {
+#ifndef STBI_NO_PNG
+	if (stbi__png_is16(s))
+		return 1;
+#endif
+
+#ifndef STBI_NO_PSD
+	if (stbi__psd_is16(s))
+		return 1;
+#endif
+
+	return 0;
+}
+
+#ifndef STBI_NO_STDIO
+STBIDEF int stbi_info(char const* filename, int* x, int* y, int* comp) {
+	FILE* f = stbi__fopen(filename, "rb");
+	int result;
+	if (!f)
+		return stbi__err("can't fopen", "Unable to open file");
+	result = stbi_info_from_file(f, x, y, comp);
+	fclose(f);
+	return result;
+}
+
+STBIDEF int stbi_info_from_file(FILE* f, int* x, int* y, int* comp) {
+	int r;
+	stbi__context s;
+	long pos = ftell(f);
+	stbi__start_file(&s, f);
+	r = stbi__info_main(&s, x, y, comp);
+	fseek(f, pos, SEEK_SET);
+	return r;
+}
+
+STBIDEF int stbi_is_16_bit(char const* filename) {
+	FILE* f = stbi__fopen(filename, "rb");
+	int result;
+	if (!f)
+		return stbi__err("can't fopen", "Unable to open file");
+	result = stbi_is_16_bit_from_file(f);
+	fclose(f);
+	return result;
+}
+
+STBIDEF int stbi_is_16_bit_from_file(FILE* f) {
+	int r;
+	stbi__context s;
+	long pos = ftell(f);
+	stbi__start_file(&s, f);
+	r = stbi__is_16_main(&s);
+	fseek(f, pos, SEEK_SET);
+	return r;
+}
+#endif // !STBI_NO_STDIO
+
+STBIDEF int stbi_info_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp) {
+	stbi__context s;
+	stbi__start_mem(&s, buffer, len);
+	return stbi__info_main(&s, x, y, comp);
+}
+
+STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const* c, void* user, int* x, int* y, int* comp) {
+	stbi__context s;
+	stbi__start_callbacks(&s, (stbi_io_callbacks*)c, user);
+	return stbi__info_main(&s, x, y, comp);
+}
+
+STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const* buffer, int len) {
+	stbi__context s;
+	stbi__start_mem(&s, buffer, len);
+	return stbi__is_16_main(&s);
+}
+
+STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const* c, void* user) {
+	stbi__context s;
+	stbi__start_callbacks(&s, (stbi_io_callbacks*)c, user);
+	return stbi__is_16_main(&s);
+}
+
+#endif // STB_IMAGE_IMPLEMENTATION
+
+/*
+   revision history:
+	  2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and
+   platform ifdefs 2.19  (2018-02-11) fix warning 2.18  (2018-01-30) fix
+   warnings 2.17  (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug
+						 1-bit BMP
+						 *_is_16_bit api
+						 avoid warnings
+	  2.16  (2017-07-23) all functions have 16-bit variants;
+						 STBI_NO_STDIO works again;
+						 compilation fixes;
+						 fix rounding in unpremultiply;
+						 optimize vertical flip;
+						 disable raw_len validation;
+						 documentation fixes
+	  2.15  (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode;
+						 warning fixes; disable run-time SSE detection on gcc;
+						 uniform handling of optional "return" values;
+						 thread-safe initialization of zlib tables
+	  2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet
+   JPGs 2.13  (2016-11-29) add 16-bit API, only supported for PNG right now 2.12
+   (2016-04-02) fix typo in 2.11 PSD fix that caused crashes 2.11  (2016-04-02)
+   allocate large structures on the stack remove white matting for transparent
+   PSD fix reported channel count for PNG & BMP re-enable SSE2 in non-gcc 64-bit
+						 support RGB-formatted JPEG
+						 read 16-bit PNGs (only as 8-bit)
+	  2.10  (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED
+	  2.09  (2016-01-16) allow comments in PNM files
+						 16-bit-per-pixel TGA (not bit-per-component)
+						 info() for TGA could break due to .hdr handling
+						 info() for BMP to shares code instead of sloppy parse
+						 can use STBI_REALLOC_SIZED if allocator doesn't support
+   realloc code cleanup 2.08  (2015-09-13) fix to 2.07 cleanup, reading RGB PSD
+   as RGBA 2.07  (2015-09-13) fix compiler warnings partial animated GIF support
+						 limited 16-bpc PSD support
+						 #ifdef unused functions
+						 bug with < 92 byte PIC,PNM,HDR,TGA
+	  2.06  (2015-04-19) fix bug where PSD returns wrong '*comp' value
+	  2.05  (2015-04-19) fix bug in progressive JPEG handling, fix warning
+	  2.04  (2015-04-15) try to re-enable SIMD on MinGW 64-bit
+	  2.03  (2015-04-12) extra corruption checking (mmozeiko)
+						 stbi_set_flip_vertically_on_load (nguillemot)
+						 fix NEON support; fix mingw support
+	  2.02  (2015-01-19) fix incorrect assert, fix warning
+	  2.01  (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit
+   without -msse2 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG 2.00
+   (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) progressive
+   JPEG (stb) PGM/PPM support (Ken Miller) STBI_MALLOC,STBI_REALLOC,STBI_FREE
+						 GIF bugfix -- seemingly never worked
+						 STBI_NO_*, STBI_ONLY_*
+	  1.48  (2014-12-14) fix incorrectly-named assert()
+	  1.47  (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar
+   Cornut & stb) optimize PNG (ryg) fix bug in interlaced PNG with
+   user-specified channel count (stb) 1.46  (2014-08-26) fix broken tRNS chunk
+   (colorkey-style transparency) in non-paletted PNG 1.45  (2014-08-16) fix
+   MSVC-ARM internal compiler error by wrapping malloc 1.44  (2014-08-07)
+			  various warning fixes from Ronny Chevalier
+	  1.43  (2014-07-15)
+			  fix MSVC-only compiler problem in code changed in 1.42
+	  1.42  (2014-07-09)
+			  don't define _CRT_SECURE_NO_WARNINGS (affects user code)
+			  fixes to stbi__cleanup_jpeg path
+			  added STBI_ASSERT to avoid requiring assert.h
+	  1.41  (2014-06-25)
+			  fix search&replace from 1.36 that messed up comments/error
+   messages 1.40  (2014-06-22) fix gcc struct-initialization warning 1.39
+   (2014-06-15) fix to TGA optimization when req_comp != number of components in
+   TGA; fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my
+   test suite) add support for BMP version 5 (more ignored fields) 1.38
+   (2014-06-06) suppress MSVC warnings on integer casts truncating values fix
+   accidental rename of 'skip' field of I/O 1.37  (2014-06-04) remove duplicate
+   typedef 1.36  (2014-06-03) convert to header file single-file library if
+   de-iphone isn't set, load iphone images color-swapped instead of returning
+   NULL 1.35  (2014-05-27) various warnings fix broken STBI_SIMD path fix bug
+   where stbi_load_from_file no longer left file pointer in correct place fix
+   broken non-easy path for 32-bit BMP (possibly never used) TGA optimization by
+   Arseny Kapoulkine 1.34  (unknown) use STBI_NOTUSED in
+   stbi__resample_row_generic(), fix one more leak in tga failure case 1.33
+   (2011-07-14) make stbi_is_hdr work in STBI_NO_HDR (as specified), minor
+   compiler-friendly improvements 1.32  (2011-07-13) support for "info" function
+   for all supported filetypes (SpartanJ) 1.31  (2011-06-20) a few more leak
+   fixes, bug in PNG handling (SpartanJ) 1.30  (2011-06-11) added ability to
+   load files via callbacks to accomidate custom input streams (Ben Wenger)
+			  removed deprecated format-specific test/load functions
+			  removed support for installable file formats (stbi_loader) --
+   would have been broken for IO callbacks anyway error cases in bmp and tga
+   give messages and don't leak (Raymond Barbiero, grisha) fix inefficiency in
+   decoding 32-bit BMP (David Woo) 1.29  (2010-08-16) various warning fixes from
+   Aurelien Pocheville 1.28  (2010-08-01) fix bug in GIF palette transparency
+   (SpartanJ) 1.27  (2010-08-01) cast-to-stbi_uc to fix warnings 1.26
+   (2010-07-24) fix bug in file buffering for PNG reported by SpartanJ 1.25
+   (2010-07-17) refix trans_data warning (Won Chun) 1.24  (2010-07-12) perf
+   improvements reading from files on platforms with lock-heavy fgetc() minor
+   perf improvements for jpeg deprecated type-specific functions so we'll get
+   feedback if they're needed attempt to fix trans_data warning (Won Chun) 1.23
+   fixed bug in iPhone support 1.22  (2010-07-10) removed image *writing*
+   support stbi_info support from Jetro Lauha GIF support from Jean-Marc Lienher
+			  iPhone PNG-extensions from James Brown
+			  warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err.
+   Janez (U+017D)emva) 1.21    fix use of 'stbi_uc' in header (reported by jon
+   blow) 1.20    added support for Softimage PIC, by Tom Seddon 1.19    bug in
+   interlaced PNG corruption check (found by ryg) 1.18  (2008-08-02) fix a
+   threading bug (local mutable static) 1.17    support interlaced PNG 1.16
+   major bugfix - stbi__convert_format converted one too many pixels 1.15
+   initialize some fields for thread safety 1.14    fix threadsafe conversion
+   bug header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
+	  1.13    threadsafe
+	  1.12    const qualifiers in the API
+	  1.11    Support installable IDCT, colorspace conversion routines
+	  1.10    Fixes for 64-bit (don't use "unsigned long")
+			  optimized upsampling by Fabian "ryg" Giesen
+	  1.09    Fix format-conversion for PSD code (bad global variables!)
+	  1.08    Thatcher Ulrich's PSD code integrated by Nicolas Schulz
+	  1.07    attempt to fix C++ warning/errors again
+	  1.06    attempt to fix C++ warning/errors again
+	  1.05    fix TGA loading to return correct *comp and use good luminance
+   calc 1.04    default float alpha is 1, not 255; use 'void *' for
+   stbi_image_free 1.03    bugfixes to STBI_NO_STDIO, STBI_NO_HDR 1.02 support
+   for (subset of) HDR files, float interface for preferred access to them 1.01
+   fix bug: possible bug in handling right-side up bmps... not sure fix bug: the
+   stbi__bmp_load() and stbi__tga_load() functions didn't work at all 1.00
+   interface to zlib that skips zlib header 0.99    correct handling of alpha in
+   palette 0.98    TGA loader by lonesock; dynamically add loaders (untested)
+	  0.97    jpeg errors on too large a file; also catch another malloc failure
+	  0.96    fix detection of invalid v value - particleman@mollyrocket forum
+	  0.95    during header scan, seek to markers in case of padding
+	  0.94    STBI_NO_STDIO to disable stdio usage; rename all #defines the same
+	  0.93    handle jpegtran output; verbose errors
+	  0.92    read 4,8,16,24,32-bit BMP files of several formats
+	  0.91    output 24-bit Windows 3.0 BMP files
+	  0.90    fix a few more warnings; bump version number to approach 1.0
+	  0.61    bugfixes due to Marc LeBlanc, Christopher Lloyd
+	  0.60    fix compiling as c++
+	  0.59    fix warnings: merge Dave Moore's -Wall fixes
+	  0.58    fix bug: zlib uncompressed mode len/nlen was wrong endian
+	  0.57    fix bug: jpg last huffman symbol before marker was >9 bits but
+   less than 16 available 0.56    fix bug: zlib uncompressed mode len vs. nlen
+	  0.55    fix bug: restart_interval not initialized to 0
+	  0.54    allow NULL for 'int *comp'
+	  0.53    fix bug in png 3->4; speedup png decoding
+	  0.52    png handles req_comp=3,4 directly; minor cleanup; jpeg comments
+	  0.51    obey req_comp requests, 1-component jpegs return as 1-component,
+			  on 'test' only check type, not whether we support this variant
+	  0.50  (2006-11-19)
+			  first released version
+*/
+
+/*
+------------------------------------------------------------------------------
+This software is available under 2 licenses -- choose whichever you prefer.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2017 Sean Barrett
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+software, either in source code form or as a compiled binary, for any purpose,
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this
+software dedicate any and all copyright interest in the software to the public
+domain. We make this dedication for the benefit of the public at large and to
+the detriment of our heirs and successors. We intend this dedication to be an
+overt act of relinquishment in perpetuity of all present and future rights to
+this software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------
+*/
--- /dev/null
+++ b/src/SDL_Examples/include/stretchy_buffer.h
@@ -1,0 +1,263 @@
+// stretchy_buffer.h - v1.04 - public domain - nothings.org/stb
+// a vector<>-like dynamic array for C
+//
+// version history:
+//      1.04 -  fix warning
+//      1.03 -  compile as C++ maybe
+//      1.02 -  tweaks to syntax for no good reason
+//      1.01 -  added a "common uses" documentation section
+//      1.0  -  fixed bug in the version I posted prematurely
+//      0.9  -  rewrite to try to avoid strict-aliasing optimization
+//              issues, but won't compile as C++
+//
+// Will probably not work correctly with strict-aliasing optimizations.
+//
+// The idea:
+//
+//    This implements an approximation to C++ vector<> for C, in that it
+//    provides a generic definition for dynamic arrays which you can
+//    still access in a typesafe way using arr[i] or *(arr+i). However,
+//    it is simply a convenience wrapper around the common idiom of
+//    of keeping a set of variables (in a struct or globals) which store
+//        - pointer to array
+//        - the length of the "in-use" part of the array
+//        - the current size of the allocated array
+//
+//    I find it to be the single most useful non-built-in-structure when
+//    programming in C (hash tables a close second), but to be clear
+//    it lacks many of the capabilities of C++ vector<>: there is no
+//    range checking, the object address isn't stable (see next section
+//    for details), the set of methods available is small (although
+//    the file stb.h has another implementation of stretchy buffers
+//    called 'stb_arr' which provides more methods, e.g. for insertion
+//    and deletion).
+//
+// How to use:
+//
+//    Unlike other stb header file libraries, there is no need to
+//    define an _IMPLEMENTATION symbol. Every #include creates as
+//    much implementation is needed.
+//
+//    stretchy_buffer.h does not define any types, so you do not
+//    need to #include it to before defining data types that are
+//    stretchy buffers, only in files that *manipulate* stretchy
+//    buffers.
+//
+//    If you want a stretchy buffer aka dynamic array containing
+//    objects of TYPE, declare such an array as:
+//
+//       TYPE *myarray = NULL;
+//
+//    (There is no typesafe way to distinguish between stretchy
+//    buffers and regular arrays/pointers; this is necessary to
+//    make ordinary array indexing work on these objects.)
+//
+//    Unlike C++ vector<>, the stretchy_buffer has the same
+//    semantics as an object that you manually malloc and realloc.
+//    The pointer may relocate every time you add a new object
+//    to it, so you:
+//
+//         1. can't take long-term pointers to elements of the array
+//         2. have to return the pointer from functions which might expand it
+//            (either as a return value or by storing it to a ptr-to-ptr)
+//
+//    Now you can do the following things with this array:
+//
+//         sb_free(TYPE *a)           free the array
+//         sb_count(TYPE *a)          the number of elements in the array
+//         sb_push(TYPE *a, TYPE v)   adds v on the end of the array, a la push_back
+//         sb_add(TYPE *a, int n)     adds n uninitialized elements at end of array & returns pointer to first added
+//         sb_last(TYPE *a)           returns an lvalue of the last item in the array
+//         a[n]                       access the nth (counting from 0) element of the array
+//
+//     #define STRETCHY_BUFFER_NO_SHORT_NAMES to only export
+//     names of the form 'stb_sb_' if you have a name that would
+//     otherwise collide.
+//
+//     Note that these are all macros and many of them evaluate
+//     their arguments more than once, so the arguments should
+//     be side-effect-free.
+//
+//     Note that 'TYPE *a' in sb_push and sb_add must be lvalues
+//     so that the library can overwrite the existing pointer if
+//     the object has to be reallocated.
+//
+//     In an out-of-memory condition, the code will try to
+//     set up a null-pointer or otherwise-invalid-pointer
+//     exception to happen later. It's possible optimizing
+//     compilers could detect this write-to-null statically
+//     and optimize away some of the code, but it should only
+//     be along the failure path. Nevertheless, for more security
+//     in the face of such compilers, #define STRETCHY_BUFFER_OUT_OF_MEMORY
+//     to a statement such as assert(0) or exit(1) or something
+//     to force a failure when out-of-memory occurs.
+//
+// Common use:
+//
+//    The main application for this is when building a list of
+//    things with an unknown quantity, either due to loading from
+//    a file or through a process which produces an unpredictable
+//    number.
+//
+//    My most common idiom is something like:
+//
+//       SomeStruct *arr = NULL;
+//       while (something)
+//       {
+//          SomeStruct new_one;
+//          new_one.whatever = whatever;
+//          new_one.whatup   = whatup;
+//          new_one.foobar   = barfoo;
+//          sb_push(arr, new_one);
+//       }
+//
+//    and various closely-related factorings of that. For example,
+//    you might have several functions to create/init new SomeStructs,
+//    and if you use the above idiom, you might prefer to make them
+//    return structs rather than take non-const-pointers-to-structs,
+//    so you can do things like:
+//
+//       SomeStruct *arr = NULL;
+//       while (something)
+//       {
+//          if (case_A) {
+//             sb_push(arr, some_func1());
+//          } else if (case_B) {
+//             sb_push(arr, some_func2());
+//          } else {
+//             sb_push(arr, some_func3());
+//          }
+//       }
+//
+//    Note that the above relies on the fact that sb_push doesn't
+//    evaluate its second argument more than once. The macros do
+//    evaluate the *array* argument multiple times, and numeric
+//    arguments may be evaluated multiple times, but you can rely
+//    on the second argument of sb_push being evaluated only once.
+//
+//    Of course, you don't have to store bare objects in the array;
+//    if you need the objects to have stable pointers, store an array
+//    of pointers instead:
+//
+//       SomeStruct **arr = NULL;
+//       while (something)
+//       {
+//          SomeStruct *new_one = malloc(sizeof(*new_one));
+//          new_one->whatever = whatever;
+//          new_one->whatup   = whatup;
+//          new_one->foobar   = barfoo;
+//          sb_push(arr, new_one);
+//       }
+//
+// How it works:
+//
+//    A long-standing tradition in things like malloc implementations
+//    is to store extra data before the beginning of the block returned
+//    to the user. The stretchy buffer implementation here uses the
+//    same trick; the current-count and current-allocation-size are
+//    stored before the beginning of the array returned to the user.
+//    (This means you can't directly free() the pointer, because the
+//    allocated pointer is different from the type-safe pointer provided
+//    to the user.)
+//
+//    The details are trivial and implementation is straightforward;
+//    the main trick is in realizing in the first place that it's
+//    possible to do this in a generic, type-safe way in C.
+//
+// Contributors:
+//
+// Timothy Wright (github:ZenToad)
+//
+// LICENSE
+//
+//   See end of file for license information.
+
+#ifndef STB_STRETCHY_BUFFER_H_INCLUDED
+#define STB_STRETCHY_BUFFER_H_INCLUDED
+
+#ifndef NO_STRETCHY_BUFFER_SHORT_NAMES
+#define sb_free   stb_sb_free
+#define sb_push   stb_sb_push
+#define sb_count  stb_sb_count
+#define sb_add    stb_sb_add
+#define sb_last   stb_sb_last
+#endif
+
+#define stb_sb_free(a)         ((a) ? free(stb__sbraw(a)),0 : 0)
+#define stb_sb_push(a,v)       (stb__sbmaybegrow(a,1), (a)[stb__sbn(a)++] = (v))
+#define stb_sb_count(a)        ((a) ? stb__sbn(a) : 0)
+#define stb_sb_add(a,n)        (stb__sbmaybegrow(a,n), stb__sbn(a)+=(n), &(a)[stb__sbn(a)-(n)])
+#define stb_sb_last(a)         ((a)[stb__sbn(a)-1])
+
+#define stb__sbraw(a) ((int *) (void *) (a) - 2)
+#define stb__sbm(a)   stb__sbraw(a)[0]
+#define stb__sbn(a)   stb__sbraw(a)[1]
+
+#define stb__sbneedgrow(a,n)  ((a)==0 || stb__sbn(a)+(n) >= stb__sbm(a))
+#define stb__sbmaybegrow(a,n) (stb__sbneedgrow(a,(n)) ? stb__sbgrow(a,n) : 0)
+#define stb__sbgrow(a,n)      (*((void **)&(a)) = stb__sbgrowf((a), (n), sizeof(*(a))))
+
+#include <stdlib.h>
+
+static void * stb__sbgrowf(void *arr, int increment, int itemsize)
+{
+   int dbl_cur = arr ? 2*stb__sbm(arr) : 0;
+   int min_needed = stb_sb_count(arr) + increment;
+   int m = dbl_cur > min_needed ? dbl_cur : min_needed;
+   int *p = (int *) realloc(arr ? stb__sbraw(arr) : 0, itemsize * m + sizeof(int)*2);
+   if (p) {
+      if (!arr)
+         p[1] = 0;
+      p[0] = m;
+      return p+2;
+   } else {
+      #ifdef STRETCHY_BUFFER_OUT_OF_MEMORY
+      STRETCHY_BUFFER_OUT_OF_MEMORY ;
+      #endif
+      return (void *) (2*sizeof(int)); // try to force a NULL pointer exception later
+   }
+}
+#endif // STB_STRETCHY_BUFFER_H_INCLUDED
+
+
+/*
+------------------------------------------------------------------------------
+This software is available under 2 licenses -- choose whichever you prefer.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2017 Sean Barrett
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+software, either in source code form or as a compiled binary, for any purpose,
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this
+software dedicate any and all copyright interest in the software to the public
+domain. We make this dedication for the benefit of the public at large and to
+the detriment of our heirs and successors. We intend this dedication to be an
+overt act of relinquishment in perpetuity of all present and future rights to
+this software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------
+*/
--- /dev/null
+++ b/src/SDL_Examples/include/tobjparse.h
@@ -1,0 +1,338 @@
+#ifndef TOBJ_PARSE_H
+#define TOBJ_PARSE_H
+#include "3dMath.h"
+#include "stretchy_buffer.h"
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+typedef struct{
+	long long unsigned int p;	
+	long long unsigned int n;	
+	long long unsigned int tc;
+	long long unsigned int vc;
+}facedef;
+typedef struct{
+	vec3* positions;
+	vec3* normals;
+	vec3* texcoords;
+	vec3* colors;
+	facedef* faces;
+}objraw;
+typedef struct{
+	int npoints; //Number of points.
+	vec3* d; //Triangles (Same winding as in the file)
+	vec3* n; //Normals
+	vec3* t; //Texture Cordinates
+	vec3* c; //colors
+}model;
+objraw initobjraw(){
+	return (objraw){
+		.positions=NULL,
+		.normals=NULL,
+		.texcoords=NULL,
+		.faces=NULL
+	};
+}
+model initmodel(){
+	return (model){
+		.npoints=0,
+		.d=NULL,
+		.n=NULL,
+		.t=NULL,
+		.c=NULL
+	};
+}
+void freeobjraw(objraw* o){
+	sb_free(o->positions);
+	sb_free(o->texcoords);
+	sb_free(o->normals);
+	sb_free(o->colors);
+	sb_free(o->faces);
+}
+void freemodel(model* o){
+	free(o->d);
+	free(o->t);
+	free(o->n);
+	free(o->c);
+}
+model tobj_tomodel(objraw* raw){
+	if(!raw || raw->faces == NULL)
+	{
+		puts("\nAttempted to convert empty model... Aborting...\n");
+		return initmodel();
+	}
+	model ret = initmodel();
+	ret.npoints = 0;
+	ret.d=malloc(sizeof(vec3) * sb_count(raw->faces));
+	if(raw->normals)ret.n=malloc(sizeof(vec3) * sb_count(raw->faces));
+	if(raw->texcoords)ret.t=malloc(sizeof(vec3) * sb_count(raw->faces));
+	if(raw->colors)ret.c=malloc(sizeof(vec3) * sb_count(raw->faces));
+	long long unsigned int piter = 0;
+	long long unsigned int niter = 0;
+	long long unsigned int titer = 0;
+	long long unsigned int citer = 0;
+	//printf("\nsb_count of faces is %d",sb_count(raw->faces));
+	for(long long int i = 0; i < sb_count(raw->faces);i++){
+		//printf("\n::%lld:: 0\n",i);
+		long long unsigned int p = raw->faces[i].p-1;
+		long long unsigned int n = raw->faces[i].n-1;
+		long long unsigned int t = raw->faces[i].tc-1;
+		long long unsigned int c = raw->faces[i].vc-1;
+		
+		if(p < (long long unsigned int)sb_count(raw->positions)){
+			//sb_push(ret.d, raw->positions[p]);
+			ret.d[piter++] = raw->positions[p];
+			ret.npoints++;
+		} else {
+			printf("\nBad Data!!!\n");
+			printf("p=%llu n=%llu t=%llu c=%llu i=%lld\n\n",p,n,t,c,i);
+		}
+		if(raw->normals){
+			if(n < (long long unsigned int)sb_count(raw->normals)){
+				//sb_push(ret.n, raw->normals[n]);
+				ret.n[niter++] = raw->normals[n];
+			} else {
+				puts("\n<BAD DATA>, NORMALS\n");
+			}
+		}
+		if(raw->texcoords){
+			if(t < (long long unsigned int)sb_count(raw->texcoords)){
+				//sb_push(ret.t, raw->texcoords[t]);
+				ret.t[titer++] = raw->texcoords[t];
+			} else
+				puts("\n<BAD DATA>, TEXCOORDS\n");
+		}
+		if(raw->colors){
+			if(c < (long long unsigned int)sb_count(raw->colors)){
+				//sb_push(ret.c, raw->colors[c]);
+				ret.c[citer++] = raw->colors[c];
+			} else {
+				puts("\n<BAD DATA>, COLORS\n");
+			}
+		}
+	}
+	//printf("\ntobj_tomodel completed.\n");
+	if(ret.npoints != piter){
+		printf("\nBAD DATA!!! ABORTING...\n");
+		exit(1);
+	}
+	return ret;
+}
+//Only loads 
+objraw tobj_load(const char* fn){
+	FILE* f;
+	f = fopen(fn, "r");
+	objraw retval = initobjraw();
+	if(f){
+		char line[2048];line[2047]=0;
+		//int read = 0;
+
+
+		while(fgets(line, 2047, f)){
+			vec3 val;
+			facedef frick0;
+			facedef frick1;
+			facedef frick2;
+			if(line[0] == 'v' && line[1] == ' ' && (strlen(line) > 4)){
+				//read = sscanf(line,"v %f %f %f",&val.d[0],&val.d[1],&val.d[2]);
+				//printf("\nv Read: %d",read);
+				sb_push(retval.positions, val);
+				char* t = line+2;
+				sb_last(retval.positions).d[0] = atof(t);
+				while(!isspace(*t) && *t != '\0')t++;
+				if(*t == '\0')continue;
+				t++;
+				sb_last(retval.positions).d[1] = atof(t);
+				while(!isspace(*t) && *t != '\0')t++;
+				if(*t == '\0')continue;
+				t++;
+				sb_last(retval.positions).d[2] = atof(t);
+			}
+			if(line[0] == 'v' && line[1] == 't' && (strlen(line) > 4)){
+				//read = sscanf(line,"vt %f %f",&val.d[0],&val.d[1]);
+				sb_push(retval.texcoords, val);
+				char* t = line+3;
+				sb_last(retval.texcoords).d[0] = atof(t);
+				while(!isspace(*t) && *t != '\0')t++;
+				if(*t == '\0')continue;
+				t++;
+				sb_last(retval.texcoords).d[1] = -atof(t);
+				
+			}
+			if(line[0] == 'v' && line[1] == 'c' && (strlen(line) > 4)){
+				//read=sscanf(line,"vc %f %f %f",&val.d[0],&val.d[1],&val.d[2]);
+				sb_push(retval.colors, val);
+				char* t = line+3;
+				sb_last(retval.colors).d[0] = atof(t);
+				while(!isspace(*t) && *t != '\0')t++;
+				if(*t == '\0')continue;
+				t++;
+				sb_last(retval.colors).d[1] = atof(t);
+				while(!isspace(*t) && *t != '\0')t++;
+				if(*t == '\0')continue;
+				t++;
+				sb_last(retval.colors).d[2] = atof(t);
+				//printf("\nvc Read: %d",read);
+				
+			}
+			if(line[0] == 'v' && line[1] =='n' && (strlen(line) > 4)){
+				//read=sscanf(line,"vn %f %f %f",&val.d[0],&val.d[1],&val.d[2]);
+				//printf("\nn Read: %d",read);
+				sb_push(retval.normals, val);
+				char* t = line+3;
+				sb_last(retval.normals).d[0] = atof(t);
+				while(!isspace(*t) && *t != '\0')t++;
+				if(*t == '\0')continue;
+				t++;
+				sb_last(retval.normals).d[1] = atof(t);
+				while(!isspace(*t) && *t != '\0')t++;
+				if(*t == '\0')continue;
+				t++;
+				sb_last(retval.normals).d[2] = atof(t);
+				
+				/*
+				printf("\nreading from stretchy buffer, %f %f %f",
+					retval.normals[sb_count(retval.normals)-1].d[0],
+					retval.normals[sb_count(retval.normals)-1].d[1],
+					retval.normals[sb_count(retval.normals)-1].d[2]
+				);
+				*/
+			}
+			if(line[0] == 'f' && (strlen(line) > 4)){
+				//The face lines are hard to parse.
+				//They could be p p p
+				// or p/vt p/vt p/vt
+				//or p//n p//n p//n
+				//or p/vt/n p/vt/n p/vt/n
+				//or p/vt/n/c p/vt/n/c p/vt/n/c
+				//or some other combination, as long as it has p it's valid
+				//Grab the position indices
+				{
+					char* t = line+2;
+					frick0.p = strtoull(t,NULL,10);
+					//printf("\nf[0].p is %llu",frick0.p);
+					while(!isspace(*t) && *t != '\0')t++;
+					if(*t == '\0')continue;
+					t++;
+					frick1.p = strtoull(t,NULL,10);
+					//printf("\nf[1].p is %llu",frick1.p);
+					while(!isspace(*t) && *t != '\0')t++;
+					if(*t == '\0')continue;
+					t++;
+					frick2.p = strtoull(t,NULL,10);
+					//printf("\nf[2].p is %llu",frick2.p);
+				}
+				//Grab the texture coordinates (First character after first slash!)
+				if(retval.texcoords){
+					char* t = line+2;
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
+					t++;//next character
+					frick0.tc = strtoull(t,NULL,10);
+					//printf("\nf[0].tc is %llu",frick0.tc);
+					//Jump to the next group of numbers
+					while(!isspace(*t) && *t != '\0')t++;
+					if(*t == '\0')continue;
+					t++;
+					//first slash
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to next slash
+					t++;//next character
+					frick1.tc = strtoull(t,NULL,10);
+					//printf("\nf[1].tc is %llu",frick1.tc);
+					//Jump to the next group of numbers
+					while(!isspace(*t) && *t != '\0')t++;
+					if(*t == '\0')continue;
+					t++;
+					//first slash
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to next slash
+					t++;//next character
+					frick2.tc = strtoull(t,NULL,10);
+					//printf("\nf[2].tc is %llu",frick2.tc);
+				}
+				if(retval.normals){
+					char* t = line+2;
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
+					t++;//next character
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
+					t++;//next character
+					frick0.n = strtoull(t,NULL,10);
+					//Jump to the next group of numbers
+					while(!isspace(*t) && *t != '\0')t++;
+					if(*t == '\0')continue;
+					t++;
+					//first slash
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
+					t++;//next character
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
+					t++;//next character
+					frick1.n = strtoull(t,NULL,10);
+
+					//Jump to the next group of numbers
+					while(!isspace(*t) && *t != '\0')t++;
+					if(*t == '\0')continue;
+					t++;
+					//first slash
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
+					t++;//next character
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
+					t++;//next character
+					frick2.n = strtoull(t,NULL,10);
+				}
+				if(retval.colors){
+					char* t = line+2;
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
+					t++;//next character
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
+					t++;//next character
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to third slash
+					t++;//next character
+					frick0.vc = strtoull(t,NULL,10);
+					//printf("\nf[0].vc is %llu",frick0.vc);
+					//Jump to the next group of numbers
+					while(!isspace(*t) && *t != '\0')t++;
+					if(*t == '\0')continue;
+					t++;
+					//first slash
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
+					t++;//next character
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
+					t++;//next character
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to third slash
+					t++;//next character
+					frick1.vc = strtoull(t,NULL,10);
+					//printf("\nf[1].vc is %llu",frick1.vc);
+					//Jump to the next group of numbers
+					while(!isspace(*t) && *t != '\0')t++;
+					if(*t == '\0')continue;
+					t++;
+					//first slash
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
+					t++;//next character
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
+					t++;//next character
+					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to third slash
+					t++;//next character
+					frick2.vc = strtoull(t,NULL,10);
+					//printf("\nf[2].vc is %llu",frick2.vc);
+				}
+				sb_push(retval.faces,frick0);
+				sb_push(retval.faces,frick1);
+				sb_push(retval.faces,frick2);
+				/*
+				printf("\nReading from sb, frick0.p=%llu frick0.n=%llu frick0.tc=%llu frick0.vc=%llu",
+					retval.faces[sb_count(retval.faces)-3].p,
+					retval.faces[sb_count(retval.faces)-3].n,
+					retval.faces[sb_count(retval.faces)-3].tc,
+					retval.faces[sb_count(retval.faces)-3].vc
+				);*/
+			}
+		}
+	fclose(f);
+	} else {
+		printf("\nUnable to load file %s\n",fn);
+	}
+	
+	return retval;
+}
+
+#endif
\ No newline at end of file
--- a/src/SDL_Examples/model.c
+++ b/src/SDL_Examples/model.c
@@ -12,10 +12,10 @@
 
 #include "../include/GL/gl.h"
 #define STB_IMAGE_IMPLEMENTATION
-#include "../include/stb_image.h"
+#include "include/stb_image.h"
 #define CHAD_MATH_IMPL
-#include "../include/3dMath.h"
-#include "../include/tobjparse.h"
+#include "include/3dMath.h"
+#include "include/tobjparse.h"
 #define CHAD_API_IMPL
 #include "include/api_audio.h"
 #include <SDL/SDL.h>
--- a/src/SDL_Examples/texture.c
+++ b/src/SDL_Examples/texture.c
@@ -14,7 +14,7 @@
 #define CHAD_API_IMPL
 #include "include/api_audio.h"
 #define STB_IMAGE_IMPLEMENTATION
-#include "../include/stb_image.h"
+#include "include/stb_image.h"
 #include <SDL/SDL.h>
 #include "../zbuffer.h"
 
--- a/src/include/3dMath.h
+++ /dev/null
@@ -1,603 +1,0 @@
-#ifndef CHAD_MATH_H
-#define CHAD_MATH_H
-#include <math.h>
-#include <string.h>
-typedef float f_;
-typedef unsigned int uint;
-#define MAX(x,y) (x>y?x:y)
-#define MIN(x,y) (x<y?x:y)
-typedef struct {f_ d[3];} vec3;
-typedef struct {int d[3];} ivec3;
-typedef struct {f_ d[4];} vec4;
-typedef struct {f_ d[16];} mat4;
-mat4 swapRowColumnMajor(mat4 in);
-mat4 lookAt(vec3 eye, vec3 at, vec3 tmp);
-vec4 getrow(mat4 a, uint index);
-vec4 getcol(mat4 a, uint index);
-mat4 identitymat4();
-mat4 scalemat4(vec4 s);
-int invmat4(const mat4 m, mat4* invOut);
-mat4 perspective(f_ fov, f_ aspect, f_ near, f_ far);
-vec3 viewport(uint xdim, uint ydim, vec3 input);
-mat4 rotate(vec3 rotation);
-vec3 rotatev3(vec3 in,vec3 axis, f_ ang);
-mat4 translate(vec3 t);
-f_ clampf(f_ a, f_ min, f_ max);
-f_ lengthv3(vec3 a);
-f_ lengthv4(vec4 a);
-vec3 multvec3(vec3 a, vec3 b);
-vec4 multvec4(vec4 a, vec4 b);
-
-vec3 clampvec3(vec3 a, vec3 min, vec3 max);
-vec4 clampvec4(vec4 a, vec4 min, vec4 max);
-f_ dotv3(vec3 a, vec3 b);
-f_ dotv4(vec4 a, vec4 b);
-mat4 multm4(mat4 a, mat4 b);
-vec4 mat4xvec4(mat4 t, vec4 v);
-vec3 crossv3(vec3 a, vec3 b);
-vec3 scalev3(f_ s, vec3 i);
-
-vec4 scalev4(f_ s, vec4 i);
-vec3 normalizev3(vec3 a);
-vec4 normalizev4(vec4 a);
-vec3 addv3(vec3 a, vec3 b);
-vec4 addv4(vec4 a, vec4 b);
-vec3 subv3(vec3 a, vec3 b);
-vec4 subv4(vec4 a, vec4 b);
-vec3 reflect(vec3 in, vec3 norm);
-vec4 upv3(vec3 in, f_ w);
-vec3 downv4(vec4 in);
-
-//Collision detection
-//These Algorithms return the penetration vector into
-//the shape in the first argument
-//With depth of penetration in element 4
-//if depth of penetration is zero or lower then there is no penetration.
-typedef struct{
-	vec4 c;
-	vec3 e;
-}aabb;
-typedef aabb colshape; //c.d[3] determines if it's a sphere or box. 0 or less = box, greater than 0 = sphere
-vec4 spherevsphere(vec4 s1, vec4 s2);
-vec4 boxvbox(aabb b1, aabb b2);
-vec3 closestpointAABB(aabb b, vec3 p);
-vec4 spherevaabb(vec4 sph,aabb box);
-
-
-#ifdef CHAD_MATH_IMPL
-mat4 swapRowColumnMajor(mat4 in){
-	mat4 result;
-	vec4 t;
-	int i = 0;
-	t = getrow(in,i);
-	memcpy(result.d+i*4, t.d, 4*4);i++;
-	t = getrow(in,i);
-	memcpy(result.d+i*4, t.d, 4*4);i++;
-	t = getrow(in,i);
-	memcpy(result.d+i*4, t.d, 4*4);i++;
-	t = getrow(in,i);
-	memcpy(result.d+i*4, t.d, 4*4);
-	return result;
-}
-mat4 lookAt(vec3 eye, vec3 at, vec3 tmp){
-	mat4 cw = identitymat4();
-	vec3 zaxis = normalizev3(subv3(at,eye));
-	vec3 xaxis = normalizev3(crossv3(zaxis,tmp));
-	vec3 yaxis = crossv3(xaxis, zaxis);
-	zaxis = scalev3(-1,zaxis);
-	cw.d[0*4+0] = xaxis.d[0];
-	cw.d[1*4+0] = xaxis.d[1];
-	cw.d[2*4+0] = xaxis.d[2];
-	cw.d[3*4+0] = -dotv3(xaxis,eye);
-
-	cw.d[0*4+1] = yaxis.d[0];
-	cw.d[1*4+1] = yaxis.d[1];
-	cw.d[2*4+1] = yaxis.d[2];
-	cw.d[3*4+1] = -dotv3(yaxis,eye);
-
-	cw.d[0*4+2] = zaxis.d[0];
-	cw.d[1*4+2] = zaxis.d[1];
-	cw.d[2*4+2] = zaxis.d[2];
-	cw.d[3*4+2] = -dotv3(zaxis,eye);
-	cw.d[0*4+3] = 0;
-	cw.d[1*4+3] = 0;
-	cw.d[2*4+3] = 0;
-	cw.d[3*4+3] = 1;
-	return cw;
-}
-
-/*
-mat4 lookAt(vec3 eye, vec3 at, vec3 tmp){
-	vec3 forw = normalizev3(subv3(eye,at));
-	
-	vec3 right = crossv3(normalizev3(tmp),forw);
-	vec3 tup = crossv3(forw,right);
-	mat4 cw = identitymat4();
-	cw.d[0*4+0*1] = right.d[0];
-	cw.d[0*4+1*1] = right.d[1];
-	cw.d[0*4+2*1] = right.d[2];
-
-	cw.d[1*4+0*1] = tup.d[0];
-	cw.d[1*4+1*1] = tup.d[1];
-	cw.d[1*4+2*1] = tup.d[2];
-
-	cw.d[2*4+0*1] = forw.d[0];
-	cw.d[2*4+1*1] = forw.d[1];
-	cw.d[2*4+2*1] = forw.d[2];
-	
-	cw.d[3*4+0*1] = eye.d[0];
-	cw.d[3*4+1*1] = eye.d[1];
-	cw.d[3*4+2*1] = eye.d[2];
-	cw.d[3*4+3*1] = 1.0;
-	return cw;
-}
-*/
-vec4 getrow(mat4 a, uint index){
-	return (vec4){
-		.d[0]=a.d[0*4+index],
-		.d[1]=a.d[1*4+index],
-		.d[2]=a.d[2*4+index],
-		.d[3]=a.d[3*4+index]
-	};
-}
-vec3 rotatev3(vec3 in, vec3 axis, f_ ang){
-	vec3 t1 = scalev3(cosf(ang),in);
-	vec3 t2 = scalev3(sinf(ang),crossv3(axis,in));
-	vec3 t3 = scalev3((1-cosf(ang))*dotv3(axis,in),axis);
-	return addv3(t1,addv3(t2,t3));
-}
-vec4 getcol(mat4 a, uint index){
-	return (vec4){
-		.d[0]=a.d[index*4+0],
-		.d[1]=a.d[index*4+1],
-		.d[2]=a.d[index*4+2],
-		.d[3]=a.d[index*4+3]
-	};
-}
-mat4 scalemat4(vec4 s){
-	mat4 ret;
-	for(int i = 1; i < 16; i++)
-		ret.d[i]= 0.0;
-	ret.d[0*4 + 0] = s.d[0]; //x scale
-	ret.d[1*4 + 1] = s.d[1]; //y scale
-	ret.d[2*4 + 2] = s.d[2]; //z scale
-	ret.d[3*4 + 3] = s.d[3]; //w scale
-	return ret;
-}
-mat4 identitymat4(){
-	return scalemat4(
-		(vec4){.d[0]=1.0,.d[1]=1.0,.d[2]=1.0,.d[3]=1.0}
-	);
-}
-int invmat4(const mat4 m, mat4* invOut) //returns 1 if successful
-{
-    mat4 inv;
-    f_ det;
-    int i;
-
-    inv.d[0] = m.d[5]  * m.d[10] * m.d[15] - 
-             m.d[5]  * m.d[11] * m.d[14] - 
-             m.d[9]  * m.d[6]  * m.d[15] + 
-             m.d[9]  * m.d[7]  * m.d[14] +
-             m.d[13] * m.d[6]  * m.d[11] - 
-             m.d[13] * m.d[7]  * m.d[10];
-
-    inv.d[4] = -m.d[4]  * m.d[10] * m.d[15] + 
-              m.d[4]  * m.d[11] * m.d[14] + 
-              m.d[8]  * m.d[6]  * m.d[15] - 
-              m.d[8]  * m.d[7]  * m.d[14] - 
-              m.d[12] * m.d[6]  * m.d[11] + 
-              m.d[12] * m.d[7]  * m.d[10];
-
-    inv.d[8] = m.d[4]  * m.d[9] * m.d[15] - 
-             m.d[4]  * m.d[11] * m.d[13] - 
-             m.d[8]  * m.d[5] * m.d[15] + 
-             m.d[8]  * m.d[7] * m.d[13] + 
-             m.d[12] * m.d[5] * m.d[11] - 
-             m.d[12] * m.d[7] * m.d[9];
-
-    inv.d[12] = -m.d[4]  * m.d[9] * m.d[14] + 
-               m.d[4]  * m.d[10] * m.d[13] +
-               m.d[8]  * m.d[5] * m.d[14] - 
-               m.d[8]  * m.d[6] * m.d[13] - 
-               m.d[12] * m.d[5] * m.d[10] + 
-               m.d[12] * m.d[6] * m.d[9];
-
-    inv.d[1] = -m.d[1]  * m.d[10] * m.d[15] + 
-              m.d[1]  * m.d[11] * m.d[14] + 
-              m.d[9]  * m.d[2] * m.d[15] - 
-              m.d[9]  * m.d[3] * m.d[14] - 
-              m.d[13] * m.d[2] * m.d[11] + 
-              m.d[13] * m.d[3] * m.d[10];
-
-    inv.d[5] = m.d[0]  * m.d[10] * m.d[15] - 
-             m.d[0]  * m.d[11] * m.d[14] - 
-             m.d[8]  * m.d[2] * m.d[15] + 
-             m.d[8]  * m.d[3] * m.d[14] + 
-             m.d[12] * m.d[2] * m.d[11] - 
-             m.d[12] * m.d[3] * m.d[10];
-
-    inv.d[9] = -m.d[0]  * m.d[9] * m.d[15] + 
-              m.d[0]  * m.d[11] * m.d[13] + 
-              m.d[8]  * m.d[1] * m.d[15] - 
-              m.d[8]  * m.d[3] * m.d[13] - 
-              m.d[12] * m.d[1] * m.d[11] + 
-              m.d[12] * m.d[3] * m.d[9];
-
-    inv.d[13] = m.d[0]  * m.d[9] * m.d[14] - 
-              m.d[0]  * m.d[10] * m.d[13] - 
-              m.d[8]  * m.d[1] * m.d[14] + 
-              m.d[8]  * m.d[2] * m.d[13] + 
-              m.d[12] * m.d[1] * m.d[10] - 
-              m.d[12] * m.d[2] * m.d[9];
-
-    inv.d[2] = m.d[1]  * m.d[6] * m.d[15] - 
-             m.d[1]  * m.d[7] * m.d[14] - 
-             m.d[5]  * m.d[2] * m.d[15] + 
-             m.d[5]  * m.d[3] * m.d[14] + 
-             m.d[13] * m.d[2] * m.d[7] - 
-             m.d[13] * m.d[3] * m.d[6];
-
-    inv.d[6] = -m.d[0]  * m.d[6] * m.d[15] + 
-              m.d[0]  * m.d[7] * m.d[14] + 
-              m.d[4]  * m.d[2] * m.d[15] - 
-              m.d[4]  * m.d[3] * m.d[14] - 
-              m.d[12] * m.d[2] * m.d[7] + 
-              m.d[12] * m.d[3] * m.d[6];
-
-    inv.d[10] = m.d[0]  * m.d[5] * m.d[15] - 
-              m.d[0]  * m.d[7] * m.d[13] - 
-              m.d[4]  * m.d[1] * m.d[15] + 
-              m.d[4]  * m.d[3] * m.d[13] + 
-              m.d[12] * m.d[1] * m.d[7] - 
-              m.d[12] * m.d[3] * m.d[5];
-
-    inv.d[14] = -m.d[0]  * m.d[5] * m.d[14] + 
-               m.d[0]  * m.d[6] * m.d[13] + 
-               m.d[4]  * m.d[1] * m.d[14] - 
-               m.d[4]  * m.d[2] * m.d[13] - 
-               m.d[12] * m.d[1] * m.d[6] + 
-               m.d[12] * m.d[2] * m.d[5];
-
-    inv.d[3] = -m.d[1] * m.d[6] * m.d[11] + 
-              m.d[1] * m.d[7] * m.d[10] + 
-              m.d[5] * m.d[2] * m.d[11] - 
-              m.d[5] * m.d[3] * m.d[10] - 
-              m.d[9] * m.d[2] * m.d[7] + 
-              m.d[9] * m.d[3] * m.d[6];
-
-    inv.d[7] = m.d[0] * m.d[6] * m.d[11] - 
-             m.d[0] * m.d[7] * m.d[10] - 
-             m.d[4] * m.d[2] * m.d[11] + 
-             m.d[4] * m.d[3] * m.d[10] + 
-             m.d[8] * m.d[2] * m.d[7] - 
-             m.d[8] * m.d[3] * m.d[6];
-
-    inv.d[11] = -m.d[0] * m.d[5] * m.d[11] + 
-               m.d[0] * m.d[7] * m.d[9] + 
-               m.d[4] * m.d[1] * m.d[11] - 
-               m.d[4] * m.d[3] * m.d[9] - 
-               m.d[8] * m.d[1] * m.d[7] + 
-               m.d[8] * m.d[3] * m.d[5];
-
-    inv.d[15] = m.d[0] * m.d[5] * m.d[10] - 
-              m.d[0] * m.d[6] * m.d[9] - 
-              m.d[4] * m.d[1] * m.d[10] + 
-              m.d[4] * m.d[2] * m.d[9] + 
-              m.d[8] * m.d[1] * m.d[6] - 
-              m.d[8] * m.d[2] * m.d[5];
-
-    det = m.d[0] * inv.d[0] + m.d[1] * inv.d[4] + m.d[2] * inv.d[8] + m.d[3] * inv.d[12];
-    if (det == 0)
-        return 0;
-    det = 1.0 / det;
-    for (i = 0; i < 16; i++)
-        invOut->d[i] = inv.d[i] * det;
-    return 1;
-}
-mat4 perspective(f_ fov, f_ aspect, f_ near, f_ far){
-	mat4 ret;
-	f_ D2R = 3.14159265358979323 / 180.0;
-	f_ yScale = 1.0/tanf(D2R * fov/2);
-	f_ xScale = yScale/aspect;
-	f_ nearmfar = near-far;
-	
-	ret.d[0*4+0] = xScale; 	ret.d[0*4+1]=0; 	ret.d[0*4+2]=0;					ret.d[0*4+3]=0;
-	ret.d[1*4+0]=0; 		ret.d[1*4+1]=yScale;ret.d[1*4+2]=0;					ret.d[1*4+3]=0;
-	ret.d[2*4+0]=0; 		ret.d[2*4+1]=0;		ret.d[2*4+2]=(far+near)/nearmfar;ret.d[2*4+3]=-1;
-	ret.d[3*4+0]=0; 		ret.d[3*4+1]=0;		ret.d[3*4+2]=2*far*near/nearmfar;ret.d[3*4+3]=0;
-	
-	/*
-	ret.d[0*4+0] = xScale; 	ret.d[0*4+1]=0; 	ret.d[0*4+2]=0;						ret.d[0*4+3]=0;
-	ret.d[1*4+0]=0; 		ret.d[1*4+1]=yScale;ret.d[1*4+2]=0;						ret.d[1*4+3]=0;
-	ret.d[2*4+0]=0; 		ret.d[2*4+1]=0;		ret.d[2*4+2]=(far+near)/nearmfar;	ret.d[2*4+3]=2*far*near/nearmfar;
-	ret.d[3*4+0]=0; 		ret.d[3*4+1]=0;		ret.d[3*4+2]=-1;					ret.d[3*4+3]=0;
-	*/
-	return ret;
-}
-vec3 viewport(uint xdim, uint ydim, vec3 input){
-	input.d[0] += 1;
-	input.d[1] += 1;
-	input.d[0] *= (f_)xdim / 2.0;
-	input.d[1] *= (f_)ydim / 2.0;
-	input.d[2] = (input.d[2])/2.0;
-	return input;
-}
-mat4 rotate(vec3 rotation){
-	f_ a = rotation.d[0];
-	f_ b = rotation.d[1];
-	f_ c = rotation.d[2];
-	mat4 rm;
-	rm.d[0*4 + 0] = cosf(a)*cosf(b);
-	rm.d[1*4 + 0] = sinf(a)*cosf(b);
-	rm.d[2*4 + 0] = -sinf(b);
-	rm.d[0*4 + 1] = cosf(a)*sinf(b)*sinf(c)-sinf(a)*cosf(c);
-	rm.d[1*4 + 1] = sinf(a)*sinf(b)*sinf(c)+cosf(a)*cosf(c);
-	rm.d[2*4 + 1] = cosf(b)*sinf(c);
-	rm.d[0*4 + 2] = cosf(a)*sinf(b)*cosf(c)+sinf(a)*sinf(c);
-	rm.d[1*4 + 2] = sinf(a)*sinf(b)*cosf(c)-cosf(a)*sinf(c);
-	rm.d[2*4 + 2] = cosf(b)*cosf(c);
-	//the other parts
-	rm.d[0*4 + 3] = 0;
-	rm.d[1*4 + 3] = 0;
-	rm.d[2*4 + 3] = 0;
-	rm.d[3*4 + 3] = 1; //the bottom right corner of the matrix.
