ScreenSpaceShadows.cpp File Reference

#include "ScreenSpaceShadows.h"
#include "LightSceneInfo.h"
#include "LightSceneProxy.h"
#include "ShadowRendering.h"
#include "SceneRendering.h"
#include "RenderGraphUtils.h"
#include "PixelShaderUtils.h"
#include "bend_sss_cpu.h"

Classes
class	FScreenSpaceShadowsCS
class	FScreenSpaceShadowsBendCS
class	FScreenSpaceShadowsUpsamplePS

Enumerations
enum class	ContactShadowsMethod { StochasticJittering = 0 , BendSSS = 1 }
enum class	EContactShadowsIntensityMode { PrimitiveFlag , DepthBasedApproximation , ForceCastingIntensity , MAX }

Functions
void	GetLightContactShadowParameters (const FLightSceneProxy *Proxy, float &OutLength, bool &bOutLengthInWS, float &OutCastingIntensity, float &OutNonCastingIntensity)
int32	GetScreenSpaceShadowDownsampleFactor ()
FIntPoint	GetBufferSizeForScreenSpaceShadows (const FViewInfo &View)
	IMPLEMENT_GLOBAL_SHADER (FScreenSpaceShadowsCS, "/Engine/Private/ScreenSpaceShadows.usf", "ScreenSpaceShadowsCS", SF_Compute)
	IMPLEMENT_GLOBAL_SHADER (FScreenSpaceShadowsBendCS, "/Engine/Private/ScreenSpaceShadows.usf", "ScreenSpaceShadowsBendCS", SF_Compute)
	IMPLEMENT_GLOBAL_SHADER (FScreenSpaceShadowsUpsamplePS, "/Engine/Private/ScreenSpaceShadows.usf", "ScreenSpaceShadowsUpsamplePS", SF_Pixel)
void	UpsampleScreenSpaceShadows (FRDGBuilder &GraphBuilder, const FMinimalSceneTextures &SceneTextures, const FViewInfo &View, FIntRect ScissorRect, bool bProjectingForForwardShading, const FLightSceneInfo *LightSceneInfo, FScreenPassTexture ShadowsTexture, int32 DownsampleFactor, FRDGTextureRef ScreenShadowMaskTexture)
void	RenderScreenSpaceShadows (FRDGBuilder &GraphBuilder, bool bAsyncCompute, const FMinimalSceneTextures &SceneTextures, const FViewInfo &View, FIntRect ScissorRect, bool bProjectingForForwardShading, const FLightSceneInfo *LightSceneInfo, FRDGTextureRef ScreenShadowMaskTexture)
void	RenderScreenSpaceShadowsBend (FRDGBuilder &GraphBuilder, bool bAsyncCompute, const FMinimalSceneTextures &SceneTextures, const FViewInfo &View, FIntRect ScissorRect, bool bProjectingForForwardShading, const FLightSceneInfo *LightSceneInfo, FRDGTextureRef ScreenShadowMaskTexture)
void	RenderScreenSpaceShadows (FRDGBuilder &GraphBuilder, const FMinimalSceneTextures &SceneTextures, const TArray< FViewInfo > &Views, const FLightSceneInfo *LightSceneInfo, bool bProjectingForForwardShading, FRDGTextureRef ScreenShadowMaskTexture)

Variables
const int32	GScreenSpaceShadowsTileSizeX = 8
const int32	GScreenSpaceShadowsTileSizeY = 8

Enumeration Type Documentation

ContactShadowsMethod

enum class ContactShadowsMethod

strong

Enumerator
StochasticJittering
BendSSS

EContactShadowsIntensityMode

enum class EContactShadowsIntensityMode

strong

Enumerator
PrimitiveFlag
DepthBasedApproximation
ForceCastingIntensity
MAX

Function Documentation

GetBufferSizeForScreenSpaceShadows()

FIntPoint GetBufferSizeForScreenSpaceShadows

(

const FViewInfo &

View

)

GetLightContactShadowParameters()

void GetLightContactShadowParameters ( const FLightSceneProxy *  Proxy, float &  OutLength, bool &  bOutLengthInWS, float &  OutCastingIntensity, float &  OutNonCastingIntensity  )

extern

GetScreenSpaceShadowDownsampleFactor()

int32 GetScreenSpaceShadowDownsampleFactor

(

)

IMPLEMENT_GLOBAL_SHADER() [1/3]

IMPLEMENT_GLOBAL_SHADER	(	FScreenSpaceShadowsBendCS	,
		"/Engine/Private/ScreenSpaceShadows.usf"	,
		"ScreenSpaceShadowsBendCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [2/3]

IMPLEMENT_GLOBAL_SHADER	(	FScreenSpaceShadowsCS	,
		"/Engine/Private/ScreenSpaceShadows.usf"	,
		"ScreenSpaceShadowsCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [3/3]

IMPLEMENT_GLOBAL_SHADER	(	FScreenSpaceShadowsUpsamplePS	,
		"/Engine/Private/ScreenSpaceShadows.usf"	,
		"ScreenSpaceShadowsUpsamplePS"	,
		SF_Pixel
	)

RenderScreenSpaceShadows() [1/2]

void RenderScreenSpaceShadows	(	FRDGBuilder &	GraphBuilder,
		bool	bAsyncCompute,
		const FMinimalSceneTextures &	SceneTextures,
		const FViewInfo &	View,
		FIntRect	ScissorRect,
		bool	bProjectingForForwardShading,
		const FLightSceneInfo *	LightSceneInfo,
		FRDGTextureRef	ScreenShadowMaskTexture
	)

RenderScreenSpaceShadows() [2/2]

void RenderScreenSpaceShadows	(	FRDGBuilder &	GraphBuilder,
		const FMinimalSceneTextures &	SceneTextures,
		const TArray< FViewInfo > &	Views,
		const FLightSceneInfo *	LightSceneInfo,
		bool	bProjectingForForwardShading,
		FRDGTextureRef	ScreenShadowMaskTexture
	)

RenderScreenSpaceShadowsBend()

void RenderScreenSpaceShadowsBend	(	FRDGBuilder &	GraphBuilder,
		bool	bAsyncCompute,
		const FMinimalSceneTextures &	SceneTextures,
		const FViewInfo &	View,
		FIntRect	ScissorRect,
		bool	bProjectingForForwardShading,
		const FLightSceneInfo *	LightSceneInfo,
		FRDGTextureRef	ScreenShadowMaskTexture
	)

UpsampleScreenSpaceShadows()

void UpsampleScreenSpaceShadows	(	FRDGBuilder &	GraphBuilder,
		const FMinimalSceneTextures &	SceneTextures,
		const FViewInfo &	View,
		FIntRect	ScissorRect,
		bool	bProjectingForForwardShading,
		const FLightSceneInfo *	LightSceneInfo,
		FScreenPassTexture	ShadowsTexture,
		int32	DownsampleFactor,
		FRDGTextureRef	ScreenShadowMaskTexture
	)

Variable Documentation

GScreenSpaceShadowsTileSizeX

const int32 GScreenSpaceShadowsTileSizeX = 8

GScreenSpaceShadowsTileSizeY

const int32 GScreenSpaceShadowsTileSizeY = 8