PostProcessAmbientOcclusion.cpp File Reference

#include "CompositionLighting/PostProcessAmbientOcclusion.h"
#include "CompositionLighting/CompositionLighting.h"
#include "DataDrivenShaderPlatformInfo.h"
#include "PostProcess/SceneFilterRendering.h"
#include "SceneTextureParameters.h"
#include "ScenePrivate.h"
#include "Substrate/Substrate.h"
#include "SystemTextures.h"
#include "ClearQuad.h"
#include "VariableRateShadingImageManager.h"

Classes
class	FAmbientOcclusionSetupPS
class	FAmbientOcclusionSmoothCS
class	FAmbientOcclusionPS
class	FAmbientOcclusionCS
class	FGTAOHorizonSearchAndIntegrateCS
class	FGTAOInnerIntegratePS
class	FGTAOHorizonSearchCS
class	FGTAOTemporalFilterCS
class	FGTAOSpatialFilterCS
class	FGTAOUpsamplePS

Functions
	DECLARE_GPU_STAT_NAMED (SSAOSetup, TEXT("ScreenSpace AO Setup"))
	DECLARE_GPU_STAT_NAMED (SSAO, TEXT("ScreenSpace AO"))
	DECLARE_GPU_STAT_NAMED (BasePassAO, TEXT("BasePass AO"))
	DECLARE_GPU_STAT_NAMED (SSAOSmooth, TEXT("SSAO smooth"))
	DECLARE_GPU_STAT_NAMED (GTAO_HorizonSearch, TEXT("GTAO HorizonSearch"))
	DECLARE_GPU_STAT_NAMED (GTAO_HorizonSearchIntegrate, TEXT("GTAO HorizonSearch And Integrate"))
	DECLARE_GPU_STAT_NAMED (GTAO_InnerIntegrate, TEXT("GTAO InnerIntegrate"))
	DECLARE_GPU_STAT_NAMED (GTAO_TemporalFilter, TEXT("GTAO Temportal Filter"))
	DECLARE_GPU_STAT_NAMED (GTAO_SpatialFilter, TEXT("GTAO Spatial Filter"))
	DECLARE_GPU_STAT_NAMED (GTAO_Upsample, TEXT("GTAO Upsample"))
FRDGTextureDesc	GetScreenSpaceAOTextureDesc (ERHIFeatureLevel::Type FeatureLevel, FIntPoint Extent)
FRDGTextureRef	CreateScreenSpaceAOTexture (FRDGBuilder &GraphBuilder, ERHIFeatureLevel::Type FeatureLevel, FIntPoint Extent)
FRDGTextureRef	GetScreenSpaceAOFallback (const FRDGSystemTextures &SystemTextures)
	END_SHADER_PARAMETER_STRUCT ()
FHZBParameters	GetHZBParametersForAO (FRDGBuilder &GraphBuilder, const FViewInfo &View, FIntPoint InputTextureSize, EAOTechnique AOTechnique)
	IMPLEMENT_GLOBAL_SHADER (FAmbientOcclusionSetupPS, "/Engine/Private/PostProcessAmbientOcclusion.usf", "MainSetupPS", SF_Pixel)
FScreenPassTexture	AddAmbientOcclusionSetupPass (FRDGBuilder &GraphBuilder, const FViewInfo &View, const FSSAOCommonParameters &CommonParameters, FScreenPassTexture Input)
	IMPLEMENT_GLOBAL_SHADER (FAmbientOcclusionSmoothCS, "/Engine/Private/PostProcessAmbientOcclusion.usf", "MainSSAOSmoothCS", SF_Compute)
void	AddAmbientOcclusionSmoothPass (FRDGBuilder &GraphBuilder, const FViewInfo &View, ESSAOType SSAOType, FScreenPassTexture Input, FScreenPassRenderTarget Output)
	IMPLEMENT_GLOBAL_SHADER (FAmbientOcclusionPS, "/Engine/Private/PostProcessAmbientOcclusion.usf", "MainPS", SF_Pixel)
	IMPLEMENT_GLOBAL_SHADER (FAmbientOcclusionCS, "/Engine/Private/PostProcessAmbientOcclusion.usf", "MainCS", SF_Compute)
FScreenPassRenderTarget	CreateAmbientOcclusionOutputTarget (FRDGBuilder &GraphBuilder, FRDGTextureDesc OutputDesc, FIntRect ViewRect, ESSAOType AOType, EPixelFormat IntermediateFormatOverride)
void	AddAmbientOcclusionPass (FRDGBuilder &GraphBuilder, const FViewInfo &View, const FSSAOCommonParameters &CommonParameters, const FScreenPassTexture &SetupTexture, const FScreenPassTexture &NormalsTexture, const FScreenPassTexture &DownsampledAO, FScreenPassRenderTarget Output, ESSAOType AOType, bool bAOSetupAsInput)