-	rm.d[3*4 + 0] = 0;
-	rm.d[3*4 + 1] = 0;
-	rm.d[3*4 + 2] = 0;
-	return rm;
-}
-mat4 translate(vec3 t){
-	mat4 tm = identitymat4();
-	tm.d[3*4+0] = t.d[0];
-	tm.d[3*4+1] = t.d[1];
-	tm.d[3*4+2] = t.d[2];
-	return tm;
-}
-
-f_ clampf(f_ a, f_ min, f_ max){
-	if(a<min) return min;
-	if(a>max) return max;
-	return a;
-}
-f_ lengthv3(vec3 a){
-	return sqrtf(a.d[0] * a.d[0] + a.d[1] * a.d[1] + a.d[2] * a.d[2]);
-}
-f_ lengthv4(vec4 a){
-	return sqrtf(a.d[0] * a.d[0] + a.d[1] * a.d[1] + a.d[2] * a.d[2] + a.d[3] * a.d[3]);
-}
-vec3 multvec3(vec3 a, vec3 b){
-	return (vec3){
-		.d[0]=a.d[0]*b.d[0],
-		.d[1]=a.d[1]*b.d[1],
-		.d[2]=a.d[2]*b.d[2]
-	};
-}
-vec4 multvec4(vec4 a, vec4 b){
-	return (vec4){
-		.d[0]=a.d[0]*b.d[0],
-		.d[1]=a.d[1]*b.d[1],
-		.d[2]=a.d[2]*b.d[2],
-		.d[3]=a.d[3]*b.d[3]
-	};
-}
-vec3 clampvec3(vec3 a, vec3 min, vec3 max){
-	vec3 ret;
-	ret.d[0] = clampf(a.d[0],min.d[0],max.d[0]);
-	ret.d[1] = clampf(a.d[1],min.d[1],max.d[1]);
-	ret.d[2] = clampf(a.d[2],min.d[2],max.d[2]);
-	return ret;
-}
-vec4 clampvec4(vec4 a, vec4 min, vec4 max){
-	vec4 ret;
-	ret.d[0] = clampf(a.d[0],min.d[0],max.d[0]);
-	ret.d[1] = clampf(a.d[1],min.d[1],max.d[1]);
-	ret.d[2] = clampf(a.d[2],min.d[2],max.d[2]);
-	ret.d[3] = clampf(a.d[3],min.d[3],max.d[3]);
-	return ret;
-}
-f_ dotv3(vec3 a, vec3 b){
-	return a.d[0] * b.d[0] + a.d[1] * b.d[1] + a.d[2] * b.d[2]; 
-}
-f_ dotv4(vec4 a, vec4 b){
-	return a.d[0] * b.d[0] + a.d[1] * b.d[1] + a.d[2] * b.d[2] + a.d[3] * b.d[3]; 
-}
-mat4 multm4(mat4 a, mat4 b){
-	mat4 ret;
-	for(int i = 0; i < 4; i++)
-	for(int j = 0; j < 4; j++)
-		ret.d[i*4 + j] = dotv4(
-			getrow(a, j),
-			getcol(b, i)
-		);
-	return ret;
-}
-vec4 mat4xvec4(mat4 t, vec4 v){
-	uint i = 0;
-	vec4 vr;
-	vr.d[0] = 	t.d[0*4+i] * v.d[0] + 
-				t.d[1*4+i] * v.d[1] +
-				t.d[2*4+i] * v.d[2] +
-				t.d[3*4+i] * v.d[3];
-	i++;
-	vr.d[1] = 	t.d[0*4+i] * v.d[0] +
-				t.d[1*4+i] * v.d[1] + 
-				t.d[2*4+i] * v.d[2] + 
-				t.d[3*4+i] * v.d[3];
-	i++;
-	vr.d[2] = 	t.d[0*4+i] * v.d[0] + 
-				t.d[1*4+i] * v.d[1] + 
-				t.d[2*4+i] * v.d[2] + 
-				t.d[3*4+i] * v.d[3];
-	i++;
-	vr.d[3] = 	t.d[0*4+i] * v.d[0] + 
-				t.d[1*4+i] * v.d[1] + 
-				t.d[2*4+i] * v.d[2] + 
-				t.d[3*4+i] * v.d[3];
-	return vr;
-}
-vec3 crossv3(vec3 a, vec3 b){
-	vec3 retval;
-	retval.d[0] = a.d[1] * b.d[2] - a.d[2] * b.d[1];
-	retval.d[1] = a.d[2] * b.d[0] - a.d[0] * b.d[2];
-	retval.d[2] = a.d[0] * b.d[1] - a.d[1] * b.d[0];
-	return retval;
-}
-vec3 scalev3(f_ s, vec3 i){i.d[0] *= s; i.d[1] *= s; i.d[2] *= s; return i;}
-
-vec4 scalev4(f_ s, vec4 i){i.d[0] *= s; i.d[1] *= s; i.d[2] *= s;i.d[3] *= s; return i;}
-vec3 normalizev3(vec3 a){
-  	if(lengthv3(a)==0) return (vec3){.d[0]=0.0,.d[1]=0.0,.d[2]=1.0};
-	return scalev3(1.0/lengthv3(a), a);
-}
-vec4 normalizev4(vec4 a){
-  	if(lengthv4(a)==0) return (vec4){.d[0]=0.0,.d[1]=0.0,.d[2]=1.0,.d[3]=0.0};
-	return scalev4(1.0/lengthv4(a), a);
-}
-vec3 addv3(vec3 a, vec3 b){
-	a.d[0] += b.d[0]; a.d[1] += b.d[1]; a.d[2] += b.d[2]; return a;
-}
-vec4 addv4(vec4 a, vec4 b){
-	a.d[0] += b.d[0]; a.d[1] += b.d[1]; a.d[2] += b.d[2]; a.d[3] += b.d[3]; return a;
-}
-vec3 subv3(vec3 a, vec3 b){
-	return addv3(a,scalev3(-1,b));
-}
-vec4 subv4(vec4 a, vec4 b){
-	return addv4(a,scalev4(-1,b));
-}
-vec3 reflect(vec3 in, vec3 norm){
-	return 
-	addv3(in, //I +
-		scalev3(-2.0*dotv3(norm, in), //-2.0 * dotv3(norm,in) * 
-			norm //N
-		)
-	);
-}
-vec4 upv3(vec3 in, f_ w){
-	return (vec4){
-		.d[0]=in.d[0],
-		.d[1]=in.d[1],
-		.d[2]=in.d[2],
-		.d[3]=w
-	};
-}
-vec3 downv4(vec4 in){
-	return (vec3){
-		.d[0]=in.d[0],
-		.d[1]=in.d[1],
-		.d[2]=in.d[2]
-	};
-}
-
-//Collision detection
-//These Algorithms return the penetration vector into
-//the shape in the first argument
-//With depth of penetration in element 4
-//if depth of penetration is zero or lower then there is no penetration.
-vec4 spherevsphere(vec4 s1, vec4 s2){ //x,y,z,radius
-	vec4 ret;
-	vec3 diff = subv3(
-				downv4(s2),
-				downv4(s1)
-			);
-	float lv3 = lengthv3(diff);
-	float l = (s1.d[3] + s2.d[3]-lv3);
-	
-	if(l < 0 || lv3 == 0) {
-		ret.d[3] = 0;return ret;
-	}
-	ret = upv3(
-		scalev3(
-			l/lv3,diff
-		)
-		,l
-	);
-	return ret;
-}
-vec4 boxvbox(aabb b1, aabb b2){ //Just points along the minimum separating axis, Nothing fancy.
-	vec4 ret = (vec4){
-		.d[0]=0,
-		.d[1]=0,
-		.d[2]=0,
-		.d[3]=0
-	};
-	vec3 sumextents = addv3(b1.e,b2.e);
-	vec3 b1c = downv4(b1.c);
-	vec3 b2c = downv4(b2.c);
-
-	vec3 b1min = subv3(b1c,b1.e);
-	vec3 b2min = subv3(b2c,b2.e);
-
-	vec3 b1max = addv3(b1c,b1.e);
-	vec3 b2max = addv3(b2c,b2.e);
-	
-	if(
-		!(
-			(fabs(b1c.d[0] - b2c.d[0]) <= sumextents.d[0]) &&
-			(fabs(b1c.d[1] - b2c.d[1]) <= sumextents.d[1]) &&
-			(fabs(b1c.d[2] - b2c.d[2]) <= sumextents.d[2])
-		)
-	){
-		return ret;
-	}
-	vec3 axispen[2];
-	axispen[0] = subv3(b1max,b2min);
-	axispen[1] = subv3(b1min,b2max);
-	ret.d[3] = axispen[0].d[0];
-	ret.d[0] = axispen[0].d[0];
-	for(int i = 1; i < 6; i++){
-		if(fabs(axispen[i/3].d[i%3]) < fabs(ret.d[3])){
-			ret = (vec4){
-						.d[0]=0,
-						.d[1]=0,
-						.d[2]=0,
-						.d[3]=axispen[i/3].d[i%3]
-					};
-			ret.d[i%3] = ret.d[3];
-		}
-	}
-	return ret;
-}
-vec3 closestpointAABB(aabb b, vec3 p){
-	vec3 b1min = subv3(downv4(b.c),b.e);
-	vec3 b1max = addv3(downv4(b.c),b.e);
-	return clampvec3(p,b1min,b1max);
-}
-vec4 spherevaabb(vec4 sph, aabb box){
-	vec4 ret;
-	vec3 p = closestpointAABB(box,downv4(sph));
-	vec3 v = subv3(p,downv4(sph));
-	f_ d2 = dotv3(v,v);
-	
-	if(d2 <= sph.d[3] * sph.d[3]){
-		f_ len = lengthv3(v);
-		f_ diff = (sph.d[3] - len);
-		if(len > 0){
-			f_ factor = diff/len;
-			vec3 bruh = scalev3(factor, v);
-			ret = upv3(bruh, diff);
-			return ret;
-		} else {
-			aabb virt;
-			virt.c = sph;
-			virt.e.d[0] = sph.d[3];
-			virt.e.d[1] = sph.d[3];
-			virt.e.d[2] = sph.d[3];
-			return boxvbox(virt,box);
-		}
-	}
-	else
-		return (vec4){
-			.d[0]=0,
-			.d[1]=0,
-			.d[2]=0,
-			.d[3]=0
-		};
-		
-}
-//end of chad math impl
-#endif
-//END Math_Library.h~~~~~~~~~~~~~~~~~~~~
-
-#endif
--- a/src/include/GLView.h
+++ /dev/null
@@ -1,72 +1,0 @@
-#ifndef _glview_h_
-#define _glview_h_
-
-#define BGL_RGB           0
-#define BGL_INDEX         1
-#define BGL_SINGLE        0
-#define BGL_DOUBLE        2
-#define BGL_DIRECT        0
-#define BGL_INDIRECT      4
-#define BGL_ACCUM         8
-#define BGL_ALPHA        16
-#define BGL_DEPTH        32
-#define BGL_OVERLAY      64
-#define BGL_UNDERLAY    128
-#define BGL_STENCIL     512
-
-#include <interface/View.h>
-#include <support/Locker.h>
-#include "GL/gl.h"
-#include "GL/oscontext.h"
-#include <game/WindowScreen.h>
-#include <game/DirectWindow.h>
-
-class BGLView : public BView {
-public:
-  BGLView(BRect rect, char *name,
-          ulong resizingMode, ulong mode,
-          ulong options);
-  virtual ~BGLView();
-
-  void LockGL();
-  void UnlockGL();
-  void SwapBuffers();
-//  BView *EmbeddedView();
-//  status_t CopyPixelsOut(BPoint source, BBitmap *dest);
-//  status_t CopyPixelsIn(BBitmap *source, BPoint dest);
-
-  virtual void ErrorCallback(GLenum errorCode);
-  virtual void Draw(BRect updateRect);
-  virtual void AttachedToWindow();
-  virtual void AllAttached();
-  virtual void DetachedFromWindow();
-  virtual void AllDetached();
-  virtual void FrameResized(float width, float height);
-//  virtual status_t Perform(perform_code d, void *arg);
-
-  //
-  // Methods below are pass-throughs to BView for the moment.
-  //
-  
-  virtual status_t Archive(BMessage *data, bool deep = true) const;
-  virtual void MessageReceived(BMessage *msg);
-  virtual void SetResizingMode(uint32 mode);
-
-  virtual void Show();
-  virtual void Hide();
-
-  virtual BHandler *ResolveSpecifier(BMessage *msg, int32 index,
-							         BMessage *specifier, int32 form,
-							         const char *property);
-  virtual status_t GetSupportedSuites(BMessage *data);
-  //void DirectConnected( direct_buffer_info *info );
-  //void EnableDirectMode( bool enabled );
-
-private:
-  ostgl_context *context;
-  BBitmap *bitmaps[2];
-  int currBitmap;
-  static BLocker locker;
-};
-
-#endif // _glview_h_
--- a/src/include/lockstepthread.h
+++ /dev/null
@@ -1,123 +1,0 @@
-#ifndef LOCKSTEPTHREAD_H
-#define LOCKSTEPTHREAD_H
-#include <pthread.h>
-#include <stdio.h>
-typedef struct {
-	pthread_mutex_t myMutex;
-	pthread_barrier_t myBarrier;
-	pthread_t myThread;
-	int isThreadLive;
-	int shouldKillThread;
-	int state;
-	void (*execute)();
-} lsthread;
-void init_lsthread(lsthread* t);
-void start_lsthread(lsthread* t);
-void kill_lsthread(lsthread* t);
-void lock(lsthread* t);
-void step(lsthread* t);
-void* lsthread_func(void* me_void);
-#ifdef LOCKSTEPTHREAD_IMPL
-//function declarations
-
-void init_lsthread(lsthread* t){
-	t->myMutex = (pthread_mutex_t)PTHREAD_MUTEX_INITIALIZER;
-	pthread_barrier_init(&t->myBarrier, NULL, 2);
-	t->isThreadLive = 0;
-	t->shouldKillThread = 0;
-	t->state = 0;
-	t->execute = NULL;
-}
-void destroy_lsthread(lsthread* t){
-	pthread_mutex_destroy(&t->myMutex);
-	pthread_barrier_destroy(&t->myBarrier);
-}
-void lock(lsthread* t){
-	if(t->state == 1)return;//if already locked, nono
-	if(!t->isThreadLive)return;
-	//puts("\nLocking! <lock>");
-	pthread_barrier_wait(&t->myBarrier);
-	//puts("\nPast Wait!");
-	if(pthread_mutex_lock(&t->myMutex))
-		puts("\nError locking mutex.");
-	t->state = 1;
-	//puts("\nPast Lock </lock>");
-}
-
-void step(lsthread* t){
-	if(t->state == -1)return; //if already stepping, nono
-	if(!t->isThreadLive)return;
-	//puts("\nStepping! <step>");
-	if(pthread_mutex_unlock(&(t->myMutex)))
-		puts("\nError unlocking mutex");
-	//puts("\nDone Unlocking!");
-	pthread_barrier_wait(&t->myBarrier);
-	t->state = -1;
-	//puts("\nPast Wait </step>");
-}
-void kill_lsthread(lsthread* t){
-	if(!t->isThreadLive)return;
-	//puts("\nTime for the thread to die...");
-	if(t->state != 1){
-		lock(t);
-		//puts("\nPast lock!");
-	}
-	t->shouldKillThread = 1;
-	
-	step(t);
-	//puts("\nPast step!");
-	pthread_join(t->myThread,NULL);
-	//if(pthread_kill(t->myThread)){
-	//	puts("\nError killing thread.");
-	//}
-	t->isThreadLive = 0;
-	t->shouldKillThread = 0;
-}
-void* lsthread_func(void* me_void){
-	lsthread* me = (lsthread*) me_void;
-	int ret = 0;
-	if (!me)pthread_exit(NULL);
-	if(!me->execute)pthread_exit(NULL);
-	while (1) {
-		//ret = pthread_cond_wait(&(me->myCond), &(me->myMutex));
-		pthread_barrier_wait(&me->myBarrier);
-		//puts("\nTHREAD ACTIVATING...");
-		pthread_mutex_lock(&me->myMutex);
-		//puts("\nTHREAD ACTIVATED");
-		//if(ret)pthread_exit(NULL);
-		if (!(me->shouldKillThread) && me->execute)
-			me->execute();
-		else if(me->shouldKillThread){
-			pthread_mutex_unlock(&me->myMutex);
-			//puts("\nTHREAD DYING...");
-			//pthread_barrier_wait(&me->myBarrier);
-			//puts("\nTHREAD DED!");
-			pthread_exit(NULL);
-		}
-		//puts("\nTHREAD DEACTIVATING...");
-		pthread_mutex_unlock(&me->myMutex);
-		//puts("\nTHREAD DEACTIVATED");
-		pthread_barrier_wait(&me->myBarrier);
-		//puts("\nTIME FOR A NEW CYCLE...");
-	}
-	pthread_exit(NULL);
-}
-void start_lsthread(lsthread* t){
-	if(t->isThreadLive)return;
-	t->isThreadLive = 1;
-	t->shouldKillThread = 0;
-	if(pthread_mutex_lock(&t->myMutex))
-		puts("\nError locking mutex.");
-	t->state = 1; //LOCKED
-	pthread_create(
-		&t->myThread,
-		NULL,
-		lsthread_func,
-		(void*)t
-	);
-}
-#endif
-//end of implementation
-
-#endif
-//end of header
\ No newline at end of file
--- a/src/include/stb_image.h
+++ /dev/null
@@ -1,8002 +1,0 @@
-/* stb_image - v2.25 - public domain image loader - http://nothings.org/stb
-								  no warranty implied; use at your own risk
-
-   Do this:
-	  #define STB_IMAGE_IMPLEMENTATION
-   before you include this file in *one* C or C++ file to create the
-implementation.
-
-   // i.e. it should look like this:
-   #include ...
-   #include ...
-   #include ...
-   #define STB_IMAGE_IMPLEMENTATION
-   #include "stb_image.h"
-
-   You can #define STBI_ASSERT(x) before the #include to avoid using assert.h.
-   And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using
-malloc,realloc,free
-
-
-   QUICK NOTES:
-	  Primarily of interest to game developers and other people who can
-		  avoid problematic images and only need the trivial interface
-
-	  JPEG baseline & progressive (12 bpc/arithmetic not supported, same as
-stock IJG lib) PNG 1/2/4/8/16-bit-per-channel
-
-	  TGA (not sure what subset, if a subset)
-	  BMP non-1bpp, non-RLE
-	  PSD (composited view only, no extra channels, 8/16 bit-per-channel)
-
-	  GIF (*comp always reports as 4-channel)
-	  HDR (radiance rgbE format)
-	  PIC (Softimage PIC)
-	  PNM (PPM and PGM binary only)
-
-	  Animated GIF still needs a proper API, but here's one way to do it:
-		  http://gist.github.com/urraka/685d9a6340b26b830d49
-
-	  - decode from memory or through FILE (define STBI_NO_STDIO to remove code)
-	  - decode from arbitrary I/O callbacks
-	  - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON)
-
-   Full documentation under "DOCUMENTATION" below.
-
-
-LICENSE
-
-  See end of file for license information.
-
-RECENT REVISION HISTORY:
-
-	  2.25  (2020-02-02) fix warnings
-	  2.24  (2020-02-02) fix warnings; thread-local failure_reason and
-flip_vertically 2.23  (2019-08-11) fix clang static analysis warning 2.22
-(2019-03-04) gif fixes, fix warnings 2.21  (2019-02-25) fix typo in comment 2.20
-(2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
-	  2.19  (2018-02-11) fix warning
-	  2.18  (2018-01-30) fix warnings
-	  2.17  (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings
-	  2.16  (2017-07-23) all functions have 16-bit variants; optimizations;
-bugfixes 2.15  (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE
-detection on GCC 2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for
-Imagenet JPGs 2.13  (2016-12-04) experimental 16-bit API, only for PNG so far;
-fixes 2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes 2.11
-(2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 RGB-format JPEG; remove
-white matting in PSD; allocate large structures on the stack; correct channel
-count for PNG & BMP 2.10  (2016-01-22) avoid warning introduced in 2.09 2.09
-(2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED
-
-   See end of file for full revision history.
-
-
- ============================    Contributors    =========================
-
- Image formats                          Extensions, features
-	Sean Barrett (jpeg, png, bmp)          Jetro Lauha (stbi_info)
-	Nicolas Schulz (hdr, psd)              Martin "SpartanJ" Golini (stbi_info)
-	Jonathan Dummer (tga)                  James "moose2000" Brown (iPhone PNG)
-	Jean-Marc Lienher (gif)                Ben "Disch" Wenger (io callbacks)
-	Tom Seddon (pic)                       Omar Cornut (1/2/4-bit PNG)
-	Thatcher Ulrich (psd)                  Nicolas Guillemot (vertical flip)
-	Ken Miller (pgm, ppm)                  Richard Mitton (16-bit PSD)
-	github:urraka (animated gif)           Junggon Kim (PNM comments)
-	Christopher Forseth (animated gif)     Daniel Gibson (16-bit TGA)
-										   socks-the-fox (16-bit PNG)
-										   Jeremy Sawicki (handle all ImageNet
-JPGs) Optimizations & bugfixes                  Mikhail Morozov (1-bit BMP)
-	Fabian "ryg" Giesen                    Anael Seghezzi (is-16-bit query)
-	Arseny Kapoulkine
-	John-Mark Allen
-	Carmelo J Fdez-Aguera
-
- Bug & warning fixes
-	Marc LeBlanc            David Woo          Guillaume George   Martins
-Mozeiko Christpher Lloyd        Jerry Jansson      Joseph Thomson     Phil
-Jordan Dave Moore              Roy Eltham         Hayaki Saito       Nathan Reed
-	Won Chun                Luke Graham        Johan Duparc       Nick Verigakis
-	the Horde3D community   Thomas Ruf         Ronny Chevalier    github:rlyeh
-	Janez Zemva             John Bartholomew   Michal Cichon github:romigrou
-	Jonathan Blow           Ken Hamada         Tero Hanninen      github:svdijk
-	Laurent Gomila          Cort Stratton      Sergio Gonzalez    github:snagar
-	Aruelien Pocheville     Thibault Reuille   Cass Everitt       github:Zelex
-	Ryamond Barbiero        Paul Du Bois       Engin Manap        github:grim210
-	Aldo Culquicondor       Philipp Wiesemann  Dale Weiler        github:sammyhw
-	Oriol Ferrer Mesia      Josh Tobin         Matthew Gregan     github:phprus
-	Julian Raschke          Gregory Mullen     Baldur Karlsson
-github:poppolopoppo Christian Floisand      Kevin Schmidt      JR Smith
-github:darealshinji Brad Weinberger         Matvey Cherevko
-github:Michaelangel007 Blazej Dariusz Roszkowski                  Alexander
-Veselov
-*/
-
-#ifndef STBI_INCLUDE_STB_IMAGE_H
-#define STBI_INCLUDE_STB_IMAGE_H
-
-// DOCUMENTATION
-//
-// Limitations:
-//    - no 12-bit-per-channel JPEG
-//    - no JPEGs with arithmetic coding
-//    - GIF always returns *comp=4
-//
-// Basic usage (see HDR discussion below for HDR usage):
-//    int x,y,n;
-//    unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
-//    // ... process data if not NULL ...
-//    // ... x = width, y = height, n = # 8-bit components per pixel ...
-//    // ... replace '0' with '1'..'4' to force that many components per pixel
-//    // ... but 'n' will always be the number that it would have been if you
-//    said 0 stbi_image_free(data)
-//
-// Standard parameters:
-//    int *x                 -- outputs image width in pixels
-//    int *y                 -- outputs image height in pixels
-//    int *channels_in_file  -- outputs # of image components in image file
-//    int desired_channels   -- if non-zero, # of image components requested in
-//    result
-//
-// The return value from an image loader is an 'unsigned char *' which points
-// to the pixel data, or NULL on an allocation failure or if the image is
-// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels,
-// with each pixel consisting of N interleaved 8-bit components; the first
-// pixel pointed to is top-left-most in the image. There is no padding between
-// image scanlines or between pixels, regardless of format. The number of
-// components N is 'desired_channels' if desired_channels is non-zero, or
-// *channels_in_file otherwise. If desired_channels is non-zero,
-// *channels_in_file has the number of components that _would_ have been
-// output otherwise. E.g. if you set desired_channels to 4, you will always
-// get RGBA output, but you can check *channels_in_file to see if it's trivially
-// opaque because e.g. there were only 3 channels in the source image.
-//
-// An output image with N components has the following components interleaved
-// in this order in each pixel:
-//
-//     N=#comp     components
-//       1           grey
-//       2           grey, alpha
-//       3           red, green, blue
-//       4           red, green, blue, alpha
-//
-// If image loading fails for any reason, the return value will be NULL,
-// and *x, *y, *channels_in_file will be unchanged. The function
-// stbi_failure_reason() can be queried for an extremely brief, end-user
-// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS
-// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get
-// slightly more user-friendly ones.
-//
-// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
-//
-// ===========================================================================
-//
-// UNICODE:
-//
-//   If compiling for Windows and you wish to use Unicode filenames, compile
-//   with
-//       #define STBI_WINDOWS_UTF8
-//   and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert
-//   Windows wchar_t filenames to utf8.
-//
-// ===========================================================================
-//
-// Philosophy
-//
-// stb libraries are designed with the following priorities:
-//
-//    1. easy to use
-//    2. easy to maintain
-//    3. good performance
-//
-// Sometimes I let "good performance" creep up in priority over "easy to
-// maintain", and for best performance I may provide less-easy-to-use APIs that
-// give higher performance, in addition to the easy-to-use ones. Nevertheless,
-// it's important to keep in mind that from the standpoint of you, a client of
-// this library, all you care about is #1 and #3, and stb libraries DO NOT
-// emphasize #3 above all.
-//
-// Some secondary priorities arise directly from the first two, some of which
-// provide more explicit reasons why performance can't be emphasized.
-//
-//    - Portable ("ease of use")
-//    - Small source code footprint ("easy to maintain")
-//    - No dependencies ("ease of use")
-//
-// ===========================================================================
-//
-// I/O callbacks
-//
-// I/O callbacks allow you to read from arbitrary sources, like packaged
-// files or some other source. Data read from callbacks are processed
-// through a small internal buffer (currently 128 bytes) to try to reduce
-// overhead.
-//
-// The three functions you must define are "read" (reads some bytes of data),
-// "skip" (skips some bytes of data), "eof" (reports if the stream is at the
-// end).
-//
-// ===========================================================================
-//
-// SIMD support
-//
-// The JPEG decoder will try to automatically use SIMD kernels on x86 when
-// supported by the compiler. For ARM Neon support, you must explicitly
-// request it.
-//
-// (The old do-it-yourself SIMD API is no longer supported in the current
-// code.)
-//
-// On x86, SSE2 will automatically be used when available based on a run-time
-// test; if not, the generic C versions are used as a fall-back. On ARM targets,
-// the typical path is to have separate builds for NEON and non-NEON devices
-// (at least this is true for iOS and Android). Therefore, the NEON support is
-// toggled by a build flag: define STBI_NEON to get NEON loops.
-//
-// If for some reason you do not want to use any of SIMD code, or if
-// you have issues compiling it, you can disable it entirely by
-// defining STBI_NO_SIMD.
-//
-// ===========================================================================
-//
-// HDR image support   (disable by defining STBI_NO_HDR)
-//
-// stb_image supports loading HDR images in general, and currently the Radiance
-// .HDR file format specifically. You can still load any file through the
-// existing interface; if you attempt to load an HDR file, it will be
-// automatically remapped to LDR, assuming gamma 2.2 and an arbitrary scale
-// factor defaulting to 1; both of these constants can be reconfigured through
-// this interface:
-//
-//     stbi_hdr_to_ldr_gamma(2.2f);
-//     stbi_hdr_to_ldr_scale(1.0f);
-//
-// (note, do not use _inverse_ constants; stbi_image will invert them
-// appropriately).
-//
-// Additionally, there is a new, parallel interface for loading files as
-// (linear) floats to preserve the full dynamic range:
-//
-//    float *data = stbi_loadf(filename, &x, &y, &n, 0);
-//
-// If you load LDR images through this interface, those images will
-// be promoted to floating point values, run through the inverse of
-// constants corresponding to the above:
-//
-//     stbi_ldr_to_hdr_scale(1.0f);
-//     stbi_ldr_to_hdr_gamma(2.2f);
-//
-// Finally, given a filename (or an open file or memory block--see header
-// file for details) containing image data, you can query for the "most
-// appropriate" interface to use (that is, whether the image is HDR or
-// not), using:
-//
-//     stbi_is_hdr(char *filename);
-//
-// ===========================================================================
-//
-// iPhone PNG support:
-//
-// By default we convert iphone-formatted PNGs back to RGB, even though
-// they are internally encoded differently. You can disable this conversion
-// by calling stbi_convert_iphone_png_to_rgb(0), in which case
-// you will always just get the native iphone "format" through (which
-// is BGR stored in RGB).
-//
-// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
-// pixel to remove any premultiplied alpha *only* if the image file explicitly
-// says there's premultiplied data (currently only happens in iPhone images,
-// and only if iPhone convert-to-rgb processing is on).
-//
-// ===========================================================================
-//
-// ADDITIONAL CONFIGURATION
-//
-//  - You can suppress implementation of any of the decoders to reduce
-//    your code footprint by #defining one or more of the following
-//    symbols before creating the implementation.
-//
-//        STBI_NO_JPEG
-//        STBI_NO_PNG
-//        STBI_NO_BMP
-//        STBI_NO_PSD
-//        STBI_NO_TGA
-//        STBI_NO_GIF
-//        STBI_NO_HDR
-//        STBI_NO_PIC
-//        STBI_NO_PNM   (.ppm and .pgm)
-//
-//  - You can request *only* certain decoders and suppress all other ones
-//    (this will be more forward-compatible, as addition of new decoders
-//    doesn't require you to disable them explicitly):
-//
-//        STBI_ONLY_JPEG
-//        STBI_ONLY_PNG
-//        STBI_ONLY_BMP
-//        STBI_ONLY_PSD
-//        STBI_ONLY_TGA
-//        STBI_ONLY_GIF
-//        STBI_ONLY_HDR
-//        STBI_ONLY_PIC
-//        STBI_ONLY_PNM   (.ppm and .pgm)
-//
-//   - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still
-//     want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB
-//
-
-#ifndef STBI_NO_STDIO
-#include <stdio.h>
-#endif // STBI_NO_STDIO
-
-#define STBI_VERSION 1
-
-enum {
-	STBI_default = 0, // only used for desired_channels
-
-	STBI_grey = 1,
-	STBI_grey_alpha = 2,
-	STBI_rgb = 3,
-	STBI_rgb_alpha = 4
-};
-
-#include <stdlib.h>
-typedef unsigned char stbi_uc;
-typedef unsigned short stbi_us;
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef STBIDEF
-#ifdef STB_IMAGE_STATIC
-#define STBIDEF static
-#else
-#define STBIDEF extern
-#endif
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// PRIMARY API - works on images of any type
-//
-
-//
-// load image by filename, open file, or memory buffer
-//
-
-typedef struct {
-	int (*read)(void* user, char* data,
-				int size);			 // fill 'data' with 'size' bytes.  return number of
-									 // bytes actually read
-	void (*skip)(void* user, int n); // skip the next 'n' bytes, or 'unget' the
-									 // last -n bytes if negative
-	int (*eof)(void* user);			 // returns nonzero if we are at end of file/data
-} stbi_io_callbacks;
-
-////////////////////////////////////
-//
-// 8-bits-per-channel interface
-//
-
-STBIDEF stbi_uc* stbi_load_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels);
-STBIDEF stbi_uc* stbi_load_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels);
-
-#ifndef STBI_NO_STDIO
-STBIDEF stbi_uc* stbi_load(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels);
-STBIDEF stbi_uc* stbi_load_from_file(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels);
-// for stbi_load_from_file, file pointer is left pointing immediately after
-// image
-#endif
-
-#ifndef STBI_NO_GIF
-STBIDEF stbi_uc* stbi_load_gif_from_memory(stbi_uc const* buffer, int len, int** delays, int* x, int* y, int* z, int* comp, int req_comp);
-#endif
-
-#ifdef STBI_WINDOWS_UTF8
-STBIDEF int stbi_convert_wchar_to_utf8(char* buffer, size_t bufferlen, const wchar_t* input);
-#endif
-
-////////////////////////////////////
-//
-// 16-bits-per-channel interface
-//
-
-STBIDEF stbi_us* stbi_load_16_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels);
-STBIDEF stbi_us* stbi_load_16_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels);
-
-#ifndef STBI_NO_STDIO
-STBIDEF stbi_us* stbi_load_16(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels);
-STBIDEF stbi_us* stbi_load_from_file_16(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels);
-#endif
-
-////////////////////////////////////
-//
-// float-per-channel interface
-//
-#ifndef STBI_NO_LINEAR
-STBIDEF float* stbi_loadf_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels);
-STBIDEF float* stbi_loadf_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels);
-
-#ifndef STBI_NO_STDIO
-STBIDEF float* stbi_loadf(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels);
-STBIDEF float* stbi_loadf_from_file(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels);
-#endif
-#endif
-
-#ifndef STBI_NO_HDR
-STBIDEF void stbi_hdr_to_ldr_gamma(float gamma);
-STBIDEF void stbi_hdr_to_ldr_scale(float scale);
-#endif // STBI_NO_HDR
-
-#ifndef STBI_NO_LINEAR
-STBIDEF void stbi_ldr_to_hdr_gamma(float gamma);
-STBIDEF void stbi_ldr_to_hdr_scale(float scale);
-#endif // STBI_NO_LINEAR
-
-// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR
-STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const* clbk, void* user);
-STBIDEF int stbi_is_hdr_from_memory(stbi_uc const* buffer, int len);
-#ifndef STBI_NO_STDIO
-STBIDEF int stbi_is_hdr(char const* filename);
-STBIDEF int stbi_is_hdr_from_file(FILE* f);
-#endif // STBI_NO_STDIO
-
-// get a VERY brief reason for failure
-// on most compilers (and ALL modern mainstream compilers) this is threadsafe
-STBIDEF const char* stbi_failure_reason(void);
-
-// free the loaded image -- this is just free()
-STBIDEF void stbi_image_free(void* retval_from_stbi_load);
-
-// get image dimensions & components without fully decoding
-STBIDEF int stbi_info_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp);
-STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp);
-STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const* buffer, int len);
-STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const* clbk, void* user);
-
-#ifndef STBI_NO_STDIO
-STBIDEF int stbi_info(char const* filename, int* x, int* y, int* comp);
-STBIDEF int stbi_info_from_file(FILE* f, int* x, int* y, int* comp);
-STBIDEF int stbi_is_16_bit(char const* filename);
-STBIDEF int stbi_is_16_bit_from_file(FILE* f);
-#endif
-
-// for image formats that explicitly notate that they have premultiplied alpha,
-// we just return the colors as stored in the file. set this flag to force
-// unpremultiplication. results are undefined if the unpremultiply overflow.
-STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);
-
-// indicate whether we should process iphone images back to canonical format,
-// or just pass them through "as-is"
-STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);
-
-// flip the image vertically, so the first pixel in the output array is the
-// bottom left
-STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
-
-// as above, but only applies to images loaded on the thread that calls the
-// function this function is only available if your compiler supports
-// thread-local variables; calling it will fail to link if your compiler doesn't
-STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip);
-
-// ZLIB client - used by PNG, available for other purposes
-
-STBIDEF char* stbi_zlib_decode_malloc_guesssize(const char* buffer, int len, int initial_size, int* outlen);
-STBIDEF char* stbi_zlib_decode_malloc_guesssize_headerflag(const char* buffer, int len, int initial_size, int* outlen, int parse_header);
-STBIDEF char* stbi_zlib_decode_malloc(const char* buffer, int len, int* outlen);
-STBIDEF int stbi_zlib_decode_buffer(char* obuffer, int olen, const char* ibuffer, int ilen);
-
-STBIDEF char* stbi_zlib_decode_noheader_malloc(const char* buffer, int len, int* outlen);
-STBIDEF int stbi_zlib_decode_noheader_buffer(char* obuffer, int olen, const char* ibuffer, int ilen);
-
-#ifdef __cplusplus
-}
-#endif
-
-//
-//
-////   end header file   /////////////////////////////////////////////////////
-#endif // STBI_INCLUDE_STB_IMAGE_H
-
-#ifdef STB_IMAGE_IMPLEMENTATION
-
-#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) ||                         \
-	defined(STBI_ONLY_PSD) || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) || defined(STBI_ONLY_ZLIB)
-#ifndef STBI_ONLY_JPEG
-#define STBI_NO_JPEG
-#endif
-#ifndef STBI_ONLY_PNG
-#define STBI_NO_PNG
-#endif
-#ifndef STBI_ONLY_BMP
-#define STBI_NO_BMP
-#endif
-#ifndef STBI_ONLY_PSD
-#define STBI_NO_PSD
-#endif
-#ifndef STBI_ONLY_TGA
-#define STBI_NO_TGA
-#endif
-#ifndef STBI_ONLY_GIF
-#define STBI_NO_GIF
-#endif
-#ifndef STBI_ONLY_HDR
-#define STBI_NO_HDR
-#endif
-#ifndef STBI_ONLY_PIC
-#define STBI_NO_PIC
-#endif
-#ifndef STBI_ONLY_PNM
-#define STBI_NO_PNM
-#endif
-#endif
-
-#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB)
-#define STBI_NO_ZLIB
-#endif
-
-#include <limits.h>
-#include <stdarg.h>
-#include <stddef.h> // ptrdiff_t on osx
-#include <stdlib.h>
-#include <string.h>
-
-#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
-#include <math.h> // ldexp, pow
-#endif
-
-#ifndef STBI_NO_STDIO
-#include <stdio.h>
-#endif
-
-#ifndef STBI_ASSERT
-#include <assert.h>
-#define STBI_ASSERT(x) assert(x)
-#endif
-
-#ifdef __cplusplus
-#define STBI_EXTERN extern "C"
-#else
-#define STBI_EXTERN extern
-#endif
-
-#ifndef _MSC_VER
-#ifdef __cplusplus
-#define stbi_inline inline
-#else
-#define stbi_inline
-#endif
-#else
-#define stbi_inline __forceinline
-#endif
-
-#ifndef STBI_NO_THREAD_LOCALS
-#if defined(__cplusplus) && __cplusplus >= 201103L
-#define STBI_THREAD_LOCAL thread_local
-#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
-#define STBI_THREAD_LOCAL _Thread_local
-#elif defined(__GNUC__)
-#define STBI_THREAD_LOCAL __thread
-#elif defined(_MSC_VER)
-#define STBI_THREAD_LOCAL __declspec(thread)
-#endif
-#endif
-
-#ifdef _MSC_VER
-typedef unsigned short stbi__uint16;
-typedef signed short stbi__int16;
-typedef unsigned int stbi__uint32;
-typedef signed int stbi__int32;
-#else
-#include <stdint.h>
-typedef uint16_t stbi__uint16;
-typedef int16_t stbi__int16;
-typedef uint32_t stbi__uint32;
-typedef int32_t stbi__int32;
-#endif
-
-// should produce compiler error if size is wrong
-typedef unsigned char validate_uint32[sizeof(stbi__uint32) == 4 ? 1 : -1];
-
-#ifdef _MSC_VER
-#define STBI_NOTUSED(v) (void)(v)
-#else
-#define STBI_NOTUSED(v) (void)sizeof(v)
-#endif
-
-#ifdef _MSC_VER
-#define STBI_HAS_LROTL
-#endif
-
-#ifdef STBI_HAS_LROTL
-#define stbi_lrot(x, y) _lrotl(x, y)
-#else
-#define stbi_lrot(x, y) (((x) << (y)) | ((x) >> (32 - (y))))
-#endif
-
-#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED))
-// ok
-#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED)
-// ok
-#else
-#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)."
-#endif
-
-#ifndef STBI_MALLOC
-#define STBI_MALLOC(sz) malloc(sz)
-#define STBI_REALLOC(p, newsz) realloc(p, newsz)
-#define STBI_FREE(p) free(p)
-#endif
-
-#ifndef STBI_REALLOC_SIZED
-#define STBI_REALLOC_SIZED(p, oldsz, newsz) STBI_REALLOC(p, newsz)
-#endif
-
-// x86/x64 detection
-#if defined(__x86_64__) || defined(_M_X64)
-#define STBI__X64_TARGET
-#elif defined(__i386) || defined(_M_IX86)
-#define STBI__X86_TARGET
-#endif
-
-#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD)
-// gcc doesn't support sse2 intrinsics unless you compile with -msse2,
-// which in turn means it gets to use SSE2 everywhere. This is unfortunate,
-// but previous attempts to provide the SSE2 functions with runtime
-// detection caused numerous issues. The way architecture extensions are
-// exposed in GCC/Clang is, sadly, not really suited for one-file libs.
-// New behavior: if compiled with -msse2, we use SSE2 without any
-// detection; if not, we don't use it at all.
-#define STBI_NO_SIMD
-#endif
-
-#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD)
-// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid
-// STBI__X64_TARGET
-//
-// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the
-// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant.
-// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not
-// simultaneously enabling "-mstackrealign".
-//
-// See https://github.com/nothings/stb/issues/81 for more information.
-//
-// So default to no SSE2 on 32-bit MinGW. If you've read this far and added
-// -mstackrealign to your build settings, feel free to #define
-// STBI_MINGW_ENABLE_SSE2.
-#define STBI_NO_SIMD
-#endif
-
-#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET))
-#define STBI_SSE2
-#include <emmintrin.h>
-
-#ifdef _MSC_VER
-
-#if _MSC_VER >= 1400 // not VC6
-#include <intrin.h>  // __cpuid
-static int stbi__cpuid3(void) {
-	int info[4];
-	__cpuid(info, 1);
-	return info[3];
-}
-#else
-static int stbi__cpuid3(void) {
-	int res;
-	__asm {
-      mov  eax,1
-      cpuid
-      mov  res,edx
-	}
-	return res;
-}
-#endif
-
-#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
-
-#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
-static int stbi__sse2_available(void) {
-	int info3 = stbi__cpuid3();
-	return ((info3 >> 26) & 1) != 0;
-}
-#endif
-
-#else // assume GCC-style if not VC++
-#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
-
-#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
-static int stbi__sse2_available(void) {
-	// If we're even attempting to compile this on GCC/Clang, that means
-	// -msse2 is on, which means the compiler is allowed to use SSE2
-	// instructions at will, and so are we.
