# Il programma di un cineclub con QR code sui poster

> Ogni film è una risorsa video il cui poster si stampa con un segno di play e un QR code che lo apre su YouTube; nel PDF anche il poster è un link.

- Versione HTML: https://postext.dev/it/cookbook/film-club-video-qr
- Ricetta Nº 131 · Figure e immagini · Livello 2 (Intermedio) · Output: Canvas, PDF
- Generi: Fogli singoli ed effimeri, Riviste e fanzine
- Richiede postext ≥ 1.28.0, postext-pdf ≥ 1.28.0 · provata con 1.31.0, postext-pdf 1.31.0 il 2026-10-13
- Pagine: [1](https://postext.dev/cookbook/film-club-video-qr/en/p01.webp?v=4c3f0ee7), [2](https://postext.dev/cookbook/film-club-video-qr/en/p02.webp?v=4c3f0ee7), [3](https://postext.dev/cookbook/film-club-video-qr/en/p03.webp?v=4c3f0ee7), [4](https://postext.dev/cookbook/film-club-video-qr/en/p04.webp?v=4c3f0ee7), [5](https://postext.dev/cookbook/film-club-video-qr/en/p05.webp?v=4c3f0ee7), [6](https://postext.dev/cookbook/film-club-video-qr/en/p06.webp?v=4c3f0ee7)
- PDF: https://postext.dev/cookbook/film-club-video-qr/en/film-club-video-qr.pdf?v=4c3f0ee7
- Apri nella Sandbox: https://postext.dev/it/sandbox#recipe=film-club-video-qr&lang=en (.postext: https://postext.dev/cookbook/film-club-video-qr/en/film-club-video-qr.postext)
- Ultimo aggiornamento: 2026-10-11
- Altre lingue: [en](https://postext.dev/en/cookbook/film-club-video-qr.md), [es](https://postext.dev/es/cookbook/film-club-video-qr.md), [ca](https://postext.dev/ca/cookbook/film-club-video-qr.md), [de](https://postext.dev/de/cookbook/film-club-video-qr.md), [fr](https://postext.dev/fr/cookbook/film-club-video-qr.md), [pt](https://postext.dev/pt/cookbook/film-club-video-qr.md), [zh](https://postext.dev/zh/cookbook/film-club-video-qr.md), [ja](https://postext.dev/ja/cookbook/film-club-video-qr.md), [ar](https://postext.dev/ar/cookbook/film-club-video-qr.md)

## In breve

Un programma di sei pagine per la stagione autunnale di un cineclub con quattro cortometraggi. Ogni pagina di film mostra un’immagine con un codice che il telefono può inquadrare per vedere il film, e nel PDF l’immagine si può cliccare.

## Che cosa comporrai

Il programma autunnale del Lumen Film Club, un libretto di 165 × 235 mm su carta crema: una fascia di copertina nero schermo con il titolo della stagione in Big Shoulders Display, poi una pagina per ciascuno dei quattro film open della Blender Foundation. Ogni pagina di film si apre con un occhiello rosso per la sessione, il titolo in maiuscole condensate e una riga dei crediti, poi un cartone del titolo su tutta la giustezza di 125 mm. Un segno di play rosso sta nell’angolo in alto a sinistra del cartone e un QR code di 20 mm in basso a destra. Un socio che ha perso un venerdì punta il telefono sul codice e il film si apre su YouTube; nel PDF l’intero cartone è il link. L’indirizzo breve sotto ogni cartone serve per il telefono che non riesce a leggere il codice.

**Questa ricetta risponde a:**

- Come stampo un video in un programma perché il lettore possa inquadrarlo dalla pagina o cliccarlo nel PDF?

## La risposta breve

```js
// script.js, righe 35–60
const videoStyle = {
  // The mark sits top left and the code bottom right, so they never meet on a 70 mm poster.
  playMark: { shape: 'rounded', position: 'top-left', size: mm(8), inset: mm(4),
    color: col('paper'), background: col('accent'), backgroundOpacity: 1 },
  // https://youtu.be/<id> is 28 characters: 29 modules at level Q, and a quiet zone of 2 a side
  // makes modules of 0.61 mm on a 20 mm plate, twice what a phone camera needs.
  qr: { position: 'bottom-right', size: mm(20), inset: mm(3), errorCorrection: 'Q',
    quietZone: 2, color: col('ink'), background: col('paper'), radius: mm(1.2) },
  linkPoster: true, // the PDF draws a link over each poster
};
const film = (f) => ({
  id: f.id, typeId: 'video', kind: 'video', createdAt: 0, updatedAt: 0,
  caption: `${f.title}. ${t(f.about)}.`, altText: t(f.alt),
  note: `${f.licence} · ${f.address}`, // for a phone that does not read the code
  placement: { position: 'here' }, // set where ::resource puts it, under the opener
  video: {
    // The short address printed under the picture, expanded to the one the QR code holds.
    source: 'youtube', url: videoWatchUrl(parseVideoUrl(f.address)), // https://youtu.be/<id>
    // Any picture can be the poster: here a title card drawn below, at its pixel size.
    poster: { fileId: `${f.id}.png`, format: 'png', width: CARD.w, height: CARD.h },
  },
});
// "Film 1" instead of "Video 1.1": one count for the season, not per chapter.
const [FILM, FILMS_NAME] = [t({ en: 'Film', es: 'Película' }), t({ en: 'Films', es: 'Películas' })];
const filmType = (type) => ({ ...type, name: FILM, namePlural: FILMS_NAME, shortLabel: FILM,
  captionPrefix: FILM, numberingTemplate: '{n}', resetOn: 'never' });
```

## Ingredienti

**Insegna**

- [Video come risorse](https://postext.dev/it/docs/document-format.md#video): Video di YouTube, di Vimeo o ospitati in proprio, collocati, con didascalia e numerati come le figure (Video 1.1); la stampa mostra il fotogramma di copertina, il visualizzatore HTML e l’EPUB li riproducono.
- [Copertine dei video: segno di riproduzione e codice QR](https://postext.dev/it/docs/configuration-resources.md#stile-dei-video): videoStyle: il segno di riproduzione e il codice QR stampati sul fotogramma di copertina di un video, il link della copertina e le opzioni del lettore negli output HTML ed EPUB.

