pandory500/SDL-mirror
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Reorganized the render target code, moving the viewport handling to the general code and adding software implementation.

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This commit is contained in:
Sam Lantinga 2012-01-21 22:22:30 -05:00
parent fb87e98b8a
commit da686e5bd4
7 changed files with 260 additions and 342 deletions
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110
src/render/SDL_render.c
View file

@ -106,11 +106,16 @@ SDL_RendererEventWatch(void *userdata, SDL_Event *event)
SDL_Rect viewport;
SDL_GetWindowSize(window, &w, &h);
viewport.x = (w - renderer->viewport.w) / 2;
viewport.y = (h - renderer->viewport.h) / 2;
viewport.w = renderer->viewport.w;
viewport.h = renderer->viewport.h;
SDL_RenderSetViewport(renderer, &viewport);
if (renderer->target) {
renderer->viewport_backup.x = (w - renderer->viewport_backup.w) / 2;
renderer->viewport_backup.y = (h - renderer->viewport_backup.h) / 2;
} else {
viewport.x = (w - renderer->viewport.w) / 2;
viewport.y = (h - renderer->viewport.h) / 2;
viewport.w = renderer->viewport.w;
viewport.h = renderer->viewport.h;
SDL_RenderSetViewport(renderer, &viewport);
}
} else if (event->window.event == SDL_WINDOWEVENT_MINIMIZED) {
renderer->minimized = SDL_TRUE;
} else if (event->window.event == SDL_WINDOWEVENT_RESTORED) {
@ -796,6 +801,72 @@ SDL_UnlockTexture(SDL_Texture * texture)
}
}
SDL_bool
SDL_RenderTargetSupported(SDL_Renderer *renderer)
{
if (!renderer || !renderer->SetTargetTexture) {
return SDL_FALSE;
}
return (renderer->info.flags & SDL_RENDERER_TARGETTEXTURE) != 0;
}
int
SDL_SetTargetTexture(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->SetTargetTexture(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_RenderSetViewport(SDL_Renderer * renderer, const SDL_Rect * rect)
{
@ -1150,35 +1221,6 @@ SDL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
format, pixels, pitch);
}
SDL_bool
SDL_RenderTargetSupported(SDL_Renderer *renderer)
{
if (!renderer || !renderer->SetTargetTexture) {
return SDL_FALSE;
}
return (renderer->info.flags & SDL_RENDERER_TARGETTEXTURE) != 0;
}
int
SDL_SetTargetTexture(SDL_Renderer *renderer, SDL_Texture *texture)
{
if(!renderer) {
return -1;
}
if (!renderer->SetTargetTexture) {
SDL_Unsupported();
return -1;
}
// Warning: texture==NULL is a valid parameter
if( texture ) {
CHECK_TEXTURE_MAGIC(texture, -1);
if(renderer != texture->renderer) return -1;
}
return renderer->SetTargetTexture(renderer, texture);
}
void
SDL_RenderPresent(SDL_Renderer * renderer)
{