-	return 1;
-}
-#endif
-
-#endif
-#endif
-
-// ARM NEON
-#if defined(STBI_NO_SIMD) && defined(STBI_NEON)
-#undef STBI_NEON
-#endif
-
-#ifdef STBI_NEON
-#include <arm_neon.h>
-// assume GCC or Clang on ARM targets
-#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
-#endif
-
-#ifndef STBI_SIMD_ALIGN
-#define STBI_SIMD_ALIGN(type, name) type name
-#endif
-
-///////////////////////////////////////////////
-//
-//  stbi__context struct and start_xxx functions
-
-// stbi__context structure is our basic context used by all images, so it
-// contains all the IO context, plus some basic image information
-typedef struct {
-	stbi__uint32 img_x, img_y;
-	int img_n, img_out_n;
-
-	stbi_io_callbacks io;
-	void* io_user_data;
-
-	int read_from_callbacks;
-	int buflen;
-	stbi_uc buffer_start[128];
-
-	stbi_uc *img_buffer, *img_buffer_end;
-	stbi_uc *img_buffer_original, *img_buffer_original_end;
-} stbi__context;
-
-static void stbi__refill_buffer(stbi__context* s);
-
-// initialize a memory-decode context
-static void stbi__start_mem(stbi__context* s, stbi_uc const* buffer, int len) {
-	s->io.read = NULL;
-	s->read_from_callbacks = 0;
-	s->img_buffer = s->img_buffer_original = (stbi_uc*)buffer;
-	s->img_buffer_end = s->img_buffer_original_end = (stbi_uc*)buffer + len;
-}
-
-// initialize a callback-based context
-static void stbi__start_callbacks(stbi__context* s, stbi_io_callbacks* c, void* user) {
-	s->io = *c;
-	s->io_user_data = user;
-	s->buflen = sizeof(s->buffer_start);
-	s->read_from_callbacks = 1;
-	s->img_buffer_original = s->buffer_start;
-	stbi__refill_buffer(s);
-	s->img_buffer_original_end = s->img_buffer_end;
-}
-
-#ifndef STBI_NO_STDIO
-
-static int stbi__stdio_read(void* user, char* data, int size) { return (int)fread(data, 1, size, (FILE*)user); }
-
-static void stbi__stdio_skip(void* user, int n) { fseek((FILE*)user, n, SEEK_CUR); }
-
-static int stbi__stdio_eof(void* user) { return feof((FILE*)user); }
-
-static stbi_io_callbacks stbi__stdio_callbacks = {
-	stbi__stdio_read,
-	stbi__stdio_skip,
-	stbi__stdio_eof,
-};
-
-static void stbi__start_file(stbi__context* s, FILE* f) { stbi__start_callbacks(s, &stbi__stdio_callbacks, (void*)f); }
-
-// static void stop_file(stbi__context *s) { }
-
-#endif // !STBI_NO_STDIO
-
-static void stbi__rewind(stbi__context* s) {
-	// conceptually rewind SHOULD rewind to the beginning of the stream,
-	// but we just rewind to the beginning of the initial buffer, because
-	// we only use it after doing 'test', which only ever looks at at most 92
-	// bytes
-	s->img_buffer = s->img_buffer_original;
-	s->img_buffer_end = s->img_buffer_original_end;
-}
-
-enum { STBI_ORDER_RGB, STBI_ORDER_BGR };
-
-typedef struct {
-	int bits_per_channel;
-	int num_channels;
-	int channel_order;
-} stbi__result_info;
-
-#ifndef STBI_NO_JPEG
-static int stbi__jpeg_test(stbi__context* s);
-static void* stbi__jpeg_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
-static int stbi__jpeg_info(stbi__context* s, int* x, int* y, int* comp);
-#endif
-
-#ifndef STBI_NO_PNG
-static int stbi__png_test(stbi__context* s);
-static void* stbi__png_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
-static int stbi__png_info(stbi__context* s, int* x, int* y, int* comp);
-static int stbi__png_is16(stbi__context* s);
-#endif
-
-#ifndef STBI_NO_BMP
-static int stbi__bmp_test(stbi__context* s);
-static void* stbi__bmp_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
-static int stbi__bmp_info(stbi__context* s, int* x, int* y, int* comp);
-#endif
-
-#ifndef STBI_NO_TGA
-static int stbi__tga_test(stbi__context* s);
-static void* stbi__tga_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
-static int stbi__tga_info(stbi__context* s, int* x, int* y, int* comp);
-#endif
-
-#ifndef STBI_NO_PSD
-static int stbi__psd_test(stbi__context* s);
-static void* stbi__psd_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc);
-static int stbi__psd_info(stbi__context* s, int* x, int* y, int* comp);
-static int stbi__psd_is16(stbi__context* s);
-#endif
-
-#ifndef STBI_NO_HDR
-static int stbi__hdr_test(stbi__context* s);
-static float* stbi__hdr_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
-static int stbi__hdr_info(stbi__context* s, int* x, int* y, int* comp);
-#endif
-
-#ifndef STBI_NO_PIC
-static int stbi__pic_test(stbi__context* s);
-static void* stbi__pic_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
-static int stbi__pic_info(stbi__context* s, int* x, int* y, int* comp);
-#endif
-
-#ifndef STBI_NO_GIF
-static int stbi__gif_test(stbi__context* s);
-static void* stbi__gif_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
-static void* stbi__load_gif_main(stbi__context* s, int** delays, int* x, int* y, int* z, int* comp, int req_comp);
-static int stbi__gif_info(stbi__context* s, int* x, int* y, int* comp);
-#endif
-
-#ifndef STBI_NO_PNM
-static int stbi__pnm_test(stbi__context* s);
-static void* stbi__pnm_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri);
-static int stbi__pnm_info(stbi__context* s, int* x, int* y, int* comp);
-#endif
-
-static
-#ifdef STBI_THREAD_LOCAL
-	STBI_THREAD_LOCAL
-#endif
-	const char* stbi__g_failure_reason;
-
-STBIDEF const char* stbi_failure_reason(void) { return stbi__g_failure_reason; }
-
-#ifndef STBI_NO_FAILURE_STRINGS
-static int stbi__err(const char* str) {
-	stbi__g_failure_reason = str;
-	return 0;
-}
-#endif
-
-static void* stbi__malloc(size_t size) { return STBI_MALLOC(size); }
-
-// stb_image uses ints pervasively, including for offset calculations.
-// therefore the largest decoded image size we can support with the
-// current code, even on 64-bit targets, is INT_MAX. this is not a
-// significant limitation for the intended use case.
-//
-// we do, however, need to make sure our size calculations don't
-// overflow. hence a few helper functions for size calculations that
-// multiply integers together, making sure that they're non-negative
-// and no overflow occurs.
-
-// return 1 if the sum is valid, 0 on overflow.
-// negative terms are considered invalid.
-static int stbi__addsizes_valid(int a, int b) {
-	if (b < 0)
-		return 0;
-	// now 0 <= b <= INT_MAX, hence also
-	// 0 <= INT_MAX - b <= INTMAX.
-	// And "a + b <= INT_MAX" (which might overflow) is the
-	// same as a <= INT_MAX - b (no overflow)
-	return a <= INT_MAX - b;
-}
-
-// returns 1 if the product is valid, 0 on overflow.
-// negative factors are considered invalid.
-static int stbi__mul2sizes_valid(int a, int b) {
-	if (a < 0 || b < 0)
-		return 0;
-	if (b == 0)
-		return 1; // mul-by-0 is always safe
-	// portable way to check for no overflows in a*b
-	return a <= INT_MAX / b;
-}
-
-#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
-// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow
-static int stbi__mad2sizes_valid(int a, int b, int add) { return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a * b, add); }
-#endif
-
-// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow
-static int stbi__mad3sizes_valid(int a, int b, int c, int add) {
-	return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && stbi__addsizes_valid(a * b * c, add);
-}
-
-// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't
-// overflow
-#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
-static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) {
-	return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && stbi__mul2sizes_valid(a * b * c, d) && stbi__addsizes_valid(a * b * c * d, add);
-}
-#endif
-
-#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
-// mallocs with size overflow checking
-static void* stbi__malloc_mad2(int a, int b, int add) {
-	if (!stbi__mad2sizes_valid(a, b, add))
-		return NULL;
-	return stbi__malloc(a * b + add);
-}
-#endif
-
-static void* stbi__malloc_mad3(int a, int b, int c, int add) {
-	if (!stbi__mad3sizes_valid(a, b, c, add))
-		return NULL;
-	return stbi__malloc(a * b * c + add);
-}
-
-#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
-static void* stbi__malloc_mad4(int a, int b, int c, int d, int add) {
-	if (!stbi__mad4sizes_valid(a, b, c, d, add))
-		return NULL;
-	return stbi__malloc(a * b * c * d + add);
-}
-#endif
-
-// stbi__err - error
-// stbi__errpf - error returning pointer to float
-// stbi__errpuc - error returning pointer to unsigned char
-
-#ifdef STBI_NO_FAILURE_STRINGS
-#define stbi__err(x, y) 0
-#elif defined(STBI_FAILURE_USERMSG)
-#define stbi__err(x, y) stbi__err(y)
-#else
-#define stbi__err(x, y) stbi__err(x)
-#endif
-
-#define stbi__errpf(x, y) ((float*)(size_t)(stbi__err(x, y) ? NULL : NULL))
-#define stbi__errpuc(x, y) ((unsigned char*)(size_t)(stbi__err(x, y) ? NULL : NULL))
-
-STBIDEF void stbi_image_free(void* retval_from_stbi_load) { STBI_FREE(retval_from_stbi_load); }
-
-#ifndef STBI_NO_LINEAR
-static float* stbi__ldr_to_hdr(stbi_uc* data, int x, int y, int comp);
-#endif
-
-#ifndef STBI_NO_HDR
-static stbi_uc* stbi__hdr_to_ldr(float* data, int x, int y, int comp);
-#endif
-
-static int stbi__vertically_flip_on_load_global = 0;
-
-STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) { stbi__vertically_flip_on_load_global = flag_true_if_should_flip; }
-
-#ifndef STBI_THREAD_LOCAL
-#define stbi__vertically_flip_on_load stbi__vertically_flip_on_load_global
-#else
-static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set;
-
-STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip) {
-	stbi__vertically_flip_on_load_local = flag_true_if_should_flip;
-	stbi__vertically_flip_on_load_set = 1;
-}
-
-#define stbi__vertically_flip_on_load (stbi__vertically_flip_on_load_set ? stbi__vertically_flip_on_load_local : stbi__vertically_flip_on_load_global)
-#endif // STBI_THREAD_LOCAL
-
-static void* stbi__load_main(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc) {
-	memset(ri, 0,
-		   sizeof(*ri));				// make sure it's initialized if we add new fields
-	ri->bits_per_channel = 8;			// default is 8 so most paths don't have to be changed
-	ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here
-										// so we can add BGR order
-	ri->num_channels = 0;
-
-#ifndef STBI_NO_JPEG
-	if (stbi__jpeg_test(s))
-		return stbi__jpeg_load(s, x, y, comp, req_comp, ri);
-#endif
-#ifndef STBI_NO_PNG
-	if (stbi__png_test(s))
-		return stbi__png_load(s, x, y, comp, req_comp, ri);
-#endif
-#ifndef STBI_NO_BMP
-	if (stbi__bmp_test(s))
-		return stbi__bmp_load(s, x, y, comp, req_comp, ri);
-#endif
-#ifndef STBI_NO_GIF
-	if (stbi__gif_test(s))
-		return stbi__gif_load(s, x, y, comp, req_comp, ri);
-#endif
-#ifndef STBI_NO_PSD
-	if (stbi__psd_test(s))
-		return stbi__psd_load(s, x, y, comp, req_comp, ri, bpc);
-#else
-	STBI_NOTUSED(bpc);
-#endif
-#ifndef STBI_NO_PIC
-	if (stbi__pic_test(s))
-		return stbi__pic_load(s, x, y, comp, req_comp, ri);
-#endif
-#ifndef STBI_NO_PNM
-	if (stbi__pnm_test(s))
-		return stbi__pnm_load(s, x, y, comp, req_comp, ri);
-#endif
-
-#ifndef STBI_NO_HDR
-	if (stbi__hdr_test(s)) {
-		float* hdr = stbi__hdr_load(s, x, y, comp, req_comp, ri);
-		return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
-	}
-#endif
-
-#ifndef STBI_NO_TGA
-	// test tga last because it's a crappy test!
-	if (stbi__tga_test(s))
-		return stbi__tga_load(s, x, y, comp, req_comp, ri);
-#endif
-
-	return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt");
-}
-
-static stbi_uc* stbi__convert_16_to_8(stbi__uint16* orig, int w, int h, int channels) {
-	int i;
-	int img_len = w * h * channels;
-	stbi_uc* reduced;
-
-	reduced = (stbi_uc*)stbi__malloc(img_len);
-	if (reduced == NULL)
-		return stbi__errpuc("outofmem", "Out of memory");
-
-	for (i = 0; i < img_len; ++i)
-		reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient
-													   // approx of 16->8 bit scaling
-
-	STBI_FREE(orig);
-	return reduced;
-}
-
-static stbi__uint16* stbi__convert_8_to_16(stbi_uc* orig, int w, int h, int channels) {
-	int i;
-	int img_len = w * h * channels;
-	stbi__uint16* enlarged;
-
-	enlarged = (stbi__uint16*)stbi__malloc(img_len * 2);
-	if (enlarged == NULL)
-		return (stbi__uint16*)stbi__errpuc("outofmem", "Out of memory");
-
-	for (i = 0; i < img_len; ++i)
-		enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff
-
-	STBI_FREE(orig);
-	return enlarged;
-}
-
-static void stbi__vertical_flip(void* image, int w, int h, int bytes_per_pixel) {
-	int row;
-	size_t bytes_per_row = (size_t)w * bytes_per_pixel;
-	stbi_uc temp[2048];
-	stbi_uc* bytes = (stbi_uc*)image;
-
-	for (row = 0; row < (h >> 1); row++) {
-		stbi_uc* row0 = bytes + row * bytes_per_row;
-		stbi_uc* row1 = bytes + (h - row - 1) * bytes_per_row;
-		// swap row0 with row1
-		size_t bytes_left = bytes_per_row;
-		while (bytes_left) {
-			size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp);
-			memcpy(temp, row0, bytes_copy);
-			memcpy(row0, row1, bytes_copy);
-			memcpy(row1, temp, bytes_copy);
-			row0 += bytes_copy;
-			row1 += bytes_copy;
-			bytes_left -= bytes_copy;
-		}
-	}
-}
-
-#ifndef STBI_NO_GIF
-static void stbi__vertical_flip_slices(void* image, int w, int h, int z, int bytes_per_pixel) {
-	int slice;
-	int slice_size = w * h * bytes_per_pixel;
-
-	stbi_uc* bytes = (stbi_uc*)image;
-	for (slice = 0; slice < z; ++slice) {
-		stbi__vertical_flip(bytes, w, h, bytes_per_pixel);
-		bytes += slice_size;
-	}
-}
-#endif
-
-static unsigned char* stbi__load_and_postprocess_8bit(stbi__context* s, int* x, int* y, int* comp, int req_comp) {
-	stbi__result_info ri;
-	void* result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8);
-
-	if (result == NULL)
-		return NULL;
-
-	if (ri.bits_per_channel != 8) {
-		STBI_ASSERT(ri.bits_per_channel == 16);
-		result = stbi__convert_16_to_8((stbi__uint16*)result, *x, *y, req_comp == 0 ? *comp : req_comp);
-		ri.bits_per_channel = 8;
-	}
-
-	// @TODO: move stbi__convert_format to here
-
-	if (stbi__vertically_flip_on_load) {
-		int channels = req_comp ? req_comp : *comp;
-		stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc));
-	}
-
-	return (unsigned char*)result;
-}
-
-static stbi__uint16* stbi__load_and_postprocess_16bit(stbi__context* s, int* x, int* y, int* comp, int req_comp) {
-	stbi__result_info ri;
-	void* result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16);
-
-	if (result == NULL)
-		return NULL;
-
-	if (ri.bits_per_channel != 16) {
-		STBI_ASSERT(ri.bits_per_channel == 8);
-		result = stbi__convert_8_to_16((stbi_uc*)result, *x, *y, req_comp == 0 ? *comp : req_comp);
-		ri.bits_per_channel = 16;
-	}
-
-	// @TODO: move stbi__convert_format16 to here
-	// @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to
-	// keep more precision
-
-	if (stbi__vertically_flip_on_load) {
-		int channels = req_comp ? req_comp : *comp;
-		stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16));
-	}
-
-	return (stbi__uint16*)result;
-}
-
-#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR)
-static void stbi__float_postprocess(float* result, int* x, int* y, int* comp, int req_comp) {
-	if (stbi__vertically_flip_on_load && result != NULL) {
-		int channels = req_comp ? req_comp : *comp;
-		stbi__vertical_flip(result, *x, *y, channels * sizeof(float));
-	}
-}
-#endif
-
-#ifndef STBI_NO_STDIO
-
-#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
-STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char* str, int cbmb, wchar_t* widestr,
-																	int cchwide);
-STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t* widestr, int cchwide, char* str,
-																	int cbmb, const char* defchar, int* used_default);
-#endif
-
-#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
-STBIDEF int stbi_convert_wchar_to_utf8(char* buffer, size_t bufferlen, const wchar_t* input) {
-	return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int)bufferlen, NULL, NULL);
-}
-#endif
-
-static FILE* stbi__fopen(char const* filename, char const* mode) {
-	FILE* f;
-#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
-	wchar_t wMode[64];
-	wchar_t wFilename[1024];
-	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)))
-		return 0;
-
-	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)))
-		return 0;
-
-#if _MSC_VER >= 1400
-	if (0 != _wfopen_s(&f, wFilename, wMode))
-		f = 0;
-#else
-	f = _wfopen(wFilename, wMode);
-#endif
-
-#elif defined(_MSC_VER) && _MSC_VER >= 1400
-	if (0 != fopen_s(&f, filename, mode))
-		f = 0;
-#else
-	f = fopen(filename, mode);
-#endif
-	return f;
-}
-
-STBIDEF stbi_uc* stbi_load(char const* filename, int* x, int* y, int* comp, int req_comp) {
-	FILE* f = stbi__fopen(filename, "rb");
-	unsigned char* result;
-	if (!f)
-		return stbi__errpuc("can't fopen", "Unable to open file");
-	result = stbi_load_from_file(f, x, y, comp, req_comp);
-	fclose(f);
-	return result;
-}
-
-STBIDEF stbi_uc* stbi_load_from_file(FILE* f, int* x, int* y, int* comp, int req_comp) {
-	unsigned char* result;
-	stbi__context s;
-	stbi__start_file(&s, f);
-	result = stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp);
-	if (result) {
-		// need to 'unget' all the characters in the IO buffer
-		fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR);
-	}
-	return result;
-}
-
-STBIDEF stbi__uint16* stbi_load_from_file_16(FILE* f, int* x, int* y, int* comp, int req_comp) {
-	stbi__uint16* result;
-	stbi__context s;
-	stbi__start_file(&s, f);
-	result = stbi__load_and_postprocess_16bit(&s, x, y, comp, req_comp);
-	if (result) {
-		// need to 'unget' all the characters in the IO buffer
-		fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR);
-	}
-	return result;
-}
-
-STBIDEF stbi_us* stbi_load_16(char const* filename, int* x, int* y, int* comp, int req_comp) {
-	FILE* f = stbi__fopen(filename, "rb");
-	stbi__uint16* result;
-	if (!f)
-		return (stbi_us*)stbi__errpuc("can't fopen", "Unable to open file");
-	result = stbi_load_from_file_16(f, x, y, comp, req_comp);
-	fclose(f);
-	return result;
-}
-
-#endif //! STBI_NO_STDIO
-
-STBIDEF stbi_us* stbi_load_16_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels) {
-	stbi__context s;
-	stbi__start_mem(&s, buffer, len);
-	return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels);
-}
-
-STBIDEF stbi_us* stbi_load_16_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels) {
-	stbi__context s;
-	stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
-	return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels);
-}
-
-STBIDEF stbi_uc* stbi_load_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp, int req_comp) {
-	stbi__context s;
-	stbi__start_mem(&s, buffer, len);
-	return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp);
-}
-
-STBIDEF stbi_uc* stbi_load_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp, int req_comp) {
-	stbi__context s;
-	stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
-	return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp);
-}
-
-#ifndef STBI_NO_GIF
-STBIDEF stbi_uc* stbi_load_gif_from_memory(stbi_uc const* buffer, int len, int** delays, int* x, int* y, int* z, int* comp, int req_comp) {
-	unsigned char* result;
-	stbi__context s;
-	stbi__start_mem(&s, buffer, len);
-
-	result = (unsigned char*)stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp);
-	if (stbi__vertically_flip_on_load) {
-		stbi__vertical_flip_slices(result, *x, *y, *z, *comp);
-	}
-
-	return result;
-}
-#endif
-
-#ifndef STBI_NO_LINEAR
-static float* stbi__loadf_main(stbi__context* s, int* x, int* y, int* comp, int req_comp) {
-	unsigned char* data;
-#ifndef STBI_NO_HDR
-	if (stbi__hdr_test(s)) {
-		stbi__result_info ri;
-		float* hdr_data = stbi__hdr_load(s, x, y, comp, req_comp, &ri);
-		if (hdr_data)
-			stbi__float_postprocess(hdr_data, x, y, comp, req_comp);
-		return hdr_data;
-	}
-#endif
-	data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp);
-	if (data)
-		return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
-	return stbi__errpf("unknown image type", "Image not of any known type, or corrupt");
-}
-
-STBIDEF float* stbi_loadf_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp, int req_comp) {
-	stbi__context s;
-	stbi__start_mem(&s, buffer, len);
-	return stbi__loadf_main(&s, x, y, comp, req_comp);
-}
-
-STBIDEF float* stbi_loadf_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp, int req_comp) {
-	stbi__context s;
-	stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
-	return stbi__loadf_main(&s, x, y, comp, req_comp);
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF float* stbi_loadf(char const* filename, int* x, int* y, int* comp, int req_comp) {
-	float* result;
-	FILE* f = stbi__fopen(filename, "rb");
-	if (!f)
-		return stbi__errpf("can't fopen", "Unable to open file");
-	result = stbi_loadf_from_file(f, x, y, comp, req_comp);
-	fclose(f);
-	return result;
-}
-
-STBIDEF float* stbi_loadf_from_file(FILE* f, int* x, int* y, int* comp, int req_comp) {
-	stbi__context s;
-	stbi__start_file(&s, f);
-	return stbi__loadf_main(&s, x, y, comp, req_comp);
-}
-#endif // !STBI_NO_STDIO
-
-#endif // !STBI_NO_LINEAR
-
-// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is
-// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always
-// reports false!
-
-STBIDEF int stbi_is_hdr_from_memory(stbi_uc const* buffer, int len) {
-#ifndef STBI_NO_HDR
-	stbi__context s;
-	stbi__start_mem(&s, buffer, len);
-	return stbi__hdr_test(&s);
-#else
-	STBI_NOTUSED(buffer);
-	STBI_NOTUSED(len);
-	return 0;
-#endif
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF int stbi_is_hdr(char const* filename) {
-	FILE* f = stbi__fopen(filename, "rb");
-	int result = 0;
-	if (f) {
-		result = stbi_is_hdr_from_file(f);
-		fclose(f);
-	}
-	return result;
-}
-
-STBIDEF int stbi_is_hdr_from_file(FILE* f) {
-#ifndef STBI_NO_HDR
-	long pos = ftell(f);
-	int res;
-	stbi__context s;
-	stbi__start_file(&s, f);
-	res = stbi__hdr_test(&s);
-	fseek(f, pos, SEEK_SET);
-	return res;
-#else
-	STBI_NOTUSED(f);
-	return 0;
-#endif
-}
-#endif // !STBI_NO_STDIO
-
-STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const* clbk, void* user) {
-#ifndef STBI_NO_HDR
-	stbi__context s;
-	stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
-	return stbi__hdr_test(&s);
-#else
-	STBI_NOTUSED(clbk);
-	STBI_NOTUSED(user);
-	return 0;
-#endif
-}
-
-#ifndef STBI_NO_LINEAR
-static float stbi__l2h_gamma = 2.2f, stbi__l2h_scale = 1.0f;
-
-STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
-STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
-#endif
-
-static float stbi__h2l_gamma_i = 1.0f / 2.2f, stbi__h2l_scale_i = 1.0f;
-
-STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1 / gamma; }
-STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1 / scale; }
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Common code used by all image loaders
-//
-
-enum { STBI__SCAN_load = 0, STBI__SCAN_type, STBI__SCAN_header };
-
-static void stbi__refill_buffer(stbi__context* s) {
-	int n = (s->io.read)(s->io_user_data, (char*)s->buffer_start, s->buflen);
-	if (n == 0) {
-		// at end of file, treat same as if from memory, but need to handle case
-		// where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file
-		s->read_from_callbacks = 0;
-		s->img_buffer = s->buffer_start;
-		s->img_buffer_end = s->buffer_start + 1;
-		*s->img_buffer = 0;
-	} else {
-		s->img_buffer = s->buffer_start;
-		s->img_buffer_end = s->buffer_start + n;
-	}
-}
-
-stbi_inline static stbi_uc stbi__get8(stbi__context* s) {
-	if (s->img_buffer < s->img_buffer_end)
-		return *s->img_buffer++;
-	if (s->read_from_callbacks) {
-		stbi__refill_buffer(s);
-		return *s->img_buffer++;
-	}
-	return 0;
-}
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
-// nothing
-#else
-stbi_inline static int stbi__at_eof(stbi__context* s) {
-	if (s->io.read) {
-		if (!(s->io.eof)(s->io_user_data))
-			return 0;
-		// if feof() is true, check if buffer = end
-		// special case: we've only got the special 0 character at the end
-		if (s->read_from_callbacks == 0)
-			return 1;
-	}
-
-	return s->img_buffer >= s->img_buffer_end;
-}
-#endif
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) &&           \
-	defined(STBI_NO_PIC)
-// nothing
-#else
-static void stbi__skip(stbi__context* s, int n) {
-	if (n < 0) {
-		s->img_buffer = s->img_buffer_end;
-		return;
-	}
-	if (s->io.read) {
-		int blen = (int)(s->img_buffer_end - s->img_buffer);
-		if (blen < n) {
-			s->img_buffer = s->img_buffer_end;
-			(s->io.skip)(s->io_user_data, n - blen);
-			return;
-		}
-	}
-	s->img_buffer += n;
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM)
-// nothing
-#else
-static int stbi__getn(stbi__context* s, stbi_uc* buffer, int n) {
-	if (s->io.read) {
-		int blen = (int)(s->img_buffer_end - s->img_buffer);
-		if (blen < n) {
-			int res, count;
-
-			memcpy(buffer, s->img_buffer, blen);
-
-			count = (s->io.read)(s->io_user_data, (char*)buffer + blen, n - blen);
-			res = (count == (n - blen));
-			s->img_buffer = s->img_buffer_end;
-			return res;
-		}
-	}
-
-	if (s->img_buffer + n <= s->img_buffer_end) {
-		memcpy(buffer, s->img_buffer, n);
-		s->img_buffer += n;
-		return 1;
-	} else
-		return 0;
-}
-#endif
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
-// nothing
-#else
-static int stbi__get16be(stbi__context* s) {
-	int z = stbi__get8(s);
-	return (z << 8) + stbi__get8(s);
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
-// nothing
-#else
-static stbi__uint32 stbi__get32be(stbi__context* s) {
-	stbi__uint32 z = stbi__get16be(s);
-	return (z << 16) + stbi__get16be(s);
-}
-#endif
-
-#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF)
-// nothing
-#else
-static int stbi__get16le(stbi__context* s) {
-	int z = stbi__get8(s);
-	return z + (stbi__get8(s) << 8);
-}
-#endif
-
-#ifndef STBI_NO_BMP
-static stbi__uint32 stbi__get32le(stbi__context* s) {
-	stbi__uint32 z = stbi__get16le(s);
-	return z + (stbi__get16le(s) << 16);
-}
-#endif
-
-#define STBI__BYTECAST(x) ((stbi_uc)((x)&255)) // truncate int to byte without warnings
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) &&           \
-	defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
-// nothing
-#else
-//////////////////////////////////////////////////////////////////////////////
-//
-//  generic converter from built-in img_n to req_comp
-//    individual types do this automatically as much as possible (e.g. jpeg
-//    does all cases internally since it needs to colorspace convert anyway,
-//    and it never has alpha, so very few cases ). png can automatically
-//    interleave an alpha=255 channel, but falls back to this for other cases
-//
-//  assume data buffer is malloced, so malloc a new one and free that one
-//  only failure mode is malloc failing
-
-static stbi_uc stbi__compute_y(int r, int g, int b) { return (stbi_uc)(((r * 77) + (g * 150) + (29 * b)) >> 8); }
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) &&            \
-	defined(STBI_NO_PNM)
-// nothing
-#else
-static unsigned char* stbi__convert_format(unsigned char* data, int img_n, int req_comp, unsigned int x, unsigned int y) {
-	int i, j;
-	unsigned char* good;
-
-	if (req_comp == img_n)
-		return data;
-	STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
-
-	good = (unsigned char*)stbi__malloc_mad3(req_comp, x, y, 0);
-	if (good == NULL) {
-		STBI_FREE(data);
-		return stbi__errpuc("outofmem", "Out of memory");
-	}
-
-	for (j = 0; j < (int)y; ++j) {
-		unsigned char* src = data + j * x * img_n;
-		unsigned char* dest = good + j * x * req_comp;
-
-#define STBI__COMBO(a, b) ((a)*8 + (b))
-#define STBI__CASE(a, b)                                                                                                                                       \
-	case STBI__COMBO(a, b):                                                                                                                                    \
-		for (i = x - 1; i >= 0; --i, src += a, dest += b)
-		// convert source image with img_n components to one with req_comp
-		// components; avoid switch per pixel, so use switch per scanline and
-		// massive macros
-		switch (STBI__COMBO(img_n, req_comp)) {
-			STBI__CASE(1, 2) {
-				dest[0] = src[0];
-				dest[1] = 255;
-			}
-			break;
-			STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
-			break;
-			STBI__CASE(1, 4) {
-				dest[0] = dest[1] = dest[2] = src[0];
-				dest[3] = 255;
-			}
-			break;
-			STBI__CASE(2, 1) { dest[0] = src[0]; }
-			break;
-			STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
-			break;
-			STBI__CASE(2, 4) {
-				dest[0] = dest[1] = dest[2] = src[0];
-				dest[3] = src[1];
-			}
-			break;
-			STBI__CASE(3, 4) {
-				dest[0] = src[0];
-				dest[1] = src[1];
-				dest[2] = src[2];
-				dest[3] = 255;
-			}
-			break;
-			STBI__CASE(3, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); }
-			break;
-			STBI__CASE(3, 2) {
-				dest[0] = stbi__compute_y(src[0], src[1], src[2]);
-				dest[1] = 255;
-			}
-			break;
-			STBI__CASE(4, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); }
-			break;
-			STBI__CASE(4, 2) {
-				dest[0] = stbi__compute_y(src[0], src[1], src[2]);
-				dest[1] = src[3];
-			}
-			break;
-			STBI__CASE(4, 3) {
-				dest[0] = src[0];
-				dest[1] = src[1];
-				dest[2] = src[2];
-			}
-			break;
-		default:
-			STBI_ASSERT(0);
-		}
-#undef STBI__CASE
-	}
-
-	STBI_FREE(data);
-	return good;
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
-// nothing
-#else
-static stbi__uint16 stbi__compute_y_16(int r, int g, int b) { return (stbi__uint16)(((r * 77) + (g * 150) + (29 * b)) >> 8); }
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
-// nothing
-#else
-static stbi__uint16* stbi__convert_format16(stbi__uint16* data, int img_n, int req_comp, unsigned int x, unsigned int y) {
-	int i, j;
-	stbi__uint16* good;
-
-	if (req_comp == img_n)
-		return data;
-	STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
-
-	good = (stbi__uint16*)stbi__malloc(req_comp * x * y * 2);
-	if (good == NULL) {
-		STBI_FREE(data);
-		return (stbi__uint16*)stbi__errpuc("outofmem", "Out of memory");
-	}
-
-	for (j = 0; j < (int)y; ++j) {
-		stbi__uint16* src = data + j * x * img_n;
-		stbi__uint16* dest = good + j * x * req_comp;
-
-#define STBI__COMBO(a, b) ((a)*8 + (b))
-#define STBI__CASE(a, b)                                                                                                                                       \
-	case STBI__COMBO(a, b):                                                                                                                                    \
-		for (i = x - 1; i >= 0; --i, src += a, dest += b)
-		// convert source image with img_n components to one with req_comp
-		// components; avoid switch per pixel, so use switch per scanline and
-		// massive macros
-		switch (STBI__COMBO(img_n, req_comp)) {
-			STBI__CASE(1, 2) {
-				dest[0] = src[0];
-				dest[1] = 0xffff;
-			}
-			break;
-			STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
-			break;
-			STBI__CASE(1, 4) {
-				dest[0] = dest[1] = dest[2] = src[0];
-				dest[3] = 0xffff;
-			}
-			break;
-			STBI__CASE(2, 1) { dest[0] = src[0]; }
-			break;
-			STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
-			break;
-			STBI__CASE(2, 4) {
-				dest[0] = dest[1] = dest[2] = src[0];
-				dest[3] = src[1];
-			}
-			break;
-			STBI__CASE(3, 4) {
-				dest[0] = src[0];
-				dest[1] = src[1];
-				dest[2] = src[2];
-				dest[3] = 0xffff;
-			}
-			break;
-			STBI__CASE(3, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); }
-			break;
-			STBI__CASE(3, 2) {
-				dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
-				dest[1] = 0xffff;
-			}
-			break;
-			STBI__CASE(4, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); }
-			break;
-			STBI__CASE(4, 2) {
-				dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
-				dest[1] = src[3];
-			}
-			break;
-			STBI__CASE(4, 3) {
-				dest[0] = src[0];
-				dest[1] = src[1];
-				dest[2] = src[2];
-			}
-			break;
-		default:
-			STBI_ASSERT(0);
-		}
-#undef STBI__CASE
-	}
-
-	STBI_FREE(data);
-	return good;
-}
-#endif
-
-#ifndef STBI_NO_LINEAR
-static float* stbi__ldr_to_hdr(stbi_uc* data, int x, int y, int comp) {
-	int i, k, n;
-	float* output;
-	if (!data)
-		return NULL;
-	output = (float*)stbi__malloc_mad4(x, y, comp, sizeof(float), 0);
-	if (output == NULL) {
-		STBI_FREE(data);
-		return stbi__errpf("outofmem", "Out of memory");
-	}
-	// compute number of non-alpha components
-	if (comp & 1)
-		n = comp;
-	else
-		n = comp - 1;
-	for (i = 0; i < x * y; ++i) {
-		for (k = 0; k < n; ++k) {
-			output[i * comp + k] = (float)(pow(data[i * comp + k] / 255.0f, stbi__l2h_gamma) * stbi__l2h_scale);
-		}
-	}
-	if (n < comp) {
-		for (i = 0; i < x * y; ++i) {
-			output[i * comp + n] = data[i * comp + n] / 255.0f;
-		}
-	}
-	STBI_FREE(data);
-	return output;
-}
-#endif
-
-#ifndef STBI_NO_HDR
-#define stbi__float2int(x) ((int)(x))
-static stbi_uc* stbi__hdr_to_ldr(float* data, int x, int y, int comp) {
-	int i, k, n;
-	stbi_uc* output;
-	if (!data)
-		return NULL;
-	output = (stbi_uc*)stbi__malloc_mad3(x, y, comp, 0);
-	if (output == NULL) {
-		STBI_FREE(data);
-		return stbi__errpuc("outofmem", "Out of memory");
-	}
-	// compute number of non-alpha components
-	if (comp & 1)
-		n = comp;
-	else
-		n = comp - 1;
-	for (i = 0; i < x * y; ++i) {
-		for (k = 0; k < n; ++k) {
-			float z = (float)pow(data[i * comp + k] * stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f;
-			if (z < 0)
-				z = 0;
-			if (z > 255)
-				z = 255;
-			output[i * comp + k] = (stbi_uc)stbi__float2int(z);
-		}
-		if (k < comp) {
-			float z = data[i * comp + k] * 255 + 0.5f;
-			if (z < 0)
-				z = 0;
-			if (z > 255)
-				z = 255;
-			output[i * comp + k] = (stbi_uc)stbi__float2int(z);
-		}
-	}
-	STBI_FREE(data);
-	return output;
-}
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-//  "baseline" JPEG/JFIF decoder
-//
-//    simple implementation
-//      - doesn't support delayed output of y-dimension
-//      - simple interface (only one output format: 8-bit interleaved RGB)
-//      - doesn't try to recover corrupt jpegs
-//      - doesn't allow partial loading, loading multiple at once
-//      - still fast on x86 (copying globals into locals doesn't help x86)
-//      - allocates lots of intermediate memory (full size of all components)
-//        - non-interleaved case requires this anyway
-//        - allows good upsampling (see next)
-//    high-quality
-//      - upsampled channels are bilinearly interpolated, even across blocks
-//      - quality integer IDCT derived from IJG's 'slow'
-//    performance
-//      - fast huffman; reasonable integer IDCT
-//      - some SIMD kernels for common paths on targets with SSE2/NEON
-//      - uses a lot of intermediate memory, could cache poorly
-
-#ifndef STBI_NO_JPEG
-
-// huffman decoding acceleration
-#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache
-
-typedef struct {
-	stbi_uc fast[1 << FAST_BITS];
-	// weirdly, repacking this into AoS is a 10% speed loss, instead of a win
-	stbi__uint16 code[256];
-	stbi_uc values[256];
-	stbi_uc size[257];
-	unsigned int maxcode[18];
-	int delta[17]; // old 'firstsymbol' - old 'firstcode'
-} stbi__huffman;
-
-typedef struct {
-	stbi__context* s;
-	stbi__huffman huff_dc[4];
-	stbi__huffman huff_ac[4];
-	stbi__uint16 dequant[4][64];
-	stbi__int16 fast_ac[4][1 << FAST_BITS];
-
-	// sizes for components, interleaved MCUs
-	int img_h_max, img_v_max;
-	int img_mcu_x, img_mcu_y;
-	int img_mcu_w, img_mcu_h;
-
-	// definition of jpeg image component
-	struct {
-		int id;
-		int h, v;
-		int tq;
-		int hd, ha;
-		int dc_pred;
-
-		int x, y, w2, h2;
-		stbi_uc* data;
-		void *raw_data, *raw_coeff;
-		stbi_uc* linebuf;
-		short* coeff;		  // progressive only
-		int coeff_w, coeff_h; // number of 8x8 coefficient blocks
-	} img_comp[4];
-
-	stbi__uint32 code_buffer; // jpeg entropy-coded buffer
-	int code_bits;			  // number of valid bits
-	unsigned char marker;	 // marker seen while filling entropy buffer
-	int nomore;				  // flag if we saw a marker so must stop
-
-	int progressive;
-	int spec_start;
-	int spec_end;
-	int succ_high;
-	int succ_low;
-	int eob_run;
-	int jfif;
-	int app14_color_transform; // Adobe APP14 tag
-	int rgb;
-
-	int scan_n, order[4];
-	int restart_interval, todo;
-
-	// kernels
-	void (*idct_block_kernel)(stbi_uc* out, int out_stride, short data[64]);
-	void (*YCbCr_to_RGB_kernel)(stbi_uc* out, const stbi_uc* y, const stbi_uc* pcb, const stbi_uc* pcr, int count, int step);
-	stbi_uc* (*resample_row_hv_2_kernel)(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs);
-} stbi__jpeg;
-
-static int stbi__build_huffman(stbi__huffman* h, int* count) {
-	int i, j, k = 0;
-	unsigned int code;
-	// build size list for each symbol (from JPEG spec)
-	for (i = 0; i < 16; ++i)
-		for (j = 0; j < count[i]; ++j)
-			h->size[k++] = (stbi_uc)(i + 1);
-	h->size[k] = 0;
-
-	// compute actual symbols (from jpeg spec)
-	code = 0;
-	k = 0;
-	for (j = 1; j <= 16; ++j) {
-		// compute delta to add to code to compute symbol id
-		h->delta[j] = k - code;
-		if (h->size[k] == j) {
-			while (h->size[k] == j)
-				h->code[k++] = (stbi__uint16)(code++);
-			if (code - 1 >= (1u << j))
-				return stbi__err("bad code lengths", "Corrupt JPEG");
-		}
-		// compute largest code + 1 for this size, preshifted as needed later
-		h->maxcode[j] = code << (16 - j);
-		code <<= 1;
-	}
-	h->maxcode[j] = 0xffffffff;
-
-	// build non-spec acceleration table; 255 is flag for not-accelerated
-	memset(h->fast, 255, 1 << FAST_BITS);
-	for (i = 0; i < k; ++i) {
-		int s = h->size[i];
-		if (s <= FAST_BITS) {
-			int c = h->code[i] << (FAST_BITS - s);
-			int m = 1 << (FAST_BITS - s);
-			for (j = 0; j < m; ++j) {
-				h->fast[c + j] = (stbi_uc)i;
-			}
-		}
-	}
-	return 1;
-}
-
-// build a table that decodes both magnitude and value of small ACs in
-// one go.
-static void stbi__build_fast_ac(stbi__int16* fast_ac, stbi__huffman* h) {
-	int i;
-	for (i = 0; i < (1 << FAST_BITS); ++i) {
-		stbi_uc fast = h->fast[i];
-		fast_ac[i] = 0;
-		if (fast < 255) {
-			int rs = h->values[fast];
-			int run = (rs >> 4) & 15;
-			int magbits = rs & 15;
-			int len = h->size[fast];
-
-			if (magbits && len + magbits <= FAST_BITS) {
-				// magnitude code followed by receive_extend code
-				int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits);
-				int m = 1 << (magbits - 1);
-				if (k < m)
-					k += (~0U << magbits) + 1;
-				// if the result is small enough, we can fit it in fast_ac table
-				if (k >= -128 && k <= 127)
-					fast_ac[i] = (stbi__int16)((k * 256) + (run * 16) + (len + magbits));
-			}
-		}
-	}
-}
-
-static void stbi__grow_buffer_unsafe(stbi__jpeg* j) {
-	do {
-		unsigned int b = j->nomore ? 0 : stbi__get8(j->s);
-		if (b == 0xff) {
-			int c = stbi__get8(j->s);
-			while (c == 0xff)
-				c = stbi__get8(j->s); // consume fill bytes
-			if (c != 0) {
-				j->marker = (unsigned char)c;
-				j->nomore = 1;
-				return;
-			}
-		}
-		j->code_buffer |= b << (24 - j->code_bits);
-		j->code_bits += 8;
-	} while (j->code_bits <= 24);
-}
-
-// (1 << n) - 1
-static const stbi__uint32 stbi__bmask[17] = {0, 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535};
-
-// decode a jpeg huffman value from the bitstream
-stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg* j, stbi__huffman* h) {
-	unsigned int temp;
-	int c, k;
-
-	if (j->code_bits < 16)
-		stbi__grow_buffer_unsafe(j);
-
-	// look at the top FAST_BITS and determine what symbol ID it is,
-	// if the code is <= FAST_BITS
-	c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1);
-	k = h->fast[c];
-	if (k < 255) {
-		int s = h->size[k];
-		if (s > j->code_bits)
-			return -1;
-		j->code_buffer <<= s;
-		j->code_bits -= s;
-		return h->values[k];
-	}
-
-	// naive test is to shift the code_buffer down so k bits are
-	// valid, then test against maxcode. To speed this up, we've
-	// preshifted maxcode left so that it has (16-k) 0s at the
-	// end; in other words, regardless of the number of bits, it
-	// wants to be compared against something shifted to have 16;
-	// that way we don't need to shift inside the loop.
-	temp = j->code_buffer >> 16;
-	for (k = FAST_BITS + 1;; ++k)
-		if (temp < h->maxcode[k])
-			break;
-	if (k == 17) {
-		// error! code not found
-		j->code_bits -= 16;
-		return -1;
-	}
-
-	if (k > j->code_bits)
-		return -1;
-
-	// convert the huffman code to the symbol id
-	c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
-	STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
-
-	// convert the id to a symbol
-	j->code_bits -= k;
-	j->code_buffer <<= k;
-	return h->values[c];
-}
-
-// bias[n] = (-1<<n) + 1
-static const int stbi__jbias[16] = {0, -1, -3, -7, -15, -31, -63, -127, -255, -511, -1023, -2047, -4095, -8191, -16383, -32767};
-
-// combined JPEG 'receive' and JPEG 'extend', since baseline
-// always extends everything it receives.
-stbi_inline static int stbi__extend_receive(stbi__jpeg* j, int n) {
-	unsigned int k;
-	int sgn;
-	if (j->code_bits < n)
-		stbi__grow_buffer_unsafe(j);
-
-	sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB
-	k = stbi_lrot(j->code_buffer, n);
-	STBI_ASSERT(n >= 0 && n < (int)(sizeof(stbi__bmask) / sizeof(*stbi__bmask)));
-	j->code_buffer = k & ~stbi__bmask[n];
-	k &= stbi__bmask[n];
-	j->code_bits -= n;
-	return k + (stbi__jbias[n] & ~sgn);
-}
-
-// get some unsigned bits
-stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg* j, int n) {
-	unsigned int k;
-	if (j->code_bits < n)
-		stbi__grow_buffer_unsafe(j);
-	k = stbi_lrot(j->code_buffer, n);
-	j->code_buffer = k & ~stbi__bmask[n];
-	k &= stbi__bmask[n];
-	j->code_bits -= n;
-	return k;
-}
-
-stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg* j) {
-	unsigned int k;
-	if (j->code_bits < 1)
-		stbi__grow_buffer_unsafe(j);
-	k = j->code_buffer;
-	j->code_buffer <<= 1;
-	--j->code_bits;
-	return k & 0x80000000;
-}
-
-// given a value that's at position X in the zigzag stream,
-// where does it appear in the 8x8 matrix coded as row-major?
