MegaLights.cpp File Reference

#include "MegaLights.h"
#include "MegaLightsInternal.h"
#include "RendererPrivate.h"
#include "PixelShaderUtils.h"
#include "BasePassRendering.h"
#include "VolumetricFogShared.h"
#include "Shadows/ShadowSceneRenderer.h"
#include "HairStrands/HairStrandsData.h"
#include "StochasticLighting/StochasticLighting.h"

Classes
class	FMegaLightsTileClassificationBuildListsCS
class	FInitTileIndirectArgsCS
struct	FMegaLightsFrameTemporaries

Namespaces
namespace	MegaLights
namespace	MegaLightsVolume
namespace	MegaLightsTranslucencyVolume

Functions
bool	MegaLights::ShouldCompileShaders (EShaderPlatform ShaderPlatform)
bool	MegaLights::IsRequested (const FSceneViewFamily &ViewFamily)
bool	MegaLights::HasRequiredTracingData (const FSceneViewFamily &ViewFamily)
bool	MegaLights::IsEnabled (const FSceneViewFamily &ViewFamily)
EPixelFormat	MegaLights::GetLightingDataFormat ()
uint32	MegaLights::GetSampleMargin ()
bool	MegaLights::UseVolume ()
bool	MegaLights::UseTranslucencyVolume ()
bool	MegaLights::IsTranslucencyVolumeSpatialFilterEnabled ()
bool	MegaLights::IsTranslucencyVolumeTemporalFilterEnabled ()
bool	MegaLights::IsMarkingVSMPages ()
bool	MegaLights::IsUsingLightFunctions (const FSceneViewFamily &ViewFamily)
bool	MegaLights::IsUsingLightingChannels ()
EMegaLightsMode	MegaLights::GetMegaLightsMode (const FSceneViewFamily &ViewFamily, uint8 LightType, bool bLightAllowsMegaLights, TEnumAsByte< EMegaLightsShadowMethod::Type > ShadowMethod)
bool	MegaLights::ShouldCompileShadersForReferenceMode (EShaderPlatform InPlatform)
uint32	MegaLights::GetReferenceShadingPassCount (EShaderPlatform InPlatform)
uint32	MegaLights::GetStateFrameIndex (FSceneViewState *ViewState, EShaderPlatform InPlatform)
FIntPoint	MegaLights::GetDownsampleFactorXY (EMegaLightsInput InputType, EShaderPlatform ShaderPlatform)
FIntPoint	MegaLights::GetDownsampleFactorXY (StochasticLighting::EMaterialSource MaterialSource, EShaderPlatform ShaderPlatform)
FIntPoint	MegaLights::GetNumSamplesPerPixel2d (int32 NumSamplesPerPixel1d)
FIntPoint	MegaLights::GetNumSamplesPerPixel2d (EMegaLightsInput InputType)
FIntVector	MegaLights::GetNumSamplesPerVoxel3d (int32 NumSamplesPerVoxel1d)
int32	MegaLights::GetVisualizeLightLoopIterationsMode ()
int32	MegaLights::GetDebugMode (EMegaLightsInput InputType)
bool	MegaLights::IsDebugEnabledForShadingPass (int32 ShadingPassIndex, EShaderPlatform InPlatform)
bool	MegaLights::SupportsSpatialFilter (EMegaLightsInput InputType)
bool	MegaLights::UseWaveOps (EShaderPlatform ShaderPlatform)
void	MegaLights::ModifyCompilationEnvironment (EShaderPlatform Platform, FShaderCompilerEnvironment &OutEnvironment)
const TCHAR *	MegaLights::GetTileTypeString (ETileType TileType)
bool	MegaLights::IsRectLightTileType (ETileType TileType)
bool	MegaLights::IsTexturedLightTileType (ETileType TileType)
bool	MegaLights::IsComplexTileType (ETileType TileType)
TArray< int32 >	MegaLights::GetShadingTileTypes (EMegaLightsInput InputType)
void	MegaLights::SetupTileClassifyParameters (const FViewInfo &View, MegaLights::FTileClassifyParameters &OutParameters)
uint32	MegaLightsVolume::GetDownsampleFactor (EShaderPlatform ShaderPlatform)
FIntVector	MegaLightsVolume::GetNumSamplesPerVoxel3d ()
bool	MegaLightsVolume::UsesLightFunction ()
int32	MegaLightsVolume::GetDebugMode ()
uint32	MegaLightsTranslucencyVolume::GetDownsampleFactor (EShaderPlatform ShaderPlatform)
FIntVector	MegaLightsTranslucencyVolume::GetNumSamplesPerVoxel3d ()
bool	MegaLightsTranslucencyVolume::UsesLightFunction ()
int32	MegaLightsTranslucencyVolume::GetDebugMode ()
	IMPLEMENT_GLOBAL_SHADER (FMegaLightsTileClassificationBuildListsCS, "/Engine/Private/MegaLights/MegaLights.usf", "MegaLightsTileClassificationBuildListsCS", SF_Compute)
	IMPLEMENT_GLOBAL_SHADER (FInitTileIndirectArgsCS, "/Engine/Private/MegaLights/MegaLights.usf", "InitTileIndirectArgsCS", SF_Compute)
	DECLARE_GPU_STAT (MegaLights)
int32	GetTranslucencyLightingVolumeDim ()
FIntVector	GetVolumeResourceGridSize (const FViewInfo &View, int32 &OutGridPixelSize)
FIntVector	GetVolumeViewGridSize (const FViewInfo &View, int32 &OutGridPixelSize)
FVector2f	GetVolumeUVMaxForSampling (const FVector2f &ViewRectSize, FIntVector ResourceGridSize, int32 ResourceGridPixelSize)
FVector2f	GetVolumePrevUVMaxForTemporalBlend (const FVector2f &ViewRectSize, FIntVector VolumeResourceGridSize, int32 VolumeResourceGridPixelSize)
FVector2f	GetVolumeFroxelToScreenSVPosRatio (const FViewInfo &View)
void	SetupMegaLightsVolumeData (const FViewInfo &View, bool bShouldRenderVolumetricFog, bool bShouldRenderTranslucencyVolume, FMegaLightsVolumeData &Parameters)
bool	MegaLights::IsMissingDirectionalLightData (const FSceneViewFamily &ViewFamily)
bool	MegaLights::HasWarning (const FSceneViewFamily &ViewFamily)
void	MegaLights::WriteWarnings (const FSceneViewFamily &ViewFamily, FScreenMessageWriter &Writer)

