grunt-spriter

Analyzes your existing CSS files and either generates highly optimized sprite sheets using a growing binary tree bin-packing algorithm or inlines them using data URIs and outputs an updated CSS stylesheet.

It even groups your retina and non-retina images into separate sprite sheets to reduce load times.

Based on spriter.

Getting Started

This plugin requires Grunt ~0.4.0.

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

To install Cairo library, check out the node-canvas wiki.

npm install grunt-spriter --save-dev

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

grunt.loadNpmTasks('grunt-spriter');

The "spriter" task

Overview

In your project's Gruntfile, add a section named spriter to the data object passed into grunt.initConfig().

grunt.initConfig({
  spriter: {
    options: {
      // Task-specific options go here.
    },
    your_target: {
      // Target-specific file lists and/or options go here.
    },
  },
})

Options

options.targetPath

Type: String Default value: images/generated/

Sprite's output path relative to destination or options.source path (required unless generating inline).

options.source

Type: String Default value: no

Source path relative to input.

options.filter

Type: String or Array Default value: no

Source url(s) filter (e.g: images/sprites).

options.inline

Type: Boolean Default value: false

Just inline images as data URIs.

options.optimize

Type: Boolean Default value: true

Disable rule optimization.

options.spriteName

Type: String Default value: sprite

Name of the output sprite sheet file (used if filter isn't specified).

Usage Examples

Outputs two sprites (i/icons.png and i/buttons.png):

grunt.initConfig({
  spriter: {
    dist: {
      options: {
        targetPath: 'i/',
        filter: ['../i/icons/', '../i/buttons/']
      },
      src: 'css/main.css',
      dest: 'css/main.css'
    }
  }
})

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

License

Copyright (c) 2013 Dmitry Nikitenko. Licensed under the MIT license.