-static const stbi_uc stbi__jpeg_dezigzag[64 + 15] = {0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5, 12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7,
-													 14, 21, 28, 35, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51, 58, 59, 52, 45, 38, 31, 39, 46,
-													 53, 60, 61, 54, 47, 55, 62, 63,
-													 // let corrupt input sample past end
-													 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63};
-
-// decode one 64-entry block--
-static int stbi__jpeg_decode_block(stbi__jpeg* j, short data[64], stbi__huffman* hdc, stbi__huffman* hac, stbi__int16* fac, int b, stbi__uint16* dequant) {
-	int diff, dc, k;
-	int t;
-
-	if (j->code_bits < 16)
-		stbi__grow_buffer_unsafe(j);
-	t = stbi__jpeg_huff_decode(j, hdc);
-	if (t < 0)
-		return stbi__err("bad huffman code", "Corrupt JPEG");
-
-	// 0 all the ac values now so we can do it 32-bits at a time
-	memset(data, 0, 64 * sizeof(data[0]));
-
-	diff = t ? stbi__extend_receive(j, t) : 0;
-	dc = j->img_comp[b].dc_pred + diff;
-	j->img_comp[b].dc_pred = dc;
-	data[0] = (short)(dc * dequant[0]);
-
-	// decode AC components, see JPEG spec
-	k = 1;
-	do {
-		unsigned int zig;
-		int c, r, s;
-		if (j->code_bits < 16)
-			stbi__grow_buffer_unsafe(j);
-		c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1);
-		r = fac[c];
-		if (r) {				// fast-AC path
-			k += (r >> 4) & 15; // run
-			s = r & 15;			// combined length
-			j->code_buffer <<= s;
-			j->code_bits -= s;
-			// decode into unzigzag'd location
-			zig = stbi__jpeg_dezigzag[k++];
-			data[zig] = (short)((r >> 8) * dequant[zig]);
-		} else {
-			int rs = stbi__jpeg_huff_decode(j, hac);
-			if (rs < 0)
-				return stbi__err("bad huffman code", "Corrupt JPEG");
-			s = rs & 15;
-			r = rs >> 4;
-			if (s == 0) {
-				if (rs != 0xf0)
-					break; // end block
-				k += 16;
-			} else {
-				k += r;
-				// decode into unzigzag'd location
-				zig = stbi__jpeg_dezigzag[k++];
-				data[zig] = (short)(stbi__extend_receive(j, s) * dequant[zig]);
-			}
-		}
-	} while (k < 64);
-	return 1;
-}
-
-static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg* j, short data[64], stbi__huffman* hdc, int b) {
-	int diff, dc;
-	int t;
-	if (j->spec_end != 0)
-		return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-
-	if (j->code_bits < 16)
-		stbi__grow_buffer_unsafe(j);
-
-	if (j->succ_high == 0) {
-		// first scan for DC coefficient, must be first
-		memset(data, 0, 64 * sizeof(data[0])); // 0 all the ac values now
-		t = stbi__jpeg_huff_decode(j, hdc);
-		diff = t ? stbi__extend_receive(j, t) : 0;
-
-		dc = j->img_comp[b].dc_pred + diff;
-		j->img_comp[b].dc_pred = dc;
-		data[0] = (short)(dc << j->succ_low);
-	} else {
-		// refinement scan for DC coefficient
-		if (stbi__jpeg_get_bit(j))
-			data[0] += (short)(1 << j->succ_low);
-	}
-	return 1;
-}
-
-// @OPTIMIZE: store non-zigzagged during the decode passes,
-// and only de-zigzag when dequantizing
-static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg* j, short data[64], stbi__huffman* hac, stbi__int16* fac) {
-	int k;
-	if (j->spec_start == 0)
-		return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-
-	if (j->succ_high == 0) {
-		int shift = j->succ_low;
-
-		if (j->eob_run) {
-			--j->eob_run;
-			return 1;
-		}
-
-		k = j->spec_start;
-		do {
-			unsigned int zig;
-			int c, r, s;
-			if (j->code_bits < 16)
-				stbi__grow_buffer_unsafe(j);
-			c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1);
-			r = fac[c];
-			if (r) {				// fast-AC path
-				k += (r >> 4) & 15; // run
-				s = r & 15;			// combined length
-				j->code_buffer <<= s;
-				j->code_bits -= s;
-				zig = stbi__jpeg_dezigzag[k++];
-				data[zig] = (short)((r >> 8) << shift);
-			} else {
-				int rs = stbi__jpeg_huff_decode(j, hac);
-				if (rs < 0)
-					return stbi__err("bad huffman code", "Corrupt JPEG");
-				s = rs & 15;
-				r = rs >> 4;
-				if (s == 0) {
-					if (r < 15) {
-						j->eob_run = (1 << r);
-						if (r)
-							j->eob_run += stbi__jpeg_get_bits(j, r);
-						--j->eob_run;
-						break;
-					}
-					k += 16;
-				} else {
-					k += r;
-					zig = stbi__jpeg_dezigzag[k++];
-					data[zig] = (short)(stbi__extend_receive(j, s) << shift);
-				}
-			}
-		} while (k <= j->spec_end);
-	} else {
-		// refinement scan for these AC coefficients
-
-		short bit = (short)(1 << j->succ_low);
-
-		if (j->eob_run) {
-			--j->eob_run;
-			for (k = j->spec_start; k <= j->spec_end; ++k) {
-				short* p = &data[stbi__jpeg_dezigzag[k]];
-				if (*p != 0)
-					if (stbi__jpeg_get_bit(j))
-						if ((*p & bit) == 0) {
-							if (*p > 0)
-								*p += bit;
-							else
-								*p -= bit;
-						}
-			}
-		} else {
-			k = j->spec_start;
-			do {
-				int r, s;
-				int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here,
-														 // advance-by-r is so slow, eh
-				if (rs < 0)
-					return stbi__err("bad huffman code", "Corrupt JPEG");
-				s = rs & 15;
-				r = rs >> 4;
-				if (s == 0) {
-					if (r < 15) {
-						j->eob_run = (1 << r) - 1;
-						if (r)
-							j->eob_run += stbi__jpeg_get_bits(j, r);
-						r = 64; // force end of block
-					} else {
-						// r=15 s=0 should write 16 0s, so we just do
-						// a run of 15 0s and then write s (which is 0),
-						// so we don't have to do anything special here
-					}
-				} else {
-					if (s != 1)
-						return stbi__err("bad huffman code", "Corrupt JPEG");
-					// sign bit
-					if (stbi__jpeg_get_bit(j))
-						s = bit;
-					else
-						s = -bit;
-				}
-
-				// advance by r
-				while (k <= j->spec_end) {
-					short* p = &data[stbi__jpeg_dezigzag[k++]];
-					if (*p != 0) {
-						if (stbi__jpeg_get_bit(j))
-							if ((*p & bit) == 0) {
-								if (*p > 0)
-									*p += bit;
-								else
-									*p -= bit;
-							}
-					} else {
-						if (r == 0) {
-							*p = (short)s;
-							break;
-						}
-						--r;
-					}
-				}
-			} while (k <= j->spec_end);
-		}
-	}
-	return 1;
-}
-
-// take a -128..127 value and stbi__clamp it and convert to 0..255
-stbi_inline static stbi_uc stbi__clamp(int x) {
-	// trick to use a single test to catch both cases
-	if ((unsigned int)x > 255) {
-		if (x < 0)
-			return 0;
-		if (x > 255)
-			return 255;
-	}
-	return (stbi_uc)x;
-}
-
-#define stbi__f2f(x) ((int)(((x)*4096 + 0.5)))
-#define stbi__fsh(x) ((x)*4096)
-
-// derived from jidctint -- DCT_ISLOW
-#define STBI__IDCT_1D(s0, s1, s2, s3, s4, s5, s6, s7)                                                                                                          \
-	int t0, t1, t2, t3, p1, p2, p3, p4, p5, x0, x1, x2, x3;                                                                                                    \
-	p2 = s2;                                                                                                                                                   \
-	p3 = s6;                                                                                                                                                   \
-	p1 = (p2 + p3) * stbi__f2f(0.5411961f);                                                                                                                    \
-	t2 = p1 + p3 * stbi__f2f(-1.847759065f);                                                                                                                   \
-	t3 = p1 + p2 * stbi__f2f(0.765366865f);                                                                                                                    \
-	p2 = s0;                                                                                                                                                   \
-	p3 = s4;                                                                                                                                                   \
-	t0 = stbi__fsh(p2 + p3);                                                                                                                                   \
-	t1 = stbi__fsh(p2 - p3);                                                                                                                                   \
-	x0 = t0 + t3;                                                                                                                                              \
-	x3 = t0 - t3;                                                                                                                                              \
-	x1 = t1 + t2;                                                                                                                                              \
-	x2 = t1 - t2;                                                                                                                                              \
-	t0 = s7;                                                                                                                                                   \
-	t1 = s5;                                                                                                                                                   \
-	t2 = s3;                                                                                                                                                   \
-	t3 = s1;                                                                                                                                                   \
-	p3 = t0 + t2;                                                                                                                                              \
-	p4 = t1 + t3;                                                                                                                                              \
-	p1 = t0 + t3;                                                                                                                                              \
-	p2 = t1 + t2;                                                                                                                                              \
-	p5 = (p3 + p4) * stbi__f2f(1.175875602f);                                                                                                                  \
-	t0 = t0 * stbi__f2f(0.298631336f);                                                                                                                         \
-	t1 = t1 * stbi__f2f(2.053119869f);                                                                                                                         \
-	t2 = t2 * stbi__f2f(3.072711026f);                                                                                                                         \
-	t3 = t3 * stbi__f2f(1.501321110f);                                                                                                                         \
-	p1 = p5 + p1 * stbi__f2f(-0.899976223f);                                                                                                                   \
-	p2 = p5 + p2 * stbi__f2f(-2.562915447f);                                                                                                                   \
-	p3 = p3 * stbi__f2f(-1.961570560f);                                                                                                                        \
-	p4 = p4 * stbi__f2f(-0.390180644f);                                                                                                                        \
-	t3 += p1 + p4;                                                                                                                                             \
-	t2 += p2 + p3;                                                                                                                                             \
-	t1 += p2 + p4;                                                                                                                                             \
-	t0 += p1 + p3;
-
-static void stbi__idct_block(stbi_uc* out, int out_stride, short data[64]) {
-	int i, val[64], *v = val;
-	stbi_uc* o;
-	short* d = data;
-
-	// columns
-	for (i = 0; i < 8; ++i, ++d, ++v) {
-		// if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
-		if (d[8] == 0 && d[16] == 0 && d[24] == 0 && d[32] == 0 && d[40] == 0 && d[48] == 0 && d[56] == 0) {
-			//    no shortcut                 0     seconds
-			//    (1|2|3|4|5|6|7)==0          0     seconds
-			//    all separate               -0.047 seconds
-			//    1 && 2|3 && 4|5 && 6|7:    -0.047 seconds
-			int dcterm = d[0] * 4;
-			v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm;
-		} else {
-			STBI__IDCT_1D(d[0], d[8], d[16], d[24], d[32], d[40], d[48], d[56])
-			// constants scaled things up by 1<<12; let's bring them back
-			// down, but keep 2 extra bits of precision
-			x0 += 512;
-			x1 += 512;
-			x2 += 512;
-			x3 += 512;
-			v[0] = (x0 + t3) >> 10;
-			v[56] = (x0 - t3) >> 10;
-			v[8] = (x1 + t2) >> 10;
-			v[48] = (x1 - t2) >> 10;
-			v[16] = (x2 + t1) >> 10;
-			v[40] = (x2 - t1) >> 10;
-			v[24] = (x3 + t0) >> 10;
-			v[32] = (x3 - t0) >> 10;
-		}
-	}
-
-	for (i = 0, v = val, o = out; i < 8; ++i, v += 8, o += out_stride) {
-		// no fast case since the first 1D IDCT spread components out
-		STBI__IDCT_1D(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7])
-		// constants scaled things up by 1<<12, plus we had 1<<2 from first
-		// loop, plus horizontal and vertical each scale by sqrt(8) so together
-		// we've got an extra 1<<3, so 1<<17 total we need to remove.
-		// so we want to round that, which means adding 0.5 * 1<<17,
-		// aka 65536. Also, we'll end up with -128 to 127 that we want
-		// to encode as 0..255 by adding 128, so we'll add that before the shift
-		x0 += 65536 + (128 << 17);
-		x1 += 65536 + (128 << 17);
-		x2 += 65536 + (128 << 17);
-		x3 += 65536 + (128 << 17);
-		// tried computing the shifts into temps, or'ing the temps to see
-		// if any were out of range, but that was slower
-		o[0] = stbi__clamp((x0 + t3) >> 17);
-		o[7] = stbi__clamp((x0 - t3) >> 17);
-		o[1] = stbi__clamp((x1 + t2) >> 17);
-		o[6] = stbi__clamp((x1 - t2) >> 17);
-		o[2] = stbi__clamp((x2 + t1) >> 17);
-		o[5] = stbi__clamp((x2 - t1) >> 17);
-		o[3] = stbi__clamp((x3 + t0) >> 17);
-		o[4] = stbi__clamp((x3 - t0) >> 17);
-	}
-}
-
-#ifdef STBI_SSE2
-// sse2 integer IDCT. not the fastest possible implementation but it
-// produces bit-identical results to the generic C version so it's
-// fully "transparent".
-static void stbi__idct_simd(stbi_uc* out, int out_stride, short data[64]) {
-	// This is constructed to match our regular (generic) integer IDCT exactly.
-	__m128i row0, row1, row2, row3, row4, row5, row6, row7;
-	__m128i tmp;
-
-// dot product constant: even elems=x, odd elems=y
-#define dct_const(x, y) _mm_setr_epi16((x), (y), (x), (y), (x), (y), (x), (y))
-
-// out(0) = c0[even]*x + c0[odd]*y   (c0, x, y 16-bit, out 32-bit)
-// out(1) = c1[even]*x + c1[odd]*y
-#define dct_rot(out0, out1, x, y, c0, c1)                                                                                                                      \
-	__m128i c0##lo = _mm_unpacklo_epi16((x), (y));                                                                                                             \
-	__m128i c0##hi = _mm_unpackhi_epi16((x), (y));                                                                                                             \
-	__m128i out0##_l = _mm_madd_epi16(c0##lo, c0);                                                                                                             \
-	__m128i out0##_h = _mm_madd_epi16(c0##hi, c0);                                                                                                             \
-	__m128i out1##_l = _mm_madd_epi16(c0##lo, c1);                                                                                                             \
-	__m128i out1##_h = _mm_madd_epi16(c0##hi, c1)
-
-// out = in << 12  (in 16-bit, out 32-bit)
-#define dct_widen(out, in)                                                                                                                                     \
-	__m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4);                                                                        \
-	__m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4)
-
-// wide add
-#define dct_wadd(out, a, b)                                                                                                                                    \
-	__m128i out##_l = _mm_add_epi32(a##_l, b##_l);                                                                                                             \
-	__m128i out##_h = _mm_add_epi32(a##_h, b##_h)
-
-// wide sub
-#define dct_wsub(out, a, b)                                                                                                                                    \
-	__m128i out##_l = _mm_sub_epi32(a##_l, b##_l);                                                                                                             \
-	__m128i out##_h = _mm_sub_epi32(a##_h, b##_h)
-
-// butterfly a/b, add bias, then shift by "s" and pack
-#define dct_bfly32o(out0, out1, a, b, bias, s)                                                                                                                 \
-	{                                                                                                                                                          \
-		__m128i abiased_l = _mm_add_epi32(a##_l, bias);                                                                                                        \
-		__m128i abiased_h = _mm_add_epi32(a##_h, bias);                                                                                                        \
-		dct_wadd(sum, abiased, b);                                                                                                                             \
-		dct_wsub(dif, abiased, b);                                                                                                                             \
-		out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s));                                                                            \
-		out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s));                                                                            \
-	}
-
-// 8-bit interleave step (for transposes)
-#define dct_interleave8(a, b)                                                                                                                                  \
-	tmp = a;                                                                                                                                                   \
-	a = _mm_unpacklo_epi8(a, b);                                                                                                                               \
-	b = _mm_unpackhi_epi8(tmp, b)
-
-// 16-bit interleave step (for transposes)
-#define dct_interleave16(a, b)                                                                                                                                 \
-	tmp = a;                                                                                                                                                   \
-	a = _mm_unpacklo_epi16(a, b);                                                                                                                              \
-	b = _mm_unpackhi_epi16(tmp, b)
-
-#define dct_pass(bias, shift)                                                                                                                                  \
-	{                                                                                                                                                          \
-		/* even part */                                                                                                                                        \
-		dct_rot(t2e, t3e, row2, row6, rot0_0, rot0_1);                                                                                                         \
-		__m128i sum04 = _mm_add_epi16(row0, row4);                                                                                                             \
-		__m128i dif04 = _mm_sub_epi16(row0, row4);                                                                                                             \
-		dct_widen(t0e, sum04);                                                                                                                                 \
-		dct_widen(t1e, dif04);                                                                                                                                 \
-		dct_wadd(x0, t0e, t3e);                                                                                                                                \
-		dct_wsub(x3, t0e, t3e);                                                                                                                                \
-		dct_wadd(x1, t1e, t2e);                                                                                                                                \
-		dct_wsub(x2, t1e, t2e);                                                                                                                                \
-		/* odd part */                                                                                                                                         \
-		dct_rot(y0o, y2o, row7, row3, rot2_0, rot2_1);                                                                                                         \
-		dct_rot(y1o, y3o, row5, row1, rot3_0, rot3_1);                                                                                                         \
-		__m128i sum17 = _mm_add_epi16(row1, row7);                                                                                                             \
-		__m128i sum35 = _mm_add_epi16(row3, row5);                                                                                                             \
-		dct_rot(y4o, y5o, sum17, sum35, rot1_0, rot1_1);                                                                                                       \
-		dct_wadd(x4, y0o, y4o);                                                                                                                                \
-		dct_wadd(x5, y1o, y5o);                                                                                                                                \
-		dct_wadd(x6, y2o, y5o);                                                                                                                                \
-		dct_wadd(x7, y3o, y4o);                                                                                                                                \
-		dct_bfly32o(row0, row7, x0, x7, bias, shift);                                                                                                          \
-		dct_bfly32o(row1, row6, x1, x6, bias, shift);                                                                                                          \
-		dct_bfly32o(row2, row5, x2, x5, bias, shift);                                                                                                          \
-		dct_bfly32o(row3, row4, x3, x4, bias, shift);                                                                                                          \
-	}
-
-	__m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f));
-	__m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f(0.765366865f), stbi__f2f(0.5411961f));
-	__m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f));
-	__m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f));
-	__m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f(0.298631336f), stbi__f2f(-1.961570560f));
-	__m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f(3.072711026f));
-	__m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f(2.053119869f), stbi__f2f(-0.390180644f));
-	__m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f(1.501321110f));
-
-	// rounding biases in column/row passes, see stbi__idct_block for
-	// explanation.
-	__m128i bias_0 = _mm_set1_epi32(512);
-	__m128i bias_1 = _mm_set1_epi32(65536 + (128 << 17));
-
-	// load
-	row0 = _mm_load_si128((const __m128i*)(data + 0 * 8));
-	row1 = _mm_load_si128((const __m128i*)(data + 1 * 8));
-	row2 = _mm_load_si128((const __m128i*)(data + 2 * 8));
-	row3 = _mm_load_si128((const __m128i*)(data + 3 * 8));
-	row4 = _mm_load_si128((const __m128i*)(data + 4 * 8));
-	row5 = _mm_load_si128((const __m128i*)(data + 5 * 8));
-	row6 = _mm_load_si128((const __m128i*)(data + 6 * 8));
-	row7 = _mm_load_si128((const __m128i*)(data + 7 * 8));
-
-	// column pass
-	dct_pass(bias_0, 10);
-
-	{
-		// 16bit 8x8 transpose pass 1
-		dct_interleave16(row0, row4);
-		dct_interleave16(row1, row5);
-		dct_interleave16(row2, row6);
-		dct_interleave16(row3, row7);
-
-		// transpose pass 2
-		dct_interleave16(row0, row2);
-		dct_interleave16(row1, row3);
-		dct_interleave16(row4, row6);
-		dct_interleave16(row5, row7);
-
-		// transpose pass 3
-		dct_interleave16(row0, row1);
-		dct_interleave16(row2, row3);
-		dct_interleave16(row4, row5);
-		dct_interleave16(row6, row7);
-	}
-
-	// row pass
-	dct_pass(bias_1, 17);
-
-	{
-		// pack
-		__m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7
-		__m128i p1 = _mm_packus_epi16(row2, row3);
-		__m128i p2 = _mm_packus_epi16(row4, row5);
-		__m128i p3 = _mm_packus_epi16(row6, row7);
-
-		// 8bit 8x8 transpose pass 1
-		dct_interleave8(p0, p2); // a0e0a1e1...
-		dct_interleave8(p1, p3); // c0g0c1g1...
-
-		// transpose pass 2
-		dct_interleave8(p0, p1); // a0c0e0g0...
-		dct_interleave8(p2, p3); // b0d0f0h0...
-
-		// transpose pass 3
-		dct_interleave8(p0, p2); // a0b0c0d0...
-		dct_interleave8(p1, p3); // a4b4c4d4...
-
-		// store
-		_mm_storel_epi64((__m128i*)out, p0);
-		out += out_stride;
-		_mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p0, 0x4e));
-		out += out_stride;
-		_mm_storel_epi64((__m128i*)out, p2);
-		out += out_stride;
-		_mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p2, 0x4e));
-		out += out_stride;
-		_mm_storel_epi64((__m128i*)out, p1);
-		out += out_stride;
-		_mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p1, 0x4e));
-		out += out_stride;
-		_mm_storel_epi64((__m128i*)out, p3);
-		out += out_stride;
-		_mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p3, 0x4e));
-	}
-
-#undef dct_const
-#undef dct_rot
-#undef dct_widen
-#undef dct_wadd
-#undef dct_wsub
-#undef dct_bfly32o
-#undef dct_interleave8
-#undef dct_interleave16
-#undef dct_pass
-}
-
-#endif // STBI_SSE2
-
-#ifdef STBI_NEON
-
-// NEON integer IDCT. should produce bit-identical
-// results to the generic C version.
-static void stbi__idct_simd(stbi_uc* out, int out_stride, short data[64]) {
-	int16x8_t row0, row1, row2, row3, row4, row5, row6, row7;
-
-	int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f));
-	int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f));
-	int16x4_t rot0_2 = vdup_n_s16(stbi__f2f(0.765366865f));
-	int16x4_t rot1_0 = vdup_n_s16(stbi__f2f(1.175875602f));
-	int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f));
-	int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f));
-	int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f));
-	int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f));
-	int16x4_t rot3_0 = vdup_n_s16(stbi__f2f(0.298631336f));
-	int16x4_t rot3_1 = vdup_n_s16(stbi__f2f(2.053119869f));
-	int16x4_t rot3_2 = vdup_n_s16(stbi__f2f(3.072711026f));
-	int16x4_t rot3_3 = vdup_n_s16(stbi__f2f(1.501321110f));
-
-#define dct_long_mul(out, inq, coeff)                                                                                                                          \
-	int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff);                                                                                                   \
-	int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff)
-
-#define dct_long_mac(out, acc, inq, coeff)                                                                                                                     \
-	int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff);                                                                                          \
-	int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff)
-
-#define dct_widen(out, inq)                                                                                                                                    \
-	int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12);                                                                                                    \
-	int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12)
-
-// wide add
-#define dct_wadd(out, a, b)                                                                                                                                    \
-	int32x4_t out##_l = vaddq_s32(a##_l, b##_l);                                                                                                               \
-	int32x4_t out##_h = vaddq_s32(a##_h, b##_h)
-
-// wide sub
-#define dct_wsub(out, a, b)                                                                                                                                    \
-	int32x4_t out##_l = vsubq_s32(a##_l, b##_l);                                                                                                               \
-	int32x4_t out##_h = vsubq_s32(a##_h, b##_h)
-
-// butterfly a/b, then shift using "shiftop" by "s" and pack
-#define dct_bfly32o(out0, out1, a, b, shiftop, s)                                                                                                              \
-	{                                                                                                                                                          \
-		dct_wadd(sum, a, b);                                                                                                                                   \
-		dct_wsub(dif, a, b);                                                                                                                                   \
-		out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s));                                                                                             \
-		out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s));                                                                                             \
-	}
-
-#define dct_pass(shiftop, shift)                                                                                                                               \
-	{                                                                                                                                                          \
-		/* even part */                                                                                                                                        \
-		int16x8_t sum26 = vaddq_s16(row2, row6);                                                                                                               \
-		dct_long_mul(p1e, sum26, rot0_0);                                                                                                                      \
-		dct_long_mac(t2e, p1e, row6, rot0_1);                                                                                                                  \
-		dct_long_mac(t3e, p1e, row2, rot0_2);                                                                                                                  \
-		int16x8_t sum04 = vaddq_s16(row0, row4);                                                                                                               \
-		int16x8_t dif04 = vsubq_s16(row0, row4);                                                                                                               \
-		dct_widen(t0e, sum04);                                                                                                                                 \
-		dct_widen(t1e, dif04);                                                                                                                                 \
-		dct_wadd(x0, t0e, t3e);                                                                                                                                \
-		dct_wsub(x3, t0e, t3e);                                                                                                                                \
-		dct_wadd(x1, t1e, t2e);                                                                                                                                \
-		dct_wsub(x2, t1e, t2e);                                                                                                                                \
-		/* odd part */                                                                                                                                         \
-		int16x8_t sum15 = vaddq_s16(row1, row5);                                                                                                               \
-		int16x8_t sum17 = vaddq_s16(row1, row7);                                                                                                               \
-		int16x8_t sum35 = vaddq_s16(row3, row5);                                                                                                               \
-		int16x8_t sum37 = vaddq_s16(row3, row7);                                                                                                               \
-		int16x8_t sumodd = vaddq_s16(sum17, sum35);                                                                                                            \
-		dct_long_mul(p5o, sumodd, rot1_0);                                                                                                                     \
-		dct_long_mac(p1o, p5o, sum17, rot1_1);                                                                                                                 \
-		dct_long_mac(p2o, p5o, sum35, rot1_2);                                                                                                                 \
-		dct_long_mul(p3o, sum37, rot2_0);                                                                                                                      \
-		dct_long_mul(p4o, sum15, rot2_1);                                                                                                                      \
-		dct_wadd(sump13o, p1o, p3o);                                                                                                                           \
-		dct_wadd(sump24o, p2o, p4o);                                                                                                                           \
-		dct_wadd(sump23o, p2o, p3o);                                                                                                                           \
-		dct_wadd(sump14o, p1o, p4o);                                                                                                                           \
-		dct_long_mac(x4, sump13o, row7, rot3_0);                                                                                                               \
-		dct_long_mac(x5, sump24o, row5, rot3_1);                                                                                                               \
-		dct_long_mac(x6, sump23o, row3, rot3_2);                                                                                                               \
-		dct_long_mac(x7, sump14o, row1, rot3_3);                                                                                                               \
-		dct_bfly32o(row0, row7, x0, x7, shiftop, shift);                                                                                                       \
-		dct_bfly32o(row1, row6, x1, x6, shiftop, shift);                                                                                                       \
-		dct_bfly32o(row2, row5, x2, x5, shiftop, shift);                                                                                                       \
-		dct_bfly32o(row3, row4, x3, x4, shiftop, shift);                                                                                                       \
-	}
-
-	// load
-	row0 = vld1q_s16(data + 0 * 8);
-	row1 = vld1q_s16(data + 1 * 8);
-	row2 = vld1q_s16(data + 2 * 8);
-	row3 = vld1q_s16(data + 3 * 8);
-	row4 = vld1q_s16(data + 4 * 8);
-	row5 = vld1q_s16(data + 5 * 8);
-	row6 = vld1q_s16(data + 6 * 8);
-	row7 = vld1q_s16(data + 7 * 8);
-
-	// add DC bias
-	row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0));
-
-	// column pass
-	dct_pass(vrshrn_n_s32, 10);
-
-	// 16bit 8x8 transpose
-	{
-// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively.
-// whether compilers actually get this is another story, sadly.
-#define dct_trn16(x, y)                                                                                                                                        \
-	{                                                                                                                                                          \
-		int16x8x2_t t = vtrnq_s16(x, y);                                                                                                                       \
-		x = t.val[0];                                                                                                                                          \
-		y = t.val[1];                                                                                                                                          \
-	}
-#define dct_trn32(x, y)                                                                                                                                        \
-	{                                                                                                                                                          \
-		int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y));                                                                         \
-		x = vreinterpretq_s16_s32(t.val[0]);                                                                                                                   \
-		y = vreinterpretq_s16_s32(t.val[1]);                                                                                                                   \
-	}
-#define dct_trn64(x, y)                                                                                                                                        \
-	{                                                                                                                                                          \
-		int16x8_t x0 = x;                                                                                                                                      \
-		int16x8_t y0 = y;                                                                                                                                      \
-		x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0));                                                                                                  \
-		y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0));                                                                                                \
-	}
-
-		// pass 1
-		dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6
-		dct_trn16(row2, row3);
-		dct_trn16(row4, row5);
-		dct_trn16(row6, row7);
-
-		// pass 2
-		dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4
-		dct_trn32(row1, row3);
-		dct_trn32(row4, row6);
-		dct_trn32(row5, row7);
-
-		// pass 3
-		dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0
-		dct_trn64(row1, row5);
-		dct_trn64(row2, row6);
-		dct_trn64(row3, row7);
-
-#undef dct_trn16
-#undef dct_trn32
-#undef dct_trn64
-	}
-
-	// row pass
-	// vrshrn_n_s32 only supports shifts up to 16, we need
-	// 17. so do a non-rounding shift of 16 first then follow
-	// up with a rounding shift by 1.
-	dct_pass(vshrn_n_s32, 16);
-
-	{
-		// pack and round
-		uint8x8_t p0 = vqrshrun_n_s16(row0, 1);
-		uint8x8_t p1 = vqrshrun_n_s16(row1, 1);
-		uint8x8_t p2 = vqrshrun_n_s16(row2, 1);
-		uint8x8_t p3 = vqrshrun_n_s16(row3, 1);
-		uint8x8_t p4 = vqrshrun_n_s16(row4, 1);
-		uint8x8_t p5 = vqrshrun_n_s16(row5, 1);
-		uint8x8_t p6 = vqrshrun_n_s16(row6, 1);
-		uint8x8_t p7 = vqrshrun_n_s16(row7, 1);
-
-		// again, these can translate into one instruction, but often don't.
-#define dct_trn8_8(x, y)                                                                                                                                       \
-	{                                                                                                                                                          \
-		uint8x8x2_t t = vtrn_u8(x, y);                                                                                                                         \
-		x = t.val[0];                                                                                                                                          \
-		y = t.val[1];                                                                                                                                          \
-	}
-#define dct_trn8_16(x, y)                                                                                                                                      \
-	{                                                                                                                                                          \
-		uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y));                                                                             \
-		x = vreinterpret_u8_u16(t.val[0]);                                                                                                                     \
-		y = vreinterpret_u8_u16(t.val[1]);                                                                                                                     \
-	}
-#define dct_trn8_32(x, y)                                                                                                                                      \
-	{                                                                                                                                                          \
-		uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y));                                                                             \
-		x = vreinterpret_u8_u32(t.val[0]);                                                                                                                     \
-		y = vreinterpret_u8_u32(t.val[1]);                                                                                                                     \
-	}
-
-		// sadly can't use interleaved stores here since we only write
-		// 8 bytes to each scan line!
-
-		// 8x8 8-bit transpose pass 1
-		dct_trn8_8(p0, p1);
-		dct_trn8_8(p2, p3);
-		dct_trn8_8(p4, p5);
-		dct_trn8_8(p6, p7);
-
-		// pass 2
-		dct_trn8_16(p0, p2);
-		dct_trn8_16(p1, p3);
-		dct_trn8_16(p4, p6);
-		dct_trn8_16(p5, p7);
-
-		// pass 3
-		dct_trn8_32(p0, p4);
-		dct_trn8_32(p1, p5);
-		dct_trn8_32(p2, p6);
-		dct_trn8_32(p3, p7);
-
-		// store
-		vst1_u8(out, p0);
-		out += out_stride;
-		vst1_u8(out, p1);
-		out += out_stride;
-		vst1_u8(out, p2);
-		out += out_stride;
-		vst1_u8(out, p3);
-		out += out_stride;
-		vst1_u8(out, p4);
-		out += out_stride;
-		vst1_u8(out, p5);
-		out += out_stride;
-		vst1_u8(out, p6);
-		out += out_stride;
-		vst1_u8(out, p7);
-
-#undef dct_trn8_8
-#undef dct_trn8_16
-#undef dct_trn8_32
-	}
-
-#undef dct_long_mul
-#undef dct_long_mac
-#undef dct_widen
-#undef dct_wadd
-#undef dct_wsub
-#undef dct_bfly32o
-#undef dct_pass
-}
-
-#endif // STBI_NEON
-
-#define STBI__MARKER_none 0xff
-// if there's a pending marker from the entropy stream, return that
-// otherwise, fetch from the stream and get a marker. if there's no
-// marker, return 0xff, which is never a valid marker value
-static stbi_uc stbi__get_marker(stbi__jpeg* j) {
-	stbi_uc x;
-	if (j->marker != STBI__MARKER_none) {
-		x = j->marker;
-		j->marker = STBI__MARKER_none;
-		return x;
-	}
-	x = stbi__get8(j->s);
-	if (x != 0xff)
-		return STBI__MARKER_none;
-	while (x == 0xff)
-		x = stbi__get8(j->s); // consume repeated 0xff fill bytes
-	return x;
-}
-
-// in each scan, we'll have scan_n components, and the order
-// of the components is specified by order[]
-#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7)
-
-// after a restart interval, stbi__jpeg_reset the entropy decoder and
-// the dc prediction
-static void stbi__jpeg_reset(stbi__jpeg* j) {
-	j->code_bits = 0;
-	j->code_buffer = 0;
-	j->nomore = 0;
-	j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0;
-	j->marker = STBI__MARKER_none;
-	j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff;
-	j->eob_run = 0;
-	// no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
-	// since we don't even allow 1<<30 pixels
-}
-
-static int stbi__parse_entropy_coded_data(stbi__jpeg* z) {
-	stbi__jpeg_reset(z);
-	if (!z->progressive) {
-		if (z->scan_n == 1) {
-			int i, j;
-			STBI_SIMD_ALIGN(short, data[64]);
-			int n = z->order[0];
-			// non-interleaved data, we just need to process one block at a
-			// time, in trivial scanline order number of blocks to do just
-			// depends on how many actual "pixels" this component has,
-			// independent of interleaved MCU blocking and such
-			int w = (z->img_comp[n].x + 7) >> 3;
-			int h = (z->img_comp[n].y + 7) >> 3;
-			for (j = 0; j < h; ++j) {
-				for (i = 0; i < w; ++i) {
-					int ha = z->img_comp[n].ha;
-					if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq]))
-						return 0;
-					z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data);
-					// every data block is an MCU, so countdown the restart
-					// interval
-					if (--z->todo <= 0) {
-						if (z->code_bits < 24)
-							stbi__grow_buffer_unsafe(z);
-						// if it's NOT a restart, then just bail, so we get
-						// corrupt data rather than no data
-						if (!STBI__RESTART(z->marker))
-							return 1;
-						stbi__jpeg_reset(z);
-					}
-				}
-			}
-			return 1;
-		} else { // interleaved
-			int i, j, k, x, y;
-			STBI_SIMD_ALIGN(short, data[64]);
-			for (j = 0; j < z->img_mcu_y; ++j) {
-				for (i = 0; i < z->img_mcu_x; ++i) {
-					// scan an interleaved mcu... process scan_n components in
-					// order
-					for (k = 0; k < z->scan_n; ++k) {
-						int n = z->order[k];
-						// scan out an mcu's worth of this component; that's
-						// just determined by the basic H and V specified for
-						// the component
-						for (y = 0; y < z->img_comp[n].v; ++y) {
-							for (x = 0; x < z->img_comp[n].h; ++x) {
-								int x2 = (i * z->img_comp[n].h + x) * 8;
-								int y2 = (j * z->img_comp[n].v + y) * 8;
-								int ha = z->img_comp[n].ha;
-								if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, z->fast_ac[ha], n,
-															 z->dequant[z->img_comp[n].tq]))
-									return 0;
-								z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * y2 + x2, z->img_comp[n].w2, data);
-							}
-						}
-					}
-					// after all interleaved components, that's an interleaved
-					// MCU, so now count down the restart interval
-					if (--z->todo <= 0) {
-						if (z->code_bits < 24)
-							stbi__grow_buffer_unsafe(z);
-						if (!STBI__RESTART(z->marker))
-							return 1;
-						stbi__jpeg_reset(z);
-					}
-				}
-			}
-			return 1;
-		}
-	} else {
-		if (z->scan_n == 1) {
-			int i, j;
-			int n = z->order[0];
-			// non-interleaved data, we just need to process one block at a
-			// time, in trivial scanline order number of blocks to do just
-			// depends on how many actual "pixels" this component has,
-			// independent of interleaved MCU blocking and such
-			int w = (z->img_comp[n].x + 7) >> 3;
-			int h = (z->img_comp[n].y + 7) >> 3;
-			for (j = 0; j < h; ++j) {
-				for (i = 0; i < w; ++i) {
-					short* data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
-					if (z->spec_start == 0) {
-						if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
-							return 0;
-					} else {
-						int ha = z->img_comp[n].ha;
-						if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha]))
-							return 0;
-					}
-					// every data block is an MCU, so countdown the restart
-					// interval
-					if (--z->todo <= 0) {
-						if (z->code_bits < 24)
-							stbi__grow_buffer_unsafe(z);
-						if (!STBI__RESTART(z->marker))
-							return 1;
-						stbi__jpeg_reset(z);
-					}
-				}
-			}
-			return 1;
-		} else { // interleaved
-			int i, j, k, x, y;
-			for (j = 0; j < z->img_mcu_y; ++j) {
-				for (i = 0; i < z->img_mcu_x; ++i) {
-					// scan an interleaved mcu... process scan_n components in
-					// order
-					for (k = 0; k < z->scan_n; ++k) {
-						int n = z->order[k];
-						// scan out an mcu's worth of this component; that's
-						// just determined by the basic H and V specified for
-						// the component
-						for (y = 0; y < z->img_comp[n].v; ++y) {
-							for (x = 0; x < z->img_comp[n].h; ++x) {
-								int x2 = (i * z->img_comp[n].h + x);
-								int y2 = (j * z->img_comp[n].v + y);
-								short* data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w);
-								if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
-									return 0;
-							}
-						}
-					}
-					// after all interleaved components, that's an interleaved
-					// MCU, so now count down the restart interval
-					if (--z->todo <= 0) {
-						if (z->code_bits < 24)
-							stbi__grow_buffer_unsafe(z);
-						if (!STBI__RESTART(z->marker))
-							return 1;
-						stbi__jpeg_reset(z);
-					}
-				}
-			}
-			return 1;
-		}
-	}
-}
-
-static void stbi__jpeg_dequantize(short* data, stbi__uint16* dequant) {
-	int i;
-	for (i = 0; i < 64; ++i)
-		data[i] *= dequant[i];
-}
-
-static void stbi__jpeg_finish(stbi__jpeg* z) {
-	if (z->progressive) {
-		// dequantize and idct the data
-		int i, j, n;
-		for (n = 0; n < z->s->img_n; ++n) {
-			int w = (z->img_comp[n].x + 7) >> 3;
-			int h = (z->img_comp[n].y + 7) >> 3;
-			for (j = 0; j < h; ++j) {
-				for (i = 0; i < w; ++i) {
-					short* data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
-					stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]);
-					z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data);
-				}
-			}
-		}
-	}
-}
-
-static int stbi__process_marker(stbi__jpeg* z, int m) {
-	int L;
-	switch (m) {
-	case STBI__MARKER_none: // no marker found
-		return stbi__err("expected marker", "Corrupt JPEG");
-
-	case 0xDD: // DRI - specify restart interval
-		if (stbi__get16be(z->s) != 4)
-			return stbi__err("bad DRI len", "Corrupt JPEG");
-		z->restart_interval = stbi__get16be(z->s);
-		return 1;
-
-	case 0xDB: // DQT - define quantization table
-		L = stbi__get16be(z->s) - 2;
-		while (L > 0) {
-			int q = stbi__get8(z->s);
-			int p = q >> 4, sixteen = (p != 0);
-			int t = q & 15, i;
-			if (p != 0 && p != 1)
-				return stbi__err("bad DQT type", "Corrupt JPEG");
-			if (t > 3)
-				return stbi__err("bad DQT table", "Corrupt JPEG");
-
-			for (i = 0; i < 64; ++i)
-				z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s));
-			L -= (sixteen ? 129 : 65);
-		}
-		return L == 0;
-
-	case 0xC4: // DHT - define huffman table
-		L = stbi__get16be(z->s) - 2;
-		while (L > 0) {
-			stbi_uc* v;
-			int sizes[16], i, n = 0;
-			int q = stbi__get8(z->s);
-			int tc = q >> 4;
-			int th = q & 15;
-			if (tc > 1 || th > 3)
-				return stbi__err("bad DHT header", "Corrupt JPEG");
-			for (i = 0; i < 16; ++i) {
-				sizes[i] = stbi__get8(z->s);
-				n += sizes[i];
-			}
-			L -= 17;
-			if (tc == 0) {
-				if (!stbi__build_huffman(z->huff_dc + th, sizes))
-					return 0;
-				v = z->huff_dc[th].values;
-			} else {
-				if (!stbi__build_huffman(z->huff_ac + th, sizes))
-					return 0;
-				v = z->huff_ac[th].values;
-			}
-			for (i = 0; i < n; ++i)
-				v[i] = stbi__get8(z->s);
-			if (tc != 0)
-				stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th);
-			L -= n;
-		}
-		return L == 0;
-	}
-
-	// check for comment block or APP blocks
-	if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) {
-		L = stbi__get16be(z->s);
-		if (L < 2) {
-			if (m == 0xFE)
-				return stbi__err("bad COM len", "Corrupt JPEG");
-			else
-				return stbi__err("bad APP len", "Corrupt JPEG");
-		}
-		L -= 2;
-
-		if (m == 0xE0 && L >= 5) { // JFIF APP0 segment
-			static const unsigned char tag[5] = {'J', 'F', 'I', 'F', '\0'};
-			int ok = 1;
-			int i;
-			for (i = 0; i < 5; ++i)
-				if (stbi__get8(z->s) != tag[i])
-					ok = 0;
-			L -= 5;
-			if (ok)
-				z->jfif = 1;
-		} else if (m == 0xEE && L >= 12) { // Adobe APP14 segment
-			static const unsigned char tag[6] = {'A', 'd', 'o', 'b', 'e', '\0'};
-			int ok = 1;
-			int i;
-			for (i = 0; i < 6; ++i)
-				if (stbi__get8(z->s) != tag[i])
-					ok = 0;
-			L -= 6;
-			if (ok) {
-				stbi__get8(z->s);							 // version
-				stbi__get16be(z->s);						 // flags0
-				stbi__get16be(z->s);						 // flags1
-				z->app14_color_transform = stbi__get8(z->s); // color transform
-				L -= 6;
-			}
-		}
-
-		stbi__skip(z->s, L);
-		return 1;
-	}
-
-	return stbi__err("unknown marker", "Corrupt JPEG");
-}
-
-// after we see SOS
-static int stbi__process_scan_header(stbi__jpeg* z) {
-	int i;
-	int Ls = stbi__get16be(z->s);
-	z->scan_n = stbi__get8(z->s);
-	if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int)z->s->img_n)
-		return stbi__err("bad SOS component count", "Corrupt JPEG");
-	if (Ls != 6 + 2 * z->scan_n)
-		return stbi__err("bad SOS len", "Corrupt JPEG");
-	for (i = 0; i < z->scan_n; ++i) {
-		int id = stbi__get8(z->s), which;
-		int q = stbi__get8(z->s);
-		for (which = 0; which < z->s->img_n; ++which)
-			if (z->img_comp[which].id == id)
-				break;
-		if (which == z->s->img_n)
-			return 0; // no match
-		z->img_comp[which].hd = q >> 4;
-		if (z->img_comp[which].hd > 3)
-			return stbi__err("bad DC huff", "Corrupt JPEG");
-		z->img_comp[which].ha = q & 15;
-		if (z->img_comp[which].ha > 3)
-			return stbi__err("bad AC huff", "Corrupt JPEG");
-		z->order[i] = which;
-	}
-
-	{
-		int aa;
-		z->spec_start = stbi__get8(z->s);
-		z->spec_end = stbi__get8(z->s); // should be 63, but might be 0
-		aa = stbi__get8(z->s);
-		z->succ_high = (aa >> 4);
-		z->succ_low = (aa & 15);
-		if (z->progressive) {
-			if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13)
-				return stbi__err("bad SOS", "Corrupt JPEG");
-		} else {
-			if (z->spec_start != 0)
-				return stbi__err("bad SOS", "Corrupt JPEG");
-			if (z->succ_high != 0 || z->succ_low != 0)
-				return stbi__err("bad SOS", "Corrupt JPEG");
-			z->spec_end = 63;
-		}
-	}
-
-	return 1;
-}
-
-static int stbi__free_jpeg_components(stbi__jpeg* z, int ncomp, int why) {
-	int i;
-	for (i = 0; i < ncomp; ++i) {
-		if (z->img_comp[i].raw_data) {
-			STBI_FREE(z->img_comp[i].raw_data);
-			z->img_comp[i].raw_data = NULL;
-			z->img_comp[i].data = NULL;
-		}
-		if (z->img_comp[i].raw_coeff) {
-			STBI_FREE(z->img_comp[i].raw_coeff);
-			z->img_comp[i].raw_coeff = 0;
-			z->img_comp[i].coeff = 0;
-		}
-		if (z->img_comp[i].linebuf) {
-			STBI_FREE(z->img_comp[i].linebuf);
-			z->img_comp[i].linebuf = NULL;
-		}
-	}
-	return why;
-}
-
-static int stbi__process_frame_header(stbi__jpeg* z, int scan) {
-	stbi__context* s = z->s;
-	int Lf, p, i, q, h_max = 1, v_max = 1, c;
-	Lf = stbi__get16be(s);
-	if (Lf < 11)
-		return stbi__err("bad SOF len", "Corrupt JPEG"); // JPEG
-	p = stbi__get8(s);
-	if (p != 8)
-		return stbi__err("only 8-bit",
-						 "JPEG format not supported: 8-bit only"); // JPEG baseline
-	s->img_y = stbi__get16be(s);
-	if (s->img_y == 0)
-		return stbi__err("no header height",
-						 "JPEG format not supported: delayed height"); // Legal, but we don't
-																	   // handle it--but
-																	   // neither does IJG
-	s->img_x = stbi__get16be(s);
-	if (s->img_x == 0)
-		return stbi__err("0 width", "Corrupt JPEG"); // JPEG requires
-	c = stbi__get8(s);
-	if (c != 3 && c != 1 && c != 4)
-		return stbi__err("bad component count", "Corrupt JPEG");
-	s->img_n = c;
-	for (i = 0; i < c; ++i) {
-		z->img_comp[i].data = NULL;
-		z->img_comp[i].linebuf = NULL;
-	}
-
-	if (Lf != 8 + 3 * s->img_n)
-		return stbi__err("bad SOF len", "Corrupt JPEG");
-
-	z->rgb = 0;
-	for (i = 0; i < s->img_n; ++i) {
-		static const unsigned char rgb[3] = {'R', 'G', 'B'};
-		z->img_comp[i].id = stbi__get8(s);
-		if (s->img_n == 3 && z->img_comp[i].id == rgb[i])
-			++z->rgb;
-		q = stbi__get8(s);
-		z->img_comp[i].h = (q >> 4);
-		if (!z->img_comp[i].h || z->img_comp[i].h > 4)
-			return stbi__err("bad H", "Corrupt JPEG");
-		z->img_comp[i].v = q & 15;
-		if (!z->img_comp[i].v || z->img_comp[i].v > 4)
-			return stbi__err("bad V", "Corrupt JPEG");
-		z->img_comp[i].tq = stbi__get8(s);
-		if (z->img_comp[i].tq > 3)
-			return stbi__err("bad TQ", "Corrupt JPEG");
-	}
-
-	if (scan != STBI__SCAN_load)
-		return 1;
-
-	if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0))
-		return stbi__err("too large", "Image too large to decode");
-
-	for (i = 0; i < s->img_n; ++i) {
-		if (z->img_comp[i].h > h_max)
-			h_max = z->img_comp[i].h;
-		if (z->img_comp[i].v > v_max)
-			v_max = z->img_comp[i].v;
-	}
-
-	// compute interleaved mcu info
-	z->img_h_max = h_max;
-	z->img_v_max = v_max;
-	z->img_mcu_w = h_max * 8;
-	z->img_mcu_h = v_max * 8;
-	// these sizes can't be more than 17 bits
-	z->img_mcu_x = (s->img_x + z->img_mcu_w - 1) / z->img_mcu_w;
-	z->img_mcu_y = (s->img_y + z->img_mcu_h - 1) / z->img_mcu_h;
-
-	for (i = 0; i < s->img_n; ++i) {
-		// number of effective pixels (e.g. for non-interleaved MCU)
-		z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max - 1) / h_max;
-		z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max - 1) / v_max;
-		// to simplify generation, we'll allocate enough memory to decode
-		// the bogus oversized data from using interleaved MCUs and their
-		// big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't
-		// discard the extra data until colorspace conversion
-		//
-		// img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked
-		// earlier) so these muls can't overflow with 32-bit ints (which we
-		// require)
-		z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8;
-		z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8;
-		z->img_comp[i].coeff = 0;
-		z->img_comp[i].raw_coeff = 0;
-		z->img_comp[i].linebuf = NULL;
-		z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15);
-		if (z->img_comp[i].raw_data == NULL)
-			return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory"));
-		// align blocks for idct using mmx/sse
-		z->img_comp[i].data = (stbi_uc*)(((size_t)z->img_comp[i].raw_data + 15) & ~15);
-		if (z->progressive) {
-			// w2, h2 are multiples of 8 (see above)
-			z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8;
-			z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8;
-			z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15);
-			if (z->img_comp[i].raw_coeff == NULL)
-				return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory"));
-			z->img_comp[i].coeff = (short*)(((size_t)z->img_comp[i].raw_coeff + 15) & ~15);
-		}
-	}
-
-	return 1;
-}
-
-// use comparisons since in some cases we handle more than one case (e.g. SOF)
-#define stbi__DNL(x) ((x) == 0xdc)
-#define stbi__SOI(x) ((x) == 0xd8)
-#define stbi__EOI(x) ((x) == 0xd9)
-#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2)
-#define stbi__SOS(x) ((x) == 0xda)
-
-#define stbi__SOF_progressive(x) ((x) == 0xc2)
-
-static int stbi__decode_jpeg_header(stbi__jpeg* z, int scan) {
-	int m;
-	z->jfif = 0;
-	z->app14_color_transform = -1; // valid values are 0,1,2
-	z->marker = STBI__MARKER_none; // initialize cached marker to empty
-	m = stbi__get_marker(z);
-	if (!stbi__SOI(m))
-		return stbi__err("no SOI", "Corrupt JPEG");
-	if (scan == STBI__SCAN_type)
-		return 1;
-	m = stbi__get_marker(z);
-	while (!stbi__SOF(m)) {
-		if (!stbi__process_marker(z, m))
-			return 0;
-		m = stbi__get_marker(z);
-		while (m == STBI__MARKER_none) {
-			// some files have extra padding after their blocks, so ok, we'll
-			// scan
-			if (stbi__at_eof(z->s))
-				return stbi__err("no SOF", "Corrupt JPEG");
-			m = stbi__get_marker(z);
-		}
-	}
-	z->progressive = stbi__SOF_progressive(m);
-	if (!stbi__process_frame_header(z, scan))
-		return 0;
-	return 1;
-}
-
-// decode image to YCbCr format
-static int stbi__decode_jpeg_image(stbi__jpeg* j) {
-	int m;
-	for (m = 0; m < 4; m++) {
-		j->img_comp[m].raw_data = NULL;
-		j->img_comp[m].raw_coeff = NULL;
-	}
-	j->restart_interval = 0;
-	if (!stbi__decode_jpeg_header(j, STBI__SCAN_load))
-		return 0;
-	m = stbi__get_marker(j);
-	while (!stbi__EOI(m)) {
-		if (stbi__SOS(m)) {
-			if (!stbi__process_scan_header(j))
-				return 0;
-			if (!stbi__parse_entropy_coded_data(j))
-				return 0;
-			if (j->marker == STBI__MARKER_none) {
-				// handle 0s at the end of image data from IP Kamera 9060
-				while (!stbi__at_eof(j->s)) {
-					int x = stbi__get8(j->s);
-					if (x == 255) {
-						j->marker = stbi__get8(j->s);
-						break;
-					}
-				}
-				// if we reach eof without hitting a marker, stbi__get_marker()
-				// below will fail and we'll eventually return 0
-			}
-		} else if (stbi__DNL(m)) {
-			int Ld = stbi__get16be(j->s);
-			stbi__uint32 NL = stbi__get16be(j->s);
-			if (Ld != 4)
-				return stbi__err("bad DNL len", "Corrupt JPEG");
-			if (NL != j->s->img_y)
-				return stbi__err("bad DNL height", "Corrupt JPEG");
-		} else {
-			if (!stbi__process_marker(j, m))
-				return 0;
-		}
-		m = stbi__get_marker(j);
-	}
-	if (j->progressive)
-		stbi__jpeg_finish(j);
-	return 1;
-}
-
-// static jfif-centered resampling (across block boundaries)
-
-typedef stbi_uc* (*resample_row_func)(stbi_uc* out, stbi_uc* in0, stbi_uc* in1, int w, int hs);
-
-#define stbi__div4(x) ((stbi_uc)((x) >> 2))
-
-static stbi_uc* resample_row_1(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
-	STBI_NOTUSED(out);
-	STBI_NOTUSED(in_far);
-	STBI_NOTUSED(w);
-	STBI_NOTUSED(hs);
-	return in_near;
-}
-
-static stbi_uc* stbi__resample_row_v_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
-	// need to generate two samples vertically for every one in input
-	int i;
-	STBI_NOTUSED(hs);
-	for (i = 0; i < w; ++i)
-		out[i] = stbi__div4(3 * in_near[i] + in_far[i] + 2);
-	return out;
-}
-
-static stbi_uc* stbi__resample_row_h_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
-	// need to generate two samples horizontally for every one in input
-	int i;
-	stbi_uc* input = in_near;
-
-	if (w == 1) {
-		// if only one sample, can't do any interpolation
-		out[0] = out[1] = input[0];
-		return out;
-	}
-
-	out[0] = input[0];
-	out[1] = stbi__div4(input[0] * 3 + input[1] + 2);
-	for (i = 1; i < w - 1; ++i) {
-		int n = 3 * input[i] + 2;
-		out[i * 2 + 0] = stbi__div4(n + input[i - 1]);
-		out[i * 2 + 1] = stbi__div4(n + input[i + 1]);
-	}
-	out[i * 2 + 0] = stbi__div4(input[w - 2] * 3 + input[w - 1] + 2);
-	out[i * 2 + 1] = input[w - 1];
-
-	STBI_NOTUSED(in_far);
-	STBI_NOTUSED(hs);
-
-	return out;
-}
-
-#define stbi__div16(x) ((stbi_uc)((x) >> 4))
-
-static stbi_uc* stbi__resample_row_hv_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
-	// need to generate 2x2 samples for every one in input
-	int i, t0, t1;
-	if (w == 1) {
-		out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2);
-		return out;
-	}
-
-	t1 = 3 * in_near[0] + in_far[0];
-	out[0] = stbi__div4(t1 + 2);
-	for (i = 1; i < w; ++i) {
-		t0 = t1;
-		t1 = 3 * in_near[i] + in_far[i];
-		out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8);
-		out[i * 2] = stbi__div16(3 * t1 + t0 + 8);
-	}
-	out[w * 2 - 1] = stbi__div4(t1 + 2);
-
-	STBI_NOTUSED(hs);
-
-	return out;
-}
-
-#if defined(STBI_SSE2) || defined(STBI_NEON)
-static stbi_uc* stbi__resample_row_hv_2_simd(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
-	// need to generate 2x2 samples for every one in input
-	int i = 0, t0, t1;
-
-	if (w == 1) {
-		out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2);
-		return out;
-	}
-
-	t1 = 3 * in_near[0] + in_far[0];
-	// process groups of 8 pixels for as long as we can.