**Usa anche**

- [Figure e tabelle come risorse](https://postext.dev/it/docs/document-format.md#risorse)
- [Tipi di risorsa personalizzati](https://postext.dev/it/docs/configuration-resources.md#tipi-di-risorsa)
- [Didascalie numerate](https://postext.dev/it/docs/document-format.md#numerazione-al-primo-rimando)
- [Citazioni che collocano le figure](https://postext.dev/it/docs/document-format.md#rimando-in-linea-la-forma-principale)
- [Figure proprio qui](https://postext.dev/it/docs/document-format.md#inserimento-di-blocco-facoltativo-collocazione-in-linea-esplicita)
- [Stile delle didascalie](https://postext.dev/it/docs/configuration-resources.md#stile-delle-didascalie)
- [Righe di fonte e crediti](https://postext.dev/it/docs/configuration-resources.md#stile-delle-didascalie)
- [Figura e Tabella nella tua lingua](https://postext.dev/it/docs/configuration-resources.md#tipi-di-risorsa)
- [Stili di titolo](https://postext.dev/it/docs/configuration-styles.md#stili-dei-titoli)
- [Attributi dei titoli](https://postext.dev/it/docs/document-format.md#attributi-dei-titoli)
- [Aperture progettate](https://postext.dev/it/docs/configuration-text.md#estensione-e-progetto-grafico-avanzato)
- [Testo, filetti e riquadri nei progetti di pagina](https://postext.dev/it/docs/configuration-page-layout.md#intestazioni-e-piè-di-pagina)
- [Colore della carta](https://postext.dev/it/docs/configuration-page-layout.md#pagina)
- [Tavolozza di colori semantica](https://postext.dev/it/docs/configuration-fonts-colors-viewers.md#tavolozza-dei-colori)
- [Esportazione in PDF](https://postext.dev/it/docs/configuration-programmatic-usage.md#generare-pdf)
- [Testatine secondo il ruolo della pagina](https://postext.dev/it/docs/configuration-page-layout.md#elementi-di-testo)
- [Stili di paragrafo](https://postext.dev/it/docs/configuration-styles.md#stili-di-paragrafo)
- [Font incorporati nel PDF](https://postext.dev/it/docs/configuration-programmatic-usage.md#perché-un-provider-di-font)
- [Testatine per sezione](https://postext.dev/it/docs/configuration-styles.md#stili-dei-titoli)
- [Capitoli non numerati](https://postext.dev/it/docs/configuration-styles.md#stili-dei-titoli)

**La configurazione in breve**

- [`bodyText`](https://postext.dev/it/docs/configuration-text.md#testo-corrente), [`captionStyle`](https://postext.dev/it/docs/configuration-resources.md#stile-delle-didascalie), [`colorPalette`](https://postext.dev/it/docs/configuration-fonts-colors-viewers.md#tavolozza-dei-colori), [`footer`](https://postext.dev/it/docs/configuration-page-layout.md#intestazioni-e-piè-di-pagina), [`header`](https://postext.dev/it/docs/configuration-page-layout.md#intestazioni-e-piè-di-pagina), [`headingStyles`](https://postext.dev/it/docs/configuration-styles.md#stili-dei-titoli), [`headings`](https://postext.dev/it/docs/configuration-text.md#titoli), [`layout`](https://postext.dev/it/docs/configuration-page-layout.md#impaginazione), [`locale`](https://postext.dev/it/docs/configuration-text.md#sillabazione), [`page`](https://postext.dev/it/docs/configuration-page-layout.md#pagina), [`paragraphStyles`](https://postext.dev/it/docs/configuration-styles.md#stili-di-paragrafo), [`resourceTypes`](https://postext.dev/it/docs/configuration-resources.md#tipi-di-risorsa), [`videoStyle`](https://postext.dev/it/docs/configuration-resources.md#stile-dei-video)

**API**

- [`buildDocumentWithFonts`](https://postext.dev/it/docs/configuration-programmatic-usage.md#caricare-i-font-prima-dellimpaginazione), [`decompressWoff2`](https://postext.dev/it/docs/configuration-programmatic-usage.md#provider-di-font-per-il-browser-fontsource--woff2), [`defaultResourceTypes`](https://postext.dev/it/docs/configuration-resources.md#tipi-di-risorsa), [`parseVideoUrl`](https://postext.dev/it/docs/document-format.md#video), [`prepareFonts`](https://postext.dev/it/docs/configuration-programmatic-usage.md#caricare-i-font-prima-dellimpaginazione), [`registerResourceImage`](https://postext.dev/it/docs/architecture.md#superficie-dellapi), [`renderPageToCanvas`](https://postext.dev/it/docs/configuration-programmatic-usage.md#rendere-una-pagina-come-bitmap), [`renderToPdf`](https://postext.dev/it/docs/configuration-programmatic-usage.md#generare-pdf), [`videoWatchUrl`](https://postext.dev/it/docs/document-format.md#video)

**Caratteri**

- Literata (OFL-1.1), Big Shoulders Display (OFL-1.1), Barlow Semi Condensed (OFL-1.1)

