ref: ebef2792109e2a0557fa960e538b190ac1902d27
dir: /src/texture.c/
/*
* Texture Manager
*/
#include "zgl.h"
static GLTexture* find_texture(GLint h) {
GLTexture* t;
GLContext* c = gl_get_context();
t = c->shared_state.texture_hash_table[h & TEXTURE_HASH_TABLE_MASK];
while (t != NULL) {
if (t->handle == h)
return t;
t = t->next;
}
return NULL;
}
GLboolean glAreTexturesResident(GLsizei n, const GLuint* textures, GLboolean* residences) {
#define RETVAL GL_FALSE
GLboolean retval = GL_TRUE;
GLint i;
#include "error_check_no_context.h"
for (i = 0; i < n; i++)
if (find_texture(textures[i])) {
residences[i] = GL_TRUE;
} else {
residences[i] = GL_FALSE;
retval = GL_FALSE;
}
return retval;
}
GLboolean glIsTexture(GLuint texture) {
GLContext* c = gl_get_context();
#define RETVAL GL_FALSE
#include "error_check.h"
if (find_texture(texture))
return GL_TRUE;
return GL_FALSE;
}
void* glGetTexturePixmap(GLint text, GLint level, GLint* xsize, GLint* ysize) {
GLTexture* tex;
GLContext* c = gl_get_context();
#if TGL_FEATURE_ERROR_CHECK == 1
if (!(text >= 0 && level < MAX_TEXTURE_LEVELS))
#define ERROR_FLAG GL_INVALID_ENUM
#define RETVAL NULL
#include "error_check.h"
#else
/*assert(text >= 0 && level < MAX_TEXTURE_LEVELS);*/
#endif
tex = find_texture(text);
if (!tex)
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_INVALID_ENUM
#define RETVAL NULL
#include "error_check.h"
#else
return NULL;
#endif
*xsize = tex->images[level].xsize;
*ysize = tex->images[level].ysize;
return tex->images[level].pixmap;
}
static void free_texture(GLContext* c, GLint h) {
GLTexture *t, **ht;
t = find_texture(h);
if (t->prev == NULL) {
ht = &c->shared_state.texture_hash_table[t->handle & TEXTURE_HASH_TABLE_MASK];
*ht = t->next;
} else {
t->prev->next = t->next;
}
if (t->next != NULL)
t->next->prev = t->prev;
gl_free(t);
}
GLTexture* alloc_texture(GLint h) {
GLContext* c = gl_get_context();
GLTexture *t, **ht;
#define RETVAL NULL
#include "error_check.h"
t = gl_zalloc(sizeof(GLTexture));
if (!t)
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_OUT_OF_MEMORY
#define RETVAL NULL
#include "error_check.h"
#else
gl_fatal_error("GL_OUT_OF_MEMORY");
#endif
ht = &c->shared_state.texture_hash_table[h & TEXTURE_HASH_TABLE_MASK];
t->next = *ht;
t->prev = NULL;
if (t->next != NULL)
t->next->prev = t;
*ht = t;
t->handle = h;
return t;
}
void glInitTextures() {
/* textures */
GLContext* c = gl_get_context();
c->texture_2d_enabled = 0;
c->current_texture = find_texture(0);
}
void glGenTextures(GLint n, GLuint* textures) {
GLContext* c = gl_get_context();
GLint max, i;
GLTexture* t;
#include "error_check.h"
max = 0;
for (i = 0; i < TEXTURE_HASH_TABLE_SIZE; i++) {
t = c->shared_state.texture_hash_table[i];
while (t != NULL) {
if (t->handle > max)
max = t->handle;
t = t->next;
}
}
for (i = 0; i < n; i++) {
textures[i] = max + i + 1; /* MARK: How texture handles are created.*/
}
}
void glDeleteTextures(GLint n, const GLuint* textures) {
GLint i;
GLTexture* t;
GLContext* c = gl_get_context();
#include "error_check.h"
for (i = 0; i < n; i++) {
t = find_texture(textures[i]);
if (t != NULL && t != 0) {
if (t == c->current_texture) {
glBindTexture(GL_TEXTURE_2D, 0);
#include "error_check.h"
}
free_texture(c, textures[i]);
}
}
}
void glopBindTexture(GLParam* p) {
GLint target = p[1].i;
GLint texture = p[2].i;
GLTexture* t;
GLContext* c = gl_get_context();
