imaging

package module

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Versions in this module

v1

v1.8.21

Apr 3, 2026

v1.8.20

Feb 23, 2026

v1.8.19

Jan 15, 2026

v1.8.18

Dec 24, 2025

v1.8.17

Nov 23, 2025

v1.8.16

Nov 23, 2025

v1.8.15

Nov 16, 2025

v1.8.14

Nov 15, 2025

v1.8.13

Nov 15, 2025

Changes in this version

+ func IsOpaqueType(img image.Image) (ans bool)

+ func ResizeWithOpacity(img image.Image, width, height int, filter ResampleFilter, is_opaque bool) image.Image

v1.8.12

Nov 15, 2025

Changes in this version

+ func AsRGBAData8(img image.Image) (pix []uint8)

v1.8.11

Nov 15, 2025

v1.8.10

Nov 15, 2025

v1.8.9

Nov 11, 2025

v1.8.8

Nov 10, 2025

Changes in this version

+ func AsRGBData8(img image.Image) (num_channels int, pix []uint8)

v1.8.7

Nov 10, 2025

Changes in this version

+ const FlipVTransform

v1.8.6

Nov 9, 2025

Changes in this version

+ const Absolute

+ const FlipHTransform

+ const FlipVTranform

+ const NoTransform

+ const Perceptual

+ const Relative

+ const Rotate180Transform

+ const Rotate270Transform

+ const Rotate90Transform

+ const Saturation

+ const TransposeTransform

+ const TransverseTransform

+ func NewDecodeConfig(opts ...DecodeOption) (cfg *decodeConfig)

+ func PasteOntoBackground(img image.Image, bg color.Color) image.Image

+ type Backend int

+ const GO_IMAGE

+ const MAGICK_IMAGE

+ func (b Backend) String() string

type DecodeOption

+ func Backends(backends ...Backend) DecodeOption

+ func Background(bg color.Color) DecodeOption

+ func BlackpointCompensation(enable bool) DecodeOption

+ func RenderingIntent(intent icc.RenderingIntent) DecodeOption

+ func ResizeCallback(f ResizeCallbackFunction) DecodeOption

+ func Transform(t types.TransformType) DecodeOption

type Image

+ func (ans *Image) SingleFrame() image.Image

+ func (img *Image) PasteOntoBackground(bg color.Color)

+ func (img *Image) Transform(t types.TransformType)

+ func (self *Image) SaveAsPNG(path string, mode fs.FileMode) error

type NRGB

+ func AsNRGB(src image.Image) *NRGB

+ type ResizeCallbackFunction func(w, h int) (nw, nh int)

v1.8.5

Nov 8, 2025

Changes in this version

+ func ClonePreservingOrigin(img image.Image) *image.NRGBA

type Frame

+ TopLeft image.Point

+ func (f *Frame) Dx() int

+ func (f *Frame) Dy() int

type Image

+ func (self *Image) Bounds() image.Rectangle

+ func (self *Image) FlipH()

+ func (self *Image) FlipV()

+ func (self *Image) Resize(width, height int, filter ResampleFilter)

+ func (self *Image) Rotate180()

+ func (self *Image) Rotate270()

+ func (self *Image) Rotate90()

+ func (self *Image) Transpose()

+ func (self *Image) Transverse()

v1.8.4

Nov 7, 2025

Changes in this version

type Frame

+ func (f *Frame) At(x, y int) color.Color

+ func (f *Frame) Bounds() image.Rectangle

+ func (f *Frame) ColorModel() color.Model

v1.8.3

Nov 7, 2025

Changes in this version

+ func NormalizeOrigin(src image.Image) image.Image

type Image

+ func (self *Image) Clone() *Image

+ func (self *Image) Coalesce()

+ func (self *Image) EncodeAsPNG(w io.Writer) error

v1.8.2

Nov 6, 2025

Changes in this version

+ const UNKNOWN

+ const WEBP

+ func AsNRGBA(src image.Image) *image.NRGBA

+ func ClonePreservingType(src image.Image) image.Image

+ func ConvertToSRGB(p *icc.Profile, image_any image.Image) (ans image.Image, err error)

