meta

package

v1.8.9 Latest Latest Go to latest Published: Nov 11, 2025 License: MIT Imports: 8 Imported by: 0

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Valid go.mod file
Redistributable license
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Repository

github.com/kovidgoyal/imaging

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Documentation ¶

Overview ¶

Package meta and its subpackages provide support for embedded image metadata.

Index ¶

Variables
type CodingIndependentCodePoints
type Data
type Primaries
- func (cs *Primaries) CalculateRGBtoXYZMatrix() icc.Matrix3
type TransferFunction
type WellKnownPrimaries
type XY

Constants ¶

This section is empty.

Variables ¶

View Source

var DISPLAY_P3 = CodingIndependentCodePoints{12, 13, 0, 1, true}

View Source

var SRGB = CodingIndependentCodePoints{1, 13, 0, 1, true}

Functions ¶

This section is empty.

Types ¶

type CodingIndependentCodePoints ¶ added in v1.8.2

type CodingIndependentCodePoints struct {
	ColorPrimaries, TransferCharacteristics, MatrixCoefficients, VideoFullRange uint8
	IsSet                                                                       bool
}

func (CodingIndependentCodePoints) IsSRGB ¶ added in v1.8.2

func (c CodingIndependentCodePoints) IsSRGB() bool

func (CodingIndependentCodePoints) PipelineTo ¶ added in v1.8.2

func (src CodingIndependentCodePoints) PipelineTo(dest CodingIndependentCodePoints) *icc.Pipeline

func (CodingIndependentCodePoints) PipelineToSRGB ¶ added in v1.8.2

func (c CodingIndependentCodePoints) PipelineToSRGB() *icc.Pipeline

func (CodingIndependentCodePoints) String ¶ added in v1.8.2

func (c CodingIndependentCodePoints) String() string

func (CodingIndependentCodePoints) VideoFullRangeIsValid ¶ added in v1.8.2

func (c CodingIndependentCodePoints) VideoFullRangeIsValid() bool

type Data ¶

type Data struct {
	Format              types.Format
	PixelWidth          uint32
	PixelHeight         uint32
	BitsPerComponent    uint32
	HasFrames           bool
	NumFrames, NumPlays int
	CICP                CodingIndependentCodePoints
	// contains filtered or unexported fields
}

Data represents the metadata for an image.

func (*Data) Clone ¶ added in v1.8.4

func (s *Data) Clone() *Data

func (*Data) Exif ¶ added in v1.8.2

func (md *Data) Exif() (*exif.Exif, error)

Returns an extracted EXIF metadata object from this metadata.

An error is returned if the EXIF profile could not be correctly parsed.

If no EXIF data was found, nil is returned without an error.

func (*Data) ExifData ¶

func (md *Data) ExifData() []byte

func (*Data) ICCProfile ¶

func (md *Data) ICCProfile() (*icc.Profile, error)

ICCProfile returns an extracted ICC profile from this metadata.

An error is returned if the ICC profile could not be correctly parsed.

If no profile data was found, nil is returned without an error.

func (*Data) ICCProfileData ¶

func (md *Data) ICCProfileData() ([]byte, error)

ICCProfileData returns the raw ICC profile data from this metadata.

An error is returned if the ICC profile could not be correctly extracted from the image.

If no profile data was found, nil is returned without an error.

func (*Data) IsSRGB ¶ added in v1.8.6

func (s *Data) IsSRGB() bool

func (*Data) SetExif ¶ added in v1.8.2

func (md *Data) SetExif(e *exif.Exif)

func (*Data) SetExifData ¶ added in v1.8.2

func (md *Data) SetExifData(data []byte)

func (*Data) SetExifError ¶ added in v1.8.2

func (md *Data) SetExifError(e error)

func (*Data) SetICCProfileData ¶

func (md *Data) SetICCProfileData(data []byte)

func (*Data) SetICCProfileError ¶

func (md *Data) SetICCProfileError(err error)

type Primaries ¶ added in v1.8.2

type Primaries struct {
	Name  string
	Red   XY
	Green XY
	Blue  XY
	White XY
}

ColorSpace defines the primaries and white point of a color space.

func (*Primaries) CalculateRGBtoXYZMatrix ¶ added in v1.8.2

func (cs *Primaries) CalculateRGBtoXYZMatrix() icc.Matrix3

CalculateRGBtoXYZMatrix computes the matrix to convert from a linear RGB color space to CIE XYZ.

type TransferFunction ¶ added in v1.8.2

type TransferFunction struct {
	ID   int
	Name string
	OETF func(float64) float64 // To non-linear
	EOTF func(float64) float64 // To linear
}

TransferFunction defines an Opto-Electronic Transfer Function (OETF) and its inverse Electro-Optical Transfer Function (EOTF).

type WellKnownPrimaries ¶ added in v1.8.2

type WellKnownPrimaries int

type XY ¶ added in v1.8.2

type XY struct {
	X, Y float64
}

XY holds CIE xy chromaticity coordinates.

Source Files ¶

View all Source files

Directories ¶

Path	Synopsis
autometa Package autometa provides support for embedded metadata and automatic detection of image formats.	Package autometa provides support for embedded metadata and automatic detection of image formats.
gifmeta
icc Package icc provides support for working with ICC colour profile data.	Package icc provides support for working with ICC colour profile data.
jpegmeta Package jpegmeta provides support for working with embedded JPEG metadata.	Package jpegmeta provides support for working with embedded JPEG metadata.
netpbmmeta
pngmeta Package pngmeta provides support for working with embedded PNG metadata.	Package pngmeta provides support for working with embedded PNG metadata.
tiffmeta
webpmeta Package webpmeta provides support for working with embedded WebP metadata.	Package webpmeta provides support for working with embedded WebP metadata.

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