## Preparazione

### 1 · Fai di ogni film una risorsa video

Il codice è nella [risposta breve](https://postext.dev/it/cookbook/film-club-video-qr.md#la-risposta-breve) qui sopra. Una risorsa video si colloca, si correda di didascalia e si numera come una figura, e la stampa la mostra come il suo poster con due sovrapposizioni. Il segno di play e il codice vanno in angoli opposti, così non si incontrano mai, e il poster alto 70 mm lascia spazio a entrambi. Il codice misura 20 mm con una zona di rispetto di due moduli: `https://youtu.be/` più un id di undici caratteri fa 29 moduli al livello Q, quindi ogni modulo misura 0,61 mm, circa il doppio di ciò che serve alla fotocamera di un telefono. Q è il livello più alto che mantiene 29 moduli a questa lunghezza (il motore vi porta M da solo); H ne richiederebbe 33 e ridurrebbe i moduli a 0,54 mm. Il tipo predefinito `video` stamperebbe *Video 1.1*; rinominato in *Film* e contato con `{n}` su tutto il documento, numera le quattro sessioni della stagione da *Film 1* a *Film 4*, e le citazioni della copertina stampano le stesse parole.

### 2 · Tieni breve l’indirizzo e lascia che il motore lo espanda

```js
// script.js, righe 64–85
const FILMS = [
  { id: 'elephants-dream', address: 'youtu.be/TLkA0RELQ1g', title: 'Elephants Dream', year: 2006,
    director: 'Bassam Kurdali', licence: 'CC BY 2.5', colour: 'orange', motif: 'gears',
    about: { en: 'Project Orange, Blender Foundation', es: 'Proyecto Orange, Blender Foundation' },
    alt: { en: 'Title card for Elephants Dream: copper gears and cables on deep teal.',
      es: 'Cartela de Elephants Dream: engranajes y cables de cobre sobre verde azulado.' } },
  { id: 'big-buck-bunny', address: 'youtu.be/aqz-KE-bpKQ', title: 'Big Buck Bunny', year: 2008,
    director: 'Sacha Goedegebure', licence: 'CC BY 3.0', colour: 'peach', motif: 'meadow',
    about: { en: 'Project Peach, Blender Institute', es: 'Proyecto Peach, Blender Institute' },
    alt: { en: 'Title card for Big Buck Bunny: a peach sun over green hills and butterflies.',
      es: 'Cartela de Big Buck Bunny: un sol melocotón sobre colinas verdes y mariposas.' } },
  { id: 'tears-of-steel', address: 'youtu.be/R6MlUcmOul8', title: 'Tears of Steel', year: 2012,
    director: 'Ian Hubert', licence: 'CC BY 3.0', colour: 'mango', motif: 'city',
    about: { en: 'Project Mango, Blender Institute', es: 'Proyecto Mango, Blender Institute' },
    alt: { en: 'Title card for Tears of Steel: a skyline with a church spire under a ringed moon.',
      es: 'Cartela de Tears of Steel: un perfil urbano con una aguja de iglesia bajo una luna.' } },
  { id: 'spring', address: 'youtu.be/WhWc3b3KhnY', title: 'Spring', year: 2019,
    director: 'Andy Goralczyk', licence: 'CC BY 4.0', colour: 'spring', motif: 'ridges',
    about: { en: 'Blender Studio', es: 'Blender Studio' },
    alt: { en: 'Title card for Spring: misty ridges, dark firs and one red light.',
      es: 'Cartela de Spring: crestas en la niebla, abetos oscuros y una luz roja.' } },
];
```

L’indirizzo di ogni voce è quello stampato sotto il cartone, `youtu.be/TLkA0RELQ1g`, che il lettore può digitare. `parseVideoUrl` legge qualunque forma di YouTube o Vimeo, e `videoWatchUrl` scrive l’indirizzo canonico a partire da ciò che ha letto: il QR code e il link nel PDF contengono entrambi `https://youtu.be/<id>`. Un errore di battitura che non lascia un id valido fa restituire `undefined` a `parseVideoUrl`, e il pen si ferma prima della costruzione, così un link rotto non arriva mai in tipografia.

