Spritesheet.js is command-line spritesheet (a.k.a. Texture Atlas) generator written in node.js.

Supported spritesheet formats

• Starling / Sparrow
• JSON (i.e. PIXI.js)
• Easel.js
• cocos2d (i.e. version 2.x)
• cocos2d-v3 (i.e. version 3.x)
• CSS (new!)

Usage

Command Line

$ spritesheet-js assets/*.png

Options:

$ spritesheet-js
Usage: spritesheet-js [options] <files>

Options:
-f, --format  format of spritesheet (starling, sparrow, json, pixi.js, easel.js, cocos2d)                                                          [default: "json"]
-n, --name    name of generated spritesheet                                                                                                        [default: "spritesheet"]
-p, --path    path to export directory                                                                                                             [default: "."]
--fullpath    include path in file name                                                                                                            [default: false]
--prefix      prefix for image paths (css format only)                                                                                             [default: ""]
--trim        removes transparent whitespaces around images                                                                                        [default: false]
--square      texture should be s square                                                                                                           [default: false]
--powerOfTwo  texture width and height should be power of two                                                                                      [default: false]
--validate    check algorithm returned data                                                                                                        [default: false]
--algorithm   packing algorithm: growing-binpacking (default), binpacking (requires passing --width and --height options), vertical or horizontal  [default: "growing-binpacking"]
--width       width for binpacking                                                                                                                 [default: undefined]
--height      height for binpacking                                                                                                                [default: undefined]
--padding     padding between images in spritesheet                                                                                                [default: 0]
--scale       percentage scale                                                                                                                     [default: "100%"]
--fuzz        percentage fuzz factor (usually value of 1% is a good choice)                                                                        [default: ""]

Node.js

var spritesheet = require('spritesheet-js');

spritesheet('assets/*.png', {format: 'json'}, function (err) {
if (err) throw err;

console.log('spritesheet successfully generated');
});

Trimming / Cropping

Spritesheet.js can remove transparent whitespace around images. Thanks to that you can pack more assets into one spritesheet and it makes rendering a little bit faster.

NOTE: Some libraries such as Easel.js dont't support this feature.

Installation

1. Install ImageMagick
2. npm install spritesheet-js -g

Test

mocha test

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Thanks Przemysław Piekarski for logo design and assets in examples.