WindowsD3D11ConstantBuffer.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    WindowsD3D11ConstantBuffer.h: D3D Constant Buffer functions
=============================================================================*/
 
#pragma once
 
#include "D3D11ConstantBuffer.h"
#include "Windows/D3D11ThirdParty.h"
 
class FWinD3D11ConstantBuffer : public FD3D11ConstantBuffer
{
public:
    FWinD3D11ConstantBuffer(FD3D11DynamicRHI* InD3DRHI) :
        FD3D11ConstantBuffer(InD3DRHI)
    {
    }
 
    // FRenderResource interface.
    virtual void    InitRHI(FRHICommandListBase& RHICmdList) override;
    virtual void    ReleaseRHI() override;
 
    ID3D11Buffer* GetConstantBuffer() const
    {
        return SubBuffers[CurrentSubBuffer].Buffer.GetReference();
    }
 
    uint32 FindSubBufferForAllocationSize(uint64 InSize) const;
 
    bool CommitConstantsToDevice(bool bDiscardSharedConstants);
 
private:
    struct FSubBuffer
    {
        FSubBuffer(uint64 InSize) : Size(InSize) { }
        TRefCountPtr<ID3D11Buffer> Buffer;
        uint64 Size;
    };
    TArray<FSubBuffer> SubBuffers;
    uint32  CurrentSubBuffer = 0;
};