SlatePostProcessResource.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Textures/SlateShaderResource.h"
#include "RenderResource.h"
#include "RenderDeferredCleanup.h"
 
class FSlatePostProcessResource : public FSlateShaderResource, public FRenderResource, private FDeferredCleanupInterface
{
public:
    FSlatePostProcessResource(int32 InRenderTargetCount);
    ~FSlatePostProcessResource();
 
    const FTextureRHIRef& GetRenderTarget(int32 Index)
    {
        return RenderTargets[Index]; 
    }
 
    void Update(const FIntPoint& NewSize, EPixelFormat RequestedPixelFormat);
 
    void CleanUp();
 
    virtual void InitRHI(FRHICommandListBase& RHICmdList) override;
    virtual void ReleaseRHI() override;
 
    virtual uint32 GetWidth() const override { return RenderTargetSize.X; }
    virtual uint32 GetHeight() const override { return RenderTargetSize.Y; }
    virtual ESlateShaderResource::Type GetType() const override { return ESlateShaderResource::PostProcess; }
 
    EPixelFormat GetPixelFormat() const { return PixelFormat; }
    uint64 GetFrameUsed() { return FrameUsed; }
 
private:
    void ResizeTargets(const FIntPoint& NewSize, EPixelFormat RequestedPixelFormat);
 
private:
    TArray<FTextureRHIRef, TInlineAllocator<2>> RenderTargets;
    EPixelFormat PixelFormat;
    FIntPoint RenderTargetSize;
    int32 RenderTargetCount;
    uint64 FrameUsed;
};