FScreenPassTexture	AddAmbientOcclusionStepPass (FRDGBuilder &GraphBuilder, const FViewInfo &View, const FSSAOCommonParameters &CommonParameters, const FScreenPassTexture &SetupTexture, const FScreenPassTexture &NormalsTexture, const FScreenPassTexture &DownsampledAO)
FScreenPassTexture	AddAmbientOcclusionFinalPass (FRDGBuilder &GraphBuilder, const FViewInfo &View, const FSSAOCommonParameters &CommonParameters, const FScreenPassTexture &SetupTexture, const FScreenPassTexture &NormalsTexture, const FScreenPassTexture &DownsampledAO, FScreenPassRenderTarget FinalOutput)
	IMPLEMENT_GLOBAL_SHADER (FGTAOHorizonSearchAndIntegrateCS, "/Engine/Private/PostProcessAmbientOcclusion.usf", "GTAOCombinedCS", SF_Compute)
FGTAOHorizonSearchOutputs	AddGTAOHorizonSearchIntegratePass (FRDGBuilder &GraphBuilder, const FViewInfo &View, const FGTAOCommonParameters &CommonParameters, FScreenPassTexture SceneDepth)
	IMPLEMENT_GLOBAL_SHADER (FGTAOInnerIntegratePS, "/Engine/Private/PostProcessAmbientOcclusion.usf", "GTAOInnerIntegratePS", SF_Pixel)
FScreenPassTexture	AddGTAOInnerIntegratePass (FRDGBuilder &GraphBuilder, const FViewInfo &View, const FGTAOCommonParameters &CommonParameters, FScreenPassTexture SceneDepth, FScreenPassTexture HorizonsTexture)
	IMPLEMENT_GLOBAL_SHADER (FGTAOHorizonSearchCS, "/Engine/Private/PostProcessAmbientOcclusion.usf", "HorizonSearchCS", SF_Compute)
FGTAOHorizonSearchOutputs	AddGTAOHorizonSearchPass (FRDGBuilder &GraphBuilder, const FViewInfo &View, const FGTAOCommonParameters &CommonParameters, FScreenPassTexture SceneDepth, FScreenPassRenderTarget HorizonOutput)
	IMPLEMENT_GLOBAL_SHADER (FGTAOTemporalFilterCS, "/Engine/Private/PostProcessAmbientOcclusion.usf", "GTAOTemporalFilterCS", SF_Compute)
FGTAOTemporalOutputs	AddGTAOTemporalPass (FRDGBuilder &GraphBuilder, const FViewInfo &View, const FGTAOCommonParameters &CommonParameters, FScreenPassTexture Input, FScreenPassTexture SceneDepth, FScreenPassTexture SceneVelocity, FScreenPassTexture HistoryColor, FScreenPassTextureViewport HistoryViewport)
	IMPLEMENT_GLOBAL_SHADER (FGTAOSpatialFilterCS, "/Engine/Private/PostProcessAmbientOcclusion.usf", "GTAOSpatialFilterCS", SF_Compute)
FScreenPassTexture	AddGTAOSpatialFilter (FRDGBuilder &GraphBuilder, const FViewInfo &View, const FGTAOCommonParameters &CommonParameters, FScreenPassTexture Input, FScreenPassTexture InputDepth, FScreenPassRenderTarget SuggestedOutput)
	IMPLEMENT_GLOBAL_SHADER (FGTAOUpsamplePS, "/Engine/Private/PostProcessAmbientOcclusion.usf", "GTAOUpsamplePS", SF_Pixel)
FScreenPassTexture	AddGTAOUpsamplePass (FRDGBuilder &GraphBuilder, const FViewInfo &View, FScreenPassTexture Input, FScreenPassTexture SceneDepth, FScreenPassRenderTarget Output)

Function Documentation

AddAmbientOcclusionFinalPass()

FScreenPassTexture AddAmbientOcclusionFinalPass	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		const FSSAOCommonParameters &	CommonParameters,
		const FScreenPassTexture &	SetupTexture,
		const FScreenPassTexture &	NormalsTexture,
		const FScreenPassTexture &	DownsampledAO,
		FScreenPassRenderTarget	FinalOutput
	)