### 3 · Disegna un cartone del titolo per il poster

```js
// script.js, righe 247–393
// The 2D canvas paints the motifs and sets the type in the faces the page has loaded.
// Seeded, so every run draws the same cards.
function mulberry32(seed) {
  return () => {
    seed = (seed + 0x6d2b79f5) | 0;
    let r = Math.imul(seed ^ (seed >>> 15), 1 | seed);
    r = (r + Math.imul(r ^ (r >>> 7), 61 | r)) ^ r;
    return ((r ^ (r >>> 14)) >>> 0) / 4294967296;
  };
}
const mix = (a, b, k) => `#${[1, 3, 5].map((i) => Math.round(parseInt(a.slice(i, i + 2), 16)
  * (1 - k) + parseInt(b.slice(i, i + 2), 16) * k).toString(16).padStart(2, '0')).join('')}`;
const MOTIFS = {
  gears(g, rand, bg) { // a machine without end: three gears and the cables between them
    const copper = '#d98a45';
    g.lineWidth = 4;
    for (let i = 0; i < 7; i++) {
      g.strokeStyle = `${copper}88`;
      g.beginPath();
      g.moveTo(0, 90 + rand() * 380);
      g.bezierCurveTo(300 + rand() * 300, rand() * 500, 600 + rand() * 200, 100 + rand() * 400,
        1000 + rand() * 300, 120 + rand() * 300);
      g.stroke();
    }
    for (const [x, y, r, teeth] of [[1150, 300, 215, 18], [835, 160, 112, 11], [905, 455, 88, 9]]) {
      g.beginPath();
      for (let k = 0; k <= teeth * 4; k++) {
        const a = (k / (teeth * 4)) * Math.PI * 2;
        const rr = k % 4 < 2 ? r : r * 0.84;
        g.lineTo(x + rr * Math.cos(a), y + rr * Math.sin(a));
      }
      g.fillStyle = mix(bg, '#000000', 0.25);
      g.fill();
      g.lineWidth = 6;
      g.strokeStyle = copper;
      g.stroke();
      g.beginPath();
      g.arc(x, y, r * 0.3, 0, Math.PI * 2);
      g.stroke();
    }
  },
  meadow(g, rand, bg) { // a peach sun, three hills, butterflies
    g.fillStyle = '#f5b98a';
    g.beginPath();
    g.arc(1180, 250, 165, 0, Math.PI * 2);
    g.fill();
    for (let i = 0; i < 6; i++) { // butterflies: two pairs of wings each
      const [x, y, s] = [760 + rand() * 640, 90 + rand() * 300, 14 + rand() * 12];
      g.fillStyle = i % 2 ? '#f6f1e7' : '#e9b44c';
      for (const side of [-1, 1]) {
        g.beginPath();
        g.moveTo(x, y);
        g.lineTo(x + side * s * 1.4, y - s);
        g.lineTo(x + side * s * 1.1, y + s * 0.7);
        g.fill();
      }
    }
    [[470, 0.15], [560, 0.35], [650, 0.55]].forEach(([base, dark], layer) => {
      g.fillStyle = mix(bg, '#000000', dark);
      g.beginPath();
      g.moveTo(0, CARD.h);
      for (let x = 0; x <= CARD.w; x += 20) {
        g.lineTo(x, base + 60 * Math.sin(x / (260 + layer * 90) + layer * 2));
      }
      g.lineTo(CARD.w, CARD.h);
      g.fill();
    });
  },
  city(g, rand, bg) { // a skyline, one church spire, a ringed moon
    g.strokeStyle = '#e9b44c';
    g.lineWidth = 5;
    g.beginPath();
    g.arc(1240, 210, 105, 0, Math.PI * 2);
    g.stroke();
    g.beginPath();
    g.ellipse(1240, 210, 190, 34, -0.3, 0, Math.PI * 2);
    g.stroke();
    const shade = mix(bg, '#000000', 0.45);
    for (let x = 520; x < CARD.w; x += 46 + rand() * 60) {
      const [w, h] = [40 + rand() * 70, 90 + rand() * 300];
      g.fillStyle = shade;
      g.fillRect(x, 560 - h, w, CARD.h);
      g.fillStyle = '#e9b44c';
      for (let wy = 580 - h; wy < 540; wy += 26) {
        if (rand() < 0.18) g.fillRect(x + 8 + rand() * (w - 22), wy, 8, 12);
      }
    }
    g.fillStyle = shade; // the Oude Kerk's spire stands over the rest
    g.beginPath();
    g.moveTo(940, 560);
    g.lineTo(1000, 90);
    g.lineTo(1060, 560);
    g.fill();
    g.fillRect(0, 560, CARD.w, CARD.h);
  },
  ridges(g, rand, bg) { // misty ridges, dark firs and one red light
    g.fillStyle = mix(bg, '#f6f1e7', 0.55);
    g.beginPath();
    g.arc(1260, 170, 85, 0, Math.PI * 2);
    g.fill();
    [[300, 0.35], [400, 0.15], [500, -0.15], [600, -0.4]].forEach(([base, k]) => {
      g.fillStyle = k > 0 ? mix(bg, '#f6f1e7', k) : mix(bg, '#000000', -k);
      g.beginPath();
      g.moveTo(0, CARD.h);
      for (let x = 0; x <= CARD.w; x += 80) g.lineTo(x, base - rand() * 110);
      g.lineTo(CARD.w, CARD.h);
      g.fill();
    });
    g.fillStyle = mix(bg, '#000000', 0.6);
    for (let i = 0; i < 9; i++) {
      const [x, h] = [920 + i * 58 + rand() * 30, 130 + rand() * 120];
      g.beginPath();
      g.moveTo(x - h * 0.22, 640);
      g.lineTo(x, 640 - h);
      g.lineTo(x + h * 0.22, 640);
      g.fill();
    }
    g.fillStyle = '#e0452c';
    g.beginPath();
    g.arc(640, 500, 11, 0, Math.PI * 2);
    g.fill();
  },
};
async function titleCard(f) {
  const canvas = Object.assign(document.createElement('canvas'), { width: CARD.w, height: CARD.h });
  const g = canvas.getContext('2d');
  const bg = palette[f.colour];
  g.fillStyle = bg;
  g.fillRect(0, 0, CARD.w, CARD.h);
  MOTIFS[f.motif](g, mulberry32(f.year), bg);
  // Lower left, clear of the play mark (top left) and the QR plate (bottom right).
  g.fillStyle = '#e9b44c';
  g.font = `600 34px "${LABEL}"`;
  g.letterSpacing = '7px';
  g.fillText(`${t({ en: 'Blender open movie', es: 'Película abierta de Blender' })} · ${f.year}`
    .toUpperCase(), 96, 612);
  g.letterSpacing = '0px';
  g.fillStyle = '#f6f1e7';
  let size = 154;
  do g.font = `800 ${size -= 4}px "${DISPLAY}"`;
  while (g.measureText(f.title.toUpperCase()).width > 1080);
  g.fillText(f.title.toUpperCase(), 92, 760);
  g.font = `500 40px "${LABEL}"`;
  g.fillText(`${t({ en: 'Directed by', es: 'Dirigida por' })} ${f.director}`, 96, 826);
  const blob = await new Promise((done) => canvas.toBlob(done, 'image/png'));
  await loadImage(`${f.id}.png`, URL.createObjectURL(blob)); // the canvas and the PDF
}
```

