static void
GLES2_DestroyRenderer(SDL_Renderer *renderer)
{
GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
GLES2_ProgramCacheEntry *entry;
GLES2_ProgramCacheEntry *next;
/* Deallocate everything */
if (rdata) {
GLES2_ActivateRenderer(renderer);
entry = rdata->program_cache.head;
while (entry) {
glDeleteShader(entry->vertex_shader->id);
glDeleteShader(entry->fragment_shader->id);
SDL_free(entry->vertex_shader);
SDL_free(entry->fragment_shader);
glDeleteProgram(entry->id);
next = entry->next;
SDL_free(entry);
entry = next;
}
if (rdata->context) {
SDL_GL_DeleteContext(rdata->context);
}
if (rdata->shader_formats) {
SDL_free(rdata->shader_formats);
}
SDL_free(rdata);
}
SDL_free(renderer);
}
static void
GLES2_DestroyRenderer(SDL_Renderer *renderer)
{
GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
/* Deallocate everything */
if (rdata) {
GLES2_ActivateRenderer(renderer);
{
GLES2_ShaderCacheEntry *entry;
GLES2_ShaderCacheEntry *next;
entry = rdata->shader_cache.head;
while (entry)
{
rdata->glDeleteShader(entry->id);
next = entry->next;
SDL_free(entry);
entry = next;
}
}
{
GLES2_ProgramCacheEntry *entry;
GLES2_ProgramCacheEntry *next;
entry = rdata->program_cache.head;
while (entry) {
rdata->glDeleteProgram(entry->id);
next = entry->next;
SDL_free(entry);
entry = next;
}
}
if (rdata->context) {
while (rdata->framebuffers) {
GLES2_FBOList *nextnode = rdata->framebuffers->next;
rdata->glDeleteFramebuffers(1, &rdata->framebuffers->FBO);
SDL_free(rdata->framebuffers);
rdata->framebuffers = nextnode;
}
SDL_GL_DeleteContext(rdata->context);
}
if (rdata->shader_formats) {
SDL_free(rdata->shader_formats);
}
SDL_free(rdata);
}
SDL_free(renderer);
}
static void
GLES2_DestroyTexture(SDL_Renderer *renderer, SDL_Texture *texture)
{
GLES2_TextureData *tdata = (GLES2_TextureData *)texture->driverdata;
GLES2_ActivateRenderer(renderer);
/* Destroy the texture */
if (tdata)
{
glDeleteTextures(1, &tdata->texture);
SDL_free(tdata->pixel_data);
SDL_free(tdata);
texture->driverdata = NULL;
}
}
static int
GLES2_UpdateTexture(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect,
const void *pixels, int pitch)
{
GLES2_TextureData *tdata = (GLES2_TextureData *)texture->driverdata;
Uint8 *blob = NULL;
Uint8 *src;
int srcPitch;
int y;
GLES2_ActivateRenderer(renderer);
/* Bail out if we're supposed to update an empty rectangle */
if (rect->w <= 0 || rect->h <= 0)
return 0;
/* Reformat the texture data into a tightly packed array */
srcPitch = rect->w * SDL_BYTESPERPIXEL(texture->format);
src = (Uint8 *)pixels;
if (pitch != srcPitch)
{
blob = (Uint8 *)SDL_malloc(srcPitch * rect->h);
if (!blob)
{
SDL_OutOfMemory();
return -1;
}
src = blob;
for (y = 0; y < rect->h; ++y)
{
SDL_memcpy(src, pixels, srcPitch);
src += srcPitch;
pixels = (Uint8 *)pixels + pitch;
}
src = blob;
}
/* Create a texture subimage with the supplied data */
glGetError();
glActiveTexture(GL_TEXTURE0);
glBindTexture(tdata->texture_type, tdata->texture);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexSubImage2D(tdata->texture_type,
0,
rect->x,
rect->y,
rect->w,
rect->h,
tdata->pixel_format,
tdata->pixel_type,
src);
if (blob) {
SDL_free(blob);
}
if (glGetError() != GL_NO_ERROR)
{
SDL_SetError("Failed to update texture");
return -1;
}
return 0;
}
static int
GLES2_CreateTexture(SDL_Renderer *renderer, SDL_Texture *texture)
{
GLES2_TextureData *tdata;
GLenum format;
GLenum type;
GLenum scaleMode;
GLES2_ActivateRenderer(renderer);
/* Determine the corresponding GLES texture format params */
switch (texture->format)
{
case SDL_PIXELFORMAT_ABGR8888:
format = GL_RGBA;
type = GL_UNSIGNED_BYTE;
break;
default:
SDL_SetError("Texture format not supported");
return -1;
}
/* Allocate a texture struct */
tdata = (GLES2_TextureData *)SDL_calloc(1, sizeof(GLES2_TextureData));
if (!tdata)
{
SDL_OutOfMemory();
return -1;
}
tdata->texture = 0;
tdata->texture_type = GL_TEXTURE_2D;
tdata->pixel_format = format;
tdata->pixel_type = type;
scaleMode = GetScaleQuality();
/* Allocate a blob for image data */
if (texture->access == SDL_TEXTUREACCESS_STREAMING)
{
tdata->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
tdata->pixel_data = SDL_calloc(1, tdata->pitch * texture->h);
if (!tdata->pixel_data)
{
SDL_OutOfMemory();
SDL_free(tdata);
return -1;
}
}
/* Allocate the texture */
glGetError();
glGenTextures(1, &tdata->texture);
glActiveTexture(GL_TEXTURE0);
glBindTexture(tdata->texture_type, tdata->texture);
glTexParameteri(tdata->texture_type, GL_TEXTURE_MIN_FILTER, scaleMode);
glTexParameteri(tdata->texture_type, GL_TEXTURE_MAG_FILTER, scaleMode);
glTexParameteri(tdata->texture_type, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(tdata->texture_type, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(tdata->texture_type, 0, format, texture->w, texture->h, 0, format, type, NULL);
if (glGetError() != GL_NO_ERROR)
{
SDL_SetError("Texture creation failed");
glDeleteTextures(1, &tdata->texture);
SDL_free(tdata);
return -1;
}
texture->driverdata = tdata;
return 0;
}
