gulp-node-spritesheet

Gulp plugin for node-spritesheet utility

Requirements

node-spritesheet utility requires ImageMagick, available via HomeBrew ($ sudo brew install ImageMagick) or MacPorts: ($ sudo port install ImageMagick).

Installation

Install the module with: npm install gulp-node-spritesheet

Usage

var sprite = require('gulp-node-spritesheet');

gulp.task('sprite', function() {
    gulp.src('icons/*.png')
    	.pipe(sprite({
            // Path for compiled sprite styles
			outputCss: 'sprite/style.css',

            // Uses this compound selector in the css, e.g. '.sprite.my-image {}'
			selector: '.sprite',

            // Name for sprite image file
			outputImage: 'image.png'
		}))
		.pipe(gulp.dest('sprite'));
});

Takes in a series of images a generates a sprite styles in sprite/style.css and passes sprite image image.png output.

Retina example

var sprite = require('gulp-node-spritesheet');

gulp.src('images/icons/*.png')
	.pipe(sprite({
		outputCss: './css/sprite.css',
		selector: '.sprite',

        // Optional ImageMagick sampling filter.
        downsampling: "LanczosSharp",

        // Output configurations: in this instance to output two sprite sheets,
        // one for "legacy" (i.e. 72dpi, pixel ratio 1), and "retina" (x2).
        // These keys (legacy, retina) are completely arbitrary.
		output: {
			legacy: {
				pixelRatio: 1,
				outputImage: 'sprite.png',
                // Optional path to output image
				httpImagePath: '../images/sprite.png'
			},
			retina: {
				pixelRatio: 2,
				outputImage: '[e-mail]',
				httpImagePath: '../images/[e-mail]'
			}
		}
        
        // Allows you to augment your selector names for each image, based on
        // the bare image "name", or the full image path.
        resolveImageSelector: function(name, fullpath) {
            // For example, your files may well already be named with @2x, but
            // you won't want that included in your CSS selectors.
            return name.split('@2x').join('');
        }
	}))
	.pipe(gulp.dest('images'));

As the retina scheme has the highest pixel ratio, it will be assumed that all images passed to the plugin are for 'retina'. So, at the output, will be two images [e-mail] for 'retina' and downscaled sprite.png for 'legacy'.

Release History

• 2015-09-07   v0.1.1   Minor fixes.
• 2014-11-14   v0.1.0   First release.

License

Copyright (c) 2014 Gaer Nikita. Licensed under the MIT license.