imguicontext.h

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#pragma once
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
#include "coregraphics/texture.h"
#include "coregraphics/buffer.h"
#include "coregraphics/resourcetable.h"
#include "input/inputevent.h"
#include "coregraphics/pipeline.h"
#include "graphics/graphicscontext.h"
#include "coregraphics/vertexlayout.h"
#include "imguiinputhandler.h"
#include "memory/arenaallocator.h"
#include "frame/framecode.h"
 
struct ImDrawData;
struct ImFont;
namespace Dynui
{
 
struct ImguiRendererParams
{
    IndexT projVar;
    IndexT fontVar;
};
 
struct ImguiTextureId
{
    CoreGraphics::TextureId nebulaHandle;
    uint8 layer = 0;
    uint8 mip = 0;
};
 
class ImguiContext : public Graphics::GraphicsContext
{
    __DeclarePluginContext();
public:
    ImguiContext();
    virtual ~ImguiContext();
 
    static void Create();
    static void Discard();
 
    static void SetRectSize(SizeT width, SizeT height);
    
    static bool HandleInput(const Input::InputEvent& event);
 
    static void OnWindowResized(const CoreGraphics::WindowId windowId, SizeT width, SizeT height);
    static void NewFrame(const Graphics::FrameContext& ctx);
    static void Render(const Graphics::FrameContext& ctx);
 
    struct ImguiState
    {
        ImguiRendererParams params;
        CoreGraphics::ShaderId uiShader;
        CoreGraphics::ShaderProgramId prog;
        CoreGraphics::PipelineId pipeline;
 
        ImguiTextureId fontTexture;
        //CoreGraphics::TextureId fontTexture;
 
        Util::FixedArray<CoreGraphics::BufferId> vbos;
        Util::FixedArray<CoreGraphics::BufferId> ibos;
        CoreGraphics::VertexLayoutId vlo;
 
        IndexT textureConstant;
        IndexT textProjectionConstant;
        IndexT packedTextureInfo;
        CoreGraphics::ResourceTableId resourceTable;
        //Ptr<CoreGraphics::BufferLock> vboBufferLock;
        //Ptr<CoreGraphics::BufferLock> iboBufferLock;
        Util::FixedArray<byte*> vertexPtrs;
        Util::FixedArray<byte*> indexPtrs;
 
        ImFont* normalFont;
        ImFont* smallFont;
        ImFont* boldFont;
        ImFont* itFont;
 
        Memory::ArenaAllocator<sizeof(Frame::FrameCode)> frameOpAllocator;
 
        Ptr<ImguiInputHandler> inputHandler;
        bool dockOverViewport;
    };
    static ImguiState state;
 
private:
    static void ImguiDrawFunction(const CoreGraphics::CmdBufferId cmdBuf);
    static void RecoverImGuiContextErrors();
};
 
} // namespace Dynui