lib/fonts.ts

import { registerFont } from "canvas";

let loaded = false;

// ponytail: real TTFs installed by the Dockerfile — FreeType cannot read @fontsource's .woff,
// which fell back to a missing family and rendered every glyph as a tofu box.
const FONT_DIR = process.env.CAPTION_FONT_DIR || "/usr/share/fonts/truetype/reel";

const FONTS = [
  { file: `${FONT_DIR}/Anton-Regular.ttf`, family: "Anton" },
  { file: `${FONT_DIR}/Oswald.ttf`, family: "Oswald" },
];

export function loadFonts() {
  if (loaded) return;
  loaded = true;

  for (const font of FONTS) {
    try {
      registerFont(font.file, { family: font.family });
    } catch (error) {
      // loud on purpose: a missing font means unreadable captions, not a cosmetic downgrade
      console.error(`Failed to register font ${font.family} from ${font.file}:`, error);
    }
  }
}