#if TGL_FEATURE_ERROR_CHECK == 1
if (!(target == GL_TEXTURE_2D && target > 0))
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
#endif
t = find_texture(texture);
if (t == NULL) {
t = alloc_texture(texture);
#include "error_check.h"
}
if (t == NULL) {
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_OUT_OF_MEMORY
#include "error_check.h"
#else
gl_fatal_error("GL_OUT_OF_MEMORY");
#endif
}
c->current_texture = t;
}
void glCopyTexImage2D(GLenum target,
GLint level,
GLenum internalformat,
GLint x,
GLint y,
GLsizei width,
GLsizei height, GLint border) {
GLParam p[9];
#include "error_check_no_context.h"
p[0].op = OP_CopyTexImage2D;
p[1].i = target;
p[2].i = level;
p[3].i = internalformat;
p[4].i = x;
p[5].i = y;
p[6].i = width;
p[7].i = height;
p[8].i = border;
gl_add_op(p);
}
void glopCopyTexImage2D(GLParam* p) {
GLImage* im;
PIXEL* data;
GLint i, j;
GLint target = p[1].i;
GLint level = p[2].i;
GLint x = p[4].i;
GLint y = p[5].i;
GLsizei w = p[6].i;
GLsizei h = p[7].i;
GLint border = p[8].i;
GLContext* c = gl_get_context();
y -= h;
if (c->readbuffer != GL_FRONT || c->current_texture == NULL || target != GL_TEXTURE_2D || border != 0 ||
w != TGL_FEATURE_TEXTURE_DIM || /*TODO Implement image interp*/
h != TGL_FEATURE_TEXTURE_DIM) {
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_INVALID_OPERATION
#include "error_check.h"
#else
return;
#endif
}
im = &c->current_texture->images[level];
data = c->current_texture->images[level].pixmap;
im->xsize = TGL_FEATURE_TEXTURE_DIM;
im->ysize = TGL_FEATURE_TEXTURE_DIM;
/* TODO implement the scaling and stuff that the GL spec says it should have.*/
#if TGL_FEATURE_MULTITHREADED_COPY_TEXIMAGE_2D == 1
#pragma omp parallel for
for (j = 0; j < h; j++)
for (i = 0; i < w; i++) {
data[i + j * w] = c->zb->pbuf[((i + x) % (c->zb->xsize)) + ((j + y) % (c->zb->ysize)) * (c->zb->xsize)];
}
#else
for (j = 0; j < h; j++)
for (i = 0; i < w; i++) {
data[i + j * w] = c->zb->pbuf[((i + x) % (c->zb->xsize)) + ((j + y) % (c->zb->ysize)) * (c->zb->xsize)];
}
#endif
}
void glopTexImage1D(GLParam* p) {
GLint target = p[1].i;
GLint level = p[2].i;
GLint components = p[3].i;
GLint width = p[4].i;
/* GLint height = p[5].i;*/
GLint height = 1;
GLint border = p[5].i;
GLint format = p[6].i;
GLint type = p[7].i;
void* pixels = p[8].p;
GLImage* im;
GLubyte* pixels1;
GLint do_free=0;
GLContext* c = gl_get_context();
{
#if TGL_FEATURE_ERROR_CHECK == 1
if (!(c->current_texture != NULL && target == GL_TEXTURE_1D && level == 0 && components == 3 && border == 0 && format == GL_RGB &&
type == GL_UNSIGNED_BYTE))
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
if (!(c->current_texture != NULL && target == GL_TEXTURE_1D && level == 0 && components == 3 && border == 0 && format == GL_RGB &&
type == GL_UNSIGNED_BYTE))
gl_fatal_error("glTexImage2D: combination of parameters not handled!!");
#endif
}
if (width != TGL_FEATURE_TEXTURE_DIM || height != TGL_FEATURE_TEXTURE_DIM) {
pixels1 = gl_malloc(TGL_FEATURE_TEXTURE_DIM * TGL_FEATURE_TEXTURE_DIM * 3); /* GUARDED*/
if (pixels1 == NULL) {
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_OUT_OF_MEMORY
#include "error_check.h"
#else
gl_fatal_error("GL_OUT_OF_MEMORY");
#endif
}
/* no GLinterpolation is done here to respect the original image aliasing ! */
gl_resizeImageNoInterpolate(pixels1, TGL_FEATURE_TEXTURE_DIM, TGL_FEATURE_TEXTURE_DIM, pixels, width, height);
