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Allow render_target_setter to restore the last target when destroyed

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This commit is contained in:
Charles Dang 2017-07-24 15:14:08 +11:00
parent dde06909f0
commit 8190d67152
1 changed files with 4 additions and 2 deletions
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6
src/sdl/render_utils.hpp
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@ -24,18 +24,19 @@
/**
* Sets the renderer output target to the specified texture.
* @todo: add support for restoring last target.
*/
class render_target_setter
{
public:
explicit render_target_setter(texture& t)
: renderer_(CVideo::get_singleton().get_renderer())
, last_target_(nullptr)
{
if(renderer_) {
// Validate we can render to this texture.
assert(t.get_info().access == SDL_TEXTUREACCESS_TARGET);
last_target_ = SDL_GetRenderTarget(renderer_);
SDL_SetRenderTarget(renderer_, t);
}
}
@ -43,12 +44,13 @@ public:
~render_target_setter()
{
if(renderer_) {
SDL_SetRenderTarget(renderer_, nullptr);
SDL_SetRenderTarget(renderer_, last_target_);
}
}
private:
SDL_Renderer* renderer_;
SDL_Texture* last_target_; // TODO: use the texture wrapper?
};
using sdl_rect_getter = void (*)(SDL_Renderer*, SDL_Rect*);