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

==============

Fork objective

This version rectifies the problem with its use in PIXI.js where packing assets together and sub-pixel rendering creates artefacts around the assets, especially in tiled textures.

Avoiding this issue with the following:

• create 2px (or otherwise specified) gap between each image
• recalculate the coordinate with the extra 2px at top, bottom, left, right

============== ###Supported spritesheet formats###

• Starling / Sparrow
• JSON (i.e. PIXI.js)
• Easel.js
• cocos2d (experimental)

###Usage###

1. 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: "."]
     --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]
     --algorithm   packing algorithm: growing-binpacking (default), binpacking (requires passing width and height options), vertical or horizontal  [default: "growing-binpacking"]
     --gap2px      add 2 px gap around each texture and readjust the coordinates, so each texture are not touching eachother.                       [default: false]
   

2. 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 or PIXI.js dont't support this feature.*
![Trimming / Cropping](http://i.imgur.com/76OokJU.png)

###Installation###
1. Install [ImageMagick](http://www.imagemagick.org/)
2. ```npm install spritesheet-js -g```

###Test###

mocha test

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Thanks [Przemysław Piekarski](http://www.behance.net/piekarski) for logo design and assets in examples.