PostProcessing.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "RenderGraphFwd.h"
#include "RHIFwd.h"
#include "TranslucentRendering.h"
#include "PathTracing.h"
#include "PostProcess/PostProcessInputs.h"
 
enum class EReflectionsMethod;
enum class EDiffuseIndirectMethod;
 
class FScreenPassVS;
class FViewInfo;
class FVirtualShadowMapArray;
 
namespace Nanite
{
    struct FRasterResults;
}
 
// Returns whether the full post process pipeline is enabled. Otherwise, the minimal set of operations are performed.
bool IsPostProcessingEnabled(const FViewInfo& View);
 
// Returns whether the post process pipeline supports using compute passes.
bool IsPostProcessingWithComputeEnabled(ERHIFeatureLevel::Type FeatureLevel);
 
// Returns whether the post process pipeline supports propagating the alpha channel.
bool IsPostProcessingWithAlphaChannelSupported();
 
using FPostProcessVS = FScreenPassVS;
 
void AddPostProcessingPasses(
    FRDGBuilder& GraphBuilder,
    const FViewInfo& View, int32 ViewIndex,
    FSceneUniformBuffer& SceneUniformBuffer,
    EDiffuseIndirectMethod DiffuseIndirectMethod,
    EReflectionsMethod ReflectionsMethod,
    const FPostProcessingInputs& Inputs,
    const Nanite::FRasterResults* NaniteRasterResults,
    FInstanceCullingManager& InstanceCullingManager,
    FVirtualShadowMapArray* VirtualShadowMapArray,
    struct FLumenSceneFrameTemporaries& LumenFrameTemporaries,
    const FSceneWithoutWaterTextures& SceneWithoutWaterTextures,
    FScreenPassTexture TSRFlickeringInput,
    FRDGTextureRef& InstancedEditorDepthTexture);
 
void AddDebugViewPostProcessingPasses(
    FRDGBuilder& GraphBuilder, 
    const FViewInfo& View, 
    int32 ViewIndex,
    FSceneUniformBuffer& SceneUniformBuffer, 
    const FPostProcessingInputs& Inputs, 
    const Nanite::FRasterResults* NaniteRasterResults, 
    FVirtualShadowMapArray* VirtualShadowMapArray);
 
void AddVisualizeCalibrationMaterialPostProcessingPasses(FRDGBuilder& GraphBuilder, const FViewInfo& View, const FPostProcessingInputs& Inputs, const UMaterialInterface* InMaterialInterface);
 
struct FMobilePostProcessingInputs
{
    TRDGUniformBufferRef<FMobileSceneTextureUniformParameters> SceneTextures = nullptr;
    FRDGTextureRef ViewFamilyTexture = nullptr;
    FRDGTextureRef ViewFamilyDepthTexture = nullptr;
 
    void Validate() const
    {
        check(ViewFamilyTexture);
        check(SceneTextures);
    }
};
 
void AddMobilePostProcessingPasses(FRDGBuilder& GraphBuilder, FScene* Scene, const FViewInfo& View, int32 ViewIndex, FSceneUniformBuffer &SceneUniformBuffer, const FMobilePostProcessingInputs& Inputs, FInstanceCullingManager& InstanceCullingManager);
 
void AddBasicPostProcessPasses(FRDGBuilder& GraphBuilder, const FViewInfo& View);
 
FRDGTextureRef AddProcessPlanarReflectionPass(FRDGBuilder& GraphBuilder, const FViewInfo& View, FRDGTextureRef SceneColorTexture);