-	// note we can't handle the last pixel in a row in this loop
-	// because we need to handle the filter boundary conditions.
-	for (; i < ((w - 1) & ~7); i += 8) {
-#if defined(STBI_SSE2)
-		// load and perform the vertical filtering pass
-		// this uses 3*x + y = 4*x + (y - x)
-		__m128i zero = _mm_setzero_si128();
-		__m128i farb = _mm_loadl_epi64((__m128i*)(in_far + i));
-		__m128i nearb = _mm_loadl_epi64((__m128i*)(in_near + i));
-		__m128i farw = _mm_unpacklo_epi8(farb, zero);
-		__m128i nearw = _mm_unpacklo_epi8(nearb, zero);
-		__m128i diff = _mm_sub_epi16(farw, nearw);
-		__m128i nears = _mm_slli_epi16(nearw, 2);
-		__m128i curr = _mm_add_epi16(nears, diff); // current row
-
-		// horizontal filter works the same based on shifted vers of current
-		// row. "prev" is current row shifted right by 1 pixel; we need to
-		// insert the previous pixel value (from t1).
-		// "next" is current row shifted left by 1 pixel, with first pixel
-		// of next block of 8 pixels added in.
-		__m128i prv0 = _mm_slli_si128(curr, 2);
-		__m128i nxt0 = _mm_srli_si128(curr, 2);
-		__m128i prev = _mm_insert_epi16(prv0, t1, 0);
-		__m128i next = _mm_insert_epi16(nxt0, 3 * in_near[i + 8] + in_far[i + 8], 7);
-
-		// horizontal filter, polyphase implementation since it's convenient:
-		// even pixels = 3*cur + prev = cur*4 + (prev - cur)
-		// odd  pixels = 3*cur + next = cur*4 + (next - cur)
-		// note the shared term.
-		__m128i bias = _mm_set1_epi16(8);
-		__m128i curs = _mm_slli_epi16(curr, 2);
-		__m128i prvd = _mm_sub_epi16(prev, curr);
-		__m128i nxtd = _mm_sub_epi16(next, curr);
-		__m128i curb = _mm_add_epi16(curs, bias);
-		__m128i even = _mm_add_epi16(prvd, curb);
-		__m128i odd = _mm_add_epi16(nxtd, curb);
-
-		// interleave even and odd pixels, then undo scaling.
-		__m128i int0 = _mm_unpacklo_epi16(even, odd);
-		__m128i int1 = _mm_unpackhi_epi16(even, odd);
-		__m128i de0 = _mm_srli_epi16(int0, 4);
-		__m128i de1 = _mm_srli_epi16(int1, 4);
-
-		// pack and write output
-		__m128i outv = _mm_packus_epi16(de0, de1);
-		_mm_storeu_si128((__m128i*)(out + i * 2), outv);
-#elif defined(STBI_NEON)
-		// load and perform the vertical filtering pass
-		// this uses 3*x + y = 4*x + (y - x)
-		uint8x8_t farb = vld1_u8(in_far + i);
-		uint8x8_t nearb = vld1_u8(in_near + i);
-		int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb));
-		int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2));
-		int16x8_t curr = vaddq_s16(nears, diff); // current row
-
-		// horizontal filter works the same based on shifted vers of current
-		// row. "prev" is current row shifted right by 1 pixel; we need to
-		// insert the previous pixel value (from t1).
-		// "next" is current row shifted left by 1 pixel, with first pixel
-		// of next block of 8 pixels added in.
-		int16x8_t prv0 = vextq_s16(curr, curr, 7);
-		int16x8_t nxt0 = vextq_s16(curr, curr, 1);
-		int16x8_t prev = vsetq_lane_s16(t1, prv0, 0);
-		int16x8_t next = vsetq_lane_s16(3 * in_near[i + 8] + in_far[i + 8], nxt0, 7);
-
-		// horizontal filter, polyphase implementation since it's convenient:
-		// even pixels = 3*cur + prev = cur*4 + (prev - cur)
-		// odd  pixels = 3*cur + next = cur*4 + (next - cur)
-		// note the shared term.
-		int16x8_t curs = vshlq_n_s16(curr, 2);
-		int16x8_t prvd = vsubq_s16(prev, curr);
-		int16x8_t nxtd = vsubq_s16(next, curr);
-		int16x8_t even = vaddq_s16(curs, prvd);
-		int16x8_t odd = vaddq_s16(curs, nxtd);
-
-		// undo scaling and round, then store with even/odd phases interleaved
-		uint8x8x2_t o;
-		o.val[0] = vqrshrun_n_s16(even, 4);
-		o.val[1] = vqrshrun_n_s16(odd, 4);
-		vst2_u8(out + i * 2, o);
-#endif
-
-		// "previous" value for next iter
-		t1 = 3 * in_near[i + 7] + in_far[i + 7];
-	}
-
-	t0 = t1;
-	t1 = 3 * in_near[i] + in_far[i];
-	out[i * 2] = stbi__div16(3 * t1 + t0 + 8);
-
-	for (++i; i < w; ++i) {
-		t0 = t1;
-		t1 = 3 * in_near[i] + in_far[i];
-		out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8);
-		out[i * 2] = stbi__div16(3 * t1 + t0 + 8);
-	}
-	out[w * 2 - 1] = stbi__div4(t1 + 2);
-
-	STBI_NOTUSED(hs);
-
-	return out;
-}
-#endif
-
-static stbi_uc* stbi__resample_row_generic(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) {
-	// resample with nearest-neighbor
-	int i, j;
-	STBI_NOTUSED(in_far);
-	for (i = 0; i < w; ++i)
-		for (j = 0; j < hs; ++j)
-			out[i * hs + j] = in_near[i];
-	return out;
-}
-
-// this is a reduced-precision calculation of YCbCr-to-RGB introduced
-// to make sure the code produces the same results in both SIMD and scalar
-#define stbi__float2fixed(x) (((int)((x)*4096.0f + 0.5f)) << 8)
-static void stbi__YCbCr_to_RGB_row(stbi_uc* out, const stbi_uc* y, const stbi_uc* pcb, const stbi_uc* pcr, int count, int step) {
-	int i;
-	for (i = 0; i < count; ++i) {
-		int y_fixed = (y[i] << 20) + (1 << 19); // rounding
-		int r, g, b;
-		int cr = pcr[i] - 128;
-		int cb = pcb[i] - 128;
-		r = y_fixed + cr * stbi__float2fixed(1.40200f);
-		g = y_fixed + (cr * -stbi__float2fixed(0.71414f)) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000);
-		b = y_fixed + cb * stbi__float2fixed(1.77200f);
-		r >>= 20;
-		g >>= 20;
-		b >>= 20;
-		if ((unsigned)r > 255) {
-			if (r < 0)
-				r = 0;
-			else
-				r = 255;
-		}
-		if ((unsigned)g > 255) {
-			if (g < 0)
-				g = 0;
-			else
-				g = 255;
-		}
-		if ((unsigned)b > 255) {
-			if (b < 0)
-				b = 0;
-			else
-				b = 255;
-		}
-		out[0] = (stbi_uc)r;
-		out[1] = (stbi_uc)g;
-		out[2] = (stbi_uc)b;
-		out[3] = 255;
-		out += step;
-	}
-}
-
-#if defined(STBI_SSE2) || defined(STBI_NEON)
-static void stbi__YCbCr_to_RGB_simd(stbi_uc* out, stbi_uc const* y, stbi_uc const* pcb, stbi_uc const* pcr, int count, int step) {
-	int i = 0;
-
-#ifdef STBI_SSE2
-	// step == 3 is pretty ugly on the final interleave, and i'm not convinced
-	// it's useful in practice (you wouldn't use it for textures, for example).
-	// so just accelerate step == 4 case.
-	if (step == 4) {
-		// this is a fairly straightforward implementation and not
-		// super-optimized.
-		__m128i signflip = _mm_set1_epi8(-0x80);
-		__m128i cr_const0 = _mm_set1_epi16((short)(1.40200f * 4096.0f + 0.5f));
-		__m128i cr_const1 = _mm_set1_epi16(-(short)(0.71414f * 4096.0f + 0.5f));
-		__m128i cb_const0 = _mm_set1_epi16(-(short)(0.34414f * 4096.0f + 0.5f));
-		__m128i cb_const1 = _mm_set1_epi16((short)(1.77200f * 4096.0f + 0.5f));
-		__m128i y_bias = _mm_set1_epi8((char)(unsigned char)128);
-		__m128i xw = _mm_set1_epi16(255); // alpha channel
-
-		for (; i + 7 < count; i += 8) {
-			// load
-			__m128i y_bytes = _mm_loadl_epi64((__m128i*)(y + i));
-			__m128i cr_bytes = _mm_loadl_epi64((__m128i*)(pcr + i));
-			__m128i cb_bytes = _mm_loadl_epi64((__m128i*)(pcb + i));
-			__m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128
-			__m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128
-
-			// unpack to short (and left-shift cr, cb by 8)
-			__m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes);
-			__m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased);
-			__m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased);
-
-			// color transform
-			__m128i yws = _mm_srli_epi16(yw, 4);
-			__m128i cr0 = _mm_mulhi_epi16(cr_const0, crw);
-			__m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw);
-			__m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1);
-			__m128i cr1 = _mm_mulhi_epi16(crw, cr_const1);
-			__m128i rws = _mm_add_epi16(cr0, yws);
-			__m128i gwt = _mm_add_epi16(cb0, yws);
-			__m128i bws = _mm_add_epi16(yws, cb1);
-			__m128i gws = _mm_add_epi16(gwt, cr1);
-
-			// descale
-			__m128i rw = _mm_srai_epi16(rws, 4);
-			__m128i bw = _mm_srai_epi16(bws, 4);
-			__m128i gw = _mm_srai_epi16(gws, 4);
-
-			// back to byte, set up for transpose
-			__m128i brb = _mm_packus_epi16(rw, bw);
-			__m128i gxb = _mm_packus_epi16(gw, xw);
-
-			// transpose to interleave channels
-			__m128i t0 = _mm_unpacklo_epi8(brb, gxb);
-			__m128i t1 = _mm_unpackhi_epi8(brb, gxb);
-			__m128i o0 = _mm_unpacklo_epi16(t0, t1);
-			__m128i o1 = _mm_unpackhi_epi16(t0, t1);
-
-			// store
-			_mm_storeu_si128((__m128i*)(out + 0), o0);
-			_mm_storeu_si128((__m128i*)(out + 16), o1);
-			out += 32;
-		}
-	}
-#endif
-
-#ifdef STBI_NEON
-	// in this version, step=3 support would be easy to add. but is there
-	// demand?
-	if (step == 4) {
-		// this is a fairly straightforward implementation and not
-		// super-optimized.
-		uint8x8_t signflip = vdup_n_u8(0x80);
-		int16x8_t cr_const0 = vdupq_n_s16((short)(1.40200f * 4096.0f + 0.5f));
-		int16x8_t cr_const1 = vdupq_n_s16(-(short)(0.71414f * 4096.0f + 0.5f));
-		int16x8_t cb_const0 = vdupq_n_s16(-(short)(0.34414f * 4096.0f + 0.5f));
-		int16x8_t cb_const1 = vdupq_n_s16((short)(1.77200f * 4096.0f + 0.5f));
-
-		for (; i + 7 < count; i += 8) {
-			// load
-			uint8x8_t y_bytes = vld1_u8(y + i);
-			uint8x8_t cr_bytes = vld1_u8(pcr + i);
-			uint8x8_t cb_bytes = vld1_u8(pcb + i);
-			int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip));
-			int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip));
-
-			// expand to s16
-			int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4));
-			int16x8_t crw = vshll_n_s8(cr_biased, 7);
-			int16x8_t cbw = vshll_n_s8(cb_biased, 7);
-
-			// color transform
-			int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0);
-			int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0);
-			int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1);
-			int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1);
-			int16x8_t rws = vaddq_s16(yws, cr0);
-			int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1);
-			int16x8_t bws = vaddq_s16(yws, cb1);
-
-			// undo scaling, round, convert to byte
-			uint8x8x4_t o;
-			o.val[0] = vqrshrun_n_s16(rws, 4);
-			o.val[1] = vqrshrun_n_s16(gws, 4);
-			o.val[2] = vqrshrun_n_s16(bws, 4);
-			o.val[3] = vdup_n_u8(255);
-
-			// store, interleaving r/g/b/a
-			vst4_u8(out, o);
-			out += 8 * 4;
-		}
-	}
-#endif
-
-	for (; i < count; ++i) {
-		int y_fixed = (y[i] << 20) + (1 << 19); // rounding
-		int r, g, b;
-		int cr = pcr[i] - 128;
-		int cb = pcb[i] - 128;
-		r = y_fixed + cr * stbi__float2fixed(1.40200f);
-		g = y_fixed + cr * -stbi__float2fixed(0.71414f) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000);
-		b = y_fixed + cb * stbi__float2fixed(1.77200f);
-		r >>= 20;
-		g >>= 20;
-		b >>= 20;
-		if ((unsigned)r > 255) {
-			if (r < 0)
-				r = 0;
-			else
-				r = 255;
-		}
-		if ((unsigned)g > 255) {
-			if (g < 0)
-				g = 0;
-			else
-				g = 255;
-		}
-		if ((unsigned)b > 255) {
-			if (b < 0)
-				b = 0;
-			else
-				b = 255;
-		}
-		out[0] = (stbi_uc)r;
-		out[1] = (stbi_uc)g;
-		out[2] = (stbi_uc)b;
-		out[3] = 255;
-		out += step;
-	}
-}
-#endif
-
-// set up the kernels
-static void stbi__setup_jpeg(stbi__jpeg* j) {
-	j->idct_block_kernel = stbi__idct_block;
-	j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row;
-	j->resample_row_hv_2_kernel = stbi__resample_row_hv_2;
-
-#ifdef STBI_SSE2
-	if (stbi__sse2_available()) {
-		j->idct_block_kernel = stbi__idct_simd;
-		j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
-		j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
-	}
-#endif
-
-#ifdef STBI_NEON
-	j->idct_block_kernel = stbi__idct_simd;
-	j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
-	j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
-#endif
-}
-
-// clean up the temporary component buffers
-static void stbi__cleanup_jpeg(stbi__jpeg* j) { stbi__free_jpeg_components(j, j->s->img_n, 0); }
-
-typedef struct {
-	resample_row_func resample;
-	stbi_uc *line0, *line1;
-	int hs, vs;  // expansion factor in each axis
-	int w_lores; // horizontal pixels pre-expansion
-	int ystep;   // how far through vertical expansion we are
-	int ypos;	// which pre-expansion row we're on
-} stbi__resample;
-
-// fast 0..255 * 0..255 => 0..255 rounded multiplication
-static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) {
-	unsigned int t = x * y + 128;
-	return (stbi_uc)((t + (t >> 8)) >> 8);
-}
-
-static stbi_uc* load_jpeg_image(stbi__jpeg* z, int* out_x, int* out_y, int* comp, int req_comp) {
-	int n, decode_n, is_rgb;
-	z->s->img_n = 0; // make stbi__cleanup_jpeg safe
-
-	// validate req_comp
-	if (req_comp < 0 || req_comp > 4)
-		return stbi__errpuc("bad req_comp", "Internal error");
-
-	// load a jpeg image from whichever source, but leave in YCbCr format
-	if (!stbi__decode_jpeg_image(z)) {
-		stbi__cleanup_jpeg(z);
-		return NULL;
-	}
-
-	// determine actual number of components to generate
-	n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1;
-
-	is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif));
-
-	if (z->s->img_n == 3 && n < 3 && !is_rgb)
-		decode_n = 1;
-	else
-		decode_n = z->s->img_n;
-
-	// resample and color-convert
-	{
-		int k;
-		unsigned int i, j;
-		stbi_uc* output;
-		stbi_uc* coutput[4] = {NULL, NULL, NULL, NULL};
-
-		stbi__resample res_comp[4];
-
-		for (k = 0; k < decode_n; ++k) {
-			stbi__resample* r = &res_comp[k];
-
-			// allocate line buffer big enough for upsampling off the edges
-			// with upsample factor of 4
-			z->img_comp[k].linebuf = (stbi_uc*)stbi__malloc(z->s->img_x + 3);
-			if (!z->img_comp[k].linebuf) {
-				stbi__cleanup_jpeg(z);
-				return stbi__errpuc("outofmem", "Out of memory");
-			}
-
-			r->hs = z->img_h_max / z->img_comp[k].h;
-			r->vs = z->img_v_max / z->img_comp[k].v;
-			r->ystep = r->vs >> 1;
-			r->w_lores = (z->s->img_x + r->hs - 1) / r->hs;
-			r->ypos = 0;
-			r->line0 = r->line1 = z->img_comp[k].data;
-
-			if (r->hs == 1 && r->vs == 1)
-				r->resample = resample_row_1;
-			else if (r->hs == 1 && r->vs == 2)
-				r->resample = stbi__resample_row_v_2;
-			else if (r->hs == 2 && r->vs == 1)
-				r->resample = stbi__resample_row_h_2;
-			else if (r->hs == 2 && r->vs == 2)
-				r->resample = z->resample_row_hv_2_kernel;
-			else
-				r->resample = stbi__resample_row_generic;
-		}
-
-		// can't error after this so, this is safe
-		output = (stbi_uc*)stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1);
-		if (!output) {
-			stbi__cleanup_jpeg(z);
-			return stbi__errpuc("outofmem", "Out of memory");
-		}
-
-		// now go ahead and resample
-		for (j = 0; j < z->s->img_y; ++j) {
-			stbi_uc* out = output + n * z->s->img_x * j;
-			for (k = 0; k < decode_n; ++k) {
-				stbi__resample* r = &res_comp[k];
-				int y_bot = r->ystep >= (r->vs >> 1);
-				coutput[k] = r->resample(z->img_comp[k].linebuf, y_bot ? r->line1 : r->line0, y_bot ? r->line0 : r->line1, r->w_lores, r->hs);
-				if (++r->ystep >= r->vs) {
-					r->ystep = 0;
-					r->line0 = r->line1;
-					if (++r->ypos < z->img_comp[k].y)
-						r->line1 += z->img_comp[k].w2;
-				}
-			}
-			if (n >= 3) {
-				stbi_uc* y = coutput[0];
-				if (z->s->img_n == 3) {
-					if (is_rgb) {
-						for (i = 0; i < z->s->img_x; ++i) {
-							out[0] = y[i];
-							out[1] = coutput[1][i];
-							out[2] = coutput[2][i];
-							out[3] = 255;
-							out += n;
-						}
-					} else {
-						z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
-					}
-				} else if (z->s->img_n == 4) {
-					if (z->app14_color_transform == 0) { // CMYK
-						for (i = 0; i < z->s->img_x; ++i) {
-							stbi_uc m = coutput[3][i];
-							out[0] = stbi__blinn_8x8(coutput[0][i], m);
-							out[1] = stbi__blinn_8x8(coutput[1][i], m);
-							out[2] = stbi__blinn_8x8(coutput[2][i], m);
-							out[3] = 255;
-							out += n;
-						}
-					} else if (z->app14_color_transform == 2) { // YCCK
-						z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
-						for (i = 0; i < z->s->img_x; ++i) {
-							stbi_uc m = coutput[3][i];
-							out[0] = stbi__blinn_8x8(255 - out[0], m);
-							out[1] = stbi__blinn_8x8(255 - out[1], m);
-							out[2] = stbi__blinn_8x8(255 - out[2], m);
-							out += n;
-						}
-					} else { // YCbCr + alpha?  Ignore the fourth channel for
-							 // now
-						z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
-					}
-				} else
-					for (i = 0; i < z->s->img_x; ++i) {
-						out[0] = out[1] = out[2] = y[i];
-						out[3] = 255; // not used if n==3
-						out += n;
-					}
-			} else {
-				if (is_rgb) {
-					if (n == 1)
-						for (i = 0; i < z->s->img_x; ++i)
-							*out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
-					else {
-						for (i = 0; i < z->s->img_x; ++i, out += 2) {
-							out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
-							out[1] = 255;
-						}
-					}
-				} else if (z->s->img_n == 4 && z->app14_color_transform == 0) {
-					for (i = 0; i < z->s->img_x; ++i) {
-						stbi_uc m = coutput[3][i];
-						stbi_uc r = stbi__blinn_8x8(coutput[0][i], m);
-						stbi_uc g = stbi__blinn_8x8(coutput[1][i], m);
-						stbi_uc b = stbi__blinn_8x8(coutput[2][i], m);
-						out[0] = stbi__compute_y(r, g, b);
-						out[1] = 255;
-						out += n;
-					}
-				} else if (z->s->img_n == 4 && z->app14_color_transform == 2) {
-					for (i = 0; i < z->s->img_x; ++i) {
-						out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]);
-						out[1] = 255;
-						out += n;
-					}
-				} else {
-					stbi_uc* y = coutput[0];
-					if (n == 1)
-						for (i = 0; i < z->s->img_x; ++i)
-							out[i] = y[i];
-					else
-						for (i = 0; i < z->s->img_x; ++i) {
-							*out++ = y[i];
-							*out++ = 255;
-						}
-				}
-			}
-		}
-		stbi__cleanup_jpeg(z);
-		*out_x = z->s->img_x;
-		*out_y = z->s->img_y;
-		if (comp)
-			*comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output
-		return output;
-	}
-}
-
-static void* stbi__jpeg_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
-	unsigned char* result;
-	stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
-	STBI_NOTUSED(ri);
-	j->s = s;
-	stbi__setup_jpeg(j);
-	result = load_jpeg_image(j, x, y, comp, req_comp);
-	STBI_FREE(j);
-	return result;
-}
-
-static int stbi__jpeg_test(stbi__context* s) {
-	int r;
-	stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
-	j->s = s;
-	stbi__setup_jpeg(j);
-	r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
-	stbi__rewind(s);
-	STBI_FREE(j);
-	return r;
-}
-
-static int stbi__jpeg_info_raw(stbi__jpeg* j, int* x, int* y, int* comp) {
-	if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) {
-		stbi__rewind(j->s);
-		return 0;
-	}
-	if (x)
-		*x = j->s->img_x;
-	if (y)
-		*y = j->s->img_y;
-	if (comp)
-		*comp = j->s->img_n >= 3 ? 3 : 1;
-	return 1;
-}
-
-static int stbi__jpeg_info(stbi__context* s, int* x, int* y, int* comp) {
-	int result;
-	stbi__jpeg* j = (stbi__jpeg*)(stbi__malloc(sizeof(stbi__jpeg)));
-	j->s = s;
-	result = stbi__jpeg_info_raw(j, x, y, comp);
-	STBI_FREE(j);
-	return result;
-}
-#endif
-
-// public domain zlib decode    v0.2  Sean Barrett 2006-11-18
-//    simple implementation
-//      - all input must be provided in an upfront buffer
-//      - all output is written to a single output buffer (can malloc/realloc)
-//    performance
-//      - fast huffman
-
-#ifndef STBI_NO_ZLIB
-
-// fast-way is faster to check than jpeg huffman, but slow way is slower
-#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables
-#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1)
-
-// zlib-style huffman encoding
-// (jpegs packs from left, zlib from right, so can't share code)
-typedef struct {
-	stbi__uint16 fast[1 << STBI__ZFAST_BITS];
-	stbi__uint16 firstcode[16];
-	int maxcode[17];
-	stbi__uint16 firstsymbol[16];
-	stbi_uc size[288];
-	stbi__uint16 value[288];
-} stbi__zhuffman;
-
-stbi_inline static int stbi__bitreverse16(int n) {
-	n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1);
-	n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2);
-	n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4);
-	n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8);
-	return n;
-}
-
-stbi_inline static int stbi__bit_reverse(int v, int bits) {
-	STBI_ASSERT(bits <= 16);
-	// to bit reverse n bits, reverse 16 and shift
-	// e.g. 11 bits, bit reverse and shift away 5
-	return stbi__bitreverse16(v) >> (16 - bits);
-}
-
-static int stbi__zbuild_huffman(stbi__zhuffman* z, const stbi_uc* sizelist, int num) {
-	int i, k = 0;
-	int code, next_code[16], sizes[17];
-
-	// DEFLATE spec for generating codes
-	memset(sizes, 0, sizeof(sizes));
-	memset(z->fast, 0, sizeof(z->fast));
-	for (i = 0; i < num; ++i)
-		++sizes[sizelist[i]];
-	sizes[0] = 0;
-	for (i = 1; i < 16; ++i)
-		if (sizes[i] > (1 << i))
-			return stbi__err("bad sizes", "Corrupt PNG");
-	code = 0;
-	for (i = 1; i < 16; ++i) {
-		next_code[i] = code;
-		z->firstcode[i] = (stbi__uint16)code;
-		z->firstsymbol[i] = (stbi__uint16)k;
-		code = (code + sizes[i]);
-		if (sizes[i])
-			if (code - 1 >= (1 << i))
-				return stbi__err("bad codelengths", "Corrupt PNG");
-		z->maxcode[i] = code << (16 - i); // preshift for inner loop
-		code <<= 1;
-		k += sizes[i];
-	}
-	z->maxcode[16] = 0x10000; // sentinel
-	for (i = 0; i < num; ++i) {
-		int s = sizelist[i];
-		if (s) {
-			int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
-			stbi__uint16 fastv = (stbi__uint16)((s << 9) | i);
-			z->size[c] = (stbi_uc)s;
-			z->value[c] = (stbi__uint16)i;
-			if (s <= STBI__ZFAST_BITS) {
-				int j = stbi__bit_reverse(next_code[s], s);
-				while (j < (1 << STBI__ZFAST_BITS)) {
-					z->fast[j] = fastv;
-					j += (1 << s);
-				}
-			}
-			++next_code[s];
-		}
-	}
-	return 1;
-}
-
-// zlib-from-memory implementation for PNG reading
-//    because PNG allows splitting the zlib stream arbitrarily,
-//    and it's annoying structurally to have PNG call ZLIB call PNG,
-//    we require PNG read all the IDATs and combine them into a single
-//    memory buffer
-
-typedef struct {
-	stbi_uc *zbuffer, *zbuffer_end;
-	int num_bits;
-	stbi__uint32 code_buffer;
-
-	char* zout;
-	char* zout_start;
-	char* zout_end;
-	int z_expandable;
-
-	stbi__zhuffman z_length, z_distance;
-} stbi__zbuf;
-
-stbi_inline static stbi_uc stbi__zget8(stbi__zbuf* z) {
-	if (z->zbuffer >= z->zbuffer_end)
-		return 0;
-	return *z->zbuffer++;
-}
-
-static void stbi__fill_bits(stbi__zbuf* z) {
-	do {
-		STBI_ASSERT(z->code_buffer < (1U << z->num_bits));
-		z->code_buffer |= (unsigned int)stbi__zget8(z) << z->num_bits;
-		z->num_bits += 8;
-	} while (z->num_bits <= 24);
-}
-
-stbi_inline static unsigned int stbi__zreceive(stbi__zbuf* z, int n) {
-	unsigned int k;
-	if (z->num_bits < n)
-		stbi__fill_bits(z);
-	k = z->code_buffer & ((1 << n) - 1);
-	z->code_buffer >>= n;
-	z->num_bits -= n;
-	return k;
-}
-
-static int stbi__zhuffman_decode_slowpath(stbi__zbuf* a, stbi__zhuffman* z) {
-	int b, s, k;
-	// not resolved by fast table, so compute it the slow way
-	// use jpeg approach, which requires MSbits at top
-	k = stbi__bit_reverse(a->code_buffer, 16);
-	for (s = STBI__ZFAST_BITS + 1;; ++s)
-		if (k < z->maxcode[s])
-			break;
-	if (s == 16)
-		return -1; // invalid code!
-	// code size is s, so:
-	b = (k >> (16 - s)) - z->firstcode[s] + z->firstsymbol[s];
-	STBI_ASSERT(z->size[b] == s);
-	a->code_buffer >>= s;
-	a->num_bits -= s;
-	return z->value[b];
-}
-
-stbi_inline static int stbi__zhuffman_decode(stbi__zbuf* a, stbi__zhuffman* z) {
-	int b, s;
-	if (a->num_bits < 16)
-		stbi__fill_bits(a);
-	b = z->fast[a->code_buffer & STBI__ZFAST_MASK];
-	if (b) {
-		s = b >> 9;
-		a->code_buffer >>= s;
-		a->num_bits -= s;
-		return b & 511;
-	}
-	return stbi__zhuffman_decode_slowpath(a, z);
-}
-
-static int stbi__zexpand(stbi__zbuf* z, char* zout,
-						 int n) // need to make room for n bytes
-{
-	char* q;
-	int cur, limit, old_limit;
-	z->zout = zout;
-	if (!z->z_expandable)
-		return stbi__err("output buffer limit", "Corrupt PNG");
-	cur = (int)(z->zout - z->zout_start);
-	limit = old_limit = (int)(z->zout_end - z->zout_start);
-	while (cur + n > limit)
-		limit *= 2;
-	q = (char*)STBI_REALLOC_SIZED(z->zout_start, old_limit, limit);
-	STBI_NOTUSED(old_limit);
-	if (q == NULL)
-		return stbi__err("outofmem", "Out of memory");
-	z->zout_start = q;
-	z->zout = q + cur;
-	z->zout_end = q + limit;
-	return 1;
-}
-
-static const int stbi__zlength_base[31] = {3,  4,  5,  6,  7,  8,  9,  10,  11,  13,  15,  17,  19,  23, 27, 31,
-										   35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0,  0};
-
-static const int stbi__zlength_extra[31] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 0, 0};
-
-static const int stbi__zdist_base[32] = {1,   2,   3,   4,   5,	7,	9,	13,   17,   25,   33,   49,	65,	97,	129, 193,
-										 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 0,   0};
-
-static const int stbi__zdist_extra[32] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
-
-static int stbi__parse_huffman_block(stbi__zbuf* a) {
-	char* zout = a->zout;
-	for (;;) {
-		int z = stbi__zhuffman_decode(a, &a->z_length);
-		if (z < 256) {
-			if (z < 0)
-				return stbi__err("bad huffman code",
-								 "Corrupt PNG"); // error in huffman codes
-			if (zout >= a->zout_end) {
-				if (!stbi__zexpand(a, zout, 1))
-					return 0;
-				zout = a->zout;
-			}
-			*zout++ = (char)z;
-		} else {
-			stbi_uc* p;
-			int len, dist;
-			if (z == 256) {
-				a->zout = zout;
-				return 1;
-			}
-			z -= 257;
-			len = stbi__zlength_base[z];
-			if (stbi__zlength_extra[z])
-				len += stbi__zreceive(a, stbi__zlength_extra[z]);
-			z = stbi__zhuffman_decode(a, &a->z_distance);
-			if (z < 0)
-				return stbi__err("bad huffman code", "Corrupt PNG");
-			dist = stbi__zdist_base[z];
-			if (stbi__zdist_extra[z])
-				dist += stbi__zreceive(a, stbi__zdist_extra[z]);
-			if (zout - a->zout_start < dist)
-				return stbi__err("bad dist", "Corrupt PNG");
-			if (zout + len > a->zout_end) {
-				if (!stbi__zexpand(a, zout, len))
-					return 0;
-				zout = a->zout;
-			}
-			p = (stbi_uc*)(zout - dist);
-			if (dist == 1) { // run of one byte; common in images.
-				stbi_uc v = *p;
-				if (len) {
-					do
-						*zout++ = v;
-					while (--len);
-				}
-			} else {
-				if (len) {
-					do
-						*zout++ = *p++;
-					while (--len);
-				}
-			}
-		}
-	}
-}
-
-static int stbi__compute_huffman_codes(stbi__zbuf* a) {
-	static const stbi_uc length_dezigzag[19] = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
-	stbi__zhuffman z_codelength;
-	stbi_uc lencodes[286 + 32 + 137]; // padding for maximum single op
-	stbi_uc codelength_sizes[19];
-	int i, n;
-
-	int hlit = stbi__zreceive(a, 5) + 257;
-	int hdist = stbi__zreceive(a, 5) + 1;
-	int hclen = stbi__zreceive(a, 4) + 4;
-	int ntot = hlit + hdist;
-
-	memset(codelength_sizes, 0, sizeof(codelength_sizes));
-	for (i = 0; i < hclen; ++i) {
-		int s = stbi__zreceive(a, 3);
-		codelength_sizes[length_dezigzag[i]] = (stbi_uc)s;
-	}
-	if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19))
-		return 0;
-
-	n = 0;
-	while (n < ntot) {
-		int c = stbi__zhuffman_decode(a, &z_codelength);
-		if (c < 0 || c >= 19)
-			return stbi__err("bad codelengths", "Corrupt PNG");
-		if (c < 16)
-			lencodes[n++] = (stbi_uc)c;
-		else {
-			stbi_uc fill = 0;
-			if (c == 16) {
-				c = stbi__zreceive(a, 2) + 3;
-				if (n == 0)
-					return stbi__err("bad codelengths", "Corrupt PNG");
-				fill = lencodes[n - 1];
-			} else if (c == 17)
-				c = stbi__zreceive(a, 3) + 3;
-			else {
-				STBI_ASSERT(c == 18);
-				c = stbi__zreceive(a, 7) + 11;
-			}
-			if (ntot - n < c)
-				return stbi__err("bad codelengths", "Corrupt PNG");
-			memset(lencodes + n, fill, c);
-			n += c;
-		}
-	}
-	if (n != ntot)
-		return stbi__err("bad codelengths", "Corrupt PNG");
-	if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit))
-		return 0;
-	if (!stbi__zbuild_huffman(&a->z_distance, lencodes + hlit, hdist))
-		return 0;
-	return 1;
-}
-
-static int stbi__parse_uncompressed_block(stbi__zbuf* a) {
-	stbi_uc header[4];
-	int len, nlen, k;
-	if (a->num_bits & 7)
-		stbi__zreceive(a, a->num_bits & 7); // discard
-	// drain the bit-packed data into header
-	k = 0;
-	while (a->num_bits > 0) {
-		header[k++] = (stbi_uc)(a->code_buffer & 255); // suppress MSVC run-time check
-		a->code_buffer >>= 8;
-		a->num_bits -= 8;
-	}
-	STBI_ASSERT(a->num_bits == 0);
-	// now fill header the normal way
-	while (k < 4)
-		header[k++] = stbi__zget8(a);
-	len = header[1] * 256 + header[0];
-	nlen = header[3] * 256 + header[2];
-	if (nlen != (len ^ 0xffff))
-		return stbi__err("zlib corrupt", "Corrupt PNG");
-	if (a->zbuffer + len > a->zbuffer_end)
-		return stbi__err("read past buffer", "Corrupt PNG");
-	if (a->zout + len > a->zout_end)
-		if (!stbi__zexpand(a, a->zout, len))
-			return 0;
-	memcpy(a->zout, a->zbuffer, len);
-	a->zbuffer += len;
-	a->zout += len;
-	return 1;
-}
-
-static int stbi__parse_zlib_header(stbi__zbuf* a) {
-	int cmf = stbi__zget8(a);
-	int cm = cmf & 15;
-	/* int cinfo = cmf >> 4; */
-	int flg = stbi__zget8(a);
-	if ((cmf * 256 + flg) % 31 != 0)
-		return stbi__err("bad zlib header", "Corrupt PNG"); // zlib spec
-	if (flg & 32)
-		return stbi__err("no preset dict",
-						 "Corrupt PNG"); // preset dictionary not allowed in png
-	if (cm != 8)
-		return stbi__err("bad compression",
-						 "Corrupt PNG"); // DEFLATE required for png
-	// window = 1 << (8 + cinfo)... but who cares, we fully buffer output
-	return 1;
-}
-
-static const stbi_uc stbi__zdefault_length[288] = {
-	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-	9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
-	9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
-	9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8};
-static const stbi_uc stbi__zdefault_distance[32] = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5};
-/*
-Init algorithm:
-{
-   int i;   // use <= to match clearly with spec
-   for (i=0; i <= 143; ++i)     stbi__zdefault_length[i]   = 8;
-   for (   ; i <= 255; ++i)     stbi__zdefault_length[i]   = 9;
-   for (   ; i <= 279; ++i)     stbi__zdefault_length[i]   = 7;
-   for (   ; i <= 287; ++i)     stbi__zdefault_length[i]   = 8;
-
-   for (i=0; i <=  31; ++i)     stbi__zdefault_distance[i] = 5;
-}
-*/
-
-static int stbi__parse_zlib(stbi__zbuf* a, int parse_header) {
-	int final, type;
-	if (parse_header)
-		if (!stbi__parse_zlib_header(a))
-			return 0;
-	a->num_bits = 0;
-	a->code_buffer = 0;
-	do {
-		final = stbi__zreceive(a, 1);
-		type = stbi__zreceive(a, 2);
-		if (type == 0) {
-			if (!stbi__parse_uncompressed_block(a))
-				return 0;
-		} else if (type == 3) {
-			return 0;
-		} else {
-			if (type == 1) {
-				// use fixed code lengths
-				if (!stbi__zbuild_huffman(&a->z_length, stbi__zdefault_length, 288))
-					return 0;
-				if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32))
-					return 0;
-			} else {
-				if (!stbi__compute_huffman_codes(a))
-					return 0;
-			}
-			if (!stbi__parse_huffman_block(a))
-				return 0;
-		}
-	} while (!final);
-	return 1;
-}
-
-static int stbi__do_zlib(stbi__zbuf* a, char* obuf, int olen, int exp, int parse_header) {
-	a->zout_start = obuf;
-	a->zout = obuf;
-	a->zout_end = obuf + olen;
-	a->z_expandable = exp;
-
-	return stbi__parse_zlib(a, parse_header);
-}
-
-STBIDEF char* stbi_zlib_decode_malloc_guesssize(const char* buffer, int len, int initial_size, int* outlen) {
-	stbi__zbuf a;
-	char* p = (char*)stbi__malloc(initial_size);
-	if (p == NULL)
-		return NULL;
-	a.zbuffer = (stbi_uc*)buffer;
-	a.zbuffer_end = (stbi_uc*)buffer + len;
-	if (stbi__do_zlib(&a, p, initial_size, 1, 1)) {
-		if (outlen)
-			*outlen = (int)(a.zout - a.zout_start);
-		return a.zout_start;
-	} else {
-		STBI_FREE(a.zout_start);
-		return NULL;
-	}
-}
-
-STBIDEF char* stbi_zlib_decode_malloc(char const* buffer, int len, int* outlen) { return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); }
-
-STBIDEF char* stbi_zlib_decode_malloc_guesssize_headerflag(const char* buffer, int len, int initial_size, int* outlen, int parse_header) {
-	stbi__zbuf a;
-	char* p = (char*)stbi__malloc(initial_size);
-	if (p == NULL)
-		return NULL;
-	a.zbuffer = (stbi_uc*)buffer;
-	a.zbuffer_end = (stbi_uc*)buffer + len;
-	if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) {
-		if (outlen)
-			*outlen = (int)(a.zout - a.zout_start);
-		return a.zout_start;
-	} else {
-		STBI_FREE(a.zout_start);
-		return NULL;
-	}
-}
-
-STBIDEF int stbi_zlib_decode_buffer(char* obuffer, int olen, char const* ibuffer, int ilen) {
-	stbi__zbuf a;
-	a.zbuffer = (stbi_uc*)ibuffer;
-	a.zbuffer_end = (stbi_uc*)ibuffer + ilen;
-	if (stbi__do_zlib(&a, obuffer, olen, 0, 1))
-		return (int)(a.zout - a.zout_start);
-	else
-		return -1;
-}
-
-STBIDEF char* stbi_zlib_decode_noheader_malloc(char const* buffer, int len, int* outlen) {
-	stbi__zbuf a;
-	char* p = (char*)stbi__malloc(16384);
-	if (p == NULL)
-		return NULL;
-	a.zbuffer = (stbi_uc*)buffer;
-	a.zbuffer_end = (stbi_uc*)buffer + len;
-	if (stbi__do_zlib(&a, p, 16384, 1, 0)) {
-		if (outlen)
-			*outlen = (int)(a.zout - a.zout_start);
-		return a.zout_start;
-	} else {
-		STBI_FREE(a.zout_start);
-		return NULL;
-	}
-}
-
-STBIDEF int stbi_zlib_decode_noheader_buffer(char* obuffer, int olen, const char* ibuffer, int ilen) {
-	stbi__zbuf a;
-	a.zbuffer = (stbi_uc*)ibuffer;
-	a.zbuffer_end = (stbi_uc*)ibuffer + ilen;
-	if (stbi__do_zlib(&a, obuffer, olen, 0, 0))
-		return (int)(a.zout - a.zout_start);
-	else
-		return -1;
-}
-#endif
-
-// public domain "baseline" PNG decoder   v0.10  Sean Barrett 2006-11-18
-//    simple implementation
-//      - only 8-bit samples
-//      - no CRC checking
-//      - allocates lots of intermediate memory
-//        - avoids problem of streaming data between subsystems
-//        - avoids explicit window management
-//    performance
-//      - uses stb_zlib, a PD zlib implementation with fast huffman decoding
-
-#ifndef STBI_NO_PNG
-typedef struct {
-	stbi__uint32 length;
-	stbi__uint32 type;
-} stbi__pngchunk;
-
-static stbi__pngchunk stbi__get_chunk_header(stbi__context* s) {
-	stbi__pngchunk c;
-	c.length = stbi__get32be(s);
-	c.type = stbi__get32be(s);
-	return c;
-}
-
-static int stbi__check_png_header(stbi__context* s) {
-	static const stbi_uc png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
-	int i;
-	for (i = 0; i < 8; ++i)
-		if (stbi__get8(s) != png_sig[i])
-			return stbi__err("bad png sig", "Not a PNG");
-	return 1;
-}
-
-typedef struct {
-	stbi__context* s;
-	stbi_uc *idata, *expanded, *out;
-	int depth;
-} stbi__png;
-
-enum {
-	STBI__F_none = 0,
-	STBI__F_sub = 1,
-	STBI__F_up = 2,
-	STBI__F_avg = 3,
-	STBI__F_paeth = 4,
-	// synthetic filters used for first scanline to avoid needing a dummy row of
-	// 0s
-	STBI__F_avg_first,
-	STBI__F_paeth_first
-};
-
-static stbi_uc first_row_filter[5] = {STBI__F_none, STBI__F_sub, STBI__F_none, STBI__F_avg_first, STBI__F_paeth_first};
-
-static int stbi__paeth(int a, int b, int c) {
-	int p = a + b - c;
-	int pa = abs(p - a);
-	int pb = abs(p - b);
-	int pc = abs(p - c);
-	if (pa <= pb && pa <= pc)
-		return a;
-	if (pb <= pc)
-		return b;
-	return c;
-}
-
-static const stbi_uc stbi__depth_scale_table[9] = {0, 0xff, 0x55, 0, 0x11, 0, 0, 0, 0x01};
-
-// create the png data from post-deflated data
-static int stbi__create_png_image_raw(stbi__png* a, stbi_uc* raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color) {
-	int bytes = (depth == 16 ? 2 : 1);
-	stbi__context* s = a->s;
-	stbi__uint32 i, j, stride = x * out_n * bytes;
-	stbi__uint32 img_len, img_width_bytes;
-	int k;
-	int img_n = s->img_n; // copy it into a local for later
-
-	int output_bytes = out_n * bytes;
-	int filter_bytes = img_n * bytes;
-	int width = x;
-
-	STBI_ASSERT(out_n == s->img_n || out_n == s->img_n + 1);
-	a->out = (stbi_uc*)stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into
-	if (!a->out)
-		return stbi__err("outofmem", "Out of memory");
-
-	if (!stbi__mad3sizes_valid(img_n, x, depth, 7))
-		return stbi__err("too large", "Corrupt PNG");
-	img_width_bytes = (((img_n * x * depth) + 7) >> 3);
-	img_len = (img_width_bytes + 1) * y;
-
-	// we used to check for exact match between raw_len and img_len on
-	// non-interlaced PNGs, but issue #276 reported a PNG in the wild that had
-	// extra data at the end (all zeros), so just check for raw_len < img_len
-	// always.
