color

package
v0.0.0-...-2eec009 Latest Latest
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 Go to latest Published: Feb 13, 2025 License: MIT Imports: 4 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	PRI_SRGB   int32 = 1
	PRI_CUSTOM int32 = 2
	PRI_BT2100 int32 = 9
	PRI_P3     int32 = 11

	WP_D50    int32 = -1
	WP_D65    int32 = 1
	WP_CUSTOM int32 = 2
	WP_E      int32 = 10
	WP_DCI    int32 = 11

	CE_RGB     int32 = 0
	CE_GRAY    int32 = 1
	CE_XYB     int32 = 2
	CE_UNKNOWN int32 = 3

	RI_PERCEPTUAL int32 = 0
	RI_RELATIVE   int32 = 1
	RI_SATURATION int32 = 2
	RI_ABSOLUTE   int32 = 3

	TF_BT709   int32 = 1 + (1 << 24)
	TF_UNKNOWN int32 = 2 + (1 << 24)
	TF_LINEAR  int32 = 8 + (1 << 24)
	TF_SRGB    int32 = 13 + (1 << 24)
	TF_PQ      int32 = 16 + (1 << 24)
	TF_DCI     int32 = 17 + (1 << 24)
	TF_HLG     int32 = 18 + (1 << 24)
)

Variables

View Source 
var (
	CM_PRI_SRGB   = GetPrimaries(PRI_SRGB)
	CM_PRI_BT2100 = GetPrimaries(PRI_BT2100)
	CM_PRI_P3     = GetPrimaries(PRI_P3)

	CM_WP_D65 = GetWhitePoint(WP_D65)
	CM_WP_D50 = GetWhitePoint(WP_D50)

	BRADFORD = [][]float32{
		{0.8951, 0.2664, -0.1614},
		{-0.7502, 1.7135, 0.0367},
		{0.0389, -0.0685, 1.0296},
	}

	BRADFORD_INVERSE = util.InvertMatrix3x3(BRADFORD)
)
View Source 
var (
	DEFAULT_MATRIX = [][]float32{
		{11.031566901960783, -9.866943921568629, -0.16462299647058826},
		{-3.254147380392157, 4.418770392156863, -0.16462299647058826},
		{-3.6588512862745097, 2.7129230470588235, 1.9459282392156863}}
	DEFAULT_OPSIN_BIAS              = []float32{-0.0037930732552754493, -0.0037930732552754493, -0.0037930732552754493}
	DEFAULT_QUANT_BIAS              = []float32{1.0 - 0.05465007330715401, 1.0 - 0.07005449891748593, 1.0 - 0.049935103337343655}
	DEFAULT_QBIAS_NUMERATOR float32 = 0.145
)

Functions

func AdaptWhitePoint 

func AdaptWhitePoint(targetWP *CIEXY, currentWP *CIEXY) ([][]float32, error)

func GetConversionMatrix 

func GetConversionMatrix(targetPrim CIEPrimaries, targetWP CIEXY, currentPrim CIEPrimaries, currentWP CIEXY) ([][]float32, error)

func GetXYZ 

func GetXYZ(xy CIEXY) ([]float32, error)

