ref: 8ec7f169c5bb4ff30cacaaccbc99585e95d0d008
dir: /ref/r_image.c/
/*
Copyright (C) 1997-2001 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <u.h>
#include <libc.h>
#include <stdio.h>
#include "../dat.h"
#include "../fns.h"
#define MAX_RIMAGES 1024
image_t r_images[MAX_RIMAGES];
int numr_images;
/*
===============
R_ImageList_f
===============
*/
void R_ImageList_f (void)
{
int i;
image_t *image;
int texels;
ri.Con_Printf (PRINT_ALL, "------------------\n");
texels = 0;
for (i=0, image=r_images ; i<numr_images ; i++, image++)
{
if (image->registration_sequence <= 0)
continue;
texels += image->width*image->height;
switch (image->type)
{
case it_skin:
ri.Con_Printf (PRINT_ALL, "M");
break;
case it_sprite:
ri.Con_Printf (PRINT_ALL, "S");
break;
case it_wall:
ri.Con_Printf (PRINT_ALL, "W");
break;
case it_pic:
ri.Con_Printf (PRINT_ALL, "P");
break;
default:
ri.Con_Printf (PRINT_ALL, " ");
break;
}
ri.Con_Printf (PRINT_ALL, " %3i %3i : %s\n",
image->width, image->height, image->name);
}
ri.Con_Printf (PRINT_ALL, "Total texel count: %i\n", texels);
}
/*
=================================================================
PCX LOADING
=================================================================
*/
/*
==============
LoadPCX
==============
*/
void LoadPCX (char *filename, byte **pic, byte **palette, int *width, int *height)
{
byte *raw;
pcx_t *pcx;
int x, y;
int len;
int dataByte, runLength;
byte *out, *pix;
*pic = NULL;
//
// load the file
//
len = ri.FS_LoadFile (filename, (void **)&raw);
if (!raw)
{
ri.Con_Printf (PRINT_DEVELOPER, "Bad pcx file %s\n", filename);
return;
}
//
// parse the PCX file
//
pcx = (pcx_t *)raw;
pcx->xmin = LittleShort(pcx->xmin);
pcx->ymin = LittleShort(pcx->ymin);
pcx->xmax = LittleShort(pcx->xmax);
pcx->ymax = LittleShort(pcx->ymax);
pcx->hres = LittleShort(pcx->hres);
pcx->vres = LittleShort(pcx->vres);
pcx->bytes_per_line = LittleShort(pcx->bytes_per_line);
pcx->palette_type = LittleShort(pcx->palette_type);
raw = &pcx->data;
if (pcx->manufacturer != 0x0a
|| pcx->version != 5
|| pcx->encoding != 1
|| pcx->bits_per_pixel != 8
|| pcx->xmax >= 640
|| pcx->ymax >= 480)
{
ri.Con_Printf (PRINT_ALL, "Bad pcx file %s\n", filename);
return;
}
out = malloc ( (pcx->ymax+1) * (pcx->xmax+1) );
*pic = out;
pix = out;
if (palette)
{
*palette = malloc(768);
memcpy (*palette, (byte *)pcx + len - 768, 768);
}
if (width)
*width = pcx->xmax+1;
if (height)
*height = pcx->ymax+1;
for (y=0 ; y<=pcx->ymax ; y++, pix += pcx->xmax+1)
{
for (x=0 ; x<=pcx->xmax ; )
{
dataByte = *raw++;
if((dataByte & 0xC0) == 0xC0)
{
runLength = dataByte & 0x3F;
dataByte = *raw++;
}
else
runLength = 1;
while(runLength-- > 0)
pix[x++] = dataByte;
}
}
if ( raw - (byte *)pcx > len)
{
ri.Con_Printf (PRINT_DEVELOPER, "PCX file %s was malformed", filename);
free (*pic);
*pic = NULL;
}
ri.FS_FreeFile (pcx);
}
/*
=========================================================
TARGA LOADING
=========================================================
*/
typedef struct _TargaHeader {
unsigned char id_length, colormap_type, image_type;
unsigned short colormap_index, colormap_length;
unsigned char colormap_size;
unsigned short x_origin, y_origin, width, height;
unsigned char pixel_size, attributes;
} TargaHeader;
/*
=============
LoadTGA
=============
*/
void LoadTGA (char *name, byte **pic, int *width, int *height)
{
int columns, rows, numPixels;
byte *pixbuf;
int row, column;
byte *buf_p;
byte *buffer;
TargaHeader targa_header;
byte *targa_rgba;
uchar red = 0, green = 0, blue = 0, alphabyte = 0, packetHeader, packetSize, j;