-	if (raw_len < img_len)
-		return stbi__err("not enough pixels", "Corrupt PNG");
-
-	for (j = 0; j < y; ++j) {
-		stbi_uc* cur = a->out + stride * j;
-		stbi_uc* prior;
-		int filter = *raw++;
-
-		if (filter > 4)
-			return stbi__err("invalid filter", "Corrupt PNG");
-
-		if (depth < 8) {
-			STBI_ASSERT(img_width_bytes <= x);
-			cur += x * out_n - img_width_bytes; // store output to the rightmost img_len
-												// bytes, so we can decode in place
-			filter_bytes = 1;
-			width = img_width_bytes;
-		}
-		prior = cur - stride; // bugfix: need to compute this after 'cur +='
-							  // computation above
-
-		// if first row, use special filter that doesn't sample previous row
-		if (j == 0)
-			filter = first_row_filter[filter];
-
-		// handle first byte explicitly
-		for (k = 0; k < filter_bytes; ++k) {
-			switch (filter) {
-			case STBI__F_none:
-				cur[k] = raw[k];
-				break;
-			case STBI__F_sub:
-				cur[k] = raw[k];
-				break;
-			case STBI__F_up:
-				cur[k] = STBI__BYTECAST(raw[k] + prior[k]);
-				break;
-			case STBI__F_avg:
-				cur[k] = STBI__BYTECAST(raw[k] + (prior[k] >> 1));
-				break;
-			case STBI__F_paeth:
-				cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0, prior[k], 0));
-				break;
-			case STBI__F_avg_first:
-				cur[k] = raw[k];
-				break;
-			case STBI__F_paeth_first:
-				cur[k] = raw[k];
-				break;
-			}
-		}
-
-		if (depth == 8) {
-			if (img_n != out_n)
-				cur[img_n] = 255; // first pixel
-			raw += img_n;
-			cur += out_n;
-			prior += out_n;
-		} else if (depth == 16) {
-			if (img_n != out_n) {
-				cur[filter_bytes] = 255;	 // first pixel top byte
-				cur[filter_bytes + 1] = 255; // first pixel bottom byte
-			}
-			raw += filter_bytes;
-			cur += output_bytes;
-			prior += output_bytes;
-		} else {
-			raw += 1;
-			cur += 1;
-			prior += 1;
-		}
-
-		// this is a little gross, so that we don't switch per-pixel or
-		// per-component
-		if (depth < 8 || img_n == out_n) {
-			int nk = (width - 1) * filter_bytes;
-#define STBI__CASE(f)                                                                                                                                          \
-	case f:                                                                                                                                                    \
-		for (k = 0; k < nk; ++k)
-			switch (filter) {
-			// "none" filter turns into a memcpy here; make that explicit.
-			case STBI__F_none:
-				memcpy(cur, raw, nk);
-				break;
-				STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - filter_bytes]); }
-				break;
-				STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); }
-				break;
-				STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - filter_bytes]) >> 1)); }
-				break;
-				STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], prior[k], prior[k - filter_bytes])); }
-				break;
-				STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - filter_bytes] >> 1)); }
-				break;
-				STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], 0, 0)); }
-				break;
-			}
-#undef STBI__CASE
-			raw += nk;
-		} else {
-			STBI_ASSERT(img_n + 1 == out_n);
-#define STBI__CASE(f)                                                                                                                                          \
-	case f:                                                                                                                                                    \
-		for (i = x - 1; i >= 1; --i, cur[filter_bytes] = 255, raw += filter_bytes, cur += output_bytes, prior += output_bytes)                                 \
-			for (k = 0; k < filter_bytes; ++k)
-			switch (filter) {
-				STBI__CASE(STBI__F_none) { cur[k] = raw[k]; }
-				break;
-				STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - output_bytes]); }
-				break;
-				STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); }
-				break;
-				STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - output_bytes]) >> 1)); }
-				break;
-				STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], prior[k], prior[k - output_bytes])); }
-				break;
-				STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - output_bytes] >> 1)); }
-				break;
-				STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], 0, 0)); }
-				break;
-			}
-#undef STBI__CASE
-
-			// the loop above sets the high byte of the pixels' alpha, but for
-			// 16 bit png files we also need the low byte set. we'll do that
-			// here.
-			if (depth == 16) {
-				cur = a->out + stride * j; // start at the beginning of the row again
-				for (i = 0; i < x; ++i, cur += output_bytes) {
-					cur[filter_bytes + 1] = 255;
-				}
-			}
-		}
-	}
-
-	// we make a separate pass to expand bits to pixels; for performance,
-	// this could run two scanlines behind the above code, so it won't
-	// intefere with filtering but will still be in the cache.
-	if (depth < 8) {
-		for (j = 0; j < y; ++j) {
-			stbi_uc* cur = a->out + stride * j;
-			stbi_uc* in = a->out + stride * j + x * out_n - img_width_bytes;
-			// unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the
-			// common 8-bit path optimal at minimal cost for 1/2/4-bit png
-			// guarante byte alignment, if width is not multiple of 8/4/2 we'll
-			// decode dummy trailing data that will be skipped in the later loop
-			stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range
-
-			// note that the final byte might overshoot and write more data than
-			// desired. we can allocate enough data that this never writes out
-			// of memory, but it could also overwrite the next scanline. can it
-			// overwrite non-empty data on the next scanline? yes, consider
-			// 1-pixel-wide scanlines with 1-bit-per-pixel. so we need to
-			// explicitly clamp the final ones
-
-			if (depth == 4) {
-				for (k = x * img_n; k >= 2; k -= 2, ++in) {
-					*cur++ = scale * ((*in >> 4));
-					*cur++ = scale * ((*in) & 0x0f);
-				}
-				if (k > 0)
-					*cur++ = scale * ((*in >> 4));
-			} else if (depth == 2) {
-				for (k = x * img_n; k >= 4; k -= 4, ++in) {
-					*cur++ = scale * ((*in >> 6));
-					*cur++ = scale * ((*in >> 4) & 0x03);
-					*cur++ = scale * ((*in >> 2) & 0x03);
-					*cur++ = scale * ((*in) & 0x03);
-				}
-				if (k > 0)
-					*cur++ = scale * ((*in >> 6));
-				if (k > 1)
-					*cur++ = scale * ((*in >> 4) & 0x03);
-				if (k > 2)
-					*cur++ = scale * ((*in >> 2) & 0x03);
-			} else if (depth == 1) {
-				for (k = x * img_n; k >= 8; k -= 8, ++in) {
-					*cur++ = scale * ((*in >> 7));
-					*cur++ = scale * ((*in >> 6) & 0x01);
-					*cur++ = scale * ((*in >> 5) & 0x01);
-					*cur++ = scale * ((*in >> 4) & 0x01);
-					*cur++ = scale * ((*in >> 3) & 0x01);
-					*cur++ = scale * ((*in >> 2) & 0x01);
-					*cur++ = scale * ((*in >> 1) & 0x01);
-					*cur++ = scale * ((*in) & 0x01);
-				}
-				if (k > 0)
-					*cur++ = scale * ((*in >> 7));
-				if (k > 1)
-					*cur++ = scale * ((*in >> 6) & 0x01);
-				if (k > 2)
-					*cur++ = scale * ((*in >> 5) & 0x01);
-				if (k > 3)
-					*cur++ = scale * ((*in >> 4) & 0x01);
-				if (k > 4)
-					*cur++ = scale * ((*in >> 3) & 0x01);
-				if (k > 5)
-					*cur++ = scale * ((*in >> 2) & 0x01);
-				if (k > 6)
-					*cur++ = scale * ((*in >> 1) & 0x01);
-			}
-			if (img_n != out_n) {
-				int q;
-				// insert alpha = 255
-				cur = a->out + stride * j;
-				if (img_n == 1) {
-					for (q = x - 1; q >= 0; --q) {
-						cur[q * 2 + 1] = 255;
-						cur[q * 2 + 0] = cur[q];
-					}
-				} else {
-					STBI_ASSERT(img_n == 3);
-					for (q = x - 1; q >= 0; --q) {
-						cur[q * 4 + 3] = 255;
-						cur[q * 4 + 2] = cur[q * 3 + 2];
-						cur[q * 4 + 1] = cur[q * 3 + 1];
-						cur[q * 4 + 0] = cur[q * 3 + 0];
-					}
-				}
-			}
-		}
-	} else if (depth == 16) {
-		// force the image data from big-endian to platform-native.
-		// this is done in a separate pass due to the decoding relying
-		// on the data being untouched, but could probably be done
-		// per-line during decode if care is taken.
-		stbi_uc* cur = a->out;
-		stbi__uint16* cur16 = (stbi__uint16*)cur;
-
-		for (i = 0; i < x * y * out_n; ++i, cur16++, cur += 2) {
-			*cur16 = (cur[0] << 8) | cur[1];
-		}
-	}
-
-	return 1;
-}
-
-static int stbi__create_png_image(stbi__png* a, stbi_uc* image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced) {
-	int bytes = (depth == 16 ? 2 : 1);
-	int out_bytes = out_n * bytes;
-	stbi_uc* final;
-	int p;
-	if (!interlaced)
-		return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color);
-
-	// de-interlacing
-	final = (stbi_uc*)stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0);
-	for (p = 0; p < 7; ++p) {
-		int xorig[] = {0, 4, 0, 2, 0, 1, 0};
-		int yorig[] = {0, 0, 4, 0, 2, 0, 1};
-		int xspc[] = {8, 8, 4, 4, 2, 2, 1};
-		int yspc[] = {8, 8, 8, 4, 4, 2, 2};
-		int i, j, x, y;
-		// pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1
-		x = (a->s->img_x - xorig[p] + xspc[p] - 1) / xspc[p];
-		y = (a->s->img_y - yorig[p] + yspc[p] - 1) / yspc[p];
-		if (x && y) {
-			stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y;
-			if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) {
-				STBI_FREE(final);
-				return 0;
-			}
-			for (j = 0; j < y; ++j) {
-				for (i = 0; i < x; ++i) {
-					int out_y = j * yspc[p] + yorig[p];
-					int out_x = i * xspc[p] + xorig[p];
-					memcpy(final + out_y * a->s->img_x * out_bytes + out_x * out_bytes, a->out + (j * x + i) * out_bytes, out_bytes);
-				}
-			}
-			STBI_FREE(a->out);
-			image_data += img_len;
-			image_data_len -= img_len;
-		}
-	}
-	a->out = final;
-
-	return 1;
-}
-
-static int stbi__compute_transparency(stbi__png* z, stbi_uc tc[3], int out_n) {
-	stbi__context* s = z->s;
-	stbi__uint32 i, pixel_count = s->img_x * s->img_y;
-	stbi_uc* p = z->out;
-
-	// compute color-based transparency, assuming we've
-	// already got 255 as the alpha value in the output
-	STBI_ASSERT(out_n == 2 || out_n == 4);
-
-	if (out_n == 2) {
-		for (i = 0; i < pixel_count; ++i) {
-			p[1] = (p[0] == tc[0] ? 0 : 255);
-			p += 2;
-		}
-	} else {
-		for (i = 0; i < pixel_count; ++i) {
-			if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
-				p[3] = 0;
-			p += 4;
-		}
-	}
-	return 1;
-}
-
-static int stbi__compute_transparency16(stbi__png* z, stbi__uint16 tc[3], int out_n) {
-	stbi__context* s = z->s;
-	stbi__uint32 i, pixel_count = s->img_x * s->img_y;
-	stbi__uint16* p = (stbi__uint16*)z->out;
-
-	// compute color-based transparency, assuming we've
-	// already got 65535 as the alpha value in the output
-	STBI_ASSERT(out_n == 2 || out_n == 4);
-
-	if (out_n == 2) {
-		for (i = 0; i < pixel_count; ++i) {
-			p[1] = (p[0] == tc[0] ? 0 : 65535);
-			p += 2;
-		}
-	} else {
-		for (i = 0; i < pixel_count; ++i) {
-			if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
-				p[3] = 0;
-			p += 4;
-		}
-	}
-	return 1;
-}
-
-static int stbi__expand_png_palette(stbi__png* a, stbi_uc* palette, int len, int pal_img_n) {
-	stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y;
-	stbi_uc *p, *temp_out, *orig = a->out;
-
-	p = (stbi_uc*)stbi__malloc_mad2(pixel_count, pal_img_n, 0);
-	if (p == NULL)
-		return stbi__err("outofmem", "Out of memory");
-
-	// between here and free(out) below, exitting would leak
-	temp_out = p;
-
-	if (pal_img_n == 3) {
-		for (i = 0; i < pixel_count; ++i) {
-			int n = orig[i] * 4;
-			p[0] = palette[n];
-			p[1] = palette[n + 1];
-			p[2] = palette[n + 2];
-			p += 3;
-		}
-	} else {
-		for (i = 0; i < pixel_count; ++i) {
-			int n = orig[i] * 4;
-			p[0] = palette[n];
-			p[1] = palette[n + 1];
-			p[2] = palette[n + 2];
-			p[3] = palette[n + 3];
-			p += 4;
-		}
-	}
-	STBI_FREE(a->out);
-	a->out = temp_out;
-
-	STBI_NOTUSED(len);
-
-	return 1;
-}
-
-static int stbi__unpremultiply_on_load = 0;
-static int stbi__de_iphone_flag = 0;
-
-STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) { stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply; }
-
-STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) { stbi__de_iphone_flag = flag_true_if_should_convert; }
-
-static void stbi__de_iphone(stbi__png* z) {
-	stbi__context* s = z->s;
-	stbi__uint32 i, pixel_count = s->img_x * s->img_y;
-	stbi_uc* p = z->out;
-
-	if (s->img_out_n == 3) { // convert bgr to rgb
-		for (i = 0; i < pixel_count; ++i) {
-			stbi_uc t = p[0];
-			p[0] = p[2];
-			p[2] = t;
-			p += 3;
-		}
-	} else {
-		STBI_ASSERT(s->img_out_n == 4);
-		if (stbi__unpremultiply_on_load) {
-			// convert bgr to rgb and unpremultiply
-			for (i = 0; i < pixel_count; ++i) {
-				stbi_uc a = p[3];
-				stbi_uc t = p[0];
-				if (a) {
-					stbi_uc half = a / 2;
-					p[0] = (p[2] * 255 + half) / a;
-					p[1] = (p[1] * 255 + half) / a;
-					p[2] = (t * 255 + half) / a;
-				} else {
-					p[0] = p[2];
-					p[2] = t;
-				}
-				p += 4;
-			}
-		} else {
-			// convert bgr to rgb
-			for (i = 0; i < pixel_count; ++i) {
-				stbi_uc t = p[0];
-				p[0] = p[2];
-				p[2] = t;
-				p += 4;
-			}
-		}
-	}
-}
-
-#define STBI__PNG_TYPE(a, b, c, d) (((unsigned)(a) << 24) + ((unsigned)(b) << 16) + ((unsigned)(c) << 8) + (unsigned)(d))
-
-static int stbi__parse_png_file(stbi__png* z, int scan, int req_comp) {
-	stbi_uc palette[1024], pal_img_n = 0;
-	stbi_uc has_trans = 0, tc[3] = {0};
-	stbi__uint16 tc16[3];
-	stbi__uint32 ioff = 0, idata_limit = 0, i, pal_len = 0;
-	int first = 1, k, interlace = 0, color = 0, is_iphone = 0;
-	stbi__context* s = z->s;
-
-	z->expanded = NULL;
-	z->idata = NULL;
-	z->out = NULL;
-
-	if (!stbi__check_png_header(s))
-		return 0;
-
-	if (scan == STBI__SCAN_type)
-		return 1;
-
-	for (;;) {
-		stbi__pngchunk c = stbi__get_chunk_header(s);
-		switch (c.type) {
-		case STBI__PNG_TYPE('C', 'g', 'B', 'I'):
-			is_iphone = 1;
-			stbi__skip(s, c.length);
-			break;
-		case STBI__PNG_TYPE('I', 'H', 'D', 'R'): {
-			int comp, filter;
-			if (!first)
-				return stbi__err("multiple IHDR", "Corrupt PNG");
-			first = 0;
-			if (c.length != 13)
-				return stbi__err("bad IHDR len", "Corrupt PNG");
-			s->img_x = stbi__get32be(s);
-			if (s->img_x > (1 << 24))
-				return stbi__err("too large", "Very large image (corrupt?)");
-			s->img_y = stbi__get32be(s);
-			if (s->img_y > (1 << 24))
-				return stbi__err("too large", "Very large image (corrupt?)");
-			z->depth = stbi__get8(s);
-			if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16)
-				return stbi__err("1/2/4/8/16-bit only", "PNG not supported: 1/2/4/8/16-bit only");
-			color = stbi__get8(s);
-			if (color > 6)
-				return stbi__err("bad ctype", "Corrupt PNG");
-			if (color == 3 && z->depth == 16)
-				return stbi__err("bad ctype", "Corrupt PNG");
-			if (color == 3)
-				pal_img_n = 3;
-			else if (color & 1)
-				return stbi__err("bad ctype", "Corrupt PNG");
-			comp = stbi__get8(s);
-			if (comp)
-				return stbi__err("bad comp method", "Corrupt PNG");
-			filter = stbi__get8(s);
-			if (filter)
-				return stbi__err("bad filter method", "Corrupt PNG");
-			interlace = stbi__get8(s);
-			if (interlace > 1)
-				return stbi__err("bad interlace method", "Corrupt PNG");
-			if (!s->img_x || !s->img_y)
-				return stbi__err("0-pixel image", "Corrupt PNG");
-			if (!pal_img_n) {
-				s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
-				if ((1 << 30) / s->img_x / s->img_n < s->img_y)
-					return stbi__err("too large", "Image too large to decode");
-				if (scan == STBI__SCAN_header)
-					return 1;
-			} else {
-				// if paletted, then pal_n is our final components, and
-				// img_n is # components to decompress/filter.
-				s->img_n = 1;
-				if ((1 << 30) / s->img_x / 4 < s->img_y)
-					return stbi__err("too large", "Corrupt PNG");
-				// if SCAN_header, have to scan to see if we have a tRNS
-			}
-			break;
-		}
-
-		case STBI__PNG_TYPE('P', 'L', 'T', 'E'): {
-			if (first)
-				return stbi__err("first not IHDR", "Corrupt PNG");
-			if (c.length > 256 * 3)
-				return stbi__err("invalid PLTE", "Corrupt PNG");
-			pal_len = c.length / 3;
-			if (pal_len * 3 != c.length)
-				return stbi__err("invalid PLTE", "Corrupt PNG");
-			for (i = 0; i < pal_len; ++i) {
-				palette[i * 4 + 0] = stbi__get8(s);
-				palette[i * 4 + 1] = stbi__get8(s);
-				palette[i * 4 + 2] = stbi__get8(s);
-				palette[i * 4 + 3] = 255;
-			}
-			break;
-		}
-
-		case STBI__PNG_TYPE('t', 'R', 'N', 'S'): {
-			if (first)
-				return stbi__err("first not IHDR", "Corrupt PNG");
-			if (z->idata)
-				return stbi__err("tRNS after IDAT", "Corrupt PNG");
-			if (pal_img_n) {
-				if (scan == STBI__SCAN_header) {
-					s->img_n = 4;
-					return 1;
-				}
-				if (pal_len == 0)
-					return stbi__err("tRNS before PLTE", "Corrupt PNG");
-				if (c.length > pal_len)
-					return stbi__err("bad tRNS len", "Corrupt PNG");
-				pal_img_n = 4;
-				for (i = 0; i < c.length; ++i)
-					palette[i * 4 + 3] = stbi__get8(s);
-			} else {
-				if (!(s->img_n & 1))
-					return stbi__err("tRNS with alpha", "Corrupt PNG");
-				if (c.length != (stbi__uint32)s->img_n * 2)
-					return stbi__err("bad tRNS len", "Corrupt PNG");
-				has_trans = 1;
-				if (z->depth == 16) {
-					for (k = 0; k < s->img_n; ++k)
-						tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
-				} else {
-					for (k = 0; k < s->img_n; ++k)
-						tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit
-																									   // images will be
-																									   // larger
-				}
-			}
-			break;
-		}
-
-		case STBI__PNG_TYPE('I', 'D', 'A', 'T'): {
-			if (first)
-				return stbi__err("first not IHDR", "Corrupt PNG");
-			if (pal_img_n && !pal_len)
-				return stbi__err("no PLTE", "Corrupt PNG");
-			if (scan == STBI__SCAN_header) {
-				s->img_n = pal_img_n;
-				return 1;
-			}
-			if ((int)(ioff + c.length) < (int)ioff)
-				return 0;
-			if (ioff + c.length > idata_limit) {
-				stbi__uint32 idata_limit_old = idata_limit;
-				stbi_uc* p;
-				if (idata_limit == 0)
-					idata_limit = c.length > 4096 ? c.length : 4096;
-				while (ioff + c.length > idata_limit)
-					idata_limit *= 2;
-				STBI_NOTUSED(idata_limit_old);
-				p = (stbi_uc*)STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit);
-				if (p == NULL)
-					return stbi__err("outofmem", "Out of memory");
-				z->idata = p;
-			}
-			if (!stbi__getn(s, z->idata + ioff, c.length))
-				return stbi__err("outofdata", "Corrupt PNG");
-			ioff += c.length;
-			break;
-		}
-
-		case STBI__PNG_TYPE('I', 'E', 'N', 'D'): {
-			stbi__uint32 raw_len, bpl;
-			if (first)
-				return stbi__err("first not IHDR", "Corrupt PNG");
-			if (scan != STBI__SCAN_load)
-				return 1;
-			if (z->idata == NULL)
-				return stbi__err("no IDAT", "Corrupt PNG");
-			// initial guess for decoded data size to avoid unnecessary reallocs
-			bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component
-			raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */;
-			z->expanded = (stbi_uc*)stbi_zlib_decode_malloc_guesssize_headerflag((char*)z->idata, ioff, raw_len, (int*)&raw_len, !is_iphone);
-			if (z->expanded == NULL)
-				return 0; // zlib should set error
-			STBI_FREE(z->idata);
-			z->idata = NULL;
-			if ((req_comp == s->img_n + 1 && req_comp != 3 && !pal_img_n) || has_trans)
-				s->img_out_n = s->img_n + 1;
-			else
-				s->img_out_n = s->img_n;
-			if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace))
-				return 0;
-			if (has_trans) {
-				if (z->depth == 16) {
-					if (!stbi__compute_transparency16(z, tc16, s->img_out_n))
-						return 0;
-				} else {
-					if (!stbi__compute_transparency(z, tc, s->img_out_n))
-						return 0;
-				}
-			}
-			if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2)
-				stbi__de_iphone(z);
-			if (pal_img_n) {
-				// pal_img_n == 3 or 4
-				s->img_n = pal_img_n; // record the actual colors we had
-				s->img_out_n = pal_img_n;
-				if (req_comp >= 3)
-					s->img_out_n = req_comp;
-				if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n))
-					return 0;
-			} else if (has_trans) {
-				// non-paletted image with tRNS -> source image has (constant)
-				// alpha
-				++s->img_n;
-			}
-			STBI_FREE(z->expanded);
-			z->expanded = NULL;
-			// end of PNG chunk, read and skip CRC
-			stbi__get32be(s);
-			return 1;
-		}
-
-		default:
-			// if critical, fail
-			if (first)
-				return stbi__err("first not IHDR", "Corrupt PNG");
-			if ((c.type & (1 << 29)) == 0) {
-#ifndef STBI_NO_FAILURE_STRINGS
-				// not threadsafe
-				static char invalid_chunk[] = "XXXX PNG chunk not known";
-				invalid_chunk[0] = STBI__BYTECAST(c.type >> 24);
-				invalid_chunk[1] = STBI__BYTECAST(c.type >> 16);
-				invalid_chunk[2] = STBI__BYTECAST(c.type >> 8);
-				invalid_chunk[3] = STBI__BYTECAST(c.type >> 0);
-#endif
-				return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type");
-			}
-			stbi__skip(s, c.length);
-			break;
-		}
-		// end of PNG chunk, read and skip CRC
-		stbi__get32be(s);
-	}
-}
-
-static void* stbi__do_png(stbi__png* p, int* x, int* y, int* n, int req_comp, stbi__result_info* ri) {
-	void* result = NULL;
-	if (req_comp < 0 || req_comp > 4)
-		return stbi__errpuc("bad req_comp", "Internal error");
-	if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) {
-		if (p->depth < 8)
-			ri->bits_per_channel = 8;
-		else
-			ri->bits_per_channel = p->depth;
-		result = p->out;
-		p->out = NULL;
-		if (req_comp && req_comp != p->s->img_out_n) {
-			if (ri->bits_per_channel == 8)
-				result = stbi__convert_format((unsigned char*)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
-			else
-				result = stbi__convert_format16((stbi__uint16*)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
-			p->s->img_out_n = req_comp;
-			if (result == NULL)
-				return result;
-		}
-		*x = p->s->img_x;
-		*y = p->s->img_y;
-		if (n)
-			*n = p->s->img_n;
-	}
-	STBI_FREE(p->out);
-	p->out = NULL;
-	STBI_FREE(p->expanded);
-	p->expanded = NULL;
-	STBI_FREE(p->idata);
-	p->idata = NULL;
-
-	return result;
-}
-
-static void* stbi__png_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
-	stbi__png p;
-	p.s = s;
-	return stbi__do_png(&p, x, y, comp, req_comp, ri);
-}
-
-static int stbi__png_test(stbi__context* s) {
-	int r;
-	r = stbi__check_png_header(s);
-	stbi__rewind(s);
-	return r;
-}
-
-static int stbi__png_info_raw(stbi__png* p, int* x, int* y, int* comp) {
-	if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) {
-		stbi__rewind(p->s);
-		return 0;
-	}
-	if (x)
-		*x = p->s->img_x;
-	if (y)
-		*y = p->s->img_y;
-	if (comp)
-		*comp = p->s->img_n;
-	return 1;
-}
-
-static int stbi__png_info(stbi__context* s, int* x, int* y, int* comp) {
-	stbi__png p;
-	p.s = s;
-	return stbi__png_info_raw(&p, x, y, comp);
-}
-
-static int stbi__png_is16(stbi__context* s) {
-	stbi__png p;
-	p.s = s;
-	if (!stbi__png_info_raw(&p, NULL, NULL, NULL))
-		return 0;
-	if (p.depth != 16) {
-		stbi__rewind(p.s);
-		return 0;
-	}
-	return 1;
-}
-#endif
-
-// Microsoft/Windows BMP image
-
-#ifndef STBI_NO_BMP
-static int stbi__bmp_test_raw(stbi__context* s) {
-	int r;
-	int sz;
-	if (stbi__get8(s) != 'B')
-		return 0;
-	if (stbi__get8(s) != 'M')
-		return 0;
-	stbi__get32le(s); // discard filesize
-	stbi__get16le(s); // discard reserved
-	stbi__get16le(s); // discard reserved
-	stbi__get32le(s); // discard data offset
-	sz = stbi__get32le(s);
-	r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124);
-	return r;
-}
-
-static int stbi__bmp_test(stbi__context* s) {
-	int r = stbi__bmp_test_raw(s);
-	stbi__rewind(s);
-	return r;
-}
-
-// returns 0..31 for the highest set bit
-static int stbi__high_bit(unsigned int z) {
-	int n = 0;
-	if (z == 0)
-		return -1;
-	if (z >= 0x10000) {
-		n += 16;
-		z >>= 16;
-	}
-	if (z >= 0x00100) {
-		n += 8;
-		z >>= 8;
-	}
-	if (z >= 0x00010) {
-		n += 4;
-		z >>= 4;
-	}
-	if (z >= 0x00004) {
-		n += 2;
-		z >>= 2;
-	}
-	if (z >= 0x00002) {
-		n += 1; /* >>=  1;*/
-	}
-	return n;
-}
-
-static int stbi__bitcount(unsigned int a) {
-	a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2
-	a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4
-	a = (a + (a >> 4)) & 0x0f0f0f0f;				// max 8 per 4, now 8 bits
-	a = (a + (a >> 8));								// max 16 per 8 bits
-	a = (a + (a >> 16));							// max 32 per 8 bits
-	return a & 0xff;
-}
-
-// extract an arbitrarily-aligned N-bit value (N=bits)
-// from v, and then make it 8-bits long and fractionally
-// extend it to full full range.
-static int stbi__shiftsigned(unsigned int v, int shift, int bits) {
-	static unsigned int mul_table[9] = {
-		0,
-		0xff /*0b11111111*/,
-		0x55 /*0b01010101*/,
-		0x49 /*0b01001001*/,
-		0x11 /*0b00010001*/,
-		0x21 /*0b00100001*/,
-		0x41 /*0b01000001*/,
-		0x81 /*0b10000001*/,
-		0x01 /*0b00000001*/,
-	};
-	static unsigned int shift_table[9] = {
-		0, 0, 0, 1, 0, 2, 4, 6, 0,
-	};
-	if (shift < 0)
-		v <<= -shift;
-	else
-		v >>= shift;
-	STBI_ASSERT(v < 256);
-	v >>= (8 - bits);
-	STBI_ASSERT(bits >= 0 && bits <= 8);
-	return (int)((unsigned)v * mul_table[bits]) >> shift_table[bits];
-}
-
-typedef struct {
-	int bpp, offset, hsz;
-	unsigned int mr, mg, mb, ma, all_a;
-	int extra_read;
-} stbi__bmp_data;
-
-static void* stbi__bmp_parse_header(stbi__context* s, stbi__bmp_data* info) {
-	int hsz;
-	if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M')
-		return stbi__errpuc("not BMP", "Corrupt BMP");
-	stbi__get32le(s); // discard filesize
-	stbi__get16le(s); // discard reserved
-	stbi__get16le(s); // discard reserved
-	info->offset = stbi__get32le(s);
-	info->hsz = hsz = stbi__get32le(s);
-	info->mr = info->mg = info->mb = info->ma = 0;
-	info->extra_read = 14;
-
-	if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124)
-		return stbi__errpuc("unknown BMP", "BMP type not supported: unknown");
-	if (hsz == 12) {
-		s->img_x = stbi__get16le(s);
-		s->img_y = stbi__get16le(s);
-	} else {
-		s->img_x = stbi__get32le(s);
-		s->img_y = stbi__get32le(s);
-	}
-	if (stbi__get16le(s) != 1)
-		return stbi__errpuc("bad BMP", "bad BMP");
-	info->bpp = stbi__get16le(s);
-	if (hsz != 12) {
-		int compress = stbi__get32le(s);
-		if (compress == 1 || compress == 2)
-			return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
-		stbi__get32le(s); // discard sizeof
-		stbi__get32le(s); // discard hres
-		stbi__get32le(s); // discard vres
-		stbi__get32le(s); // discard colorsused
-		stbi__get32le(s); // discard max important
-		if (hsz == 40 || hsz == 56) {
-			if (hsz == 56) {
-				stbi__get32le(s);
-				stbi__get32le(s);
-				stbi__get32le(s);
-				stbi__get32le(s);
-			}
-			if (info->bpp == 16 || info->bpp == 32) {
-				if (compress == 0) {
-					if (info->bpp == 32) {
-						info->mr = 0xffu << 16;
-						info->mg = 0xffu << 8;
-						info->mb = 0xffu << 0;
-						info->ma = 0xffu << 24;
-						info->all_a = 0; // if all_a is 0 at end, then we loaded
-										 // alpha channel but it was all 0
-					} else {
-						info->mr = 31u << 10;
-						info->mg = 31u << 5;
-						info->mb = 31u << 0;
-					}
-				} else if (compress == 3) {
-					info->mr = stbi__get32le(s);
-					info->mg = stbi__get32le(s);
-					info->mb = stbi__get32le(s);
-					info->extra_read += 12;
-					// not documented, but generated by photoshop and handled by
-					// mspaint
-					if (info->mr == info->mg && info->mg == info->mb) {
-						// ?!?!?
-						return stbi__errpuc("bad BMP", "bad BMP");
-					}
-				} else
-					return stbi__errpuc("bad BMP", "bad BMP");
-			}
-		} else {
-			int i;
-			if (hsz != 108 && hsz != 124)
-				return stbi__errpuc("bad BMP", "bad BMP");
-			info->mr = stbi__get32le(s);
-			info->mg = stbi__get32le(s);
-			info->mb = stbi__get32le(s);
-			info->ma = stbi__get32le(s);
-			stbi__get32le(s); // discard color space
-			for (i = 0; i < 12; ++i)
-				stbi__get32le(s); // discard color space parameters
-			if (hsz == 124) {
-				stbi__get32le(s); // discard rendering intent
-				stbi__get32le(s); // discard offset of profile data
-				stbi__get32le(s); // discard size of profile data
-				stbi__get32le(s); // discard reserved
-			}
-		}
-	}
-	return (void*)1;
-}
-
-static void* stbi__bmp_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
-	stbi_uc* out;
-	unsigned int mr = 0, mg = 0, mb = 0, ma = 0, all_a;
-	stbi_uc pal[256][4];
-	int psize = 0, i, j, width;
-	int flip_vertically, pad, target;
-	stbi__bmp_data info;
-	STBI_NOTUSED(ri);
-
-	info.all_a = 255;
-	if (stbi__bmp_parse_header(s, &info) == NULL)
-		return NULL; // error code already set
-
-	flip_vertically = ((int)s->img_y) > 0;
-	s->img_y = abs((int)s->img_y);
-
-	mr = info.mr;
-	mg = info.mg;
-	mb = info.mb;
-	ma = info.ma;
-	all_a = info.all_a;
-
-	if (info.hsz == 12) {
-		if (info.bpp < 24)
-			psize = (info.offset - info.extra_read - 24) / 3;
-	} else {
-		if (info.bpp < 16)
-			psize = (info.offset - info.extra_read - info.hsz) >> 2;
-	}
-	if (psize == 0) {
-		STBI_ASSERT(info.offset == (s->img_buffer - s->buffer_start));
-	}
-
-	if (info.bpp == 24 && ma == 0xff000000)
-		s->img_n = 3;
-	else
-		s->img_n = ma ? 4 : 3;
-	if (req_comp && req_comp >= 3) // we can directly decode 3 or 4
-		target = req_comp;
-	else
-		target = s->img_n; // if they want monochrome, we'll post-convert
-
-	// sanity-check size
-	if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0))
-		return stbi__errpuc("too large", "Corrupt BMP");
-
-	out = (stbi_uc*)stbi__malloc_mad3(target, s->img_x, s->img_y, 0);
-	if (!out)
-		return stbi__errpuc("outofmem", "Out of memory");
-	if (info.bpp < 16) {
-		int z = 0;
-		if (psize == 0 || psize > 256) {
-			STBI_FREE(out);
-			return stbi__errpuc("invalid", "Corrupt BMP");
-		}
-		for (i = 0; i < psize; ++i) {
-			pal[i][2] = stbi__get8(s);
-			pal[i][1] = stbi__get8(s);
-			pal[i][0] = stbi__get8(s);
-			if (info.hsz != 12)
-				stbi__get8(s);
-			pal[i][3] = 255;
-		}
-		stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4));
-		if (info.bpp == 1)
-			width = (s->img_x + 7) >> 3;
-		else if (info.bpp == 4)
-			width = (s->img_x + 1) >> 1;
-		else if (info.bpp == 8)
-			width = s->img_x;
-		else {
-			STBI_FREE(out);
-			return stbi__errpuc("bad bpp", "Corrupt BMP");
-		}
-		pad = (-width) & 3;
-		if (info.bpp == 1) {
-			for (j = 0; j < (int)s->img_y; ++j) {
-				int bit_offset = 7, v = stbi__get8(s);
-				for (i = 0; i < (int)s->img_x; ++i) {
-					int color = (v >> bit_offset) & 0x1;
-					out[z++] = pal[color][0];
-					out[z++] = pal[color][1];
-					out[z++] = pal[color][2];
-					if (target == 4)
-						out[z++] = 255;
-					if (i + 1 == (int)s->img_x)
-						break;
-					if ((--bit_offset) < 0) {
-						bit_offset = 7;
-						v = stbi__get8(s);
-					}
-				}
-				stbi__skip(s, pad);
-			}
-		} else {
-			for (j = 0; j < (int)s->img_y; ++j) {
-				for (i = 0; i < (int)s->img_x; i += 2) {
-					int v = stbi__get8(s), v2 = 0;
-					if (info.bpp == 4) {
-						v2 = v & 15;
-						v >>= 4;
-					}
-					out[z++] = pal[v][0];
-					out[z++] = pal[v][1];
-					out[z++] = pal[v][2];
-					if (target == 4)
-						out[z++] = 255;
-					if (i + 1 == (int)s->img_x)
-						break;
-					v = (info.bpp == 8) ? stbi__get8(s) : v2;
-					out[z++] = pal[v][0];
-					out[z++] = pal[v][1];
-					out[z++] = pal[v][2];
-					if (target == 4)
-						out[z++] = 255;
-				}
-				stbi__skip(s, pad);
-			}
-		}
-	} else {
-		int rshift = 0, gshift = 0, bshift = 0, ashift = 0, rcount = 0, gcount = 0, bcount = 0, acount = 0;
-		int z = 0;
-		int easy = 0;
-		stbi__skip(s, info.offset - info.extra_read - info.hsz);
-		if (info.bpp == 24)
-			width = 3 * s->img_x;
-		else if (info.bpp == 16)
-			width = 2 * s->img_x;
-		else /* bpp = 32 and pad = 0 */
-			width = 0;
-		pad = (-width) & 3;
-		if (info.bpp == 24) {
-			easy = 1;
-		} else if (info.bpp == 32) {
-			if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000)
-				easy = 2;
-		}
-		if (!easy) {
-			if (!mr || !mg || !mb) {
-				STBI_FREE(out);
-				return stbi__errpuc("bad masks", "Corrupt BMP");
-			}
-			// right shift amt to put high bit in position #7
-			rshift = stbi__high_bit(mr) - 7;
-			rcount = stbi__bitcount(mr);
-			gshift = stbi__high_bit(mg) - 7;
-			gcount = stbi__bitcount(mg);
-			bshift = stbi__high_bit(mb) - 7;
-			bcount = stbi__bitcount(mb);
-			ashift = stbi__high_bit(ma) - 7;
-			acount = stbi__bitcount(ma);
-		}
-		for (j = 0; j < (int)s->img_y; ++j) {
-			if (easy) {
-				for (i = 0; i < (int)s->img_x; ++i) {
-					unsigned char a;
-					out[z + 2] = stbi__get8(s);
-					out[z + 1] = stbi__get8(s);
-					out[z + 0] = stbi__get8(s);
-					z += 3;
-					a = (easy == 2 ? stbi__get8(s) : 255);
-					all_a |= a;
-					if (target == 4)
-						out[z++] = a;
-				}
-			} else {
-				int bpp = info.bpp;
-				for (i = 0; i < (int)s->img_x; ++i) {
-					stbi__uint32 v = (bpp == 16 ? (stbi__uint32)stbi__get16le(s) : stbi__get32le(s));
-					unsigned int a;
-					out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount));
-					out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount));
-					out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount));
-					a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
-					all_a |= a;
-					if (target == 4)
-						out[z++] = STBI__BYTECAST(a);
-				}
-			}
-			stbi__skip(s, pad);
-		}
-	}
-
-	// if alpha channel is all 0s, replace with all 255s
-	if (target == 4 && all_a == 0)
-		for (i = 4 * s->img_x * s->img_y - 1; i >= 0; i -= 4)
-			out[i] = 255;
-
-	if (flip_vertically) {
-		stbi_uc t;
-		for (j = 0; j<(int)s->img_y>> 1; ++j) {
-			stbi_uc* p1 = out + j * s->img_x * target;
-			stbi_uc* p2 = out + (s->img_y - 1 - j) * s->img_x * target;
-			for (i = 0; i < (int)s->img_x * target; ++i) {
-				t = p1[i];
-				p1[i] = p2[i];
-				p2[i] = t;
-			}
-		}
-	}
-
-	if (req_comp && req_comp != target) {
-		out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y);
-		if (out == NULL)
-			return out; // stbi__convert_format frees input on failure
-	}
-
-	*x = s->img_x;
-	*y = s->img_y;
-	if (comp)
-		*comp = s->img_n;
-	return out;
-}
-#endif
-
-// Targa Truevision - TGA
-// by Jonathan Dummer
-#ifndef STBI_NO_TGA
-// returns STBI_rgb or whatever, 0 on error
-static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16) {
-	// only RGB or RGBA (incl. 16bit) or grey allowed
-	if (is_rgb16)
-		*is_rgb16 = 0;
-	switch (bits_per_pixel) {
-	case 8:
-		return STBI_grey;
-	case 16:
-		if (is_grey)
-			return STBI_grey_alpha;
-		// fallthrough
-	case 15:
-		if (is_rgb16)
-			*is_rgb16 = 1;
-		return STBI_rgb;
-	case 24: // fallthrough
-	case 32:
-		return bits_per_pixel / 8;
-	default:
-		return 0;
-	}
-}
-
-static int stbi__tga_info(stbi__context* s, int* x, int* y, int* comp) {
-	int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp;
-	int sz, tga_colormap_type;
-	stbi__get8(s);					   // discard Offset
-	tga_colormap_type = stbi__get8(s); // colormap type
-	if (tga_colormap_type > 1) {
-		stbi__rewind(s);
-		return 0; // only RGB or indexed allowed
-	}
-	tga_image_type = stbi__get8(s); // image type
-	if (tga_colormap_type == 1) {   // colormapped (paletted) image
-		if (tga_image_type != 1 && tga_image_type != 9) {
-			stbi__rewind(s);
-			return 0;
-		}
-		stbi__skip(s,
-				   4);		// skip index of first colormap entry and number of entries
-		sz = stbi__get8(s); //   check bits per palette color entry
-		if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) {
-			stbi__rewind(s);
-			return 0;
-		}
-		stbi__skip(s, 4); // skip image x and y origin
-		tga_colormap_bpp = sz;
-	} else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE
-		if ((tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11)) {
-			stbi__rewind(s);
-			return 0; // only RGB or grey allowed, +/- RLE
-		}
-		stbi__skip(s, 9); // skip colormap specification and image x/y origin
-		tga_colormap_bpp = 0;
-	}
-	tga_w = stbi__get16le(s);
-	if (tga_w < 1) {
-		stbi__rewind(s);
-		return 0; // test width
-	}
-	tga_h = stbi__get16le(s);
-	if (tga_h < 1) {
-		stbi__rewind(s);
-		return 0; // test height
-	}
-	tga_bits_per_pixel = stbi__get8(s); // bits per pixel
-	stbi__get8(s);						// ignore alpha bits
-	if (tga_colormap_bpp != 0) {
-		if ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) {
-			// when using a colormap, tga_bits_per_pixel is the size of the
-			// indexes I don't think anything but 8 or 16bit indexes makes sense
-			stbi__rewind(s);
-			return 0;
-		}
-		tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL);
-	} else {
-		tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL);
-	}
-	if (!tga_comp) {
-		stbi__rewind(s);
-		return 0;
-	}
-	if (x)
-		*x = tga_w;
-	if (y)
-		*y = tga_h;
-	if (comp)
-		*comp = tga_comp;
-	return 1; // seems to have passed everything
-}
-
-static int stbi__tga_test(stbi__context* s) {
-	int res = 0;
-	int sz, tga_color_type;
-	stbi__get8(s);					//   discard Offset
-	tga_color_type = stbi__get8(s); //   color type
-	if (tga_color_type > 1)
-		goto errorEnd;		   //   only RGB or indexed allowed
-	sz = stbi__get8(s);		   //   image type
-	if (tga_color_type == 1) { // colormapped (paletted) image
-		if (sz != 1 && sz != 9)
-			goto errorEnd; // colortype 1 demands image type 1 or 9
-		stbi__skip(s,
-				   4);		// skip index of first colormap entry and number of entries
-		sz = stbi__get8(s); //   check bits per palette color entry
-		if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32))
-			goto errorEnd;
-		stbi__skip(s, 4); // skip image x and y origin
-	} else {			  // "normal" image w/o colormap
-		if ((sz != 2) && (sz != 3) && (sz != 10) && (sz != 11))
-			goto errorEnd; // only RGB or grey allowed, +/- RLE
-		stbi__skip(s, 9);  // skip colormap specification and image x/y origin
-	}
-	if (stbi__get16le(s) < 1)
-		goto errorEnd; //   test width
-	if (stbi__get16le(s) < 1)
-		goto errorEnd;  //   test height
-	sz = stbi__get8(s); //   bits per pixel
-	if ((tga_color_type == 1) && (sz != 8) && (sz != 16))
-		goto errorEnd; // for colormapped images, bpp is size of an index
-	if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32))
-		goto errorEnd;
-
-	res = 1; // if we got this far, everything's good and we can return 1
-			 // instead of 0
-
-errorEnd:
-	stbi__rewind(s);
-	return res;
-}
-
-// read 16bit value and convert to 24bit RGB
-static void stbi__tga_read_rgb16(stbi__context* s, stbi_uc* out) {
-	stbi__uint16 px = (stbi__uint16)stbi__get16le(s);
-	stbi__uint16 fiveBitMask = 31;
-	// we have 3 channels with 5bits each
-	int r = (px >> 10) & fiveBitMask;
-	int g = (px >> 5) & fiveBitMask;
-	int b = px & fiveBitMask;
-	// Note that this saves the data in RGB(A) order, so it doesn't need to be
-	// swapped later
-	out[0] = (stbi_uc)((r * 255) / 31);
-	out[1] = (stbi_uc)((g * 255) / 31);
-	out[2] = (stbi_uc)((b * 255) / 31);
-
-	// some people claim that the most significant bit might be used for alpha
-	// (possibly if an alpha-bit is set in the "image descriptor byte")
-	// but that only made 16bit test images completely translucent..
