spritezero

Overview

Small opinionated sprites.

Why is this different than sprite generation libraries like spritesmith? spritezero was initially created to power a sprite API, and thus is geared towards performance, as well as an ability to work with image data in buffers rather than on disk. Also, since version 2.0, spritezero generates sprites based on SVG graphics alone, therefore making it possible to support @2x and higher-dpi sprites from the same source.

Fork Information

This project was forked from @mapbox/spritezero.

Reasons for Forking

1. Compatibility Issues with New Node Versions: The original package relies on mapnik, which does not work with the latest versions of Node.js. This dependency created compatibility issues that hindered development and use on modern systems.
2. Lack of Updates: The original package was not being actively maintained or updated. This stagnation meant missing out on performance improvements and bug fixes.
3. Switching to Sharp: By switching to sharp, a more modern and efficient image processing library, we've been able to render more complex and efficient sprites. sharp provides better performance, leading to faster sprite generation and reduced resource usage.

Usage

var spritezero = require('@jutaz/spritezero');
var fs = require('fs');
var glob = require('glob');
var path = require('path');

[1, 2, 4].forEach(function(pxRatio) {
    var svgs = glob.sync(path.resolve(path.join(__dirname, 'input/*.svg')))
        .map(function(f) {
            return {
                svg: fs.readFileSync(f),
                id: path.basename(f).replace('.svg', '')
            };
        });
    var pngPath = path.resolve(path.join(__dirname, 'output/sprite@' + pxRatio + '.png'));
    var jsonPath = path.resolve(path.join(__dirname, 'output/sprite@' + pxRatio + '.json'));

    // Pass `true` in the layout parameter to generate a data layout
    // suitable for exporting to a JSON sprite manifest file.
    spritezero.generateLayout({ imgs: svgs, pixelRatio: pxRatio, format: true }, function(err, dataLayout) {
        if (err) return;
        fs.writeFileSync(jsonPath, JSON.stringify(dataLayout));
    });

    // Pass `false` in the layout parameter to generate an image layout
    // suitable for exporting to a PNG sprite image file.
    spritezero.generateLayout({ imgs: svgs, pixelRatio: pxRatio, format: false }, function(err, imageLayout) {
        spritezero.generateImage(imageLayout, function(err, image) {
            if (err) return;
            fs.writeFileSync(pngPath, image);
        });
    });

});

Installation

Requires nodejs v14.15.0 or greater.

$ npm install @jutaz/spritezero