+ func IsOpaque(img image.Image) (ans bool)

+ type ColorSpaceType int

+ const NO_CHANGE_OF_COLORSPACE

+ const SRGB_COLORSPACE

type DecodeOption

+ func ColorSpace(cs ColorSpaceType) DecodeOption

+ type Frame struct

+ ComposeOnto uint

+ Delay time.Duration

+ Image image.Image

+ Number uint

+ Replace bool

+ X int

+ Y int

+ type Image struct

+ DefaultImage image.Image

+ Frames []*Frame

+ LoopCount uint

+ Metadata *meta.Data

+ func DecodeAll(r io.Reader, opts ...DecodeOption) (ans *Image, s io.Reader, err error)

+ func OpenAll(filename string, opts ...DecodeOption) (*Image, error)

type Scanner

+ func ScannerForImage(img image.Image) Scanner

v1.7.2

Oct 15, 2025

v1.7.1

Oct 12, 2025

Changes in this version

+ type Scanner interface

+ Bounds func() image.Rectangle

+ Bytes_per_channel func() int

+ Num_of_channels func() int

+ Scan func(x1, y1, x2, y2 int, dst []uint8)

+ func NewNRGBAScanner(source_image image.Image) Scanner

+ func NewNRGBScanner(source_image image.Image, opaque_base NRGBColor) Scanner

v1.7.0

Oct 11, 2025

Changes in this version

+ var NRGBModel color.Model = color.ModelFunc(nrgbModel)

+ var Version = ImagingVersion

+ func DecodeNetPBM(r io.Reader) (img image.Image, err error)

+ func DecodeNetPBMConfig(r io.Reader) (cfg image.Config, err error)

+ func OpenConfig(filename string) (ans image.Config, format_name string, err error)

type Format

+ const PAM

+ const PBM

+ const PGM

+ const PPM

+ type ImagingVersion struct

+ Major uint

+ Minor uint

+ Patch uint

+ func (v ImagingVersion) After(o ImagingVersion) bool

+ func (v ImagingVersion) Before(o ImagingVersion) bool

+ func (v ImagingVersion) Equal(o ImagingVersion) bool

+ func (v ImagingVersion) String(o ImagingVersion) string

+ type NRGB struct

+ Pix []uint8

+ Rect image.Rectangle

+ Stride int

+ func NewNRGB(r image.Rectangle) *NRGB

+ func NewNRGBWithContiguousRGBPixels(p []byte, left, top, width, height int) (*NRGB, error)

+ func (p *NRGB) At(x, y int) color.Color

+ func (p *NRGB) Bounds() image.Rectangle

+ func (p *NRGB) ColorModel() color.Model

+ func (p *NRGB) NRGBAt(x, y int) NRGBColor

+ func (p *NRGB) Opaque() bool

+ func (p *NRGB) PixOffset(x, y int) int

+ func (p *NRGB) Set(x, y int, c color.Color)

+ func (p *NRGB) SetNRGBA(x, y int, c color.NRGBA)

+ func (p *NRGB) SetRGBA64(x, y int, c color.RGBA64)

+ func (p *NRGB) SubImage(r image.Rectangle) image.Image

+ type NRGBColor struct

+ B uint8

+ G uint8

+ R uint8

+ func (c NRGBColor) AsSharp() string

+ func (c NRGBColor) RGBA() (r, g, b, a uint32)

+ func (c NRGBColor) String() string

v1.6.5

Oct 9, 2025

v1.6.4

Feb 10, 2025

v1.6.3

Mar 22, 2024

Changes in this version

+ var ErrUnsupportedFormat = errors.New("imaging: unsupported image format")

+ func AdjustBrightness(img image.Image, percentage float64) *image.NRGBA

+ func AdjustContrast(img image.Image, percentage float64) *image.NRGBA

+ func AdjustFunc(img image.Image, fn func(c color.NRGBA) color.NRGBA) *image.NRGBA

