LumenReSTIRGather.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "BlueNoise.h"
#include "LumenTracingUtils.h"
#include "ShaderParameterMacros.h"
 
BEGIN_SHADER_PARAMETER_STRUCT(FReservoirTextures, )
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, ReservoirRayDirection)
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, ReservoirTraceRadiance)
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, ReservoirTraceHitDistance)
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, ReservoirTraceHitNormal)
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, ReservoirWeights)
END_SHADER_PARAMETER_STRUCT()
 
BEGIN_SHADER_PARAMETER_STRUCT(FReservoirUAVs, )
    SHADER_PARAMETER_RDG_TEXTURE_UAV(RWTexture2D<float4>, RWReservoirRayDirection)
    SHADER_PARAMETER_RDG_TEXTURE_UAV(RWTexture2D<float3>, RWReservoirTraceRadiance)
    SHADER_PARAMETER_RDG_TEXTURE_UAV(RWTexture2D<float>, RWReservoirTraceHitDistance)
    SHADER_PARAMETER_RDG_TEXTURE_UAV(RWTexture2D<UNORM float3>, RWReservoirTraceHitNormal)
    SHADER_PARAMETER_RDG_TEXTURE_UAV(RWTexture2D<float3>, RWReservoirWeights)
END_SHADER_PARAMETER_STRUCT()
 
BEGIN_SHADER_PARAMETER_STRUCT(FReSTIRParameters, )
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, DownsampledSceneDepth)
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, DownsampledWorldNormal)
    SHADER_PARAMETER(uint32, ReservoirDownsampleFactor)
    SHADER_PARAMETER(FIntPoint, ReservoirViewSize)
    SHADER_PARAMETER(FIntPoint, ReservoirBufferSize)
    SHADER_PARAMETER(int32, FixedJitterIndex)
    SHADER_PARAMETER(float, ResamplingNormalDotThreshold)
    SHADER_PARAMETER(float, ResamplingDepthErrorThreshold)
    SHADER_PARAMETER_STRUCT_INCLUDE(FReservoirTextures, Textures)
    SHADER_PARAMETER_STRUCT_INCLUDE(FReservoirUAVs, UAVs)
    SHADER_PARAMETER_STRUCT_REF(FBlueNoise, BlueNoise)
END_SHADER_PARAMETER_STRUCT()