func ValidateColorEncoding 

func ValidateColorEncoding(colorEncoding int32) bool

func ValidatePrimaries 

func ValidatePrimaries(primaries int32) bool

func ValidateRenderingIntent 

func ValidateRenderingIntent(renderingIntent int32) bool

func ValidateTransfer 

func ValidateTransfer(transfer int32) bool

func ValidateWhitePoint 

func ValidateWhitePoint(whitePoint int32) bool

Types

type BT709TransferFunction 

type BT709TransferFunction struct {
}

func (BT709TransferFunction) FromLinear 

func (tf BT709TransferFunction) FromLinear(input float64) float64

func (BT709TransferFunction) ToLinear 

func (tf BT709TransferFunction) ToLinear(input float64) float64

type CIEPrimaries 

type CIEPrimaries struct {
	Red   *CIEXY
	Green *CIEXY
	Blue  *CIEXY
}

func GetPrimaries 

func GetPrimaries(primaries int32) *CIEPrimaries

func NewCIEPrimaries 

func NewCIEPrimaries(red *CIEXY, green *CIEXY, blue *CIEXY) *CIEPrimaries

func (*CIEPrimaries) Matches 

func (cp *CIEPrimaries) Matches(b *CIEPrimaries) bool

type CIEXY 

type CIEXY struct {
	X float32
	Y float32
}

func GetWhitePoint 

func GetWhitePoint(whitePoint int32) *CIEXY

func NewCIEXY 

func NewCIEXY(x float32, y float32) *CIEXY

func (*CIEXY) Matches 

func (cxy *CIEXY) Matches(b *CIEXY) bool

type ColorEncodingBundle 

type ColorEncodingBundle struct {
	UseIccProfile   bool
	ColorEncoding   int32
	WhitePoint      int32
	White           *CIEXY
	Primaries       int32
	Prim            *CIEPrimaries
	Tf              int32
	RenderingIntent int32
}

func NewColorEncodingBundle 

func NewColorEncodingBundle() (*ColorEncodingBundle, error)

func NewColorEncodingBundleWithReader 

func NewColorEncodingBundleWithReader(reader *jxlio.Bitreader) (*ColorEncodingBundle, error)

type CustomXY 

type CustomXY struct {
	CIEXY
}

func NewCustomXY 

func NewCustomXY(reader *jxlio.Bitreader) (*CustomXY, error)

type GammaTransferFunction 

type GammaTransferFunction struct {
	// contains filtered or unexported fields
}

func NewGammaTransferFunction 

func NewGammaTransferFunction(transfer int32) GammaTransferFunction

func (GammaTransferFunction) FromLinear 

func (tf GammaTransferFunction) FromLinear(input float64) float64

func (GammaTransferFunction) ToLinear 

func (tf GammaTransferFunction) ToLinear(input float64) float64

type LinearTransferFunction 

type LinearTransferFunction struct {
}

func (LinearTransferFunction) FromLinear 

func (tf LinearTransferFunction) FromLinear(input float64) float64

func (LinearTransferFunction) ToLinear 

func (tf LinearTransferFunction) ToLinear(input float64) float64

type OpsinInverseMatrix 

type OpsinInverseMatrix struct {
	QuantBias          []float32
	QuantBiasNumerator float32
	// contains filtered or unexported fields
}

func NewOpsinInverseMatrix 

func NewOpsinInverseMatrix() *OpsinInverseMatrix

func NewOpsinInverseMatrixAllParams 

func NewOpsinInverseMatrixAllParams(
	primaries CIEPrimaries,
	whitePoint CIEXY,
	matrix [][]float32,
	opsinBias []float32,
	quantBias []float32,
	quantBiasNumerator float32) *OpsinInverseMatrix

func NewOpsinInverseMatrixWithReader 

func NewOpsinInverseMatrixWithReader(reader *jxlio.Bitreader) (*OpsinInverseMatrix, error)

func (*OpsinInverseMatrix) GetMatrix 

func (oim *OpsinInverseMatrix) GetMatrix(prim *CIEPrimaries, white *CIEXY) (*OpsinInverseMatrix, error)

func (*OpsinInverseMatrix) InvertXYB 

func (oim *OpsinInverseMatrix) InvertXYB(buffer [][][]float32, intensityTarget float32) error

type PQTransferFunction 

type PQTransferFunction struct {
}

func (PQTransferFunction) FromLinear 

func (tf PQTransferFunction) FromLinear(input float64) float64

func (PQTransferFunction) ToLinear 

func (tf PQTransferFunction) ToLinear(input float64) float64

type SRGBTransferFunction 

type SRGBTransferFunction struct {
}

func (SRGBTransferFunction) FromLinear 

func (tf SRGBTransferFunction) FromLinear(input float64) float64

func (SRGBTransferFunction) ToLinear 

func (tf SRGBTransferFunction) ToLinear(input float64) float64

type ToneMapping 

type ToneMapping struct {
	IntensityTarget      float32
	MinNits              float32
	RelativeToMaxDisplay bool
	LinearBelow          float32
}

func NewToneMapping 

func NewToneMapping() *ToneMapping

func NewToneMappingWithReader 

func NewToneMappingWithReader(reader *jxlio.Bitreader) (*ToneMapping, error)

func (*ToneMapping) GetIntensityTarget 

func (tm *ToneMapping) GetIntensityTarget() float32

type TransferFunction 

type TransferFunction interface {
	ToLinear(input float64) float64
	FromLinear(input float64) float64
}

func GetTransferFunction 

func GetTransferFunction(transfer int32) (TransferFunction, error)

Source Files

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