int
SDL_SetRenderTarget(SDL_Renderer *renderer, SDL_Texture *texture)
{
SDL_Rect viewport;
if (!SDL_RenderTargetSupported(renderer)) {
SDL_Unsupported();
return -1;
}
if (texture == renderer->target) {
/* Nothing to do! */
return 0;
}
/* texture == NULL is valid and means reset the target to the window */
if (texture) {
CHECK_TEXTURE_MAGIC(texture, -1);
if (renderer != texture->renderer) {
SDL_SetError("Texture was not created with this renderer");
return -1;
}
if (!(texture->access & SDL_TEXTUREACCESS_TARGET)) {
SDL_SetError("Texture not created with SDL_TEXTUREACCESS_TARGET");
return -1;
}
if (texture->native) {
/* Always render to the native texture */
texture = texture->native;
}
}
if (texture && !renderer->target) {
/* Make a backup of the viewport */
renderer->viewport_backup = renderer->viewport;
}
renderer->target = texture;
if (renderer->SetRenderTarget(renderer, texture) < 0) {
return -1;
}
if (texture) {
viewport.x = 0;
viewport.y = 0;
viewport.w = texture->w;
viewport.h = texture->h;
} else {
viewport = renderer->viewport_backup;
}
if (SDL_RenderSetViewport(renderer, &viewport) < 0) {
return -1;
}
/* All set! */
return 0;
}
int
SDL_SetRenderTarget(SDL_Renderer *renderer, SDL_Texture *texture)
{
if (!SDL_RenderTargetSupported(renderer)) {
return SDL_Unsupported();
}
if (texture == renderer->target) {
/* Nothing to do! */
return 0;
}
/* texture == NULL is valid and means reset the target to the window */
if (texture) {
CHECK_TEXTURE_MAGIC(texture, -1);
if (renderer != texture->renderer) {
return SDL_SetError("Texture was not created with this renderer");
}
if (texture->access != SDL_TEXTUREACCESS_TARGET) {
return SDL_SetError("Texture not created with SDL_TEXTUREACCESS_TARGET");
}
if (texture->native) {
/* Always render to the native texture */
texture = texture->native;
}
}
if (texture && !renderer->target) {
/* Make a backup of the viewport */
renderer->viewport_backup = renderer->viewport;
renderer->clip_rect_backup = renderer->clip_rect;
renderer->scale_backup = renderer->scale;
renderer->logical_w_backup = renderer->logical_w;
renderer->logical_h_backup = renderer->logical_h;
}
renderer->target = texture;
if (renderer->SetRenderTarget(renderer, texture) < 0) {
return -1;
}
if (texture) {
renderer->viewport.x = 0;
renderer->viewport.y = 0;
renderer->viewport.w = texture->w;
renderer->viewport.h = texture->h;
renderer->scale.x = 1.0f;
renderer->scale.y = 1.0f;
renderer->logical_w = texture->w;
renderer->logical_h = texture->h;
} else {
renderer->viewport = renderer->viewport_backup;
renderer->clip_rect = renderer->clip_rect_backup;
renderer->scale = renderer->scale_backup;
renderer->logical_w = renderer->logical_w_backup;
renderer->logical_h = renderer->logical_h_backup;
}
if (renderer->UpdateViewport(renderer) < 0) {
return -1;
}
if (renderer->UpdateClipRect(renderer) < 0) {
return -1;
}
/* All set! */
return 0;
}
