diff options
Diffstat (limited to 'src/core/frontend/emu_window.h')
-rw-r--r-- | src/core/frontend/emu_window.h | 44 |
1 files changed, 28 insertions, 16 deletions
diff --git a/src/core/frontend/emu_window.h b/src/core/frontend/emu_window.h index 5eb87fb63..bb283d844 100644 --- a/src/core/frontend/emu_window.h +++ b/src/core/frontend/emu_window.h @@ -13,19 +13,39 @@ namespace Core::Frontend { /** - * 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 - * stubs + * Represents a drawing context that supports graphics operations. */ class GraphicsContext { public: virtual ~GraphicsContext(); + /// Inform the driver to swap the front/back buffers and present the current image + virtual void SwapBuffers() {} + /// Makes the graphics context current for the caller thread - virtual void MakeCurrent() = 0; + virtual void MakeCurrent() {} /// Releases (dunno if this is the "right" word) the context from the caller thread - virtual void DoneCurrent() = 0; + virtual void DoneCurrent() {} + + class Scoped { + public: + Scoped(GraphicsContext& context_) : context(context_) { + context.MakeCurrent(); + } + ~Scoped() { + context.DoneCurrent(); + } + + private: + GraphicsContext& context; + }; + + /// Calls MakeCurrent on the context and calls DoneCurrent when the scope for the returned value + /// ends + Scoped Acquire() { + return Scoped{*this}; + } }; /** @@ -46,7 +66,7 @@ public: * - DO NOT TREAT THIS CLASS AS A GUI TOOLKIT ABSTRACTION LAYER. That's not what it is. Please * re-read the upper points again and think about it if you don't see this. */ -class EmuWindow : public GraphicsContext { +class EmuWindow { public: /// Data structure to store emuwindow configuration struct WindowConfig { @@ -60,17 +80,9 @@ public: virtual void PollEvents() = 0; /** - * Returns a GraphicsContext that the frontend provides that is shared with the emu window. This - * context can be used from other threads for background graphics computation. If the frontend - * is using a graphics backend that doesn't need anything specific to run on a different thread, - * then it can use a stubbed implemenation for GraphicsContext. - * - * If the return value is null, then the core should assume that the frontend cannot provide a - * Shared Context + * Returns a GraphicsContext that the frontend provides to be used for rendering. */ - virtual std::unique_ptr<GraphicsContext> CreateSharedContext() const { - return nullptr; - } + virtual std::unique_ptr<GraphicsContext> CreateSharedContext() const = 0; /// Returns if window is shown (not minimized) virtual bool IsShown() const = 0; |