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#!/usr/bin/env node
'use strict';
const imageminZopfli = require('imagemin-zopfli');
const {fabric} = require('fabric');
const {DOMParser, XMLSerializer} = require('xmldom');
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, removeDetail} = {}) {
const parser = new DOMParser();
const serializer = new XMLSerializer();
const document = parser.parseFromString(svg);
if (removeDetail) {
for (const el of Array.from(document.getElementsByTagName('g') || [])) {
for (const attribute of Array.from(el.attributes || [])) {
if (attribute.name === 'class' && attribute.value === 'detail-remove') {
el.parentNode.removeChild(el);
}
}
}
}
svg = serializer.serializeToString(document);
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, removeDetail: true});
await generate(svg, resolve(__dirname, '../public/img/apple-touch-icon.png'), {size: 180, bg: true});
}
main().then(exit).catch(exit);
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