From 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Sun, 7 Apr 2024 13:41:34 -0500 Subject: new repository --- devdocs/go/image%2Fgif%2Findex.html | 74 +++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 devdocs/go/image%2Fgif%2Findex.html (limited to 'devdocs/go/image%2Fgif%2Findex.html') diff --git a/devdocs/go/image%2Fgif%2Findex.html b/devdocs/go/image%2Fgif%2Findex.html new file mode 100644 index 00000000..e695fb18 --- /dev/null +++ b/devdocs/go/image%2Fgif%2Findex.html @@ -0,0 +1,74 @@ +

Package gif

import "image/gif"
Overview
Index

Overview

Package gif implements a GIF image decoder and encoder.

The GIF specification is at https://www.w3.org/Graphics/GIF/spec-gif89a.txt.

Index

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

Package files

reader.go writer.go

Constants

Disposal Methods.

const (
+    DisposalNone       = 0x01
+    DisposalBackground = 0x02
+    DisposalPrevious   = 0x03
+)

func Decode

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

Decode reads a GIF image from r and returns the first embedded image as an image.Image.

func DecodeConfig

func DecodeConfig(r io.Reader) (image.Config, error)

DecodeConfig returns the global color model and dimensions of a GIF image without decoding the entire image.

func Encode 1.2

func Encode(w io.Writer, m image.Image, o *Options) error

Encode writes the Image m to w in GIF format.

func EncodeAll 1.2

func EncodeAll(w io.Writer, g *GIF) error

EncodeAll writes the images in g to w in GIF format with the given loop count and delay between frames.

type GIF

GIF represents the possibly multiple images stored in a GIF file.

type GIF struct {
+    Image []*image.Paletted // The successive images.
+    Delay []int             // The successive delay times, one per frame, in 100ths of a second.
+    // LoopCount controls the number of times an animation will be
+    // restarted during display.
+    // A LoopCount of 0 means to loop forever.
+    // A LoopCount of -1 means to show each frame only once.
+    // Otherwise, the animation is looped LoopCount+1 times.
+    LoopCount int
+    // 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 // Go 1.5
+    // 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 // Go 1.5
+    // BackgroundIndex is the background index in the global color table, for
+    // use with the DisposalBackground disposal method.
+    BackgroundIndex byte // Go 1.5
+}
+

func DecodeAll

func DecodeAll(r io.Reader) (*GIF, error)

DecodeAll reads a GIF image from r and returns the sequential frames and timing information.

type Options 1.2

Options are the encoding parameters.

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
+}
+

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