Variables
int32	GMegaLightsReset = 0
FAutoConsoleVariableRef	CVarMegaLightsReset (TEXT("r.MegaLights.Reset"), GMegaLightsReset, TEXT("Reset history for debugging."), ECVF_RenderThreadSafe)
int32	GMegaLightsResetEveryNthFrame = 0
FAutoConsoleVariableRef	CVarMegaLightsResetEveryNthFrame (TEXT("r.MegaLights.ResetEveryNthFrame"), GMegaLightsResetEveryNthFrame, TEXT("Reset history every Nth frame for debugging."), ECVF_RenderThreadSafe)
int32	GMegaLightsDefaultShadowMethod = 0
FAutoConsoleVariableRef	CMegaLightsDefaultShadowMethod (TEXT("r.MegaLights.DefaultShadowMethod"), GMegaLightsDefaultShadowMethod, TEXT("1 - Virtual Shadow Maps. Has a significant per light cost, but can cast shadows directly from the Nanite geometry using rasterization."), ECVF_RenderThreadSafe)
int32	GUseTranslucencyLightingVolumes
constexpr int32	MegaLights::TileSize = TILE_SIZE
constexpr int32	MegaLights::VisibleLightHashSize = VISIBLE_LIGHT_HASH_SIZE
constexpr int32	MegaLights::VisibleLightHashTileSize = VISIBLE_LIGHT_HASH_TILE_SIZE

Function Documentation

DECLARE_GPU_STAT()

DECLARE_GPU_STAT

(

MegaLights

)

GetTranslucencyLightingVolumeDim()

int32 GetTranslucencyLightingVolumeDim ( )

extern

Function returning current translucency lighting volume dimensions.

