ReflectionEnvironment.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    Reflection Environment common declarations
=============================================================================*/
 
#pragma once
 
#include "CoreTypes.h"
#include "Math/Vector4.h"
#include "RenderGraphFwd.h"
#include "RHIFwd.h"
#include "ShaderParameterMacros.h"
 
class FSkyLightSceneProxy;
class FViewInfo;
struct FEngineShowFlags;
 
template<int32 MaxSHOrder> class TSHVectorRGB;
typedef TSHVectorRGB<3> FSHVectorRGB3;
 
extern bool IsReflectionEnvironmentAvailable(ERHIFeatureLevel::Type InFeatureLevel);
extern bool IsReflectionCaptureAvailable();
 
BEGIN_GLOBAL_SHADER_PARAMETER_STRUCT(FReflectionUniformParameters,)
    SHADER_PARAMETER(FVector4f, SkyLightParameters)
    SHADER_PARAMETER_RDG_TEXTURE(TextureCube, SkyLightCubemap)
    SHADER_PARAMETER_SAMPLER(SamplerState, SkyLightCubemapSampler)
    SHADER_PARAMETER_TEXTURE(TextureCube, SkyLightBlendDestinationCubemap)
    SHADER_PARAMETER_SAMPLER(SamplerState, SkyLightBlendDestinationCubemapSampler)
    SHADER_PARAMETER_TEXTURE(TextureCubeArray, ReflectionCubemap)
    SHADER_PARAMETER_SAMPLER(SamplerState, ReflectionCubemapSampler)
    SHADER_PARAMETER_TEXTURE(Texture2D, PreIntegratedGF)
    SHADER_PARAMETER_SAMPLER(SamplerState, PreIntegratedGFSampler)
END_GLOBAL_SHADER_PARAMETER_STRUCT()
 
extern void SetupReflectionUniformParameters(FRDGBuilder& GraphBuilder, const FViewInfo& View, FReflectionUniformParameters& OutParameters);
TRDGUniformBufferRef<FReflectionUniformParameters> CreateReflectionUniformBuffer(FRDGBuilder& GraphBuilder, const FViewInfo& View);
 
RENDERER_API void SetupSkyIrradianceEnvironmentMapConstantsFromSkyIrradiance(FVector4f* OutSkyIrradianceEnvironmentMap, const FSHVectorRGB3 SkyIrradiance);
 
extern void UpdateSkyIrradianceGpuBuffer(FRDGBuilder& GraphBuilder, const FEngineShowFlags& EngineShowFlags, const FSkyLightSceneProxy* SkyLight, TRefCountPtr<FRDGPooledBuffer>& Buffer);