Nella maggior parte dei progetti il poster è un fotogramma del film: la Sandbox lo recupera quando inserisci l’indirizzo, e nel codice `youtubePosterUrls(id)` elenca le miniature di YouTube dalla più grande (1280 × 720) in giù. I fotogrammi delle piattaforme appartengono ai film e alle loro licenze, e un programma stampato può usare cartoni del titolo propri, quindi qui ogni film ne riceve uno disegnato su un canvas nel suo colore, con il motivo, il titolo, l’anno e il regista del film. Il cartone lascia liberi gli angoli in alto a sinistra e in basso a destra per le sovrapposizioni. Un canvas disegna ogni cartone e ne compone il testo nei caratteri del libretto, che a quel punto la pagina ha già caricato. Il cartone misura 1600 × 900 pixel, il 16:9 dei film, e `video.poster` dichiara quella dimensione: alla giustezza di 125 mm si stampa a 325 dpi. Un video senza poster si stampa come un riquadro scuro 16:9 con lo stesso segno e lo stesso codice, e la costruzione lo segnala con un avviso.

### 4 · Metti il poster sotto l’apertura

```js
// script.js, righe 89–135
const text = (id, content, fontFamily, size, color, placement, more = {}) => ({ kind: 'text',
  id, content, fontFamily, fontSize: pt(size), color: col(color), align: 'left',
  overflow: 'wrap', placement, ...more }); // a foot wraps too, where the default is '…'
const at = (to, edge, x, y, width) => ({ anchor: { to, edge }, offset: { x: mm(x), y: mm(y) },
  ...(width && { size: { width: mm(width), height: 'auto' } }) });
const caps = (s) => ({ fontWeight: 600, textTransform: 'uppercase', letterSpacing: pt(s * 0.2) });
const BAND = 126; // mm: the cover's screen-black band, from the trim's top edge
const MEASURE = TRIM.w - INNER - OUTER;
const CHIP = (MEASURE - 9) / 4; // four chips in the films' colours, 3 mm apart
const coverStyle = () => ({
  id: 'cover', numbered: false, footer: { elements: [] }, // no folio on the cover
  marginBottom: pt(LEAD), // a line of paper between the band and the text
  advancedDesign: { enabled: true, minHeight: mm(BAND - TOP), slot: { elements: [
    { kind: 'box', id: 'band', style: { backgroundColor: col('ink') },
      placement: { ...at('page', 'top-left', 0, 0), size: { width: 'fill', height: mm(BAND) } } },
    text('kicker', '{attr.kicker}', LABEL, 9, 'gold', at('page', 'top-left', INNER, 14), caps(9)),
    text('title', '{titleText}', DISPLAY, 88, 'paper', at('page', 'top-left', INNER - 1, 28,
      MEASURE), { fontWeight: 800, textTransform: 'uppercase', lineHeight: 0.86 }),
    text('standfirst', '{attr.standfirst}', TEXT, 13, 'paper',
      at('page', 'top-left', INNER, 85, 104), { italic: true, lineHeight: 1.3 }),
    ...FILMS.flatMap((f, i) => [
      { kind: 'box', id: `chip-${i}`, style: { backgroundColor: col(f.colour) },
        placement: { ...at('page', 'top-left', INNER + i * (CHIP + 3), 103),
          size: { width: mm(CHIP), height: mm(9) } } },
      text(`chip-label-${i}`, t({ en: `${6 + 7 * i} Nov`, es: `${6 + 7 * i} nov` }), LABEL, 8,
        'paper', at('page', 'top-left', INNER + i * (CHIP + 3) + 2.5, 105.6), caps(8)),
    ]),
    text('dates', '{attr.dates}', LABEL, 8.5, 'gold', at('page', 'top-left', INNER, 116), caps(9)),
  ] } },
});
const opener = () => ({ enabled: true, minHeight: mm(22), slot: { elements: [
  text('kicker', '{attr.kicker}', LABEL, 8.5, 'accent', at('container', 'top-left', 0, 0),
    caps(8.5)),
  text('title', '{titleText}', DISPLAY, 34, 'ink', at('#kicker', 'below', 0, 1.5, MEASURE),
    { fontWeight: 800, textTransform: 'uppercase', lineHeight: 1 }),
  text('credits', '{attr.credits}', LABEL, 9.5, 'muted', at('#title', 'below', 0, 1.5, MEASURE),
    { fontWeight: 500 }),
] } });
const foot = (id, content, parity, edge, x, more = {}) => text(id, content, LABEL, 7.5, 'muted',
  at('page', edge, x, TRIM.h - 13), { ...caps(7.5), parity, pages: 'all', ...more });
const footer = { elements: [ // folios at the outer foot, the programme's name beside them
  foot('verso-folio', '{pageNumber}', 'even', 'top-left', OUTER, { color: col('ink') }),
  foot('verso-title', '{title}', 'even', 'top-left', OUTER + 7),
  foot('recto-title', '{title}', 'odd', 'top-right', -(OUTER + 7), { align: 'right' }),
  foot('recto-folio', '{pageNumber}', 'odd', 'top-right', -OUTER,
    { color: col('ink'), align: 'right' }),
] };
```

Ogni film è un titolo di primo livello la cui apertura impila l’occhiello della sessione, il titolo e la riga dei crediti, tutti e tre dagli attributi del titolo. `::resource` mette il poster subito sotto con `position: 'here'`, così ogni pagina di film ha lo stesso ordine. La copertina è uno stile di titolo la cui fascia, il cui titolo e i cui chip sono elementi del progetto grafico; i quattro chip prendono i colori dei film dalla palette, come i cartoni del titolo.

