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Documentation

Index

• Variables
• func CloneImage(img image.Image) *image.NRGBA
• func DecodeImage(r io.Reader) (image.Image, string, error)
• func Encode(w io.Writer, img image.Image, name string) error
• func EncodeImage(w io.Writer, img image.Image, format Format) error
• func NewImage(width, height int, fillColor color.Color) *image.NRGBA
• func OpenImage(filename string) (image.Image, string, error)
• func SaveImage(img image.Image, filename string) (err error)
• func UrlReader(url string) (image.Image, string, error)
• func UrlReaderToByte(url string) ([]byte, error)
• type Format
  • func (f Format) String() string

Variables

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

Functions

func CloneImage

func CloneImage(img image.Image) *image.NRGBA

CloneImage returns a copy of the given image.

func DecodeImage

func DecodeImage(r io.Reader) (image.Image, string, error)

Decode reads an image from r.

func Encode

func Encode(w io.Writer, img image.Image, name string) error

encode image file

func EncodeImage

func EncodeImage(w io.Writer, img image.Image, format Format) error

EncodeImage writes the image img to w in the specified format (JPEG, PNG, GIF, BMP).

func NewImage

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

NewImage creates a new image with the specified width and height, and fills it with the specified color.

func OpenImage

func OpenImage(filename string) (image.Image, string, error)

OpenImage loads an image from file

func SaveImage

func SaveImage(img image.Image, filename string) (err error)

SaveImage saves the image to file with the specified filename. The format is determined from the filename extension: "jpg" (or "jpeg"), "png", "gif", "bmp" are supported.

func UrlReader

func UrlReader(url string) (image.Image, string, error)

get url image

func UrlReaderToByte

func UrlReaderToByte(url string) ([]byte, error)

get url image byte

Types

type Format

type Format int

const (
	JPEG Format = iota
	PNG
	GIF
	BMP
)

func (Format) String

func (f Format) String() string