core: frontend: emu_window: Add TextureMailbox class.

This commit is contained in:
bunnei 2020-02-13 22:10:20 -05:00
parent 571451bdfe
commit 0c82b00dfd
1 changed files with 41 additions and 0 deletions

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@ -12,6 +12,45 @@
namespace Core::Frontend {
struct Frame;
/**
* For smooth Vsync rendering, we want to always present the latest frame that the core generates,
* but also make sure that rendering happens at the pace that the frontend dictates. This is a
* helper class that the renderer can define to sync frames between the render thread and the
* presentation thread
*/
class TextureMailbox {
public:
virtual ~TextureMailbox() = default;
/**
* Recreate the render objects attached to this frame with the new specified width/height
*/
virtual void ReloadRenderFrame(Frontend::Frame* frame, u32 width, u32 height) = 0;
/**
* Recreate the presentation objects attached to this frame with the new specified width/height
*/
virtual void ReloadPresentFrame(Frontend::Frame* frame, u32 width, u32 height) = 0;
/**
* Render thread calls this to get an available frame to present
*/
virtual Frontend::Frame* GetRenderFrame() = 0;
/**
* Render thread calls this after draw commands are done to add to the presentation mailbox
*/
virtual void ReleaseRenderFrame(Frame* frame) = 0;
/**
* Presentation thread calls this to get the latest frame available to present. If there is no
* frame available after timeout, returns the previous frame. If there is no previous frame it
* returns nullptr
*/
virtual Frontend::Frame* TryGetPresentFrame(int timeout_ms) = 0;
};
/**
* Represents a graphics context that can be used for background computation or drawing. If the
* graphics backend doesn't require the context, then the implementation of these methods can be
@ -132,6 +171,8 @@ public:
*/
void UpdateCurrentFramebufferLayout(unsigned width, unsigned height);
std::unique_ptr<TextureMailbox> mailbox;
protected:
EmuWindow();
virtual ~EmuWindow();