LumenFrontLayerTranslucency.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "RendererInterface.h"
#include "RenderGraphResources.h"
 
struct FTiledReflection;
 
class FLumenFrontLayerTranslucency
{
public:
    FRDGTextureRef Radiance = nullptr;
    FRDGTextureRef Normal = nullptr;
    FRDGTextureRef SceneDepth = nullptr;
    bool bEnabled = false;
    float RelativeDepthThreshold = 0.0f;
};
 
struct FFrontLayerTranslucencyData
{
    bool IsValid() const { return SceneDepth != nullptr; }
    FRDGTextureRef SceneDepth = nullptr;
    FRDGTextureRef Normal = nullptr;
};
 
BEGIN_SHADER_PARAMETER_STRUCT(FLumenFrontLayerTranslucencyGBufferParameters, )
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, FrontLayerTranslucencyNormal)
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, FrontLayerTranslucencySceneDepth)
END_SHADER_PARAMETER_STRUCT()
 
// Used by Translucency Base Pass
BEGIN_SHADER_PARAMETER_STRUCT(FLumenFrontLayerTranslucencyReflectionParameters, )
    SHADER_PARAMETER_RDG_TEXTURE(Texture2DArray, Radiance)
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, Normal)
    SHADER_PARAMETER_RDG_TEXTURE(Texture2D, SceneDepth)
    SHADER_PARAMETER(uint32, Enabled)
    SHADER_PARAMETER(float, RelativeDepthThreshold)
    SHADER_PARAMETER(float, SpecularScale)
    SHADER_PARAMETER(float, Contrast)
END_SHADER_PARAMETER_STRUCT()
 
struct FLumenReflectionsConfig
{
    FTiledReflection* TiledReflection = nullptr;
    FIntPoint DownsampleFactorXY = -1;
    bool bScreenSpaceReconstruction = true;
    bool bDenoising = true;
    FLumenFrontLayerTranslucencyGBufferParameters FrontLayerReflectionGBuffer;
};