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forgejo/build/generate-images.js
techknowlogick f8a668ab0c
Clean up SVG (#13680)
* Clean up SVG

* update per feedback

* fix css style

* Delete gitea.png

* no new line at end of file

* fix newline?

Co-authored-by: 6543 <6543@obermui.de>
2020-12-17 16:33:53 -05:00

84 lines
2.5 KiB
JavaScript
Executable file

#!/usr/bin/env node
'use strict';
const imageminZopfli = require('imagemin-zopfli');
const {fabric} = require('fabric');
const {readFile, writeFile} = require('fs').promises;
const {resolve} = require('path');
const Svgo = require('svgo');
function exit(err) {
if (err) console.error(err);
process.exit(err ? 1 : 0);
}
function loadSvg(svg) {
return new Promise((resolve) => {
fabric.loadSVGFromString(svg, (objects, options) => {
resolve({objects, options});
});
});
}
async function generateSvgFavicon(svg, outputFile) {
const svgo = new Svgo({
plugins: [
{removeDimensions: true},
{
addAttributesToSVGElement: {
attributes: [
{'width': '32'},
{'height': '32'},
],
},
},
],
});
const {data} = await svgo.optimize(svg);
await writeFile(outputFile, data);
}
async function generate(svg, outputFile, {size, bg}) {
const {objects, options} = await loadSvg(svg);
const canvas = new fabric.Canvas();
canvas.setDimensions({width: size, height: size});
const ctx = canvas.getContext('2d');
ctx.scale(options.width ? (size / options.width) : 1, options.height ? (size / options.height) : 1);
if (bg) {
canvas.add(new fabric.Rect({
left: 0,
top: 0,
height: size * (1 / (size / options.height)),
width: size * (1 / (size / options.width)),
fill: 'white',
}));
}
canvas.add(fabric.util.groupSVGElements(objects, options));
canvas.renderAll();
let png = Buffer.from([]);
for await (const chunk of canvas.createPNGStream()) {
png = Buffer.concat([png, chunk]);
}
png = await imageminZopfli({more: true})(png);
await writeFile(outputFile, png);
}
async function main() {
const svg = await readFile(resolve(__dirname, '../assets/logo.svg'), 'utf8');
await generateSvgFavicon(svg, resolve(__dirname, '../public/img/favicon.svg'));
await generate(svg, resolve(__dirname, '../public/img/gitea-lg.png'), {size: 880});
await generate(svg, resolve(__dirname, '../public/img/gitea-512.png'), {size: 512});
await generate(svg, resolve(__dirname, '../public/img/gitea-192.png'), {size: 192});
await generate(svg, resolve(__dirname, '../public/img/gitea-sm.png'), {size: 120});
await generate(svg, resolve(__dirname, '../public/img/avatar_default.png'), {size: 200});
await generate(svg, resolve(__dirname, '../public/img/favicon.png'), {size: 180});
await generate(svg, resolve(__dirname, '../public/img/apple-touch-icon.png'), {size: 180, bg: true});
}
main().then(exit).catch(exit);