AddAmbientOcclusionPass()

void AddAmbientOcclusionPass	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		const FSSAOCommonParameters &	CommonParameters,
		const FScreenPassTexture &	SetupTexture,
		const FScreenPassTexture &	NormalsTexture,
		const FScreenPassTexture &	DownsampledAO,
		FScreenPassRenderTarget	Output,
		ESSAOType	AOType,
		bool	bAOSetupAsInput
	)

AddAmbientOcclusionSetupPass()

FScreenPassTexture AddAmbientOcclusionSetupPass	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		const FSSAOCommonParameters &	CommonParameters,
		FScreenPassTexture	Input
	)

AddAmbientOcclusionSmoothPass()

void AddAmbientOcclusionSmoothPass	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		ESSAOType	SSAOType,
		FScreenPassTexture	Input,
		FScreenPassRenderTarget	Output
	)

AddAmbientOcclusionStepPass()

FScreenPassTexture AddAmbientOcclusionStepPass	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		const FSSAOCommonParameters &	CommonParameters,
		const FScreenPassTexture &	SetupTexture,
		const FScreenPassTexture &	NormalsTexture,
		const FScreenPassTexture &	DownsampledAO
	)

AddGTAOHorizonSearchIntegratePass()

FGTAOHorizonSearchOutputs AddGTAOHorizonSearchIntegratePass	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		const FGTAOCommonParameters &	CommonParameters,
		FScreenPassTexture	SceneDepth
	)

AddGTAOHorizonSearchPass()

FGTAOHorizonSearchOutputs AddGTAOHorizonSearchPass	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		const FGTAOCommonParameters &	CommonParameters,
		FScreenPassTexture	SceneDepth,
		FScreenPassRenderTarget	HorizonOutput
	)

AddGTAOInnerIntegratePass()

FScreenPassTexture AddGTAOInnerIntegratePass	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		const FGTAOCommonParameters &	CommonParameters,
		FScreenPassTexture	SceneDepth,
		FScreenPassTexture	HorizonsTexture
	)

AddGTAOSpatialFilter()

FScreenPassTexture AddGTAOSpatialFilter	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		const FGTAOCommonParameters &	CommonParameters,
		FScreenPassTexture	Input,
		FScreenPassTexture	InputDepth,
		FScreenPassRenderTarget	SuggestedOutput
	)

AddGTAOTemporalPass()

FGTAOTemporalOutputs AddGTAOTemporalPass	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		const FGTAOCommonParameters &	CommonParameters,
		FScreenPassTexture	Input,
		FScreenPassTexture	SceneDepth,
		FScreenPassTexture	SceneVelocity,
		FScreenPassTexture	HistoryColor,
		FScreenPassTextureViewport	HistoryViewport
	)

AddGTAOUpsamplePass()

FScreenPassTexture AddGTAOUpsamplePass	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		FScreenPassTexture	Input,
		FScreenPassTexture	SceneDepth,
		FScreenPassRenderTarget	Output
	)

CreateAmbientOcclusionOutputTarget()

FScreenPassRenderTarget CreateAmbientOcclusionOutputTarget	(	FRDGBuilder &	GraphBuilder,
		FRDGTextureDesc	OutputDesc,
		FIntRect	ViewRect,
		ESSAOType	AOType,
		EPixelFormat	IntermediateFormatOverride
	)

CreateScreenSpaceAOTexture()

FRDGTextureRef CreateScreenSpaceAOTexture	(	FRDGBuilder &	GraphBuilder,
		ERHIFeatureLevel::Type	FeatureLevel,
		FIntPoint	Extent
	)

DECLARE_GPU_STAT_NAMED() [1/10]

DECLARE_GPU_STAT_NAMED	(	BasePassAO	,
		TEXT("BasePass AO")
	)

DECLARE_GPU_STAT_NAMED() [2/10]

DECLARE_GPU_STAT_NAMED	(	GTAO_HorizonSearch	,
		TEXT("GTAO HorizonSearch")
	)

DECLARE_GPU_STAT_NAMED() [3/10]

DECLARE_GPU_STAT_NAMED	(	GTAO_HorizonSearchIntegrate	,
		TEXT("GTAO HorizonSearch And Integrate")
	)

DECLARE_GPU_STAT_NAMED() [4/10]

DECLARE_GPU_STAT_NAMED	(	GTAO_InnerIntegrate	,
		TEXT("GTAO InnerIntegrate")
	)

DECLARE_GPU_STAT_NAMED() [5/10]

DECLARE_GPU_STAT_NAMED	(	GTAO_SpatialFilter	,
		TEXT("GTAO Spatial Filter")
	)

