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This document uses PHP Chinese website manual Release
import "image/gif"
Overview
Index
包gif實(shí)現(xiàn)了一個(gè)GIF圖像解碼器和編碼器。
The GIF specification is at http://www.w3.org/Graphics/GIF/spec-gif89a.txt.
Constants
func Decode(r io.Reader) (image.Image, error)
func DecodeConfig(r io.Reader) (image.Config, error)
func Encode(w io.Writer, m image.Image, o *Options) error
func EncodeAll(w io.Writer, g *GIF) error
type GIF
func DecodeAll(r io.Reader) (*GIF, error)
type Options
reader.go writer.go
處置方法。
const ( DisposalNone = 0x01 DisposalBackground = 0x02 DisposalPrevious = 0x03)
func Decode(r io.Reader) (image.Image, error)
Decode從r中讀取GIF圖像并將第一個(gè)嵌入圖像作為圖像返回。圖像。
func DecodeConfig(r io.Reader) (image.Config, error)
DecodeConfig返回GIF圖像的全局顏色模型和尺寸,而不用解碼整個(gè)圖像。
func Encode(w io.Writer, m image.Image, o *Options) error
Encode將圖像m以GIF格式寫入w。
func EncodeAll(w io.Writer, g *GIF) error
EncodeAll將g中的圖像以GIF格式寫入w,給定的循環(huán)數(shù)和幀之間的延遲。
GIF表示可能存儲(chǔ)在GIF文件中的多個(gè)圖像。
type GIF struct { Image []*image.Paletted // The successive images. Delay []int // The successive delay times, one per frame, in 100ths of a second. LoopCount int // The loop count. // Disposal is the successive disposal methods, one per frame. For // backwards compatibility, a nil Disposal is valid to pass to EncodeAll, // and implies that each frame's disposal method is 0 (no disposal // specified). Disposal []byte // Config is the global color table (palette), width and height. A nil or // empty-color.Palette Config.ColorModel means that each frame has its own // color table and there is no global color table. Each frame's bounds must // be within the rectangle defined by the two points (0, 0) and // (Config.Width, Config.Height). // // For backwards compatibility, a zero-valued Config is valid to pass to // EncodeAll, and implies that the overall GIF's width and height equals // the first frame's bounds' Rectangle.Max point. Config image.Config // BackgroundIndex is the background index in the global color table, for // use with the DisposalBackground disposal method. BackgroundIndex byte}
func DecodeAll(r io.Reader) (*GIF, error)
DecodeAll從r讀取GIF圖像并返回連續(xù)的幀和時(shí)間信息。
Options是編碼參數(shù)。
type Options struct { // NumColors is the maximum number of colors used in the image. // It ranges from 1 to 256. NumColors int // Quantizer is used to produce a palette with size NumColors. // palette.Plan9 is used in place of a nil Quantizer. Quantizer draw.Quantizer // Drawer is used to convert the source image to the desired palette. // draw.FloydSteinberg is used in place of a nil Drawer. Drawer draw.Drawer}