+ func AdjustGamma(img image.Image, gamma float64) *image.NRGBA

+ func AdjustHue(img image.Image, shift float64) *image.NRGBA

+ func AdjustSaturation(img image.Image, percentage float64) *image.NRGBA

+ func AdjustSigmoid(img image.Image, midpoint, factor float64) *image.NRGBA

+ func Blur(img image.Image, sigma float64) *image.NRGBA

+ func Clone(img image.Image) *image.NRGBA

+ func Convolve3x3(img image.Image, kernel [9]float64, options *ConvolveOptions) *image.NRGBA

+ func Convolve5x5(img image.Image, kernel [25]float64, options *ConvolveOptions) *image.NRGBA

+ func Crop(img image.Image, rect image.Rectangle) *image.NRGBA

+ func CropAnchor(img image.Image, width, height int, anchor Anchor) *image.NRGBA

+ func CropCenter(img image.Image, width, height int) *image.NRGBA

+ func Decode(r io.Reader, opts ...DecodeOption) (image.Image, error)

+ func Encode(w io.Writer, img image.Image, format Format, opts ...EncodeOption) error

+ func Fill(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA

+ func Fit(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA

+ func FlipH(img image.Image) *image.NRGBA

+ func FlipV(img image.Image) *image.NRGBA

+ func Grayscale(img image.Image) *image.NRGBA

+ func Histogram(img image.Image) [256]float64

+ func Invert(img image.Image) *image.NRGBA

+ func New(width, height int, fillColor color.Color) *image.NRGBA

+ func Open(filename string, opts ...DecodeOption) (image.Image, error)

+ func Overlay(background, img image.Image, pos image.Point, opacity float64) *image.NRGBA

+ func OverlayCenter(background, img image.Image, opacity float64) *image.NRGBA

+ func Paste(background, img image.Image, pos image.Point) *image.NRGBA

+ func PasteCenter(background, img image.Image) *image.NRGBA

+ func Resize(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA

+ func Rotate(img image.Image, angle float64, bgColor color.Color) *image.NRGBA

+ func Rotate180(img image.Image) *image.NRGBA

+ func Rotate270(img image.Image) *image.NRGBA

+ func Rotate90(img image.Image) *image.NRGBA

+ func Save(img image.Image, filename string, opts ...EncodeOption) (err error)

+ func SetMaxProcs(value int)

+ func Sharpen(img image.Image, sigma float64) *image.NRGBA

+ func Thumbnail(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA

+ func Transpose(img image.Image) *image.NRGBA

+ func Transverse(img image.Image) *image.NRGBA

+ type Anchor int

+ const Bottom

+ const BottomLeft

+ const BottomRight

+ const Center

+ const Left

+ const Right

+ const Top

+ const TopLeft

+ const TopRight

+ type ConvolveOptions struct

+ Abs bool

+ Bias int

+ Normalize bool

+ type DecodeOption func(*decodeConfig)

+ func AutoOrientation(enabled bool) DecodeOption

+ type EncodeOption func(*encodeConfig)

+ func GIFDrawer(drawer draw.Drawer) EncodeOption

+ func GIFNumColors(numColors int) EncodeOption

+ func GIFQuantizer(quantizer draw.Quantizer) EncodeOption

+ func JPEGQuality(quality int) EncodeOption

+ func PNGCompressionLevel(level png.CompressionLevel) EncodeOption

+ type Format int

+ const BMP

+ const GIF

+ const JPEG

+ const PNG

+ const TIFF

+ func FormatFromExtension(ext string) (Format, error)

+ func FormatFromFilename(filename string) (Format, error)

+ func (f Format) String() string

+ type ResampleFilter struct

+ Kernel func(float64) float64

+ Support float64

+ var BSpline ResampleFilter

+ var Bartlett ResampleFilter

+ var Blackman ResampleFilter

+ var Box ResampleFilter

+ var CatmullRom ResampleFilter

+ var Cosine ResampleFilter

+ var Gaussian ResampleFilter

+ var Hamming ResampleFilter

+ var Hann ResampleFilter

+ var Hermite ResampleFilter

+ var Lanczos ResampleFilter

+ var Linear ResampleFilter

+ var MitchellNetravali ResampleFilter

+ var NearestNeighbor ResampleFilter

+ var Welch ResampleFilter

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