-	// so let's treat all 15 and 16bit TGAs as RGB with no alpha.
-}
-
-static void* stbi__tga_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
-	//   read in the TGA header stuff
-	int tga_offset = stbi__get8(s);
-	int tga_indexed = stbi__get8(s);
-	int tga_image_type = stbi__get8(s);
-	int tga_is_RLE = 0;
-	int tga_palette_start = stbi__get16le(s);
-	int tga_palette_len = stbi__get16le(s);
-	int tga_palette_bits = stbi__get8(s);
-	int tga_x_origin = stbi__get16le(s);
-	int tga_y_origin = stbi__get16le(s);
-	int tga_width = stbi__get16le(s);
-	int tga_height = stbi__get16le(s);
-	int tga_bits_per_pixel = stbi__get8(s);
-	int tga_comp, tga_rgb16 = 0;
-	int tga_inverted = stbi__get8(s);
-	// int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused
-	// (useless?)
-	//   image data
-	unsigned char* tga_data;
-	unsigned char* tga_palette = NULL;
-	int i, j;
-	unsigned char raw_data[4] = {0};
-	int RLE_count = 0;
-	int RLE_repeating = 0;
-	int read_next_pixel = 1;
-	STBI_NOTUSED(ri);
-	STBI_NOTUSED(tga_x_origin); // @TODO
-	STBI_NOTUSED(tga_y_origin); // @TODO
-
-	//   do a tiny bit of precessing
-	if (tga_image_type >= 8) {
-		tga_image_type -= 8;
-		tga_is_RLE = 1;
-	}
-	tga_inverted = 1 - ((tga_inverted >> 5) & 1);
-
-	//   If I'm paletted, then I'll use the number of bits from the palette
-	if (tga_indexed)
-		tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
-	else
-		tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16);
-
-	if (!tga_comp) // shouldn't really happen, stbi__tga_test() should have
-				   // ensured basic consistency
-		return stbi__errpuc("bad format", "Can't find out TGA pixelformat");
-
-	//   tga info
-	*x = tga_width;
-	*y = tga_height;
-	if (comp)
-		*comp = tga_comp;
-
-	if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0))
-		return stbi__errpuc("too large", "Corrupt TGA");
-
-	tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
-	if (!tga_data)
-		return stbi__errpuc("outofmem", "Out of memory");
-
-	// skip to the data's starting position (offset usually = 0)
-	stbi__skip(s, tga_offset);
-
-	if (!tga_indexed && !tga_is_RLE && !tga_rgb16) {
-		for (i = 0; i < tga_height; ++i) {
-			int row = tga_inverted ? tga_height - i - 1 : i;
-			stbi_uc* tga_row = tga_data + row * tga_width * tga_comp;
-			stbi__getn(s, tga_row, tga_width * tga_comp);
-		}
-	} else {
-		//   do I need to load a palette?
-		if (tga_indexed) {
-			//   any data to skip? (offset usually = 0)
-			stbi__skip(s, tga_palette_start);
-			//   load the palette
-			tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
-			if (!tga_palette) {
-				STBI_FREE(tga_data);
-				return stbi__errpuc("outofmem", "Out of memory");
-			}
-			if (tga_rgb16) {
-				stbi_uc* pal_entry = tga_palette;
-				STBI_ASSERT(tga_comp == STBI_rgb);
-				for (i = 0; i < tga_palette_len; ++i) {
-					stbi__tga_read_rgb16(s, pal_entry);
-					pal_entry += tga_comp;
-				}
-			} else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) {
-				STBI_FREE(tga_data);
-				STBI_FREE(tga_palette);
-				return stbi__errpuc("bad palette", "Corrupt TGA");
-			}
-		}
-		//   load the data
-		for (i = 0; i < tga_width * tga_height; ++i) {
-			//   if I'm in RLE mode, do I need to get a RLE stbi__pngchunk?
-			if (tga_is_RLE) {
-				if (RLE_count == 0) {
-					//   yep, get the next byte as a RLE command
-					int RLE_cmd = stbi__get8(s);
-					RLE_count = 1 + (RLE_cmd & 127);
-					RLE_repeating = RLE_cmd >> 7;
-					read_next_pixel = 1;
-				} else if (!RLE_repeating) {
-					read_next_pixel = 1;
-				}
-			} else {
-				read_next_pixel = 1;
-			}
-			//   OK, if I need to read a pixel, do it now
-			if (read_next_pixel) {
-				//   load however much data we did have
-				if (tga_indexed) {
-					// read in index, then perform the lookup
-					int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s);
-					if (pal_idx >= tga_palette_len) {
-						// invalid index
-						pal_idx = 0;
-					}
-					pal_idx *= tga_comp;
-					for (j = 0; j < tga_comp; ++j) {
-						raw_data[j] = tga_palette[pal_idx + j];
-					}
-				} else if (tga_rgb16) {
-					STBI_ASSERT(tga_comp == STBI_rgb);
-					stbi__tga_read_rgb16(s, raw_data);
-				} else {
-					//   read in the data raw
-					for (j = 0; j < tga_comp; ++j) {
-						raw_data[j] = stbi__get8(s);
-					}
-				}
-				//   clear the reading flag for the next pixel
-				read_next_pixel = 0;
-			} // end of reading a pixel
-
-			// copy data
-			for (j = 0; j < tga_comp; ++j)
-				tga_data[i * tga_comp + j] = raw_data[j];
-
-			//   in case we're in RLE mode, keep counting down
-			--RLE_count;
-		}
-		//   do I need to invert the image?
-		if (tga_inverted) {
-			for (j = 0; j * 2 < tga_height; ++j) {
-				int index1 = j * tga_width * tga_comp;
-				int index2 = (tga_height - 1 - j) * tga_width * tga_comp;
-				for (i = tga_width * tga_comp; i > 0; --i) {
-					unsigned char temp = tga_data[index1];
-					tga_data[index1] = tga_data[index2];
-					tga_data[index2] = temp;
-					++index1;
-					++index2;
-				}
-			}
-		}
-		//   clear my palette, if I had one
-		if (tga_palette != NULL) {
-			STBI_FREE(tga_palette);
-		}
-	}
-
-	// swap RGB - if the source data was RGB16, it already is in the right order
-	if (tga_comp >= 3 && !tga_rgb16) {
-		unsigned char* tga_pixel = tga_data;
-		for (i = 0; i < tga_width * tga_height; ++i) {
-			unsigned char temp = tga_pixel[0];
-			tga_pixel[0] = tga_pixel[2];
-			tga_pixel[2] = temp;
-			tga_pixel += tga_comp;
-		}
-	}
-
-	// convert to target component count
-	if (req_comp && req_comp != tga_comp)
-		tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height);
-
-	//   the things I do to get rid of an error message, and yet keep
-	//   Microsoft's C compilers happy... [8^(
-	tga_palette_start = tga_palette_len = tga_palette_bits = tga_x_origin = tga_y_origin = 0;
-	STBI_NOTUSED(tga_palette_start);
-	//   OK, done
-	return tga_data;
-}
-#endif
-
-// *************************************************************************************************
-// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz,
-// tweaked by STB
-
-#ifndef STBI_NO_PSD
-static int stbi__psd_test(stbi__context* s) {
-	int r = (stbi__get32be(s) == 0x38425053);
-	stbi__rewind(s);
-	return r;
-}
-
-static int stbi__psd_decode_rle(stbi__context* s, stbi_uc* p, int pixelCount) {
-	int count, nleft, len;
-
-	count = 0;
-	while ((nleft = pixelCount - count) > 0) {
-		len = stbi__get8(s);
-		if (len == 128) {
-			// No-op.
-		} else if (len < 128) {
-			// Copy next len+1 bytes literally.
-			len++;
-			if (len > nleft)
-				return 0; // corrupt data
-			count += len;
-			while (len) {
-				*p = stbi__get8(s);
-				p += 4;
-				len--;
-			}
-		} else if (len > 128) {
-			stbi_uc val;
-			// Next -len+1 bytes in the dest are replicated from next source
-			// byte. (Interpret len as a negative 8-bit int.)
-			len = 257 - len;
-			if (len > nleft)
-				return 0; // corrupt data
-			val = stbi__get8(s);
-			count += len;
-			while (len) {
-				*p = val;
-				p += 4;
-				len--;
-			}
-		}
-	}
-
-	return 1;
-}
-
-static void* stbi__psd_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc) {
-	int pixelCount;
-	int channelCount, compression;
-	int channel, i;
-	int bitdepth;
-	int w, h;
-	stbi_uc* out;
-	STBI_NOTUSED(ri);
-
-	// Check identifier
-	if (stbi__get32be(s) != 0x38425053) // "8BPS"
-		return stbi__errpuc("not PSD", "Corrupt PSD image");
-
-	// Check file type version.
-	if (stbi__get16be(s) != 1)
-		return stbi__errpuc("wrong version", "Unsupported version of PSD image");
-
-	// Skip 6 reserved bytes.
-	stbi__skip(s, 6);
-
-	// Read the number of channels (R, G, B, A, etc).
-	channelCount = stbi__get16be(s);
-	if (channelCount < 0 || channelCount > 16)
-		return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image");
-
-	// Read the rows and columns of the image.
-	h = stbi__get32be(s);
-	w = stbi__get32be(s);
-
-	// Make sure the depth is 8 bits.
-	bitdepth = stbi__get16be(s);
-	if (bitdepth != 8 && bitdepth != 16)
-		return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit");
-
-	// Make sure the color mode is RGB.
-	// Valid options are:
-	//   0: Bitmap
-	//   1: Grayscale
-	//   2: Indexed color
-	//   3: RGB color
-	//   4: CMYK color
-	//   7: Multichannel
-	//   8: Duotone
-	//   9: Lab color
-	if (stbi__get16be(s) != 3)
-		return stbi__errpuc("wrong color format", "PSD is not in RGB color format");
-
-	// Skip the Mode Data.  (It's the palette for indexed color; other info for
-	// other modes.)
-	stbi__skip(s, stbi__get32be(s));
-
-	// Skip the image resources.  (resolution, pen tool paths, etc)
-	stbi__skip(s, stbi__get32be(s));
-
-	// Skip the reserved data.
-	stbi__skip(s, stbi__get32be(s));
-
-	// Find out if the data is compressed.
-	// Known values:
-	//   0: no compression
-	//   1: RLE compressed
-	compression = stbi__get16be(s);
-	if (compression > 1)
-		return stbi__errpuc("bad compression", "PSD has an unknown compression format");
-
-	// Check size
-	if (!stbi__mad3sizes_valid(4, w, h, 0))
-		return stbi__errpuc("too large", "Corrupt PSD");
-
-	// Create the destination image.
-
-	if (!compression && bitdepth == 16 && bpc == 16) {
-		out = (stbi_uc*)stbi__malloc_mad3(8, w, h, 0);
-		ri->bits_per_channel = 16;
-	} else
-		out = (stbi_uc*)stbi__malloc(4 * w * h);
-
-	if (!out)
-		return stbi__errpuc("outofmem", "Out of memory");
-	pixelCount = w * h;
-
-	// Initialize the data to zero.
-	// memset( out, 0, pixelCount * 4 );
-
-	// Finally, the image data.
-	if (compression) {
-		// RLE as used by .PSD and .TIFF
-		// Loop until you get the number of unpacked bytes you are expecting:
-		//     Read the next source byte into n.
-		//     If n is between 0 and 127 inclusive, copy the next n+1 bytes
-		//     literally. Else if n is between -127 and -1 inclusive, copy the
-		//     next byte -n+1 times. Else if n is 128, noop.
-		// Endloop
-
-		// The RLE-compressed data is preceded by a 2-byte data count for each
-		// row in the data, which we're going to just skip.
-		stbi__skip(s, h * channelCount * 2);
-
-		// Read the RLE data by channel.
-		for (channel = 0; channel < 4; channel++) {
-			stbi_uc* p;
-
-			p = out + channel;
-			if (channel >= channelCount) {
-				// Fill this channel with default data.
-				for (i = 0; i < pixelCount; i++, p += 4)
-					*p = (channel == 3 ? 255 : 0);
-			} else {
-				// Read the RLE data.
-				if (!stbi__psd_decode_rle(s, p, pixelCount)) {
-					STBI_FREE(out);
-					return stbi__errpuc("corrupt", "bad RLE data");
-				}
-			}
-		}
-
-	} else {
-		// We're at the raw image data.  It's each channel in order (Red, Green,
-		// Blue, Alpha, ...) where each channel consists of an 8-bit (or 16-bit)
-		// value for each pixel in the image.
-
-		// Read the data by channel.
-		for (channel = 0; channel < 4; channel++) {
-			if (channel >= channelCount) {
-				// Fill this channel with default data.
-				if (bitdepth == 16 && bpc == 16) {
-					stbi__uint16* q = ((stbi__uint16*)out) + channel;
-					stbi__uint16 val = channel == 3 ? 65535 : 0;
-					for (i = 0; i < pixelCount; i++, q += 4)
-						*q = val;
-				} else {
-					stbi_uc* p = out + channel;
-					stbi_uc val = channel == 3 ? 255 : 0;
-					for (i = 0; i < pixelCount; i++, p += 4)
-						*p = val;
-				}
-			} else {
-				if (ri->bits_per_channel == 16) { // output bpc
-					stbi__uint16* q = ((stbi__uint16*)out) + channel;
-					for (i = 0; i < pixelCount; i++, q += 4)
-						*q = (stbi__uint16)stbi__get16be(s);
-				} else {
-					stbi_uc* p = out + channel;
-					if (bitdepth == 16) { // input bpc
-						for (i = 0; i < pixelCount; i++, p += 4)
-							*p = (stbi_uc)(stbi__get16be(s) >> 8);
-					} else {
-						for (i = 0; i < pixelCount; i++, p += 4)
-							*p = stbi__get8(s);
-					}
-				}
-			}
-		}
-	}
-
-	// remove weird white matte from PSD
-	if (channelCount >= 4) {
-		if (ri->bits_per_channel == 16) {
-			for (i = 0; i < w * h; ++i) {
-				stbi__uint16* pixel = (stbi__uint16*)out + 4 * i;
-				if (pixel[3] != 0 && pixel[3] != 65535) {
-					float a = pixel[3] / 65535.0f;
-					float ra = 1.0f / a;
-					float inv_a = 65535.0f * (1 - ra);
-					pixel[0] = (stbi__uint16)(pixel[0] * ra + inv_a);
-					pixel[1] = (stbi__uint16)(pixel[1] * ra + inv_a);
-					pixel[2] = (stbi__uint16)(pixel[2] * ra + inv_a);
-				}
-			}
-		} else {
-			for (i = 0; i < w * h; ++i) {
-				unsigned char* pixel = out + 4 * i;
-				if (pixel[3] != 0 && pixel[3] != 255) {
-					float a = pixel[3] / 255.0f;
-					float ra = 1.0f / a;
-					float inv_a = 255.0f * (1 - ra);
-					pixel[0] = (unsigned char)(pixel[0] * ra + inv_a);
-					pixel[1] = (unsigned char)(pixel[1] * ra + inv_a);
-					pixel[2] = (unsigned char)(pixel[2] * ra + inv_a);
-				}
-			}
-		}
-	}
-
-	// convert to desired output format
-	if (req_comp && req_comp != 4) {
-		if (ri->bits_per_channel == 16)
-			out = (stbi_uc*)stbi__convert_format16((stbi__uint16*)out, 4, req_comp, w, h);
-		else
-			out = stbi__convert_format(out, 4, req_comp, w, h);
-		if (out == NULL)
-			return out; // stbi__convert_format frees input on failure
-	}
-
-	if (comp)
-		*comp = 4;
-	*y = h;
-	*x = w;
-
-	return out;
-}
-#endif
-
-// *************************************************************************************************
-// Softimage PIC loader
-// by Tom Seddon
-//
-// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format
-// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/
-
-#ifndef STBI_NO_PIC
-static int stbi__pic_is4(stbi__context* s, const char* str) {
-	int i;
-	for (i = 0; i < 4; ++i)
-		if (stbi__get8(s) != (stbi_uc)str[i])
-			return 0;
-
-	return 1;
-}
-
-static int stbi__pic_test_core(stbi__context* s) {
-	int i;
-
-	if (!stbi__pic_is4(s, "\x53\x80\xF6\x34"))
-		return 0;
-
-	for (i = 0; i < 84; ++i)
-		stbi__get8(s);
-
-	if (!stbi__pic_is4(s, "PICT"))
-		return 0;
-
-	return 1;
-}
-
-typedef struct {
-	stbi_uc size, type, channel;
-} stbi__pic_packet;
-
-static stbi_uc* stbi__readval(stbi__context* s, int channel, stbi_uc* dest) {
-	int mask = 0x80, i;
-
-	for (i = 0; i < 4; ++i, mask >>= 1) {
-		if (channel & mask) {
-			if (stbi__at_eof(s))
-				return stbi__errpuc("bad file", "PIC file too short");
-			dest[i] = stbi__get8(s);
-		}
-	}
-
-	return dest;
-}
-
-static void stbi__copyval(int channel, stbi_uc* dest, const stbi_uc* src) {
-	int mask = 0x80, i;
-
-	for (i = 0; i < 4; ++i, mask >>= 1)
-		if (channel & mask)
-			dest[i] = src[i];
-}
-
-static stbi_uc* stbi__pic_load_core(stbi__context* s, int width, int height, int* comp, stbi_uc* result) {
-	int act_comp = 0, num_packets = 0, y, chained;
-	stbi__pic_packet packets[10];
-
-	// this will (should...) cater for even some bizarre stuff like having data
-	// for the same channel in multiple packets.
-	do {
-		stbi__pic_packet* packet;
-
-		if (num_packets == sizeof(packets) / sizeof(packets[0]))
-			return stbi__errpuc("bad format", "too many packets");
-
-		packet = &packets[num_packets++];
-
-		chained = stbi__get8(s);
-		packet->size = stbi__get8(s);
-		packet->type = stbi__get8(s);
-		packet->channel = stbi__get8(s);
-
-		act_comp |= packet->channel;
-
-		if (stbi__at_eof(s))
-			return stbi__errpuc("bad file", "file too short (reading packets)");
-		if (packet->size != 8)
-			return stbi__errpuc("bad format", "packet isn't 8bpp");
-	} while (chained);
-
-	*comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel?
-
-	for (y = 0; y < height; ++y) {
-		int packet_idx;
-
-		for (packet_idx = 0; packet_idx < num_packets; ++packet_idx) {
-			stbi__pic_packet* packet = &packets[packet_idx];
-			stbi_uc* dest = result + y * width * 4;
-
-			switch (packet->type) {
-			default:
-				return stbi__errpuc("bad format", "packet has bad compression type");
-
-			case 0: { // uncompressed
-				int x;
-
-				for (x = 0; x < width; ++x, dest += 4)
-					if (!stbi__readval(s, packet->channel, dest))
-						return 0;
-				break;
-			}
-
-			case 1: // Pure RLE
-			{
-				int left = width, i;
-
-				while (left > 0) {
-					stbi_uc count, value[4];
-
-					count = stbi__get8(s);
-					if (stbi__at_eof(s))
-						return stbi__errpuc("bad file", "file too short (pure read count)");
-
-					if (count > left)
-						count = (stbi_uc)left;
-
-					if (!stbi__readval(s, packet->channel, value))
-						return 0;
-
-					for (i = 0; i < count; ++i, dest += 4)
-						stbi__copyval(packet->channel, dest, value);
-					left -= count;
-				}
-			} break;
-
-			case 2: { // Mixed RLE
-				int left = width;
-				while (left > 0) {
-					int count = stbi__get8(s), i;
-					if (stbi__at_eof(s))
-						return stbi__errpuc("bad file", "file too short (mixed read count)");
-
-					if (count >= 128) { // Repeated
-						stbi_uc value[4];
-
-						if (count == 128)
-							count = stbi__get16be(s);
-						else
-							count -= 127;
-						if (count > left)
-							return stbi__errpuc("bad file", "scanline overrun");
-
-						if (!stbi__readval(s, packet->channel, value))
-							return 0;
-
-						for (i = 0; i < count; ++i, dest += 4)
-							stbi__copyval(packet->channel, dest, value);
-					} else { // Raw
-						++count;
-						if (count > left)
-							return stbi__errpuc("bad file", "scanline overrun");
-
-						for (i = 0; i < count; ++i, dest += 4)
-							if (!stbi__readval(s, packet->channel, dest))
-								return 0;
-					}
-					left -= count;
-				}
-				break;
-			}
-			}
-		}
-	}
-
-	return result;
-}
-
-static void* stbi__pic_load(stbi__context* s, int* px, int* py, int* comp, int req_comp, stbi__result_info* ri) {
-	stbi_uc* result;
-	int i, x, y, internal_comp;
-	STBI_NOTUSED(ri);
-
-	if (!comp)
-		comp = &internal_comp;
-
-	for (i = 0; i < 92; ++i)
-		stbi__get8(s);
-
-	x = stbi__get16be(s);
-	y = stbi__get16be(s);
-	if (stbi__at_eof(s))
-		return stbi__errpuc("bad file", "file too short (pic header)");
-	if (!stbi__mad3sizes_valid(x, y, 4, 0))
-		return stbi__errpuc("too large", "PIC image too large to decode");
-
-	stbi__get32be(s); // skip `ratio'
-	stbi__get16be(s); // skip `fields'
-	stbi__get16be(s); // skip `pad'
-
-	// intermediate buffer is RGBA
-	result = (stbi_uc*)stbi__malloc_mad3(x, y, 4, 0);
-	memset(result, 0xff, x * y * 4);
-
-	if (!stbi__pic_load_core(s, x, y, comp, result)) {
-		STBI_FREE(result);
-		result = 0;
-	}
-	*px = x;
-	*py = y;
-	if (req_comp == 0)
-		req_comp = *comp;
-	result = stbi__convert_format(result, 4, req_comp, x, y);
-
-	return result;
-}
-
-static int stbi__pic_test(stbi__context* s) {
-	int r = stbi__pic_test_core(s);
-	stbi__rewind(s);
-	return r;
-}
-#endif
-
-// *************************************************************************************************
-// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb
-
-#ifndef STBI_NO_GIF
-typedef struct {
-	stbi__int16 prefix;
-	stbi_uc first;
-	stbi_uc suffix;
-} stbi__gif_lzw;
-
-typedef struct {
-	int w, h;
-	stbi_uc* out;		 // output buffer (always 4 components)
-	stbi_uc* background; // The current "background" as far as a gif is concerned
-	stbi_uc* history;
-	int flags, bgindex, ratio, transparent, eflags;
-	stbi_uc pal[256][4];
-	stbi_uc lpal[256][4];
-	stbi__gif_lzw codes[8192];
-	stbi_uc* color_table;
-	int parse, step;
-	int lflags;
-	int start_x, start_y;
-	int max_x, max_y;
-	int cur_x, cur_y;
-	int line_size;
-	int delay;
-} stbi__gif;
-
-static int stbi__gif_test_raw(stbi__context* s) {
-	int sz;
-	if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8')
-		return 0;
-	sz = stbi__get8(s);
-	if (sz != '9' && sz != '7')
-		return 0;
-	if (stbi__get8(s) != 'a')
-		return 0;
-	return 1;
-}
-
-static int stbi__gif_test(stbi__context* s) {
-	int r = stbi__gif_test_raw(s);
-	stbi__rewind(s);
-	return r;
-}
-
-static void stbi__gif_parse_colortable(stbi__context* s, stbi_uc pal[256][4], int num_entries, int transp) {
-	int i;
-	for (i = 0; i < num_entries; ++i) {
-		pal[i][2] = stbi__get8(s);
-		pal[i][1] = stbi__get8(s);
-		pal[i][0] = stbi__get8(s);
-		pal[i][3] = transp == i ? 0 : 255;
-	}
-}
-
-static int stbi__gif_header(stbi__context* s, stbi__gif* g, int* comp, int is_info) {
-	stbi_uc version;
-	if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8')
-		return stbi__err("not GIF", "Corrupt GIF");
-
-	version = stbi__get8(s);
-	if (version != '7' && version != '9')
-		return stbi__err("not GIF", "Corrupt GIF");
-	if (stbi__get8(s) != 'a')
-		return stbi__err("not GIF", "Corrupt GIF");
-
-	stbi__g_failure_reason = "";
-	g->w = stbi__get16le(s);
-	g->h = stbi__get16le(s);
-	g->flags = stbi__get8(s);
-	g->bgindex = stbi__get8(s);
-	g->ratio = stbi__get8(s);
-	g->transparent = -1;
-
-	if (comp != 0)
-		*comp = 4; // can't actually tell whether it's 3 or 4 until we parse the
-				   // comments
-
-	if (is_info)
-		return 1;
-
-	if (g->flags & 0x80)
-		stbi__gif_parse_colortable(s, g->pal, 2 << (g->flags & 7), -1);
-
-	return 1;
-}
-
-static int stbi__gif_info_raw(stbi__context* s, int* x, int* y, int* comp) {
-	stbi__gif* g = (stbi__gif*)stbi__malloc(sizeof(stbi__gif));
-	if (!stbi__gif_header(s, g, comp, 1)) {
-		STBI_FREE(g);
-		stbi__rewind(s);
-		return 0;
-	}
-	if (x)
-		*x = g->w;
-	if (y)
-		*y = g->h;
-	STBI_FREE(g);
-	return 1;
-}
-
-static void stbi__out_gif_code(stbi__gif* g, stbi__uint16 code) {
-	stbi_uc *p, *c;
-	int idx;
-
-	// recurse to decode the prefixes, since the linked-list is backwards,
-	// and working backwards through an interleaved image would be nasty
-	if (g->codes[code].prefix >= 0)
-		stbi__out_gif_code(g, g->codes[code].prefix);
-
-	if (g->cur_y >= g->max_y)
-		return;
-
-	idx = g->cur_x + g->cur_y;
-	p = &g->out[idx];
-	g->history[idx / 4] = 1;
-
-	c = &g->color_table[g->codes[code].suffix * 4];
-	if (c[3] > 128) { // don't render transparent pixels;
-		p[0] = c[2];
-		p[1] = c[1];
-		p[2] = c[0];
-		p[3] = c[3];
-	}
-	g->cur_x += 4;
-
-	if (g->cur_x >= g->max_x) {
-		g->cur_x = g->start_x;
-		g->cur_y += g->step;
-
-		while (g->cur_y >= g->max_y && g->parse > 0) {
-			g->step = (1 << g->parse) * g->line_size;
-			g->cur_y = g->start_y + (g->step >> 1);
-			--g->parse;
-		}
-	}
-}
-
-static stbi_uc* stbi__process_gif_raster(stbi__context* s, stbi__gif* g) {
-	stbi_uc lzw_cs;
-	stbi__int32 len, init_code;
-	stbi__uint32 first;
-	stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear;
-	stbi__gif_lzw* p;
-
-	lzw_cs = stbi__get8(s);
-	if (lzw_cs > 12)
-		return NULL;
-	clear = 1 << lzw_cs;
-	first = 1;
-	codesize = lzw_cs + 1;
-	codemask = (1 << codesize) - 1;
-	bits = 0;
-	valid_bits = 0;
-	for (init_code = 0; init_code < clear; init_code++) {
-		g->codes[init_code].prefix = -1;
-		g->codes[init_code].first = (stbi_uc)init_code;
-		g->codes[init_code].suffix = (stbi_uc)init_code;
-	}
-
-	// support no starting clear code
-	avail = clear + 2;
-	oldcode = -1;
-
-	len = 0;
-	for (;;) {
-		if (valid_bits < codesize) {
-			if (len == 0) {
-				len = stbi__get8(s); // start new block
-				if (len == 0)
-					return g->out;
-			}
-			--len;
-			bits |= (stbi__int32)stbi__get8(s) << valid_bits;
-			valid_bits += 8;
-		} else {
-			stbi__int32 code = bits & codemask;
-			bits >>= codesize;
-			valid_bits -= codesize;
-			// @OPTIMIZE: is there some way we can accelerate the non-clear
-			// path?
-			if (code == clear) { // clear code
-				codesize = lzw_cs + 1;
-				codemask = (1 << codesize) - 1;
-				avail = clear + 2;
-				oldcode = -1;
-				first = 0;
-			} else if (code == clear + 1) { // end of stream code
-				stbi__skip(s, len);
-				while ((len = stbi__get8(s)) > 0)
-					stbi__skip(s, len);
-				return g->out;
-			} else if (code <= avail) {
-				if (first) {
-					return stbi__errpuc("no clear code", "Corrupt GIF");
-				}
-
-				if (oldcode >= 0) {
-					p = &g->codes[avail++];
-					if (avail > 8192) {
-						return stbi__errpuc("too many codes", "Corrupt GIF");
-					}
-
-					p->prefix = (stbi__int16)oldcode;
-					p->first = g->codes[oldcode].first;
-					p->suffix = (code == avail) ? p->first : g->codes[code].first;
-				} else if (code == avail)
-					return stbi__errpuc("illegal code in raster", "Corrupt GIF");
-
-				stbi__out_gif_code(g, (stbi__uint16)code);
-
-				if ((avail & codemask) == 0 && avail <= 0x0FFF) {
-					codesize++;
-					codemask = (1 << codesize) - 1;
-				}
-
-				oldcode = code;
-			} else {
-				return stbi__errpuc("illegal code in raster", "Corrupt GIF");
-			}
-		}
-	}
-}
-
-// this function is designed to support animated gifs, although stb_image
-// doesn't support it two back is the image from two frames ago, used for a very
-// specific disposal format
-static stbi_uc* stbi__gif_load_next(stbi__context* s, stbi__gif* g, int* comp, int req_comp, stbi_uc* two_back) {
-	int dispose;
-	int first_frame;
-	int pi;
-	int pcount;
-	STBI_NOTUSED(req_comp);
-
-	// on first frame, any non-written pixels get the background colour
-	// (non-transparent)
-	first_frame = 0;
-	if (g->out == 0) {
-		if (!stbi__gif_header(s, g, comp, 0))
-			return 0; // stbi__g_failure_reason set by stbi__gif_header
-		if (!stbi__mad3sizes_valid(4, g->w, g->h, 0))
-			return stbi__errpuc("too large", "GIF image is too large");
-		pcount = g->w * g->h;
-		g->out = (stbi_uc*)stbi__malloc(4 * pcount);
-		g->background = (stbi_uc*)stbi__malloc(4 * pcount);
-		g->history = (stbi_uc*)stbi__malloc(pcount);
-		if (!g->out || !g->background || !g->history)
-			return stbi__errpuc("outofmem", "Out of memory");
-
-		// image is treated as "transparent" at the start - ie, nothing
-		// overwrites the current background; background colour is only used for
-		// pixels that are not rendered first frame, after that "background"
-		// color refers to the color that was there the previous frame.
-		memset(g->out, 0x00, 4 * pcount);
-		memset(g->background, 0x00,
-			   4 * pcount); // state of the background (starts transparent)
-		memset(g->history, 0x00,
-			   pcount); // pixels that were affected previous frame
-		first_frame = 1;
-	} else {
-		// second frame - how do we dispoase of the previous one?
-		dispose = (g->eflags & 0x1C) >> 2;
-		pcount = g->w * g->h;
-
-		if ((dispose == 3) && (two_back == 0)) {
-			dispose = 2; // if I don't have an image to revert back to, default
-						 // to the old background
-		}
-
-		if (dispose == 3) { // use previous graphic
-			for (pi = 0; pi < pcount; ++pi) {
-				if (g->history[pi]) {
-					memcpy(&g->out[pi * 4], &two_back[pi * 4], 4);
-				}
-			}
-		} else if (dispose == 2) {
-			// restore what was changed last frame to background before that
-			// frame;
-			for (pi = 0; pi < pcount; ++pi) {
-				if (g->history[pi]) {
-					memcpy(&g->out[pi * 4], &g->background[pi * 4], 4);
-				}
-			}
-		} else {
-			// This is a non-disposal case eithe way, so just
-			// leave the pixels as is, and they will become the new background
-			// 1: do not dispose
-			// 0:  not specified.
-		}
-
-		// background is what out is after the undoing of the previou frame;
-		memcpy(g->background, g->out, 4 * g->w * g->h);
-	}
-
-	// clear my history;
-	memset(g->history, 0x00,
-		   g->w * g->h); // pixels that were affected previous frame
-
-	for (;;) {
-		int tag = stbi__get8(s);
-		switch (tag) {
-		case 0x2C: /* Image Descriptor */
-		{
-			stbi__int32 x, y, w, h;
-			stbi_uc* o;
-
-			x = stbi__get16le(s);
-			y = stbi__get16le(s);
-			w = stbi__get16le(s);
-			h = stbi__get16le(s);
-			if (((x + w) > (g->w)) || ((y + h) > (g->h)))
-				return stbi__errpuc("bad Image Descriptor", "Corrupt GIF");
-
-			g->line_size = g->w * 4;
-			g->start_x = x * 4;
-			g->start_y = y * g->line_size;
-			g->max_x = g->start_x + w * 4;
-			g->max_y = g->start_y + h * g->line_size;
-			g->cur_x = g->start_x;
-			g->cur_y = g->start_y;
-
-			// if the width of the specified rectangle is 0, that means
-			// we may not see *any* pixels or the image is malformed;
-			// to make sure this is caught, move the current y down to
-			// max_y (which is what out_gif_code checks).
-			if (w == 0)
-				g->cur_y = g->max_y;
-
-			g->lflags = stbi__get8(s);
-
-			if (g->lflags & 0x40) {
-				g->step = 8 * g->line_size; // first interlaced spacing
-				g->parse = 3;
-			} else {
-				g->step = g->line_size;
-				g->parse = 0;
-			}
-
-			if (g->lflags & 0x80) {
-				stbi__gif_parse_colortable(s, g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1);
-				g->color_table = (stbi_uc*)g->lpal;
-			} else if (g->flags & 0x80) {
-				g->color_table = (stbi_uc*)g->pal;
-			} else
-				return stbi__errpuc("missing color table", "Corrupt GIF");
-
-			o = stbi__process_gif_raster(s, g);
-			if (!o)
-				return NULL;
-
-			// if this was the first frame,
-			pcount = g->w * g->h;
-			if (first_frame && (g->bgindex > 0)) {
-				// if first frame, any pixel not drawn to gets the background
-				// color
-				for (pi = 0; pi < pcount; ++pi) {
-					if (g->history[pi] == 0) {
-						g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo
-													 // that; It will be reset next frame if need
-													 // be;
-						memcpy(&g->out[pi * 4], &g->pal[g->bgindex], 4);
-					}
-				}
-			}
-
-			return o;
-		}
-
-		case 0x21: // Comment Extension.
-		{
-			int len;
-			int ext = stbi__get8(s);
-			if (ext == 0xF9) { // Graphic Control Extension.
-				len = stbi__get8(s);
-				if (len == 4) {
-					g->eflags = stbi__get8(s);
-					g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second,
-													  // saving as 1/1000ths.
-
-					// unset old transparent
-					if (g->transparent >= 0) {
-						g->pal[g->transparent][3] = 255;
-					}
-					if (g->eflags & 0x01) {
-						g->transparent = stbi__get8(s);
-						if (g->transparent >= 0) {
-							g->pal[g->transparent][3] = 0;
-						}
-					} else {
-						// don't need transparent
-						stbi__skip(s, 1);
-						g->transparent = -1;
-					}
-				} else {
-					stbi__skip(s, len);
-					break;
-				}
-			}
-			while ((len = stbi__get8(s)) != 0) {
-				stbi__skip(s, len);
-			}
-			break;
-		}
-
-		case 0x3B:				// gif stream termination code
-			return (stbi_uc*)s; // using '1' causes warning on some compilers
-
-		default:
-			return stbi__errpuc("unknown code", "Corrupt GIF");
-		}
-	}
-}
-
-static void* stbi__load_gif_main(stbi__context* s, int** delays, int* x, int* y, int* z, int* comp, int req_comp) {
-	if (stbi__gif_test(s)) {
-		int layers = 0;
-		stbi_uc* u = 0;
-		stbi_uc* out = 0;
-		stbi_uc* two_back = 0;
-		stbi__gif g;
-		int stride;
-		memset(&g, 0, sizeof(g));
-		if (delays) {
-			*delays = 0;
-		}
-
-		do {
-			u = stbi__gif_load_next(s, &g, comp, req_comp, two_back);
-			if (u == (stbi_uc*)s)
-				u = 0; // end of animated gif marker
-
-			if (u) {
-				*x = g.w;
-				*y = g.h;
-				++layers;
-				stride = g.w * g.h * 4;
-
-				if (out) {
-					void* tmp = (stbi_uc*)STBI_REALLOC(out, layers * stride);
-					if (NULL == tmp) {
-						STBI_FREE(g.out);
-						STBI_FREE(g.history);
-						STBI_FREE(g.background);
-						return stbi__errpuc("outofmem", "Out of memory");
-					} else
-						out = (stbi_uc*)tmp;
-					if (delays) {
-						*delays = (int*)STBI_REALLOC(*delays, sizeof(int) * layers);
-					}
-				} else {
-					out = (stbi_uc*)stbi__malloc(layers * stride);
-					if (delays) {
-						*delays = (int*)stbi__malloc(layers * sizeof(int));
-					}
-				}
-				memcpy(out + ((layers - 1) * stride), u, stride);
-				if (layers >= 2) {
-					two_back = out - 2 * stride;
-				}
-
-				if (delays) {
-					(*delays)[layers - 1U] = g.delay;
-				}
-			}
-		} while (u != 0);
-
-		// free temp buffer;
-		STBI_FREE(g.out);
-		STBI_FREE(g.history);
-		STBI_FREE(g.background);
-
-		// do the final conversion after loading everything;
-		if (req_comp && req_comp != 4)
-			out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h);
-
-		*z = layers;
-		return out;
-	} else {
-		return stbi__errpuc("not GIF", "Image was not as a gif type.");
-	}
-}
-
-static void* stbi__gif_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
-	stbi_uc* u = 0;
-	stbi__gif g;
-	memset(&g, 0, sizeof(g));
-	STBI_NOTUSED(ri);
-
-	u = stbi__gif_load_next(s, &g, comp, req_comp, 0);
-	if (u == (stbi_uc*)s)
-		u = 0; // end of animated gif marker
-	if (u) {
-		*x = g.w;
-		*y = g.h;
-
-		// moved conversion to after successful load so that the same
-		// can be done for multiple frames.
-		if (req_comp && req_comp != 4)
-			u = stbi__convert_format(u, 4, req_comp, g.w, g.h);
-	} else if (g.out) {
-		// if there was an error and we allocated an image buffer, free it!
-		STBI_FREE(g.out);
-	}
-
-	// free buffers needed for multiple frame loading;
-	STBI_FREE(g.history);
-	STBI_FREE(g.background);
-
-	return u;
-}
-
-static int stbi__gif_info(stbi__context* s, int* x, int* y, int* comp) { return stbi__gif_info_raw(s, x, y, comp); }
-#endif
-
-// *************************************************************************************************
-// Radiance RGBE HDR loader
-// originally by Nicolas Schulz
-#ifndef STBI_NO_HDR
-static int stbi__hdr_test_core(stbi__context* s, const char* signature) {
-	int i;
-	for (i = 0; signature[i]; ++i)
-		if (stbi__get8(s) != signature[i])
-			return 0;
-	stbi__rewind(s);
-	return 1;
-}
-
-static int stbi__hdr_test(stbi__context* s) {
-	int r = stbi__hdr_test_core(s, "#?RADIANCE\n");
-	stbi__rewind(s);
-	if (!r) {
-		r = stbi__hdr_test_core(s, "#?RGBE\n");
-		stbi__rewind(s);
-	}
-	return r;
-}
-
-#define STBI__HDR_BUFLEN 1024
-static char* stbi__hdr_gettoken(stbi__context* z, char* buffer) {
-	int len = 0;
-	char c = '\0';
-
-	c = (char)stbi__get8(z);
-
-	while (!stbi__at_eof(z) && c != '\n') {
-		buffer[len++] = c;
-		if (len == STBI__HDR_BUFLEN - 1) {
-			// flush to end of line
-			while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
-				;
-			break;
-		}
-		c = (char)stbi__get8(z);
-	}
-
-	buffer[len] = 0;
-	return buffer;
-}
-
-static void stbi__hdr_convert(float* output, stbi_uc* input, int req_comp) {
-	if (input[3] != 0) {
-		float f1;
-		// Exponent
-		f1 = (float)ldexp(1.0f, input[3] - (int)(128 + 8));
-		if (req_comp <= 2)
-			output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
-		else {
-			output[0] = input[0] * f1;
-			output[1] = input[1] * f1;
-			output[2] = input[2] * f1;
-		}
-		if (req_comp == 2)
-			output[1] = 1;
-		if (req_comp == 4)
-			output[3] = 1;
-	} else {
-		switch (req_comp) {
-		case 4:
-			output[3] = 1; /* fallthrough */
-		case 3:
-			output[0] = output[1] = output[2] = 0;
-			break;
-		case 2:
-			output[1] = 1; /* fallthrough */
-		case 1:
-			output[0] = 0;
-			break;
-		}
-	}
-}
-
-static float* stbi__hdr_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
-	char buffer[STBI__HDR_BUFLEN];
-	char* token;
-	int valid = 0;
-	int width, height;
-	stbi_uc* scanline;
-	float* hdr_data;
-	int len;
-	unsigned char count, value;
-	int i, j, k, c1, c2, z;
-	const char* headerToken;
-	STBI_NOTUSED(ri);
-
-	// Check identifier
-	headerToken = stbi__hdr_gettoken(s, buffer);
-	if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0)
-		return stbi__errpf("not HDR", "Corrupt HDR image");
-
-	// Parse header
-	for (;;) {
-		token = stbi__hdr_gettoken(s, buffer);
-		if (token[0] == 0)
-			break;
-		if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0)
-			valid = 1;
-	}
-
-	if (!valid)
-		return stbi__errpf("unsupported format", "Unsupported HDR format");
-
-	// Parse width and height
-	// can't use sscanf() if we're not using stdio!
