VirtualTextureFeedbackResource.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "RHI.h"
 
class FRDGBuffer;
class FRDGBuilder;
class FViewUniformShaderParameters;
 
namespace VirtualTexture
{
    struct FFeedbackShaderParams
    {
        FRHIUnorderedAccessView* BufferUAV = nullptr;
        uint32 BufferSize = 0;
        uint32 TileShift = 0;
        uint32 TileMask = 0;
        uint32 TileJitterOffset = 0;
        uint32 SampleOffset = 0;
        uint32 ExtendedDebugBufferSize = 0;
    };
 
    RENDERER_API void BeginFeedback(FRDGBuilder& GraphBuilder, uint32 InBufferSize = 0, ERHIFeatureLevel::Type InFeatureLevel = GMaxRHIFeatureLevel);
 
    RENDERER_API void BeginFeedback(FRDGBuilder& GraphBuilder, FIntPoint InViewportSize, uint32 InVirtualTextureFeedbackTileSize, bool bInExtendFeedbackForDebug, ERHIFeatureLevel::Type InFeatureLevel);
 
    RENDERER_API void EndFeedback(FRDGBuilder& GraphBuilder);
 
    RENDERER_API void GetFeedbackShaderParams(int32 InFrameIndex, int32 InVirtualTextureFeedbackTileSize, FFeedbackShaderParams& OutParams);
    
    RENDERER_API void GetFeedbackShaderParams(FFeedbackShaderParams& OutParams);
    
    RENDERER_API void UpdateViewUniformShaderParameters(FFeedbackShaderParams const& InParams, FViewUniformShaderParameters& ViewUniformShaderParameters);
 
    FRDGBuffer* ResolveExtendedDebugBuffer(FRDGBuilder& GraphBuilder);
}