Subchapter 14.69

Build Fonts CSS

Hershey Script Med

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Build Fonts CSS

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heygen-com/hyperframes

modes/standard/fonts/build-fonts-css.cjs

JavaScript97 lines4 KB

1#!/usr/bin/env node
2/*
3 * build-fonts-css.cjs — bundle the template fonts into ONE self-contained
4 * fonts.css with base64 data-URI @font-face (no sub-resources, no CDN, no
5 * system-font dependency). This is what makes Standard/Cinematic renders
6 * deterministic on ANY machine: hyperframes' renderer only auto-supplies its
7 * ~18 CANONICAL_FONTS; every other family falls back to a generic font unless
8 * the HTML ships a local @font-face. (hyperframes' own font linter says exactly
9 * this: "Use local @font-face declarations with captured .woff2 files.")
10 *
11 * Source woff2 live in ./files/<slug>-latin-<weight>-normal.woff2 (latin subset
12 * from @fontsource via jsdelivr). Re-run after adding/removing a font:
13 *   node build-fonts-css.cjs
14

build-fonts-css.cjs on GitHub

*/

const fs = require("fs");

const path = require("path");

const FILES = path.join(__dirname, "files");

const OUT = path.join(__dirname, "fonts.css");

// slug → exact CSS family name (must match what templates declare in font-family).

const FAMILY = {

anton: "Anton",

audiowide: "Audiowide",

inter: "Inter",

"baloo-2": "Baloo 2",

bangers: "Bangers",

"bodoni-moda": "Bodoni Moda",

caveat: "Caveat",

cinzel: "Cinzel",

"cormorant-garamond": "Cormorant Garamond",

creepster: "Creepster",

fredoka: "Fredoka",

monoton: "Monoton",

orbitron: "Orbitron",

"permanent-marker": "Permanent Marker",

"press-start-2p": "Press Start 2P",

"saira-stencil-one": "Saira Stencil One",

"shippori-mincho": "Shippori Mincho",

rajdhani: "Rajdhani",

"chakra-petch": "Chakra Petch",

sora: "Sora",

"space-grotesk": "Space Grotesk",

"special-elite": "Special Elite",

teko: "Teko",

vt323: "VT323",

};

const files = fs

.readdirSync(FILES)

.filter((f) => f.endsWith(".woff2"))

.sort();

const faces = [];

let raw = 0;

const seenFamilies = new Set();

for (const f of files) {

const m = f.match(/^(.*)-latin-(\d+)-(normal|italic)\.woff2$/);

if (!m) {

console.error(`[fonts] skip unrecognized filename: ${f}`);

continue;

}

const slug = m[1],

weight = m[2],

style = m[3];

const family = FAMILY[slug];

if (!family) {

console.error(`[fonts] no family mapping for slug "${slug}" (${f}) — add it to FAMILY`);

process.exit(1);

}

const buf = fs.readFileSync(path.join(FILES, f));

raw += buf.length;

seenFamilies.add(family);

faces.push(

`@font-face {\n` +

` font-family: '${family}';\n` +

` font-style: ${style};\n` +

` font-weight: ${weight};\n` +

` font-display: block;\n` + // block (not swap): render text only once the real face is ready — measure-layout + capture see the true glyphs, never a fallback flash

` src: url(data:font/woff2;base64,${buf.toString("base64")}) format('woff2');\n` +

`}`,

);

}

const header =

`/* AUTO-GENERATED by build-fonts-css.cjs — do not edit by hand.\n` +

` ${faces.length} faces / ${seenFamilies.size} families, ${Math.round(raw / 1024)}KB raw woff2 (latin subset, base64-inlined).\n` +

` Families: ${[...seenFamilies].sort().join(", ")}.\n` +

` These are the template fonts NOT in hyperframes' auto-resolved set; inlining\n` +

` them makes every render deterministic regardless of installed system fonts. */\n`;

fs.writeFileSync(OUT, header + "\n" + faces.join("\n\n") + "\n");

const outKb = Math.round(fs.statSync(OUT).size / 1024);

console.log(`[fonts] wrote ${OUT}`);

console.log(

`[fonts] ${faces.length} faces, ${seenFamilies.size} families, ${outKb}KB css (${Math.round(raw / 1024)}KB raw)`,

);

console.log(`[fonts] families: ${[...seenFamilies].sort().join(", ")}`);