-	token = stbi__hdr_gettoken(s, buffer);
-	if (strncmp(token, "-Y ", 3))
-		return stbi__errpf("unsupported data layout", "Unsupported HDR format");
-	token += 3;
-	height = (int)strtol(token, &token, 10);
-	while (*token == ' ')
-		++token;
-	if (strncmp(token, "+X ", 3))
-		return stbi__errpf("unsupported data layout", "Unsupported HDR format");
-	token += 3;
-	width = (int)strtol(token, NULL, 10);
-
-	*x = width;
-	*y = height;
-
-	if (comp)
-		*comp = 3;
-	if (req_comp == 0)
-		req_comp = 3;
-
-	if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0))
-		return stbi__errpf("too large", "HDR image is too large");
-
-	// Read data
-	hdr_data = (float*)stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0);
-	if (!hdr_data)
-		return stbi__errpf("outofmem", "Out of memory");
-
-	// Load image data
-	// image data is stored as some number of sca
-	if (width < 8 || width >= 32768) {
-		// Read flat data
-		for (j = 0; j < height; ++j) {
-			for (i = 0; i < width; ++i) {
-				stbi_uc rgbe[4];
-			main_decode_loop:
-				stbi__getn(s, rgbe, 4);
-				stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
-			}
-		}
-	} else {
-		// Read RLE-encoded data
-		scanline = NULL;
-
-		for (j = 0; j < height; ++j) {
-			c1 = stbi__get8(s);
-			c2 = stbi__get8(s);
-			len = stbi__get8(s);
-			if (c1 != 2 || c2 != 2 || (len & 0x80)) {
-				// not run-length encoded, so we have to actually use THIS data
-				// as a decoded pixel (note this can't be a valid pixel--one of
-				// RGB must be
-				// >= 128)
-				stbi_uc rgbe[4];
-				rgbe[0] = (stbi_uc)c1;
-				rgbe[1] = (stbi_uc)c2;
-				rgbe[2] = (stbi_uc)len;
-				rgbe[3] = (stbi_uc)stbi__get8(s);
-				stbi__hdr_convert(hdr_data, rgbe, req_comp);
-				i = 1;
-				j = 0;
-				STBI_FREE(scanline);
-				goto main_decode_loop; // yes, this makes no sense
-			}
-			len <<= 8;
-			len |= stbi__get8(s);
-			if (len != width) {
-				STBI_FREE(hdr_data);
-				STBI_FREE(scanline);
-				return stbi__errpf("invalid decoded scanline length", "corrupt HDR");
-			}
-			if (scanline == NULL) {
-				scanline = (stbi_uc*)stbi__malloc_mad2(width, 4, 0);
-				if (!scanline) {
-					STBI_FREE(hdr_data);
-					return stbi__errpf("outofmem", "Out of memory");
-				}
-			}
-
-			for (k = 0; k < 4; ++k) {
-				int nleft;
-				i = 0;
-				while ((nleft = width - i) > 0) {
-					count = stbi__get8(s);
-					if (count > 128) {
-						// Run
-						value = stbi__get8(s);
-						count -= 128;
-						if (count > nleft) {
-							STBI_FREE(hdr_data);
-							STBI_FREE(scanline);
-							return stbi__errpf("corrupt", "bad RLE data in HDR");
-						}
-						for (z = 0; z < count; ++z)
-							scanline[i++ * 4 + k] = value;
-					} else {
-						// Dump
-						if (count > nleft) {
-							STBI_FREE(hdr_data);
-							STBI_FREE(scanline);
-							return stbi__errpf("corrupt", "bad RLE data in HDR");
-						}
-						for (z = 0; z < count; ++z)
-							scanline[i++ * 4 + k] = stbi__get8(s);
-					}
-				}
-			}
-			for (i = 0; i < width; ++i)
-				stbi__hdr_convert(hdr_data + (j * width + i) * req_comp, scanline + i * 4, req_comp);
-		}
-		if (scanline)
-			STBI_FREE(scanline);
-	}
-
-	return hdr_data;
-}
-
-static int stbi__hdr_info(stbi__context* s, int* x, int* y, int* comp) {
-	char buffer[STBI__HDR_BUFLEN];
-	char* token;
-	int valid = 0;
-	int dummy;
-
-	if (!x)
-		x = &dummy;
-	if (!y)
-		y = &dummy;
-	if (!comp)
-		comp = &dummy;
-
-	if (stbi__hdr_test(s) == 0) {
-		stbi__rewind(s);
-		return 0;
-	}
-
-	for (;;) {
-		token = stbi__hdr_gettoken(s, buffer);
-		if (token[0] == 0)
-			break;
-		if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0)
-			valid = 1;
-	}
-
-	if (!valid) {
-		stbi__rewind(s);
-		return 0;
-	}
-	token = stbi__hdr_gettoken(s, buffer);
-	if (strncmp(token, "-Y ", 3)) {
-		stbi__rewind(s);
-		return 0;
-	}
-	token += 3;
-	*y = (int)strtol(token, &token, 10);
-	while (*token == ' ')
-		++token;
-	if (strncmp(token, "+X ", 3)) {
-		stbi__rewind(s);
-		return 0;
-	}
-	token += 3;
-	*x = (int)strtol(token, NULL, 10);
-	*comp = 3;
-	return 1;
-}
-#endif // STBI_NO_HDR
-
-#ifndef STBI_NO_BMP
-static int stbi__bmp_info(stbi__context* s, int* x, int* y, int* comp) {
-	void* p;
-	stbi__bmp_data info;
-
-	info.all_a = 255;
-	p = stbi__bmp_parse_header(s, &info);
-	stbi__rewind(s);
-	if (p == NULL)
-		return 0;
-	if (x)
-		*x = s->img_x;
-	if (y)
-		*y = s->img_y;
-	if (comp) {
-		if (info.bpp == 24 && info.ma == 0xff000000)
-			*comp = 3;
-		else
-			*comp = info.ma ? 4 : 3;
-	}
-	return 1;
-}
-#endif
-
-#ifndef STBI_NO_PSD
-static int stbi__psd_info(stbi__context* s, int* x, int* y, int* comp) {
-	int channelCount, dummy, depth;
-	if (!x)
-		x = &dummy;
-	if (!y)
-		y = &dummy;
-	if (!comp)
-		comp = &dummy;
-	if (stbi__get32be(s) != 0x38425053) {
-		stbi__rewind(s);
-		return 0;
-	}
-	if (stbi__get16be(s) != 1) {
-		stbi__rewind(s);
-		return 0;
-	}
-	stbi__skip(s, 6);
-	channelCount = stbi__get16be(s);
-	if (channelCount < 0 || channelCount > 16) {
-		stbi__rewind(s);
-		return 0;
-	}
-	*y = stbi__get32be(s);
-	*x = stbi__get32be(s);
-	depth = stbi__get16be(s);
-	if (depth != 8 && depth != 16) {
-		stbi__rewind(s);
-		return 0;
-	}
-	if (stbi__get16be(s) != 3) {
-		stbi__rewind(s);
-		return 0;
-	}
-	*comp = 4;
-	return 1;
-}
-
-static int stbi__psd_is16(stbi__context* s) {
-	int channelCount, depth;
-	if (stbi__get32be(s) != 0x38425053) {
-		stbi__rewind(s);
-		return 0;
-	}
-	if (stbi__get16be(s) != 1) {
-		stbi__rewind(s);
-		return 0;
-	}
-	stbi__skip(s, 6);
-	channelCount = stbi__get16be(s);
-	if (channelCount < 0 || channelCount > 16) {
-		stbi__rewind(s);
-		return 0;
-	}
-	(void)stbi__get32be(s);
-	(void)stbi__get32be(s);
-	depth = stbi__get16be(s);
-	if (depth != 16) {
-		stbi__rewind(s);
-		return 0;
-	}
-	return 1;
-}
-#endif
-
-#ifndef STBI_NO_PIC
-static int stbi__pic_info(stbi__context* s, int* x, int* y, int* comp) {
-	int act_comp = 0, num_packets = 0, chained, dummy;
-	stbi__pic_packet packets[10];
-
-	if (!x)
-		x = &dummy;
-	if (!y)
-		y = &dummy;
-	if (!comp)
-		comp = &dummy;
-
-	if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) {
-		stbi__rewind(s);
-		return 0;
-	}
-
-	stbi__skip(s, 88);
-
-	*x = stbi__get16be(s);
-	*y = stbi__get16be(s);
-	if (stbi__at_eof(s)) {
-		stbi__rewind(s);
-		return 0;
-	}
-	if ((*x) != 0 && (1 << 28) / (*x) < (*y)) {
-		stbi__rewind(s);
-		return 0;
-	}
-
-	stbi__skip(s, 8);
-
-	do {
-		stbi__pic_packet* packet;
-
-		if (num_packets == sizeof(packets) / sizeof(packets[0]))
-			return 0;
-
-		packet = &packets[num_packets++];
-		chained = stbi__get8(s);
-		packet->size = stbi__get8(s);
-		packet->type = stbi__get8(s);
-		packet->channel = stbi__get8(s);
-		act_comp |= packet->channel;
-
-		if (stbi__at_eof(s)) {
-			stbi__rewind(s);
-			return 0;
-		}
-		if (packet->size != 8) {
-			stbi__rewind(s);
-			return 0;
-		}
-	} while (chained);
-
-	*comp = (act_comp & 0x10 ? 4 : 3);
-
-	return 1;
-}
-#endif
-
-// *************************************************************************************************
-// Portable Gray Map and Portable Pixel Map loader
-// by Ken Miller
-//
-// PGM: http://netpbm.sourceforge.net/doc/pgm.html
-// PPM: http://netpbm.sourceforge.net/doc/ppm.html
-//
-// Known limitations:
-//    Does not support comments in the header section
-//    Does not support ASCII image data (formats P2 and P3)
-//    Does not support 16-bit-per-channel
-
-#ifndef STBI_NO_PNM
-
-static int stbi__pnm_test(stbi__context* s) {
-	char p, t;
-	p = (char)stbi__get8(s);
-	t = (char)stbi__get8(s);
-	if (p != 'P' || (t != '5' && t != '6')) {
-		stbi__rewind(s);
-		return 0;
-	}
-	return 1;
-}
-
-static void* stbi__pnm_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) {
-	stbi_uc* out;
-	STBI_NOTUSED(ri);
-
-	if (!stbi__pnm_info(s, (int*)&s->img_x, (int*)&s->img_y, (int*)&s->img_n))
-		return 0;
-
-	*x = s->img_x;
-	*y = s->img_y;
-	if (comp)
-		*comp = s->img_n;
-
-	if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0))
-		return stbi__errpuc("too large", "PNM too large");
-
-	out = (stbi_uc*)stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0);
-	if (!out)
-		return stbi__errpuc("outofmem", "Out of memory");
-	stbi__getn(s, out, s->img_n * s->img_x * s->img_y);
-
-	if (req_comp && req_comp != s->img_n) {
-		out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y);
-		if (out == NULL)
-			return out; // stbi__convert_format frees input on failure
-	}
-	return out;
-}
-
-static int stbi__pnm_isspace(char c) { return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; }
-
-static void stbi__pnm_skip_whitespace(stbi__context* s, char* c) {
-	for (;;) {
-		while (!stbi__at_eof(s) && stbi__pnm_isspace(*c))
-			*c = (char)stbi__get8(s);
-
-		if (stbi__at_eof(s) || *c != '#')
-			break;
-
-		while (!stbi__at_eof(s) && *c != '\n' && *c != '\r')
-			*c = (char)stbi__get8(s);
-	}
-}
-
-static int stbi__pnm_isdigit(char c) { return c >= '0' && c <= '9'; }
-
-static int stbi__pnm_getinteger(stbi__context* s, char* c) {
-	int value = 0;
-
-	while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) {
-		value = value * 10 + (*c - '0');
-		*c = (char)stbi__get8(s);
-	}
-
-	return value;
-}
-
-static int stbi__pnm_info(stbi__context* s, int* x, int* y, int* comp) {
-	int maxv, dummy;
-	char c, p, t;
-
-	if (!x)
-		x = &dummy;
-	if (!y)
-		y = &dummy;
-	if (!comp)
-		comp = &dummy;
-
-	stbi__rewind(s);
-
-	// Get identifier
-	p = (char)stbi__get8(s);
-	t = (char)stbi__get8(s);
-	if (p != 'P' || (t != '5' && t != '6')) {
-		stbi__rewind(s);
-		return 0;
-	}
-
-	*comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm
-
-	c = (char)stbi__get8(s);
-	stbi__pnm_skip_whitespace(s, &c);
-
-	*x = stbi__pnm_getinteger(s, &c); // read width
-	stbi__pnm_skip_whitespace(s, &c);
-
-	*y = stbi__pnm_getinteger(s, &c); // read height
-	stbi__pnm_skip_whitespace(s, &c);
-
-	maxv = stbi__pnm_getinteger(s, &c); // read max value
-
-	if (maxv > 255)
-		return stbi__err("max value > 255", "PPM image not 8-bit");
-	else
-		return 1;
-}
-#endif
-
-static int stbi__info_main(stbi__context* s, int* x, int* y, int* comp) {
-#ifndef STBI_NO_JPEG
-	if (stbi__jpeg_info(s, x, y, comp))
-		return 1;
-#endif
-
-#ifndef STBI_NO_PNG
-	if (stbi__png_info(s, x, y, comp))
-		return 1;
-#endif
-
-#ifndef STBI_NO_GIF
-	if (stbi__gif_info(s, x, y, comp))
-		return 1;
-#endif
-
-#ifndef STBI_NO_BMP
-	if (stbi__bmp_info(s, x, y, comp))
-		return 1;
-#endif
-
-#ifndef STBI_NO_PSD
-	if (stbi__psd_info(s, x, y, comp))
-		return 1;
-#endif
-
-#ifndef STBI_NO_PIC
-	if (stbi__pic_info(s, x, y, comp))
-		return 1;
-#endif
-
-#ifndef STBI_NO_PNM
-	if (stbi__pnm_info(s, x, y, comp))
-		return 1;
-#endif
-
-#ifndef STBI_NO_HDR
-	if (stbi__hdr_info(s, x, y, comp))
-		return 1;
-#endif
-
-// test tga last because it's a crappy test!
-#ifndef STBI_NO_TGA
-	if (stbi__tga_info(s, x, y, comp))
-		return 1;
-#endif
-	return stbi__err("unknown image type", "Image not of any known type, or corrupt");
-}
-
-static int stbi__is_16_main(stbi__context* s) {
-#ifndef STBI_NO_PNG
-	if (stbi__png_is16(s))
-		return 1;
-#endif
-
-#ifndef STBI_NO_PSD
-	if (stbi__psd_is16(s))
-		return 1;
-#endif
-
-	return 0;
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF int stbi_info(char const* filename, int* x, int* y, int* comp) {
-	FILE* f = stbi__fopen(filename, "rb");
-	int result;
-	if (!f)
-		return stbi__err("can't fopen", "Unable to open file");
-	result = stbi_info_from_file(f, x, y, comp);
-	fclose(f);
-	return result;
-}
-
-STBIDEF int stbi_info_from_file(FILE* f, int* x, int* y, int* comp) {
-	int r;
-	stbi__context s;
-	long pos = ftell(f);
-	stbi__start_file(&s, f);
-	r = stbi__info_main(&s, x, y, comp);
-	fseek(f, pos, SEEK_SET);
-	return r;
-}
-
-STBIDEF int stbi_is_16_bit(char const* filename) {
-	FILE* f = stbi__fopen(filename, "rb");
-	int result;
-	if (!f)
-		return stbi__err("can't fopen", "Unable to open file");
-	result = stbi_is_16_bit_from_file(f);
-	fclose(f);
-	return result;
-}
-
-STBIDEF int stbi_is_16_bit_from_file(FILE* f) {
-	int r;
-	stbi__context s;
-	long pos = ftell(f);
-	stbi__start_file(&s, f);
-	r = stbi__is_16_main(&s);
-	fseek(f, pos, SEEK_SET);
-	return r;
-}
-#endif // !STBI_NO_STDIO
-
-STBIDEF int stbi_info_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp) {
-	stbi__context s;
-	stbi__start_mem(&s, buffer, len);
-	return stbi__info_main(&s, x, y, comp);
-}
-
-STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const* c, void* user, int* x, int* y, int* comp) {
-	stbi__context s;
-	stbi__start_callbacks(&s, (stbi_io_callbacks*)c, user);
-	return stbi__info_main(&s, x, y, comp);
-}
-
-STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const* buffer, int len) {
-	stbi__context s;
-	stbi__start_mem(&s, buffer, len);
-	return stbi__is_16_main(&s);
-}
-
-STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const* c, void* user) {
-	stbi__context s;
-	stbi__start_callbacks(&s, (stbi_io_callbacks*)c, user);
-	return stbi__is_16_main(&s);
-}
-
-#endif // STB_IMAGE_IMPLEMENTATION
-
-/*
-   revision history:
-	  2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and
-   platform ifdefs 2.19  (2018-02-11) fix warning 2.18  (2018-01-30) fix
-   warnings 2.17  (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug
-						 1-bit BMP
-						 *_is_16_bit api
-						 avoid warnings
-	  2.16  (2017-07-23) all functions have 16-bit variants;
-						 STBI_NO_STDIO works again;
-						 compilation fixes;
-						 fix rounding in unpremultiply;
-						 optimize vertical flip;
-						 disable raw_len validation;
-						 documentation fixes
-	  2.15  (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode;
-						 warning fixes; disable run-time SSE detection on gcc;
-						 uniform handling of optional "return" values;
-						 thread-safe initialization of zlib tables
-	  2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet
-   JPGs 2.13  (2016-11-29) add 16-bit API, only supported for PNG right now 2.12
-   (2016-04-02) fix typo in 2.11 PSD fix that caused crashes 2.11  (2016-04-02)
-   allocate large structures on the stack remove white matting for transparent
-   PSD fix reported channel count for PNG & BMP re-enable SSE2 in non-gcc 64-bit
-						 support RGB-formatted JPEG
-						 read 16-bit PNGs (only as 8-bit)
-	  2.10  (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED
-	  2.09  (2016-01-16) allow comments in PNM files
-						 16-bit-per-pixel TGA (not bit-per-component)
-						 info() for TGA could break due to .hdr handling
-						 info() for BMP to shares code instead of sloppy parse
-						 can use STBI_REALLOC_SIZED if allocator doesn't support
-   realloc code cleanup 2.08  (2015-09-13) fix to 2.07 cleanup, reading RGB PSD
-   as RGBA 2.07  (2015-09-13) fix compiler warnings partial animated GIF support
-						 limited 16-bpc PSD support
-						 #ifdef unused functions
-						 bug with < 92 byte PIC,PNM,HDR,TGA
-	  2.06  (2015-04-19) fix bug where PSD returns wrong '*comp' value
-	  2.05  (2015-04-19) fix bug in progressive JPEG handling, fix warning
-	  2.04  (2015-04-15) try to re-enable SIMD on MinGW 64-bit
-	  2.03  (2015-04-12) extra corruption checking (mmozeiko)
-						 stbi_set_flip_vertically_on_load (nguillemot)
-						 fix NEON support; fix mingw support
-	  2.02  (2015-01-19) fix incorrect assert, fix warning
-	  2.01  (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit
-   without -msse2 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG 2.00
-   (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) progressive
-   JPEG (stb) PGM/PPM support (Ken Miller) STBI_MALLOC,STBI_REALLOC,STBI_FREE
-						 GIF bugfix -- seemingly never worked
-						 STBI_NO_*, STBI_ONLY_*
-	  1.48  (2014-12-14) fix incorrectly-named assert()
-	  1.47  (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar
-   Cornut & stb) optimize PNG (ryg) fix bug in interlaced PNG with
-   user-specified channel count (stb) 1.46  (2014-08-26) fix broken tRNS chunk
-   (colorkey-style transparency) in non-paletted PNG 1.45  (2014-08-16) fix
-   MSVC-ARM internal compiler error by wrapping malloc 1.44  (2014-08-07)
-			  various warning fixes from Ronny Chevalier
-	  1.43  (2014-07-15)
-			  fix MSVC-only compiler problem in code changed in 1.42
-	  1.42  (2014-07-09)
-			  don't define _CRT_SECURE_NO_WARNINGS (affects user code)
-			  fixes to stbi__cleanup_jpeg path
-			  added STBI_ASSERT to avoid requiring assert.h
-	  1.41  (2014-06-25)
-			  fix search&replace from 1.36 that messed up comments/error
-   messages 1.40  (2014-06-22) fix gcc struct-initialization warning 1.39
-   (2014-06-15) fix to TGA optimization when req_comp != number of components in
-   TGA; fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my
-   test suite) add support for BMP version 5 (more ignored fields) 1.38
-   (2014-06-06) suppress MSVC warnings on integer casts truncating values fix
-   accidental rename of 'skip' field of I/O 1.37  (2014-06-04) remove duplicate
-   typedef 1.36  (2014-06-03) convert to header file single-file library if
-   de-iphone isn't set, load iphone images color-swapped instead of returning
-   NULL 1.35  (2014-05-27) various warnings fix broken STBI_SIMD path fix bug
-   where stbi_load_from_file no longer left file pointer in correct place fix
-   broken non-easy path for 32-bit BMP (possibly never used) TGA optimization by
-   Arseny Kapoulkine 1.34  (unknown) use STBI_NOTUSED in
-   stbi__resample_row_generic(), fix one more leak in tga failure case 1.33
-   (2011-07-14) make stbi_is_hdr work in STBI_NO_HDR (as specified), minor
-   compiler-friendly improvements 1.32  (2011-07-13) support for "info" function
-   for all supported filetypes (SpartanJ) 1.31  (2011-06-20) a few more leak
-   fixes, bug in PNG handling (SpartanJ) 1.30  (2011-06-11) added ability to
-   load files via callbacks to accomidate custom input streams (Ben Wenger)
-			  removed deprecated format-specific test/load functions
-			  removed support for installable file formats (stbi_loader) --
-   would have been broken for IO callbacks anyway error cases in bmp and tga
-   give messages and don't leak (Raymond Barbiero, grisha) fix inefficiency in
-   decoding 32-bit BMP (David Woo) 1.29  (2010-08-16) various warning fixes from
-   Aurelien Pocheville 1.28  (2010-08-01) fix bug in GIF palette transparency
-   (SpartanJ) 1.27  (2010-08-01) cast-to-stbi_uc to fix warnings 1.26
-   (2010-07-24) fix bug in file buffering for PNG reported by SpartanJ 1.25
-   (2010-07-17) refix trans_data warning (Won Chun) 1.24  (2010-07-12) perf
-   improvements reading from files on platforms with lock-heavy fgetc() minor
-   perf improvements for jpeg deprecated type-specific functions so we'll get
-   feedback if they're needed attempt to fix trans_data warning (Won Chun) 1.23
-   fixed bug in iPhone support 1.22  (2010-07-10) removed image *writing*
-   support stbi_info support from Jetro Lauha GIF support from Jean-Marc Lienher
-			  iPhone PNG-extensions from James Brown
-			  warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err.
-   Janez (U+017D)emva) 1.21    fix use of 'stbi_uc' in header (reported by jon
-   blow) 1.20    added support for Softimage PIC, by Tom Seddon 1.19    bug in
-   interlaced PNG corruption check (found by ryg) 1.18  (2008-08-02) fix a
-   threading bug (local mutable static) 1.17    support interlaced PNG 1.16
-   major bugfix - stbi__convert_format converted one too many pixels 1.15
-   initialize some fields for thread safety 1.14    fix threadsafe conversion
-   bug header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
-	  1.13    threadsafe
-	  1.12    const qualifiers in the API
-	  1.11    Support installable IDCT, colorspace conversion routines
-	  1.10    Fixes for 64-bit (don't use "unsigned long")
-			  optimized upsampling by Fabian "ryg" Giesen
-	  1.09    Fix format-conversion for PSD code (bad global variables!)
-	  1.08    Thatcher Ulrich's PSD code integrated by Nicolas Schulz
-	  1.07    attempt to fix C++ warning/errors again
-	  1.06    attempt to fix C++ warning/errors again
-	  1.05    fix TGA loading to return correct *comp and use good luminance
-   calc 1.04    default float alpha is 1, not 255; use 'void *' for
-   stbi_image_free 1.03    bugfixes to STBI_NO_STDIO, STBI_NO_HDR 1.02 support
-   for (subset of) HDR files, float interface for preferred access to them 1.01
-   fix bug: possible bug in handling right-side up bmps... not sure fix bug: the
-   stbi__bmp_load() and stbi__tga_load() functions didn't work at all 1.00
-   interface to zlib that skips zlib header 0.99    correct handling of alpha in
-   palette 0.98    TGA loader by lonesock; dynamically add loaders (untested)
-	  0.97    jpeg errors on too large a file; also catch another malloc failure
-	  0.96    fix detection of invalid v value - particleman@mollyrocket forum
-	  0.95    during header scan, seek to markers in case of padding
-	  0.94    STBI_NO_STDIO to disable stdio usage; rename all #defines the same
-	  0.93    handle jpegtran output; verbose errors
-	  0.92    read 4,8,16,24,32-bit BMP files of several formats
-	  0.91    output 24-bit Windows 3.0 BMP files
-	  0.90    fix a few more warnings; bump version number to approach 1.0
-	  0.61    bugfixes due to Marc LeBlanc, Christopher Lloyd
-	  0.60    fix compiling as c++
-	  0.59    fix warnings: merge Dave Moore's -Wall fixes
-	  0.58    fix bug: zlib uncompressed mode len/nlen was wrong endian
-	  0.57    fix bug: jpg last huffman symbol before marker was >9 bits but
-   less than 16 available 0.56    fix bug: zlib uncompressed mode len vs. nlen
-	  0.55    fix bug: restart_interval not initialized to 0
-	  0.54    allow NULL for 'int *comp'
-	  0.53    fix bug in png 3->4; speedup png decoding
-	  0.52    png handles req_comp=3,4 directly; minor cleanup; jpeg comments
-	  0.51    obey req_comp requests, 1-component jpegs return as 1-component,
-			  on 'test' only check type, not whether we support this variant
-	  0.50  (2006-11-19)
-			  first released version
-*/
-
-/*
-------------------------------------------------------------------------------
-This software is available under 2 licenses -- choose whichever you prefer.
-------------------------------------------------------------------------------
-ALTERNATIVE A - MIT License
-Copyright (c) 2017 Sean Barrett
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-of the Software, and to permit persons to whom the Software is furnished to do
-so, subject to the following conditions:
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-------------------------------------------------------------------------------
-ALTERNATIVE B - Public Domain (www.unlicense.org)
-This is free and unencumbered software released into the public domain.
-Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
-software, either in source code form or as a compiled binary, for any purpose,
-commercial or non-commercial, and by any means.
-In jurisdictions that recognize copyright laws, the author or authors of this
-software dedicate any and all copyright interest in the software to the public
-domain. We make this dedication for the benefit of the public at large and to
-the detriment of our heirs and successors. We intend this dedication to be an
-overt act of relinquishment in perpetuity of all present and future rights to
-this software under copyright law.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-------------------------------------------------------------------------------
-*/
--- a/src/include/stretchy_buffer.h
+++ /dev/null
@@ -1,263 +1,0 @@
-// stretchy_buffer.h - v1.04 - public domain - nothings.org/stb
-// a vector<>-like dynamic array for C
-//
-// version history:
-//      1.04 -  fix warning
-//      1.03 -  compile as C++ maybe
-//      1.02 -  tweaks to syntax for no good reason
-//      1.01 -  added a "common uses" documentation section
-//      1.0  -  fixed bug in the version I posted prematurely
-//      0.9  -  rewrite to try to avoid strict-aliasing optimization
-//              issues, but won't compile as C++
-//
-// Will probably not work correctly with strict-aliasing optimizations.
-//
-// The idea:
-//
-//    This implements an approximation to C++ vector<> for C, in that it
-//    provides a generic definition for dynamic arrays which you can
-//    still access in a typesafe way using arr[i] or *(arr+i). However,
-//    it is simply a convenience wrapper around the common idiom of
-//    of keeping a set of variables (in a struct or globals) which store
-//        - pointer to array
-//        - the length of the "in-use" part of the array
-//        - the current size of the allocated array
-//
-//    I find it to be the single most useful non-built-in-structure when
-//    programming in C (hash tables a close second), but to be clear
-//    it lacks many of the capabilities of C++ vector<>: there is no
-//    range checking, the object address isn't stable (see next section
-//    for details), the set of methods available is small (although
-//    the file stb.h has another implementation of stretchy buffers
-//    called 'stb_arr' which provides more methods, e.g. for insertion
-//    and deletion).
-//
-// How to use:
-//
-//    Unlike other stb header file libraries, there is no need to
-//    define an _IMPLEMENTATION symbol. Every #include creates as
-//    much implementation is needed.
-//
-//    stretchy_buffer.h does not define any types, so you do not
-//    need to #include it to before defining data types that are
-//    stretchy buffers, only in files that *manipulate* stretchy
-//    buffers.
-//
-//    If you want a stretchy buffer aka dynamic array containing
-//    objects of TYPE, declare such an array as:
-//
-//       TYPE *myarray = NULL;
-//
-//    (There is no typesafe way to distinguish between stretchy
-//    buffers and regular arrays/pointers; this is necessary to
-//    make ordinary array indexing work on these objects.)
-//
-//    Unlike C++ vector<>, the stretchy_buffer has the same
-//    semantics as an object that you manually malloc and realloc.
-//    The pointer may relocate every time you add a new object
-//    to it, so you:
-//
-//         1. can't take long-term pointers to elements of the array
-//         2. have to return the pointer from functions which might expand it
-//            (either as a return value or by storing it to a ptr-to-ptr)
-//
-//    Now you can do the following things with this array:
-//
-//         sb_free(TYPE *a)           free the array
-//         sb_count(TYPE *a)          the number of elements in the array
-//         sb_push(TYPE *a, TYPE v)   adds v on the end of the array, a la push_back
-//         sb_add(TYPE *a, int n)     adds n uninitialized elements at end of array & returns pointer to first added
-//         sb_last(TYPE *a)           returns an lvalue of the last item in the array
-//         a[n]                       access the nth (counting from 0) element of the array
-//
-//     #define STRETCHY_BUFFER_NO_SHORT_NAMES to only export
-//     names of the form 'stb_sb_' if you have a name that would
-//     otherwise collide.
-//
-//     Note that these are all macros and many of them evaluate
-//     their arguments more than once, so the arguments should
-//     be side-effect-free.
-//
-//     Note that 'TYPE *a' in sb_push and sb_add must be lvalues
-//     so that the library can overwrite the existing pointer if
-//     the object has to be reallocated.
-//
-//     In an out-of-memory condition, the code will try to
-//     set up a null-pointer or otherwise-invalid-pointer
-//     exception to happen later. It's possible optimizing
-//     compilers could detect this write-to-null statically
-//     and optimize away some of the code, but it should only
-//     be along the failure path. Nevertheless, for more security
-//     in the face of such compilers, #define STRETCHY_BUFFER_OUT_OF_MEMORY
-//     to a statement such as assert(0) or exit(1) or something
-//     to force a failure when out-of-memory occurs.
-//
-// Common use:
-//
-//    The main application for this is when building a list of
-//    things with an unknown quantity, either due to loading from
-//    a file or through a process which produces an unpredictable
-//    number.
-//
-//    My most common idiom is something like:
-//
-//       SomeStruct *arr = NULL;
-//       while (something)
-//       {
-//          SomeStruct new_one;
-//          new_one.whatever = whatever;
-//          new_one.whatup   = whatup;
-//          new_one.foobar   = barfoo;
-//          sb_push(arr, new_one);
-//       }
-//
-//    and various closely-related factorings of that. For example,
-//    you might have several functions to create/init new SomeStructs,
-//    and if you use the above idiom, you might prefer to make them
-//    return structs rather than take non-const-pointers-to-structs,
-//    so you can do things like:
-//
-//       SomeStruct *arr = NULL;
-//       while (something)
-//       {
-//          if (case_A) {
-//             sb_push(arr, some_func1());
-//          } else if (case_B) {
-//             sb_push(arr, some_func2());
-//          } else {
-//             sb_push(arr, some_func3());
-//          }
-//       }
-//
-//    Note that the above relies on the fact that sb_push doesn't
-//    evaluate its second argument more than once. The macros do
-//    evaluate the *array* argument multiple times, and numeric
-//    arguments may be evaluated multiple times, but you can rely
-//    on the second argument of sb_push being evaluated only once.
-//
-//    Of course, you don't have to store bare objects in the array;
-//    if you need the objects to have stable pointers, store an array
-//    of pointers instead:
-//
-//       SomeStruct **arr = NULL;
-//       while (something)
-//       {
-//          SomeStruct *new_one = malloc(sizeof(*new_one));
-//          new_one->whatever = whatever;
-//          new_one->whatup   = whatup;
-//          new_one->foobar   = barfoo;
-//          sb_push(arr, new_one);
-//       }
-//
-// How it works:
-//
-//    A long-standing tradition in things like malloc implementations
-//    is to store extra data before the beginning of the block returned
-//    to the user. The stretchy buffer implementation here uses the
-//    same trick; the current-count and current-allocation-size are
-//    stored before the beginning of the array returned to the user.
-//    (This means you can't directly free() the pointer, because the
-//    allocated pointer is different from the type-safe pointer provided
-//    to the user.)
-//
-//    The details are trivial and implementation is straightforward;
-//    the main trick is in realizing in the first place that it's
-//    possible to do this in a generic, type-safe way in C.
-//
-// Contributors:
-//
-// Timothy Wright (github:ZenToad)
-//
-// LICENSE
-//
-//   See end of file for license information.
-
-#ifndef STB_STRETCHY_BUFFER_H_INCLUDED
-#define STB_STRETCHY_BUFFER_H_INCLUDED
-
-#ifndef NO_STRETCHY_BUFFER_SHORT_NAMES
-#define sb_free   stb_sb_free
-#define sb_push   stb_sb_push
-#define sb_count  stb_sb_count
-#define sb_add    stb_sb_add
-#define sb_last   stb_sb_last
-#endif
-
-#define stb_sb_free(a)         ((a) ? free(stb__sbraw(a)),0 : 0)
-#define stb_sb_push(a,v)       (stb__sbmaybegrow(a,1), (a)[stb__sbn(a)++] = (v))
-#define stb_sb_count(a)        ((a) ? stb__sbn(a) : 0)
-#define stb_sb_add(a,n)        (stb__sbmaybegrow(a,n), stb__sbn(a)+=(n), &(a)[stb__sbn(a)-(n)])
-#define stb_sb_last(a)         ((a)[stb__sbn(a)-1])
-
-#define stb__sbraw(a) ((int *) (void *) (a) - 2)
-#define stb__sbm(a)   stb__sbraw(a)[0]
-#define stb__sbn(a)   stb__sbraw(a)[1]
-
-#define stb__sbneedgrow(a,n)  ((a)==0 || stb__sbn(a)+(n) >= stb__sbm(a))
-#define stb__sbmaybegrow(a,n) (stb__sbneedgrow(a,(n)) ? stb__sbgrow(a,n) : 0)
-#define stb__sbgrow(a,n)      (*((void **)&(a)) = stb__sbgrowf((a), (n), sizeof(*(a))))
-
-#include <stdlib.h>
-
-static void * stb__sbgrowf(void *arr, int increment, int itemsize)
-{
-   int dbl_cur = arr ? 2*stb__sbm(arr) : 0;
-   int min_needed = stb_sb_count(arr) + increment;
-   int m = dbl_cur > min_needed ? dbl_cur : min_needed;
-   int *p = (int *) realloc(arr ? stb__sbraw(arr) : 0, itemsize * m + sizeof(int)*2);
-   if (p) {
-      if (!arr)
-         p[1] = 0;
-      p[0] = m;
-      return p+2;
-   } else {
-      #ifdef STRETCHY_BUFFER_OUT_OF_MEMORY
-      STRETCHY_BUFFER_OUT_OF_MEMORY ;
-      #endif
-      return (void *) (2*sizeof(int)); // try to force a NULL pointer exception later
-   }
-}
-#endif // STB_STRETCHY_BUFFER_H_INCLUDED
-
-
-/*
-------------------------------------------------------------------------------
-This software is available under 2 licenses -- choose whichever you prefer.
-------------------------------------------------------------------------------
-ALTERNATIVE A - MIT License
-Copyright (c) 2017 Sean Barrett
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-of the Software, and to permit persons to whom the Software is furnished to do
-so, subject to the following conditions:
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-------------------------------------------------------------------------------
-ALTERNATIVE B - Public Domain (www.unlicense.org)
-This is free and unencumbered software released into the public domain.
-Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
-software, either in source code form or as a compiled binary, for any purpose,
-commercial or non-commercial, and by any means.
-In jurisdictions that recognize copyright laws, the author or authors of this
-software dedicate any and all copyright interest in the software to the public
-domain. We make this dedication for the benefit of the public at large and to
-the detriment of our heirs and successors. We intend this dedication to be an
-overt act of relinquishment in perpetuity of all present and future rights to
-this software under copyright law.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-------------------------------------------------------------------------------
-*/
--- a/src/include/tobjparse.h
+++ /dev/null
@@ -1,338 +1,0 @@
-#ifndef TOBJ_PARSE_H
-#define TOBJ_PARSE_H
-#include "3dMath.h"
-#include "stretchy_buffer.h"
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <ctype.h>
-typedef struct{
-	long long unsigned int p;	
-	long long unsigned int n;	
-	long long unsigned int tc;
-	long long unsigned int vc;
-}facedef;
-typedef struct{
-	vec3* positions;
-	vec3* normals;
-	vec3* texcoords;
-	vec3* colors;
-	facedef* faces;
-}objraw;
-typedef struct{
-	int npoints; //Number of points.
-	vec3* d; //Triangles (Same winding as in the file)
-	vec3* n; //Normals
-	vec3* t; //Texture Cordinates
-	vec3* c; //colors
-}model;
-objraw initobjraw(){
-	return (objraw){
-		.positions=NULL,
-		.normals=NULL,
-		.texcoords=NULL,
-		.faces=NULL
-	};
-}
-model initmodel(){
-	return (model){
-		.npoints=0,
-		.d=NULL,
-		.n=NULL,
-		.t=NULL,
-		.c=NULL
-	};
-}
-void freeobjraw(objraw* o){
-	sb_free(o->positions);
-	sb_free(o->texcoords);
-	sb_free(o->normals);
-	sb_free(o->colors);
-	sb_free(o->faces);
-}
-void freemodel(model* o){
-	free(o->d);
-	free(o->t);
-	free(o->n);
-	free(o->c);
-}
-model tobj_tomodel(objraw* raw){
-	if(!raw || raw->faces == NULL)
-	{
-		puts("\nAttempted to convert empty model... Aborting...\n");
-		return initmodel();
-	}
-	model ret = initmodel();
-	ret.npoints = 0;
-	ret.d=malloc(sizeof(vec3) * sb_count(raw->faces));
-	if(raw->normals)ret.n=malloc(sizeof(vec3) * sb_count(raw->faces));
-	if(raw->texcoords)ret.t=malloc(sizeof(vec3) * sb_count(raw->faces));
-	if(raw->colors)ret.c=malloc(sizeof(vec3) * sb_count(raw->faces));
-	long long unsigned int piter = 0;
-	long long unsigned int niter = 0;
-	long long unsigned int titer = 0;
-	long long unsigned int citer = 0;
-	//printf("\nsb_count of faces is %d",sb_count(raw->faces));
-	for(long long int i = 0; i < sb_count(raw->faces);i++){
-		//printf("\n::%lld:: 0\n",i);
-		long long unsigned int p = raw->faces[i].p-1;
-		long long unsigned int n = raw->faces[i].n-1;
-		long long unsigned int t = raw->faces[i].tc-1;
-		long long unsigned int c = raw->faces[i].vc-1;
-		
-		if(p < (long long unsigned int)sb_count(raw->positions)){
-			//sb_push(ret.d, raw->positions[p]);
-			ret.d[piter++] = raw->positions[p];
-			ret.npoints++;
-		} else {
-			printf("\nBad Data!!!\n");
-			printf("p=%llu n=%llu t=%llu c=%llu i=%lld\n\n",p,n,t,c,i);
-		}
-		if(raw->normals){
-			if(n < (long long unsigned int)sb_count(raw->normals)){
-				//sb_push(ret.n, raw->normals[n]);
-				ret.n[niter++] = raw->normals[n];
-			} else {
-				puts("\n<BAD DATA>, NORMALS\n");
-			}
-		}
-		if(raw->texcoords){
-			if(t < (long long unsigned int)sb_count(raw->texcoords)){
-				//sb_push(ret.t, raw->texcoords[t]);
-				ret.t[titer++] = raw->texcoords[t];
-			} else
-				puts("\n<BAD DATA>, TEXCOORDS\n");
-		}
-		if(raw->colors){
-			if(c < (long long unsigned int)sb_count(raw->colors)){
-				//sb_push(ret.c, raw->colors[c]);
-				ret.c[citer++] = raw->colors[c];
-			} else {
-				puts("\n<BAD DATA>, COLORS\n");
-			}
-		}
-	}
-	//printf("\ntobj_tomodel completed.\n");
-	if(ret.npoints != piter){
-		printf("\nBAD DATA!!! ABORTING...\n");
-		exit(1);
-	}
-	return ret;
-}
-//Only loads 
-objraw tobj_load(const char* fn){
-	FILE* f;
-	f = fopen(fn, "r");
-	objraw retval = initobjraw();
-	if(f){
-		char line[2048];line[2047]=0;
-		//int read = 0;
-
-
-		while(fgets(line, 2047, f)){
-			vec3 val;
-			facedef frick0;
-			facedef frick1;
-			facedef frick2;
-			if(line[0] == 'v' && line[1] == ' ' && (strlen(line) > 4)){
-				//read = sscanf(line,"v %f %f %f",&val.d[0],&val.d[1],&val.d[2]);
-				//printf("\nv Read: %d",read);
-				sb_push(retval.positions, val);
-				char* t = line+2;
-				sb_last(retval.positions).d[0] = atof(t);
-				while(!isspace(*t) && *t != '\0')t++;
-				if(*t == '\0')continue;
-				t++;
-				sb_last(retval.positions).d[1] = atof(t);
-				while(!isspace(*t) && *t != '\0')t++;
-				if(*t == '\0')continue;
-				t++;
-				sb_last(retval.positions).d[2] = atof(t);
-			}
-			if(line[0] == 'v' && line[1] == 't' && (strlen(line) > 4)){
-				//read = sscanf(line,"vt %f %f",&val.d[0],&val.d[1]);
-				sb_push(retval.texcoords, val);
-				char* t = line+3;
-				sb_last(retval.texcoords).d[0] = atof(t);
-				while(!isspace(*t) && *t != '\0')t++;
-				if(*t == '\0')continue;
-				t++;
-				sb_last(retval.texcoords).d[1] = -atof(t);
-				
-			}
-			if(line[0] == 'v' && line[1] == 'c' && (strlen(line) > 4)){
-				//read=sscanf(line,"vc %f %f %f",&val.d[0],&val.d[1],&val.d[2]);
-				sb_push(retval.colors, val);
-				char* t = line+3;
-				sb_last(retval.colors).d[0] = atof(t);
-				while(!isspace(*t) && *t != '\0')t++;
-				if(*t == '\0')continue;
-				t++;
-				sb_last(retval.colors).d[1] = atof(t);
-				while(!isspace(*t) && *t != '\0')t++;
-				if(*t == '\0')continue;
-				t++;
-				sb_last(retval.colors).d[2] = atof(t);
-				//printf("\nvc Read: %d",read);
-				
-			}
-			if(line[0] == 'v' && line[1] =='n' && (strlen(line) > 4)){
-				//read=sscanf(line,"vn %f %f %f",&val.d[0],&val.d[1],&val.d[2]);
-				//printf("\nn Read: %d",read);
-				sb_push(retval.normals, val);
-				char* t = line+3;
-				sb_last(retval.normals).d[0] = atof(t);
-				while(!isspace(*t) && *t != '\0')t++;
-				if(*t == '\0')continue;
-				t++;
-				sb_last(retval.normals).d[1] = atof(t);
-				while(!isspace(*t) && *t != '\0')t++;
-				if(*t == '\0')continue;
-				t++;
-				sb_last(retval.normals).d[2] = atof(t);
-				
-				/*
-				printf("\nreading from stretchy buffer, %f %f %f",
-					retval.normals[sb_count(retval.normals)-1].d[0],
-					retval.normals[sb_count(retval.normals)-1].d[1],
-					retval.normals[sb_count(retval.normals)-1].d[2]
-				);
-				*/
-			}
-			if(line[0] == 'f' && (strlen(line) > 4)){
-				//The face lines are hard to parse.
-				//They could be p p p
-				// or p/vt p/vt p/vt
-				//or p//n p//n p//n
-				//or p/vt/n p/vt/n p/vt/n
-				//or p/vt/n/c p/vt/n/c p/vt/n/c
-				//or some other combination, as long as it has p it's valid
-				//Grab the position indices
-				{
-					char* t = line+2;
-					frick0.p = strtoull(t,NULL,10);
-					//printf("\nf[0].p is %llu",frick0.p);
-					while(!isspace(*t) && *t != '\0')t++;
-					if(*t == '\0')continue;
-					t++;
-					frick1.p = strtoull(t,NULL,10);
-					//printf("\nf[1].p is %llu",frick1.p);
-					while(!isspace(*t) && *t != '\0')t++;
-					if(*t == '\0')continue;
-					t++;
-					frick2.p = strtoull(t,NULL,10);
-					//printf("\nf[2].p is %llu",frick2.p);
-				}
-				//Grab the texture coordinates (First character after first slash!)
-				if(retval.texcoords){
-					char* t = line+2;
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
-					t++;//next character
-					frick0.tc = strtoull(t,NULL,10);
-					//printf("\nf[0].tc is %llu",frick0.tc);
-					//Jump to the next group of numbers
-					while(!isspace(*t) && *t != '\0')t++;
-					if(*t == '\0')continue;
-					t++;
-					//first slash
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to next slash
-					t++;//next character
-					frick1.tc = strtoull(t,NULL,10);
-					//printf("\nf[1].tc is %llu",frick1.tc);
-					//Jump to the next group of numbers
-					while(!isspace(*t) && *t != '\0')t++;
-					if(*t == '\0')continue;
-					t++;
-					//first slash
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to next slash
-					t++;//next character
-					frick2.tc = strtoull(t,NULL,10);
-					//printf("\nf[2].tc is %llu",frick2.tc);
-				}
-				if(retval.normals){
-					char* t = line+2;
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
-					t++;//next character
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
-					t++;//next character
-					frick0.n = strtoull(t,NULL,10);
-					//Jump to the next group of numbers
-					while(!isspace(*t) && *t != '\0')t++;
-					if(*t == '\0')continue;
-					t++;
-					//first slash
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
-					t++;//next character
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
-					t++;//next character
-					frick1.n = strtoull(t,NULL,10);
-
-					//Jump to the next group of numbers
-					while(!isspace(*t) && *t != '\0')t++;
-					if(*t == '\0')continue;
-					t++;
-					//first slash
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
-					t++;//next character
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
-					t++;//next character
-					frick2.n = strtoull(t,NULL,10);
-				}
-				if(retval.colors){
-					char* t = line+2;
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
-					t++;//next character
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
-					t++;//next character
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to third slash
-					t++;//next character
-					frick0.vc = strtoull(t,NULL,10);
-					//printf("\nf[0].vc is %llu",frick0.vc);
-					//Jump to the next group of numbers
-					while(!isspace(*t) && *t != '\0')t++;
-					if(*t == '\0')continue;
-					t++;
-					//first slash
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
-					t++;//next character
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
-					t++;//next character
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to third slash
-					t++;//next character
-					frick1.vc = strtoull(t,NULL,10);
-					//printf("\nf[1].vc is %llu",frick1.vc);
-					//Jump to the next group of numbers
-					while(!isspace(*t) && *t != '\0')t++;
-					if(*t == '\0')continue;
-					t++;
-					//first slash
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to first slash
-					t++;//next character
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to second slash
-					t++;//next character
-					while(!isspace(*t) && *t != '\0' && *t != '/')t++; //jump to third slash
-					t++;//next character
-					frick2.vc = strtoull(t,NULL,10);
-					//printf("\nf[2].vc is %llu",frick2.vc);
-				}
-				sb_push(retval.faces,frick0);
-				sb_push(retval.faces,frick1);
-				sb_push(retval.faces,frick2);
-				/*
-				printf("\nReading from sb, frick0.p=%llu frick0.n=%llu frick0.tc=%llu frick0.vc=%llu",
-					retval.faces[sb_count(retval.faces)-3].p,
-					retval.faces[sb_count(retval.faces)-3].n,
-					retval.faces[sb_count(retval.faces)-3].tc,
-					retval.faces[sb_count(retval.faces)-3].vc
-				);*/
-			}
-		}
-	fclose(f);
-	} else {
-		printf("\nUnable to load file %s\n",fn);
-	}
-	
-	return retval;
-}
-
-#endif
\ No newline at end of file
--- a/src/misc.c
+++ b/src/misc.c
@@ -4,13 +4,16 @@
 
 
 void glPolygonStipple(void* a){
+#if TGL_FEATURE_POLYGON_STIPPLE
 	unsigned char* b = a;
 	GLContext *c=gl_get_context();
 	ZBuffer *zb = c->zb;
-	for(int i = 0; i < 128; i++)
+
+	for(int i = 0; i < TGL_POLYGON_STIPPLE_BYTES; i++)
 	{
 		zb->stipplepattern[i] = b[i];
 	}
+#endif
 }
 
 
--- a/src/zbuffer.h
+++ b/src/zbuffer.h
@@ -57,7 +57,7 @@
     int frame_buffer_allocated;
     /* opengl polygon stipple*/
     int dostipple;
-    unsigned char stipplepattern[128]; //32 bits wide, 32 bits tall. 32 * 4 bytes.
+    unsigned char stipplepattern[TGL_POLYGON_STIPPLE_BYTES]; //32 bits wide, 32 bits tall. 32 * 4 bytes.
      
     int nb_colors;
     unsigned char *dctable;
--- a/src/zfeatures.h
+++ b/src/zfeatures.h
@@ -7,7 +7,18 @@
 #define TGL_FEATURE_ARRAYS         1
 #define TGL_FEATURE_DISPLAYLISTS   1
 #define TGL_FEATURE_POLYGON_OFFSET 1
+
 #define TGL_FEATURE_POLYGON_STIPPLE 1
+//A stipple pattern is 128 bytes in size.
+#define TGL_POLYGON_STIPPLE_BYTES 128
+//A stipple pattern is 2^5 (32) bits wide.
+#define TGL_POLYGON_STIPPLE_POW2_WIDTH 5
+//The stipple pattern mask (the last bits of the screen coordinates used for indexing)
+//The default pattern is 32 bits wide and 32 bits tall, or 4 bytes per row and 32 tall, 4 * 32 128 bytes.
+#define TGL_POLYGON_STIPPLE_MASK_X 31
+#define TGL_POLYGON_STIPPLE_MASK_Y 31
+
+//These are features useful for integrating TinyGL with other renderers.
 #define TGL_FEATURE_NO_COPY_COLOR 0
 #define TGL_FEATURE_FORCE_CLEAR_NO_COPY_COLOR 0
 #define TGL_NO_COPY_COLOR 0xff00ff
--- a/src/ztriangle.c
+++ b/src/ztriangle.c
@@ -20,9 +20,10 @@
 #if TGL_FEATURE_POLYGON_STIPPLE
 
 #define THE_X (((unsigned short)(pp-pp1)))
-#define XSTIP(_a) ((THE_X+_a)& 31)
-#define YSTIP (the_y & 31)
-#define STIPBIT(_a) (zb->stipplepattern[(XSTIP(_a) + (YSTIP<<5))>>3] & (1<<(XSTIP(_a) & 7)))
+#define XSTIP(_a) ((THE_X+_a)& TGL_POLYGON_STIPPLE_MASK_X)
+#define YSTIP (the_y & TGL_POLYGON_STIPPLE_MASK_Y)
+//NOTES                                                           Divide by 8 to get the byte        Get the actual bit
+#define STIPBIT(_a) (zb->stipplepattern[(XSTIP(_a) + (YSTIP<<TGL_POLYGON_STIPPLE_POW2_WIDTH))>>3] & (1<<(XSTIP(_a) & 7)))
 #define STIPTEST(_a) !(zb->dostipple && !STIPBIT(_a))
 #define ZCMP(z,zpix,_a) ((z) >= (zpix) && STIPTEST(_a))