### 5 · Una sola palette per le pagine e i cartoni

```js
// script.js, righe 16–27
const palette = {
  ink: '#1d1b20', paper: '#f6f1e7', // text and the cover band; the page
  accent: '#b8321c', gold: '#e9b44c', muted: '#6b6157', // kickers; the band's accent; credits
  orange: '#1f3d44', peach: '#3f6b35', mango: '#2c3746', spring: '#3d5a78', // the title cards
};
// A linked colour carries its hex too, so designs and defaults read the same value.
const col = (id) => ({ hex: palette[id], model: 'hex', paletteId: id });
const colorPalette = [
  ...Object.entries(palette).map(([id, hex]) => ({ id, name: id, value: { hex, model: 'hex' } })),
  // The engine's defaults link to 'main-color': point it at the accent, so nothing prints blue.
  { id: 'main-color', name: 'accent (defaults)', value: { hex: palette.accent, model: 'hex' } },
];
```

Il nero, il rosso e il crema sono quelli del libretto; i quattro colori dei film (chiamati come i progetti Blender Orange, Peach e Mango, più Spring) dipingono sia i chip della copertina sia i cartoni. Il segno di play è dello stesso rosso degli occhielli, e la piastra del QR code è il crema della pagina con i moduli in nero: un codice scuro su una piastra chiara, il contrasto che ogni app di lettura si aspetta.

## La ricetta completa

Un unico file, composto a partire dalla cartella della ricetta con il testo di esempio e il kit comune del Ricettario già inclusi; costruisce la propria pagina. Per eseguirlo, mettilo in uno `<script type="module">` di una pagina vuota, oppure incollalo nel pannello JS di un nuovo pen di CodePen (come modulo). Importa postext da esm.sh: non c’è niente da installare né da compilare.

- Cartella della ricetta: https://github.com/drnachio/postext/tree/main/cookbook/film-club-video-qr