DECLARE_GPU_STAT_NAMED() [6/10]

DECLARE_GPU_STAT_NAMED	(	GTAO_TemporalFilter	,
		TEXT("GTAO Temportal Filter")
	)

DECLARE_GPU_STAT_NAMED() [7/10]

DECLARE_GPU_STAT_NAMED	(	GTAO_Upsample	,
		TEXT("GTAO Upsample")
	)

DECLARE_GPU_STAT_NAMED() [8/10]

DECLARE_GPU_STAT_NAMED	(	SSAO	,
		TEXT("ScreenSpace AO")
	)

DECLARE_GPU_STAT_NAMED() [9/10]

DECLARE_GPU_STAT_NAMED	(	SSAOSetup	,
		TEXT("ScreenSpace AO Setup")
	)

DECLARE_GPU_STAT_NAMED() [10/10]

DECLARE_GPU_STAT_NAMED	(	SSAOSmooth	,
		TEXT("SSAO smooth")
	)

END_SHADER_PARAMETER_STRUCT()

END_SHADER_PARAMETER_STRUCT

(

)

Encapsulates the post processing ambient occlusion pixel shader.

Parameters

bAOSetupAsInput	true:use AO setup instead of full resolution depth and normal
bDoUpsample	true:we have lower resolution pass data we need to upsample, false otherwise
ShaderQuality	0..4, 0:low 4:high

GetHZBParametersForAO()

FHZBParameters GetHZBParametersForAO	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		FIntPoint	InputTextureSize,
		EAOTechnique	AOTechnique
	)

GetScreenSpaceAOFallback()

FRDGTextureRef GetScreenSpaceAOFallback

(

const FRDGSystemTextures &

SystemTextures

)

GetScreenSpaceAOTextureDesc()

FRDGTextureDesc GetScreenSpaceAOTextureDesc	(	ERHIFeatureLevel::Type	FeatureLevel,
		FIntPoint	Extent
	)

IMPLEMENT_GLOBAL_SHADER() [1/10]

IMPLEMENT_GLOBAL_SHADER	(	FAmbientOcclusionCS	,
		"/Engine/Private/PostProcessAmbientOcclusion.usf"	,
		"MainCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [2/10]

IMPLEMENT_GLOBAL_SHADER	(	FAmbientOcclusionPS	,
		"/Engine/Private/PostProcessAmbientOcclusion.usf"	,
		"MainPS"	,
		SF_Pixel
	)

IMPLEMENT_GLOBAL_SHADER() [3/10]

IMPLEMENT_GLOBAL_SHADER	(	FAmbientOcclusionSetupPS	,
		"/Engine/Private/PostProcessAmbientOcclusion.usf"	,
		"MainSetupPS"	,
		SF_Pixel
	)

IMPLEMENT_GLOBAL_SHADER() [4/10]

IMPLEMENT_GLOBAL_SHADER	(	FAmbientOcclusionSmoothCS	,
		"/Engine/Private/PostProcessAmbientOcclusion.usf"	,
		"MainSSAOSmoothCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [5/10]

IMPLEMENT_GLOBAL_SHADER	(	FGTAOHorizonSearchAndIntegrateCS	,
		"/Engine/Private/PostProcessAmbientOcclusion.usf"	,
		"GTAOCombinedCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [6/10]

IMPLEMENT_GLOBAL_SHADER	(	FGTAOHorizonSearchCS	,
		"/Engine/Private/PostProcessAmbientOcclusion.usf"	,
		"HorizonSearchCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [7/10]

IMPLEMENT_GLOBAL_SHADER	(	FGTAOInnerIntegratePS	,
		"/Engine/Private/PostProcessAmbientOcclusion.usf"	,
		"GTAOInnerIntegratePS"	,
		SF_Pixel
	)

IMPLEMENT_GLOBAL_SHADER() [8/10]

IMPLEMENT_GLOBAL_SHADER	(	FGTAOSpatialFilterCS	,
		"/Engine/Private/PostProcessAmbientOcclusion.usf"	,
		"GTAOSpatialFilterCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [9/10]

IMPLEMENT_GLOBAL_SHADER	(	FGTAOTemporalFilterCS	,
		"/Engine/Private/PostProcessAmbientOcclusion.usf"	,
		"GTAOTemporalFilterCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [10/10]

IMPLEMENT_GLOBAL_SHADER	(	FGTAOUpsamplePS	,
		"/Engine/Private/PostProcessAmbientOcclusion.usf"	,
		"GTAOUpsamplePS"	,
		SF_Pixel
	)