sprite.styl

Stylus mixins for generating image sprites.

Getting started

Requirements

sprite.styl uses node-canvas to generate images. You have to install Cairo on your computer before getting started. See here for more information.

Installation

$ npm install sprite.styl

Usage

JavaScript

First, import sprite.styl to Stylus.

var stylus = require('stylus'),
    sprite = require('sprite.styl');
 
var style = stylus(str).use(sprite(options));

Option	Description	Default
base_dir	Base directory	process.cwd()
image_dir	Image directory	images
cache_dir	Cache directory	.stylus_cache
base_url	Base URL	/
image_url	Image URL	images
layout	Sprite layout (See algorithms)	vertical
spacing	Spacing between images in sprites	0

Stylus

icons = sprite-map("icons/*.png")
 
.cards-club
    sprite(icons, cards-club)

Retina Sprites

If normal and retina images are in the same folder:

icons = retina-sprite-map("icons/*.png")
// icons[0] = sprite-map("icons/!(*@2x).png")
// icons[1] = sprite-map("icons/*@2x.png")

If normal and retina images are separated:

icons = retina-sprite-map("icons/*.png", "icons-2x/*.png")
// icons[0] = sprite-map("icons/*.png")
// icons[1] = sprite-map("icons-2x/*.png")

Clean Cache

$ rm -rf .stylus_cache

Algorithms

• vertical: Allocates images vertically.

  

• vertical-right: Allocates images vertically aligning to the right of the sprite.

  

• horizontal: Allocates images horizontally.

  

• horizontal-bottom: Allocates images horizontally aligning to the bottom of the sprite.

  

• diagonal: Allocates images diagonally.

  

API

sprite-map(path, [layout=vertical], [spacing=0])

Generates a sprite map.

sprite-url(map)

Returns the URL of a sprite map.

sprite-position(map, name, [offset-x=0], [offset-y=0])

Returns the position of an image in a sprite.

sprite-file(map, name)

Returns a file object in a sprite. A file object contains

• path: Relative path of an image
• x: Horizontal position of an image in a sprite
• y: Vertical position of an image in a sprite
• width: Image width
• height: Image height

sprite-file-path(map, name)

Returns the original path of an image in a sprite.

image-width(path)

Returns the width of an image.

image-height(path)

Returns the height of an image.

image-url(path)

Returns the image URL.

retina-file-path(path, [modifier=@2x])

Returns the file path trailing with modifier. For example:

retina-file-path("icons/foo.png") => "icons/foo@2x.png"
retina-file-path("icons/bar.png", "-2x") => "icons/bar-2x.png"

retina-sprite-map(path, [path2x], [layout=vertical], [spacing=0])

Generates an array of sprite maps. The first map is for normal display and the second one is for retina display. If path2x is not defined, it will be path@2x.png.

sprite(map, name, [dimensions=false], [offset-x=0], [offset-y=0])

Generates background property for an element. For example:

.cards-club
    sprite(icons, cards-club)

yields:

.cards-club {
    background: url("/images/sprite.png") 0px -32px no-repeat;
}

sprite-background-position(map, name, [offset-x=0], [offset-y=0])

Generates background-position property for an element. For example:

.cards-club
    sprite-background-position(icons, cards-club)

yields:

.cards-club {
    background-position: 0px -32px;
}

sprite-dimensions(map, name)

Sets the width and the height to the original dimensions of an image. For example:

.cards-club
    sprite-dimensions(icons, cards-club)

yields:

.cards-club {
    width: 32px;
    height: 32px;
}

retina-background(bg, [bg2x])

Sets background property for retina images. If bg2x is not defined, it will be bg@2x.png. For example:

.foo
  retina-background("icons/foo.png")
 
.bar
  retina-background("icons/bar.png", "icons-2x/bar.png")

yields:

.foo {
  background-image: url("/images/icons/foo.png");
}
@media (-webkit-min-device-pixel-ratio: 1.5), (min-resolution: 144dpi) {
  .foo {
    background-image: url("/images/icons/foo@2x.png");
    background-size: 50% auto;
  }
}
.bar {
  background-image: url("/images/icons/bar.png");
}
@media (-webkit-min-device-pixel-ratio: 1.5), (min-resolution: 144dpi) {
  .bar {
    background-image: url("/images/icons-2x/bar.png");
    background-size: 50% auto;
  }
}

License

(The MIT License)

Copyright (c) 2014 Tommy Chen

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 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 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.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.