GetVolumeFroxelToScreenSVPosRatio()

FVector2f GetVolumeFroxelToScreenSVPosRatio

(

const FViewInfo &

View

)

GetVolumePrevUVMaxForTemporalBlend()

FVector2f GetVolumePrevUVMaxForTemporalBlend	(	const FVector2f &	ViewRectSize,
		FIntVector	VolumeResourceGridSize,
		int32	VolumeResourceGridPixelSize
	)

GetVolumeResourceGridSize()

FIntVector GetVolumeResourceGridSize	(	const FViewInfo &	View,
		int32 &	OutGridPixelSize
	)

GetVolumeUVMaxForSampling()

FVector2f GetVolumeUVMaxForSampling	(	const FVector2f &	ViewRectSize,
		FIntVector	ResourceGridSize,
		int32	ResourceGridPixelSize
	)

GetVolumeViewGridSize()

FIntVector GetVolumeViewGridSize	(	const FViewInfo &	View,
		int32 &	OutGridPixelSize
	)

IMPLEMENT_GLOBAL_SHADER() [1/2]

IMPLEMENT_GLOBAL_SHADER	(	FInitTileIndirectArgsCS	,
		"/Engine/Private/MegaLights/MegaLights.usf"	,
		"InitTileIndirectArgsCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [2/2]

IMPLEMENT_GLOBAL_SHADER	(	FMegaLightsTileClassificationBuildListsCS	,
		"/Engine/Private/MegaLights/MegaLights.usf"	,
		"MegaLightsTileClassificationBuildListsCS"	,
		SF_Compute
	)

SetupMegaLightsVolumeData()

void SetupMegaLightsVolumeData	(	const FViewInfo &	View,
		bool	bShouldRenderVolumetricFog,
		bool	bShouldRenderTranslucencyVolume,
		FMegaLightsVolumeData &	Parameters
	)

Variable Documentation

CMegaLightsDefaultShadowMethod

FAutoConsoleVariableRef CMegaLightsDefaultShadowMethod(TEXT("r.MegaLights.DefaultShadowMethod"), GMegaLightsDefaultShadowMethod, TEXT("1 - Virtual Shadow Maps. Has a significant per light cost, but can cast shadows directly from the Nanite geometry using rasterization."), ECVF_RenderThreadSafe)	(	TEXT("r.MegaLights.DefaultShadowMethod")	,
		GMegaLightsDefaultShadowMethod	,
		TEXT("1 - Virtual Shadow Maps. Has a significant per light cost, but can cast shadows directly from the Nanite geometry using rasterization.")	,
		ECVF_RenderThreadSafe
	)

CVarMegaLightsReset

FAutoConsoleVariableRef CVarMegaLightsReset(TEXT("r.MegaLights.Reset"), GMegaLightsReset, TEXT("Reset history for debugging."), ECVF_RenderThreadSafe)	(	TEXT("r.MegaLights.Reset")	,
		GMegaLightsReset	,
		TEXT("Reset history for debugging.")	,
		ECVF_RenderThreadSafe
	)

CVarMegaLightsResetEveryNthFrame

FAutoConsoleVariableRef CVarMegaLightsResetEveryNthFrame(TEXT("r.MegaLights.ResetEveryNthFrame"), GMegaLightsResetEveryNthFrame, TEXT("Reset history every Nth frame for debugging."), ECVF_RenderThreadSafe)	(	TEXT("r.MegaLights.ResetEveryNthFrame")	,
		GMegaLightsResetEveryNthFrame	,
		TEXT("Reset history every Nth frame for debugging.")	,
		ECVF_RenderThreadSafe
	)

GMegaLightsDefaultShadowMethod

int32 GMegaLightsDefaultShadowMethod = 0

GMegaLightsReset

int32 GMegaLightsReset = 0

GMegaLightsResetEveryNthFrame

int32 GMegaLightsResetEveryNthFrame = 0

GUseTranslucencyLightingVolumes

int32 GUseTranslucencyLightingVolumes

extern