### script.js

```js
// ═══ Postext Cookbook · Nº 131 · Film club programme with video QR codes ═════════
// https://postext.dev/en/cookbook/film-club-video-qr
// Code: MIT · Text and title cards: original (CC BY 4.0) · Films: Blender Foundation (CC BY)
// Fonts: Literata, Big Shoulders Display, Barlow Semi Condensed (SIL OFL) · Needs postext ≥ 1.28.0
import {
  buildDocumentWithFonts, prepareFonts, renderPageToCanvas, registerResourceImage,
  defaultResourceTypes, parseVideoUrl, videoWatchUrl,
} from 'https://esm.sh/postext';
import { renderToPdf, decompressWoff2 } from 'https://esm.sh/postext-pdf';

const LANG = 'en'; // @lang: the language of the sample document ('en' | 'es')
const RECIPE = 'film-club-video-qr';

// ─── 1 · Design ─────────────────────────────────────────────────────────────
// #region palette: a screen-black ink, one red, and a colour for each film
const palette = {
  ink: '#1d1b20', paper: '#f6f1e7', // text and the cover band; the page
  accent: '#b8321c', gold: '#e9b44c', muted: '#6b6157', // kickers; the band's accent; credits
  orange: '#1f3d44', peach: '#3f6b35', mango: '#2c3746', spring: '#3d5a78', // the title cards
};
// A linked colour carries its hex too, so designs and defaults read the same value.
const col = (id) => ({ hex: palette[id], model: 'hex', paletteId: id });
const colorPalette = [
  ...Object.entries(palette).map(([id, hex]) => ({ id, name: id, value: { hex, model: 'hex' } })),
  // The engine's defaults link to 'main-color': point it at the accent, so nothing prints blue.
  { id: 'main-color', name: 'accent (defaults)', value: { hex: palette.accent, model: 'hex' } },
];
// #endregion
const [TEXT, DISPLAY, LABEL] = ['Literata', 'Big Shoulders Display', 'Barlow Semi Condensed'];
const TRIM = { w: 165, h: 235 }; // mm: a programme booklet, a little larger than A5
const [TOP, INNER, OUTER, LEAD] = [22, 18, 22, 14]; // margins in mm (a 125 mm measure); leading, pt
const CARD = { w: 1600, h: 900 }; // px: the title cards, 16:9 like the films, 325 dpi at 125 mm

// #region answer: a video resource per film, printed as its poster with a play mark and a QR code
const videoStyle = {
  // The mark sits top left and the code bottom right, so they never meet on a 70 mm poster.
  playMark: { shape: 'rounded', position: 'top-left', size: mm(8), inset: mm(4),
    color: col('paper'), background: col('accent'), backgroundOpacity: 1 },
  // https://youtu.be/<id> is 28 characters: 29 modules at level Q, and a quiet zone of 2 a side
  // makes modules of 0.61 mm on a 20 mm plate, twice what a phone camera needs.
  qr: { position: 'bottom-right', size: mm(20), inset: mm(3), errorCorrection: 'Q',
    quietZone: 2, color: col('ink'), background: col('paper'), radius: mm(1.2) },
  linkPoster: true, // the PDF draws a link over each poster
};
const film = (f) => ({
  id: f.id, typeId: 'video', kind: 'video', createdAt: 0, updatedAt: 0,
  caption: `${f.title}. ${t(f.about)}.`, altText: t(f.alt),
  note: `${f.licence} · ${f.address}`, // for a phone that does not read the code
  placement: { position: 'here' }, // set where ::resource puts it, under the opener
  video: {
    // The short address printed under the picture, expanded to the one the QR code holds.
    source: 'youtube', url: videoWatchUrl(parseVideoUrl(f.address)), // https://youtu.be/<id>
    // Any picture can be the poster: here a title card drawn below, at its pixel size.
    poster: { fileId: `${f.id}.png`, format: 'png', width: CARD.w, height: CARD.h },
  },
});
// "Film 1" instead of "Video 1.1": one count for the season, not per chapter.
const [FILM, FILMS_NAME] = [t({ en: 'Film', es: 'Película' }), t({ en: 'Films', es: 'Películas' })];
const filmType = (type) => ({ ...type, name: FILM, namePlural: FILMS_NAME, shortLabel: FILM,
  captionPrefix: FILM, numberingTemplate: '{n}', resetOn: 'never' });
// #endregion

// #region films: the four films, their YouTube addresses and what their title cards draw
const FILMS = [
  { id: 'elephants-dream', address: 'youtu.be/TLkA0RELQ1g', title: 'Elephants Dream', year: 2006,
    director: 'Bassam Kurdali', licence: 'CC BY 2.5', colour: 'orange', motif: 'gears',
    about: { en: 'Project Orange, Blender Foundation', es: 'Proyecto Orange, Blender Foundation' },
    alt: { en: 'Title card for Elephants Dream: copper gears and cables on deep teal.',
      es: 'Cartela de Elephants Dream: engranajes y cables de cobre sobre verde azulado.' } },
  { id: 'big-buck-bunny', address: 'youtu.be/aqz-KE-bpKQ', title: 'Big Buck Bunny', year: 2008,
    director: 'Sacha Goedegebure', licence: 'CC BY 3.0', colour: 'peach', motif: 'meadow',
    about: { en: 'Project Peach, Blender Institute', es: 'Proyecto Peach, Blender Institute' },
    alt: { en: 'Title card for Big Buck Bunny: a peach sun over green hills and butterflies.',
      es: 'Cartela de Big Buck Bunny: un sol melocotón sobre colinas verdes y mariposas.' } },
  { id: 'tears-of-steel', address: 'youtu.be/R6MlUcmOul8', title: 'Tears of Steel', year: 2012,
    director: 'Ian Hubert', licence: 'CC BY 3.0', colour: 'mango', motif: 'city',
    about: { en: 'Project Mango, Blender Institute', es: 'Proyecto Mango, Blender Institute' },
    alt: { en: 'Title card for Tears of Steel: a skyline with a church spire under a ringed moon.',
      es: 'Cartela de Tears of Steel: un perfil urbano con una aguja de iglesia bajo una luna.' } },
  { id: 'spring', address: 'youtu.be/WhWc3b3KhnY', title: 'Spring', year: 2019,
    director: 'Andy Goralczyk', licence: 'CC BY 4.0', colour: 'spring', motif: 'ridges',
    about: { en: 'Blender Studio', es: 'Blender Studio' },
    alt: { en: 'Title card for Spring: misty ridges, dark firs and one red light.',
      es: 'Cartela de Spring: crestas en la niebla, abetos oscuros y una luz roja.' } },
];
// #endregion

// #region furniture: the cover band, the film openers and the folios
const text = (id, content, fontFamily, size, color, placement, more = {}) => ({ kind: 'text',
  id, content, fontFamily, fontSize: pt(size), color: col(color), align: 'left',
  overflow: 'wrap', placement, ...more }); // a foot wraps too, where the default is '…'
const at = (to, edge, x, y, width) => ({ anchor: { to, edge }, offset: { x: mm(x), y: mm(y) },
  ...(width && { size: { width: mm(width), height: 'auto' } }) });
const caps = (s) => ({ fontWeight: 600, textTransform: 'uppercase', letterSpacing: pt(s * 0.2) });
const BAND = 126; // mm: the cover's screen-black band, from the trim's top edge
const MEASURE = TRIM.w - INNER - OUTER;
const CHIP = (MEASURE - 9) / 4; // four chips in the films' colours, 3 mm apart
const coverStyle = () => ({
  id: 'cover', numbered: false, footer: { elements: [] }, // no folio on the cover
  marginBottom: pt(LEAD), // a line of paper between the band and the text