*pic = NULL;
//
// load the file
//
ri.FS_LoadFile (name, (void **)&buffer); /* int length = */
if (!buffer)
{
ri.Con_Printf (PRINT_DEVELOPER, "Bad tga file %s\n", name);
return;
}
buf_p = buffer;
targa_header.id_length = *buf_p++;
targa_header.colormap_type = *buf_p++;
targa_header.image_type = *buf_p++;
targa_header.colormap_index = LittleShort ( *((short *)buf_p) );
buf_p+=2;
targa_header.colormap_length = LittleShort ( *((short *)buf_p) );
buf_p+=2;
targa_header.colormap_size = *buf_p++;
targa_header.x_origin = LittleShort ( *((short *)buf_p) );
buf_p+=2;
targa_header.y_origin = LittleShort ( *((short *)buf_p) );
buf_p+=2;
targa_header.width = LittleShort ( *((short *)buf_p) );
buf_p+=2;
targa_header.height = LittleShort ( *((short *)buf_p) );
buf_p+=2;
targa_header.pixel_size = *buf_p++;
targa_header.attributes = *buf_p++;
if (targa_header.image_type!=2
&& targa_header.image_type!=10)
ri.Sys_Error (ERR_DROP, "LoadTGA: Only type 2 and 10 targa RGB images supported\n");
if (targa_header.colormap_type !=0
|| (targa_header.pixel_size!=32 && targa_header.pixel_size!=24))
ri.Sys_Error (ERR_DROP, "LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n");
columns = targa_header.width;
rows = targa_header.height;
numPixels = columns * rows;
if (width)
*width = columns;
if (height)
*height = rows;
targa_rgba = malloc (numPixels*4);
*pic = targa_rgba;
if (targa_header.id_length != 0)
buf_p += targa_header.id_length; // skip TARGA image comment
if (targa_header.image_type==2) { // Uncompressed, RGB images
for(row=rows-1; row>=0; row--) {
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; column++) {
switch (targa_header.pixel_size) {
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
}
}
}
else if (targa_header.image_type==10) { // Runlength encoded RGB images
for(row=rows-1; row>=0; row--) {
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; ) {
packetHeader= *buf_p++;
packetSize = 1 + (packetHeader & 0x7f);
if (packetHeader & 0x80) { // run-length packet
switch (targa_header.pixel_size) {
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
break;
}
for(j=0;j<packetSize;j++) {
*pixbuf++=red;
*pixbuf++=green;
*pixbuf++=blue;
*pixbuf++=alphabyte;
column++;
if (column==columns) { // run spans across rows
column=0;
if (row>0)
row--;
else
goto breakOut;
pixbuf = targa_rgba + row*columns*4;
}
}
}
else { // non run-length packet
for(j=0;j<packetSize;j++) {
switch (targa_header.pixel_size) {
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
column++;
if (column==columns) { // pixel packet run spans across rows
column=0;
if (row>0)
row--;
else
goto breakOut;
pixbuf = targa_rgba + row*columns*4;
}
}
}
}
breakOut:;
}
}
ri.FS_FreeFile (buffer);
}
//=======================================================
image_t *R_FindFreeImage (void)
{
image_t *image;
int i;
// find a free image_t
for (i=0, image=r_images ; i<numr_images ; i++,image++)
{
if (!image->registration_sequence)
break;
}
if (i == numr_images)
{
if (numr_images == MAX_RIMAGES)
ri.Sys_Error (ERR_DROP, "MAX_RIMAGES");
numr_images++;
}
image = &r_images[i];
return image;
}
/*
================
GL_LoadPic
================
*/
image_t *GL_LoadPic (char *name, byte *pic, int width, int height, imagetype_t type)
{
image_t *image;
int i, c, b;
image = R_FindFreeImage ();
if (strlen(name) >= sizeof(image->name))
ri.Sys_Error (ERR_DROP, "Draw_LoadPic: \"%s\" is too long", name);
strcpy (image->name, name);
image->registration_sequence = registration_sequence;
image->width = width;
image->height = height;
image->type = type;
