npm install gif.jsJavaScript GIF encoder that runs in your browser.
Uses typed arrays and web workers to render each frame in the background, it's really fast!
Demo - http://jnordberg.github.io/gif.js/
Works in browsers supporting: Web Workers, File API and Typed Arrays
Include gif.js found in dist/ in your page. Also make sure to have gif.worker.js in the same location.
``javascript
var gif = new GIF({
workers: 2,
quality: 10
});
// add an image element
gif.addFrame(imageElement);
// or a canvas element
gif.addFrame(canvasElement, {delay: 200});
// or copy the pixels from a canvas context
gif.addFrame(ctx, {copy: true});
gif.on('finished', function(blob) {
window.open(URL.createObjectURL(blob));
});
gif.render();
`
Options can be passed to the constructor or using the setOptions method.
| Name | Default | Description |
| -------------|-----------------|----------------------------------------------------|
| repeat | 0 | repeat count, -1 = no repeat, 0 = forever |10
| quality | | pixel sample interval, lower is better |2
| workers | | number of web workers to spawn |gif.worker.js
| workerScript | | url to load worker script from |#fff
| background | | background color where source image is transparent |null
| width | | output image width |null
| height | | output image height |null
| transparent | | transparent hex color, 0x00FF00 = green |false
| dither | | dithering method, e.g. FloydSteinberg-serpentine |false
| debug | | whether to print debug information to console |
If width or height is null image size will be deteremined by first frame added.
Available dithering methods are:
* FloydSteinberg
*
*
*
You can add -serpentine to use serpentine scanning, e.g. Stucki-serpentine.
| Name | Default | Description |
| -------------|-----------------|----------------------------------------------------|
| delay | 500 | frame delay |false` | copy the pixel data |
| copy |
gif.js is based on:
* Kevin Weiner's Animated gif encoder classes
* Neural-Net color quantization algorithm by Anthony Dekker
* Thibault Imbert's as3gif
Dithering code contributed by @PAEz and @panrafal
The MIT License (MIT)
Copyright (c) 2013 Johan Nordberg
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
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