do_free = 1;
width = TGL_FEATURE_TEXTURE_DIM;
height = TGL_FEATURE_TEXTURE_DIM;
} else {
pixels1 = pixels;
}
im = &c->current_texture->images[level];
im->xsize = width;
im->ysize = height;
#if TGL_FEATURE_RENDER_BITS == 32
gl_convertRGB_to_8A8R8G8B(im->pixmap, pixels1, width, height);
#elif TGL_FEATURE_RENDER_BITS == 16
gl_convertRGB_to_5R6G5B(im->pixmap, pixels1, width, height);
#else
#error bad TGL_FEATURE_RENDER_BITS
#endif
if (do_free)
gl_free(pixels1);
}
void glopTexImage2D(GLParam* p) {
GLint target = p[1].i;
GLint level = p[2].i;
GLint components = p[3].i;
GLint width = p[4].i;
GLint height = p[5].i;
GLint border = p[6].i;
GLint format = p[7].i;
GLint type = p[8].i;
void* pixels = p[9].p;
GLImage* im;
GLubyte* pixels1;
GLint do_free=0;
GLContext* c = gl_get_context();
{
#if TGL_FEATURE_ERROR_CHECK == 1
if (!(c->current_texture != NULL && target == GL_TEXTURE_2D && level == 0 && components == 3 && border == 0 && format == GL_RGB &&
type == GL_UNSIGNED_BYTE))
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
if (!(c->current_texture != NULL && target == GL_TEXTURE_2D && level == 0 && components == 3 && border == 0 && format == GL_RGB &&
type == GL_UNSIGNED_BYTE))
gl_fatal_error("glTexImage2D: combination of parameters not handled!!");
#endif
}
if (width != TGL_FEATURE_TEXTURE_DIM || height != TGL_FEATURE_TEXTURE_DIM) {
pixels1 = gl_malloc(TGL_FEATURE_TEXTURE_DIM * TGL_FEATURE_TEXTURE_DIM * 3); /* GUARDED*/
if (pixels1 == NULL) {
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_OUT_OF_MEMORY
#include "error_check.h"
#else
gl_fatal_error("GL_OUT_OF_MEMORY");
#endif
}
/* no GLinterpolation is done here to respect the original image aliasing ! */
gl_resizeImageNoInterpolate(pixels1, TGL_FEATURE_TEXTURE_DIM, TGL_FEATURE_TEXTURE_DIM, pixels, width, height);
do_free = 1;
width = TGL_FEATURE_TEXTURE_DIM;
height = TGL_FEATURE_TEXTURE_DIM;
} else {
pixels1 = pixels;
}
im = &c->current_texture->images[level];
im->xsize = width;
im->ysize = height;
#if TGL_FEATURE_RENDER_BITS == 32
gl_convertRGB_to_8A8R8G8B(im->pixmap, pixels1, width, height);
#elif TGL_FEATURE_RENDER_BITS == 16
gl_convertRGB_to_5R6G5B(im->pixmap, pixels1, width, height);
#else
#error Bad TGL_FEATURE_RENDER_BITS
#endif
if (do_free)
gl_free(pixels1);
}
/* TODO: not all tests are done */
/*
void glopTexEnv(GLContext* c, GLParam* p) {
GLint target = p[1].i;
GLint pname = p[2].i;
GLint param = p[3].i;
if (target != GL_TEXTURE_ENV) {
error:
#if TGL_FEATURE_ERROR_CHECK == 1
#define ERROR_FLAG GL_INVALID_ENUM
#include "error_check.h"
#else
gl_fatal_error("glTexParameter: unsupported option");
#endif
}
if (pname != GL_TEXTURE_ENV_MODE)
goto error;
if (param != GL_DECAL)
goto error;
}
*/
/* TODO: not all tests are done */
/*
void glopTexParameter(GLContext* c, GLParam* p) {
GLint target = p[1].i;
GLint pname = p[2].i;
GLint param = p[3].i;
if (target != GL_TEXTURE_2D &&
target != GL_TEXTURE_1D) {
error:
tgl_warning("glTexParameter: unsupported option");
return;
}
switch (pname) {
case GL_TEXTURE_WRAP_S:
case GL_TEXTURE_WRAP_T:
if (param != GL_REPEAT)
goto error;
break;
}
}
*/
/*
void glopPixelStore(GLContext* c, GLParam* p) {
GLint pname = p[1].i;
GLint param = p[2].i;
if (pname != GL_UNPACK_ALIGNMENT || param != 1) {
gl_fatal_error("glPixelStore: unsupported option");
}
}
*/