gui_null_graphics_context.h

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#pragma once
 
#include <gui_core/graphics/gui_graphics_context.h>
 
namespace tachyon
{

    class NullGraphicsContext : public GraphicsContext
    {
    public:
        NullGraphicsContext();
        ~NullGraphicsContext() override;
 
        GraphicsAPI GetAPI() const override { return GraphicsAPI::None; }
 
        void SetAllocationHooks(const AllocationHooks&) override {}
        Result<void> Initialize(IWindowBackend* windowBackend) override;
        void Cleanup() override;
        void BeginFrame() override;
        void EndFrame() override {}
 
        Image* CreateImage(void* data, uint2 size, ImageFormat format, Sampler sampler, bool mipmapped = false) override;
        void   DestroyImageAtEnd(Image* img, DeviceScope scope, const std::source_location& loc = std::source_location::current()) override;
 
        TextAtlasManager* CreateTextAtlasManager() override;
 
        IWindowContext* CreateWindowContext(void* nativeWindowHandle, OSWindowHandle osHandle, ID id, int2 size, WindowFlags windowFlags, OnGuiFunc onGui) override;
        void DestroyWindowContext(IWindowContext* context) override;
 
        ImageSet*  GetImageSet() const override;
        ImageIndex RegisterImage(Image* image) override;
        void       UnregisterImage(ImageIndex index) override;
 
        void PrepareFrame(StyleManager&, GradientManager&, float) override {}
 
    private:
        ImageSet* m_imageSet = nullptr;
    };

}