UE::Color::ACES Namespace Reference

Classes
class	FGamutCuspTable
class	FReachMTable
class	FTextureLookupBase
class	FUpperHullGammaTable
struct	JMhParams
struct	Table1D
struct	Table3D
struct	ToneScaleParams

Functions
float	PanlrcForward (float Value, float F_L)
float	PanlrcInverse (float Value, float F_L)
bool	AnyBelowZero (const FVector3f &RGB)
bool	OutsideHull (const FVector3f &RGB)
float	Y_to_J (float Y, const JMhParams &Params)
float	WrapTo360 (float Hue)
int32	HuePositionInUniformTable (float Hue, int32 TableSize)
int32	ClampToTableBounds (int32 Entry, int32 TableSize)
float	Smin (float a, float b, float s)
FVector3f	JMh_to_RGB (const FVector3f &JMh, const JMhParams &Params)
JMhParams	InitJMhParams (const FColorSpace &InColorSpace)
ToneScaleParams	InitToneScaleParams (float PeakLuminance)
Table1D	MakeReachMTable (float PeakLuminance)
FVector3f	HSV_to_RGB (const FVector3f &HSV)
FVector3f	RGB_to_JMh (const FVector3f &RGB, const JMhParams &Params)
Table3D	MakeGamutTable (const FColorSpace &InLimitingColorSpace, float PeakLuminance)
FVector2f	CuspToTable (float h, const Table3D &Gt)
float	GetFocusGain (float J, float CuspJ, float LimitJMax)
float	SolveJIntersect (float J, float M, float FocusJ, float MaxJ, float SlopeGain)
FVector3f	FindGamutBoundaryIntersection (const FVector3f &JMh_s, const FVector2f &JM_cusp_in, float J_focus, float J_max, float SlopeGain, float gamma_top, float gamma_bottom)
bool	EvaluateGammaFit (const FVector2f &JMcusp, const FVector3f TestJMh[3], float TopGamma, float PeakLuminance, float LimitJMax, float Mid_J, float FocusDist, float LowerHullGamma, const JMhParams &LimitJMhParams)
Table1D	MakeUpperHullGamma (const Table3D &GamutCuspTable, float PeakLuminance, float LimitJMax, float Mid_J, float FocusDist, float LowerHullGamma, const JMhParams &LimitJMhParams)
void	GetTransformResources (FRDGBuilder &GraphBuilder, float InPeakLuminance, FRHIShaderResourceView *&OutReachMTable, FRHIShaderResourceView *&OutGamutCuspTable, FRHIShaderResourceView *&OutUpperHullGammaTable)

Variables
constexpr int32	TABLE_SIZE = 360
constexpr int32	TABLE_ADDITION_ENTRIES = 2
constexpr int32	TABLE_TotalSize = TABLE_SIZE + TABLE_ADDITION_ENTRIES
constexpr int32	GAMUT_TABLE_BASE_INDEX = 1
constexpr float	ReferenceLuminance = 100.f
constexpr float	L_A = 100.f
constexpr float	Y_b = 20.f
constexpr float	AcResp = 1.f
constexpr float	Ra = 2.f * AcResp
constexpr float	Ba = 0.05f + (2.f - Ra)
constexpr float	Surround [3] = { 0.9f, 0.59f, 0.9f }
constexpr float	SmoothCusps = 0.12f
constexpr float	SmoothM = 0.27f
constexpr float	CuspMidBlend = 1.3f
constexpr float	FocusGainBlend = 0.3f
constexpr float	FocusAdjustGain = 0.55f
constexpr float	FocusDistance = 1.35f
constexpr float	FocusDistanceScaling = 1.75f
constexpr float	CompressionThreshold = 0.75f
constexpr float	GammaMinimum = 0.0f
constexpr float	GammaMaximum = 5.0f
constexpr float	GammaSearchStep = 0.4f
constexpr float	GammaAccuracy = 1e-5f

Function Documentation

AnyBelowZero()

bool UE::Color::ACES::AnyBelowZero ( const FVector3f &  RGB )

inline

ClampToTableBounds()

int32 UE::Color::ACES::ClampToTableBounds	(	int32	Entry,
		int32	TableSize
	)

CuspToTable()

FVector2f UE::Color::ACES::CuspToTable	(	float	h,
		const Table3D &	Gt
	)

EvaluateGammaFit()

bool UE::Color::ACES::EvaluateGammaFit	(	const FVector2f &	JMcusp,
		const FVector3f	TestJMh[3],
		float	TopGamma,
		float	PeakLuminance,
		float	LimitJMax,
		float	Mid_J,
		float	FocusDist,
		float	LowerHullGamma,
		const JMhParams &	LimitJMhParams
	)

FindGamutBoundaryIntersection()

FVector3f UE::Color::ACES::FindGamutBoundaryIntersection	(	const FVector3f &	JMh_s,
		const FVector2f &	JM_cusp_in,
		float	J_focus,
		float	J_max,
		float	SlopeGain,
		float	gamma_top,
		float	gamma_bottom
	)

GetFocusGain()

float UE::Color::ACES::GetFocusGain	(	float	J,
		float	CuspJ,
		float	LimitJMax
	)

