Generate sprites from retina images

This "Basic" task generate images from large original (@2x) sources, optimize sprite via imgo and fix half-pixel bug (retina-images with odd width/height).

Inspired by grunt-tamia-sprite.

Installation

This plugin requires Grunt 0.4. Uses grunt-tamia-sprite, grunt-imgo (optional) tasks and GraphicsMagick for node.

Install GraphicsMagick

Download and install GraphicsMagick or ImageMagick. In Mac OS X, you can simply use Homebrew and do:

brew install imagemagick
brew install graphicsmagick

Then install grunt-spritify and deps tasks:

npm install -D grunt-tamia-sprite grunt-imgo grunt-spritify

Add to your Gruntfile.js:

grunt.loadNpmTasks('grunt-tamia-sprite');
grunt.loadNpmTasks('grunt-imgo');
grunt.loadNpmTasks('grunt-spritify');

Usage

Pass folder as argument for task:

grunt spritify:${PWD}

Use ${PWD} for generate sprite in current folder.

By default task try to find <folder>/origin/*.png original files for sprite.

Configuration

Then add section named spritify inside grunt.initConfig(). See next section for details.

options

Options inside options object.

options.src

Original files for sprite. Support globbing patterns. Default: origin/*.png

options.dest

Dest folder with generated for grunt-tamia-sprite images. Default: src

options.destSprite

Sprite name. Pass string or function (first argument — dir, passed in task arguments). Default: bem-liked name notation by path <folder-name>__7up.png, support mods: block_mod__7up.png for path block/_mod/.

options.gm

Object, passed in gm options. Pass the option {imageMagick: true} to use ImageMagick instead of gm

options.sprite

Object passed to grunt-tamia-sprite task. Default:

{
    destStyl: false
}

By default grunt-tamia-sprite generate .json file with sprite variables

options.imgo

Object passed to grunt-imgo task. Pass imgo: false if need disable imgo optimization.