c = width*height;
image->pixels[0] = malloc (c);
image->transparent = false;
for (i=0 ; i<c ; i++)
{
b = pic[i];
if (b == 255)
image->transparent = true;
image->pixels[0][i] = b;
}
return image;
}
/*
================
R_LoadWal
================
*/
image_t *R_LoadWal (char *name)
{
miptex_t *mt;
int ofs;
image_t *image;
int size;
ri.FS_LoadFile (name, (void **)&mt);
if (!mt)
{
ri.Con_Printf (PRINT_ALL, "R_LoadWal: can't load %s\n", name);
return r_notexture_mip;
}
image = R_FindFreeImage ();
strcpy (image->name, name);
image->width = LittleLong (mt->width);
image->height = LittleLong (mt->height);
image->type = it_wall;
image->registration_sequence = registration_sequence;
size = image->width*image->height * (256+64+16+4)/256;
image->pixels[0] = malloc (size);
image->pixels[1] = image->pixels[0] + image->width*image->height;
image->pixels[2] = image->pixels[1] + image->width*image->height/4;
image->pixels[3] = image->pixels[2] + image->width*image->height/16;
ofs = LittleLong (mt->offsets[0]);
memcpy ( image->pixels[0], (byte *)mt + ofs, size);
ri.FS_FreeFile ((void *)mt);
return image;
}
/*
===============
R_FindImage
Finds or loads the given image
===============
*/
image_t *R_FindImage (char *name, imagetype_t type)
{
image_t *image;
int i, len;
byte *pic, *palette;
int width, height;
if (!name)
return NULL; // ri.Sys_Error (ERR_DROP, "R_FindImage: NULL name");
len = strlen(name);
if (len<5)
return NULL; // ri.Sys_Error (ERR_DROP, "R_FindImage: bad name: %s", name);
// look for it
for (i=0, image=r_images ; i<numr_images ; i++,image++)
{
if (!strcmp(name, image->name))
{
image->registration_sequence = registration_sequence;
return image;
}
}
//
// load the pic from disk
//
pic = NULL;
palette = NULL;
if (!strcmp(name+len-4, ".pcx"))
{
LoadPCX (name, &pic, &palette, &width, &height);
if (!pic)
return NULL; // ri.Sys_Error (ERR_DROP, "R_FindImage: can't load %s", name);
image = GL_LoadPic (name, pic, width, height, type);
}
else if (!strcmp(name+len-4, ".wal"))
{
image = R_LoadWal (name);
}
else if (!strcmp(name+len-4, ".tga"))
return NULL; // ri.Sys_Error (ERR_DROP, "R_FindImage: can't load %s in software renderer", name);
else
return NULL; // ri.Sys_Error (ERR_DROP, "R_FindImage: bad extension on: %s", name);
if (pic)
free(pic);
if (palette)
free(palette);
return image;
}
/*
===============
R_RegisterSkin
===============
*/
struct image_s *R_RegisterSkin (char *name)
{
return R_FindImage (name, it_skin);
}
/*
================
R_FreeUnusedImages
Any image that was not touched on this registration sequence
will be freed.
================
*/
void R_FreeUnusedImages (void)
{
int i;
image_t *image;
for (i=0, image=r_images ; i<numr_images ; i++, image++)
{
if (image->registration_sequence == registration_sequence)
{
Com_PageInMemory ((byte *)image->pixels[0], image->width*image->height);
continue; // used this sequence
}
if (!image->registration_sequence)
continue; // free texture
if (image->type == it_pic)
continue; // don't free pics
// free it
free (image->pixels[0]); // the other mip levels just follow
memset (image, 0, sizeof(*image));
}
}
/*
===============
R_InitImages
===============
*/
void R_InitImages (void)
{
registration_sequence = 1;
}
/*
===============
R_ShutdownImages
===============
*/
void R_ShutdownImages (void)
{
int i;
image_t *image;
for (i=0, image=r_images ; i<numr_images ; i++, image++)
{
if (!image->registration_sequence)
continue; // free texture
// free it
free (image->pixels[0]); // the other mip levels just follow
memset (image, 0, sizeof(*image));
}
}