GetTransformResources()

void UE::Color::ACES::GetTransformResources	(	FRDGBuilder &	GraphBuilder,
		float	InPeakLuminance,
		FRHIShaderResourceView *&	OutReachMTable,
		FRHIShaderResourceView *&	OutGamutCuspTable,
		FRHIShaderResourceView *&	OutUpperHullGammaTable
	)

HSV_to_RGB()

FVector3f UE::Color::ACES::HSV_to_RGB

(

const FVector3f &

HSV

)

HuePositionInUniformTable()

int32 UE::Color::ACES::HuePositionInUniformTable	(	float	Hue,
		int32	TableSize
	)

InitJMhParams()

JMhParams UE::Color::ACES::InitJMhParams

(

const FColorSpace &

InColorSpace

)

InitToneScaleParams()

ToneScaleParams UE::Color::ACES::InitToneScaleParams

(

float

PeakLuminance

)

JMh_to_RGB()

FVector3f UE::Color::ACES::JMh_to_RGB	(	const FVector3f &	JMh,
		const JMhParams &	Params
	)

MakeGamutTable()

Table3D UE::Color::ACES::MakeGamutTable	(	const FColorSpace &	InLimitingColorSpace,
		float	PeakLuminance
	)

MakeReachMTable()

Table1D UE::Color::ACES::MakeReachMTable

(

float

PeakLuminance

)

MakeUpperHullGamma()

Table1D UE::Color::ACES::MakeUpperHullGamma	(	const Table3D &	GamutCuspTable,
		float	PeakLuminance,
		float	LimitJMax,
		float	Mid_J,
		float	FocusDist,
		float	LowerHullGamma,
		const JMhParams &	LimitJMhParams
	)

OutsideHull()

bool UE::Color::ACES::OutsideHull

(

const FVector3f &

RGB

)

PanlrcForward()

float UE::Color::ACES::PanlrcForward	(	float	Value,
		float	F_L
	)

PanlrcInverse()

float UE::Color::ACES::PanlrcInverse	(	float	Value,
		float	F_L
	)

RGB_to_JMh()

FVector3f UE::Color::ACES::RGB_to_JMh	(	const FVector3f &	RGB,
		const JMhParams &	Params
	)

Smin()

float UE::Color::ACES::Smin	(	float	a,
		float	b,
		float	s
	)

SolveJIntersect()

float UE::Color::ACES::SolveJIntersect	(	float	J,
		float	M,
		float	FocusJ,
		float	MaxJ,
		float	SlopeGain
	)

WrapTo360()

float UE::Color::ACES::WrapTo360

(

float

Hue

)

Y_to_J()

float UE::Color::ACES::Y_to_J	(	float	Y,
		const JMhParams &	Params
	)

Variable Documentation

AcResp

constexpr float UE::Color::ACES::AcResp = 1.f

constexpr

Ba

constexpr float UE::Color::ACES::Ba = 0.05f + (2.f - Ra)

constexpr

CompressionThreshold

constexpr float UE::Color::ACES::CompressionThreshold = 0.75f

constexpr

CuspMidBlend

constexpr float UE::Color::ACES::CuspMidBlend = 1.3f

constexpr

FocusAdjustGain

constexpr float UE::Color::ACES::FocusAdjustGain = 0.55f

constexpr

FocusDistance

constexpr float UE::Color::ACES::FocusDistance = 1.35f

constexpr

FocusDistanceScaling

constexpr float UE::Color::ACES::FocusDistanceScaling = 1.75f

constexpr

FocusGainBlend

constexpr float UE::Color::ACES::FocusGainBlend = 0.3f

constexpr

GammaAccuracy

constexpr float UE::Color::ACES::GammaAccuracy = 1e-5f

constexpr

GammaMaximum

constexpr float UE::Color::ACES::GammaMaximum = 5.0f

constexpr

GammaMinimum

constexpr float UE::Color::ACES::GammaMinimum = 0.0f

constexpr

GammaSearchStep

constexpr float UE::Color::ACES::GammaSearchStep = 0.4f

constexpr

GAMUT_TABLE_BASE_INDEX

constexpr int32 UE::Color::ACES::GAMUT_TABLE_BASE_INDEX = 1

constexpr

L_A

constexpr float UE::Color::ACES::L_A = 100.f

constexpr

Ra

constexpr float UE::Color::ACES::Ra = 2.f * AcResp

constexpr

ReferenceLuminance

constexpr float UE::Color::ACES::ReferenceLuminance = 100.f

constexpr

SmoothCusps

constexpr float UE::Color::ACES::SmoothCusps = 0.12f

constexpr

SmoothM

constexpr float UE::Color::ACES::SmoothM = 0.27f

constexpr

Surround

constexpr float UE::Color::ACES::Surround[3] = { 0.9f, 0.59f, 0.9f }

constexpr

TABLE_ADDITION_ENTRIES

constexpr int32 UE::Color::ACES::TABLE_ADDITION_ENTRIES = 2

constexpr

TABLE_SIZE

constexpr int32 UE::Color::ACES::TABLE_SIZE = 360

constexpr

Source code adapted from OpenColorIO/src/OpenColorIO/ops/fixedfunction/ACES2 (v2.4.1)

Copyright Contributors to the OpenColorIO Project.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

TABLE_TotalSize

constexpr int32 UE::Color::ACES::TABLE_TotalSize = TABLE_SIZE + TABLE_ADDITION_ENTRIES

constexpr

Y_b

constexpr float UE::Color::ACES::Y_b = 20.f

constexpr