  advancedDesign: { enabled: true, minHeight: mm(BAND - TOP), slot: { elements: [
    { kind: 'box', id: 'band', style: { backgroundColor: col('ink') },
      placement: { ...at('page', 'top-left', 0, 0), size: { width: 'fill', height: mm(BAND) } } },
    text('kicker', '{attr.kicker}', LABEL, 9, 'gold', at('page', 'top-left', INNER, 14), caps(9)),
    text('title', '{titleText}', DISPLAY, 88, 'paper', at('page', 'top-left', INNER - 1, 28,
      MEASURE), { fontWeight: 800, textTransform: 'uppercase', lineHeight: 0.86 }),
    text('standfirst', '{attr.standfirst}', TEXT, 13, 'paper',
      at('page', 'top-left', INNER, 85, 104), { italic: true, lineHeight: 1.3 }),
    ...FILMS.flatMap((f, i) => [
      { kind: 'box', id: `chip-${i}`, style: { backgroundColor: col(f.colour) },
        placement: { ...at('page', 'top-left', INNER + i * (CHIP + 3), 103),
          size: { width: mm(CHIP), height: mm(9) } } },
      text(`chip-label-${i}`, t({ en: `${6 + 7 * i} Nov`, es: `${6 + 7 * i} nov` }), LABEL, 8,
        'paper', at('page', 'top-left', INNER + i * (CHIP + 3) + 2.5, 105.6), caps(8)),
    ]),
    text('dates', '{attr.dates}', LABEL, 8.5, 'gold', at('page', 'top-left', INNER, 116), caps(9)),
  ] } },
});
const opener = () => ({ enabled: true, minHeight: mm(22), slot: { elements: [
  text('kicker', '{attr.kicker}', LABEL, 8.5, 'accent', at('container', 'top-left', 0, 0),
    caps(8.5)),
  text('title', '{titleText}', DISPLAY, 34, 'ink', at('#kicker', 'below', 0, 1.5, MEASURE),
    { fontWeight: 800, textTransform: 'uppercase', lineHeight: 1 }),
  text('credits', '{attr.credits}', LABEL, 9.5, 'muted', at('#title', 'below', 0, 1.5, MEASURE),
    { fontWeight: 500 }),
] } });
const foot = (id, content, parity, edge, x, more = {}) => text(id, content, LABEL, 7.5, 'muted',
  at('page', edge, x, TRIM.h - 13), { ...caps(7.5), parity, pages: 'all', ...more });
const footer = { elements: [ // folios at the outer foot, the programme's name beside them
  foot('verso-folio', '{pageNumber}', 'even', 'top-left', OUTER, { color: col('ink') }),
  foot('verso-title', '{title}', 'even', 'top-left', OUTER + 7),
  foot('recto-title', '{title}', 'odd', 'top-right', -(OUTER + 7), { align: 'right' }),
  foot('recto-folio', '{pageNumber}', 'odd', 'top-right', -OUTER,
    { color: col('ink'), align: 'right' }),
] };
// #endregion

const config = () => ({
  locale: t({ en: 'en-us', es: 'es' }), colorPalette, videoStyle,
  resourceTypes: defaultResourceTypes(LANG).map((ty) => (ty.id === 'video' ? filmType(ty) : ty)),
  page: { sizePreset: 'custom', width: mm(TRIM.w), height: mm(TRIM.h), dpi: 150,
    backgroundColor: col('paper'),
    margins: { top: mm(TOP), bottom: mm(24), left: mm(INNER), right: mm(OUTER), mirror: true } },
  layout: { layoutType: 'single' },
  bodyText: { fontFamily: TEXT, fontSize: pt(9.8), lineHeight: pt(LEAD), color: col('ink'),
    boldColor: col('ink'), italicColor: col('ink'), referenceColor: col('ink'),
    textAlign: 'justify', firstLineIndent: mm(4.5), indentAfterHeading: false,
    // The dictionary divided Áms-terdam, Blen-der and You-Tube: the list keeps them whole.
    hyphenation: { enabled: true, exceptions: ['Ámsterdam', 'Blender', 'YouTube'] },
    optimalLineBreaking: true, avoidWidows: true, avoidOrphans: true, avoidRunts: true,
  },
  headings: { fontFamily: DISPLAY, fontWeight: 700, color: col('ink'), levels: [
    // parity 'any': each film opens the next page, with no blank page before it.
    { level: 1, fontSize: pt(34), breakBefore: { enabled: true, parity: 'any' },
      marginBottom: pt(0), advancedDesign: opener() }, // minHeight alone sets the gap
    { level: 2, fontSize: pt(13), lineHeight: pt(LEAD), textTransform: 'uppercase',
      letterSpacing: pt(0.6), marginTop: pt(LEAD), marginBottom: pt(0) },
  ] },
  headingStyles: [coverStyle()],
  captionStyle: { fontFamily: LABEL, fontSize: pt(8.5), color: col('ink'), gap: pt(5),
    labelBold: true, labelColor: col('accent'),
    note: { fontSize: pt(7.5), color: col('muted') } },
  paragraphStyles: [ // ragged and unhyphenated, so no web address breaks
    { id: 'credits', fontFamily: LABEL, fontWeight: 500, fontSize: pt(9), lineHeight: pt(12),
      color: col('ink'), boldColor: col('ink'), textAlign: 'left', hyphenation: false,
      firstLineIndent: pt(0), spaceBetween: pt(3) },
    { id: 'colophon', fontFamily: LABEL, fontSize: pt(7.5), lineHeight: pt(10), color: col('muted'),
      textAlign: 'left', hyphenation: false, firstLineIndent: pt(0), marginTop: pt(LEAD) },
  ],
  header: { elements: [] }, footer,
});

// ─── 2 · Content ────────────────────────────────────────────────────────────
const markdown = String.raw`---
title: "Lumen Film Club · Open Movies"
author: "Lumen Film Club"
---

# Open Movies {style="cover" kicker="Lumen Film Club · Autumn 2026" standfirst="Four short films made in the open, one for each Friday in November" dates="Fridays at 20:30 · Studio 2, Harbour Arts Centre"}

Every film in this season was made in the open. The Blender Foundation, the Dutch non-profit behind the free 3D software Blender, has produced short films since 2006 to test and improve its own tools, and it publishes each one under a Creative Commons licence together with the files used to make it. We chose four of them: Elephants Dream, the first, from 2006 (:ref{id="elephants-dream"}); Big Buck Bunny, from 2008 (:ref{id="big-buck-bunny"}); Tears of Steel, shot with actors in Amsterdam in 2012 (:ref{id="tears-of-steel"}); and Spring, from 2019 (:ref{id="spring"}).

None of them runs longer than twelve minutes, so each evening pairs one film with half an hour of conversation. Every film page carries a title card with a code in its corner. Point a phone camera at the code and the film opens on YouTube; in the PDF of this programme the card itself is the link. If you miss a Friday, watch at home and come to the next one.

# Elephants Dream {kicker="Session 1 · Friday 6 November" credits="Directed by Bassam Kurdali · Netherlands, 2006 · 11 min · English"}

::resource{id="elephants-dream"}

Emo, a young man, follows the older Proog through a machine that seems to have no end: rooms of switchboards and cables, a flock of mechanical birds, a lift thrown upwards through a row of shutters. Proog believes in the machine and wants Emo to admire it. Emo does not see what Proog sees, and the film leaves the question open on purpose.

Elephants Dream was made in Amsterdam from September 2005 by a team of seven artists, under the code name Project Orange, with money from DVD pre-sales and the Netherlands Media Art Institute. When it came out in March 2006 the production files went online with it, so anyone could study how each shot was built. The voices are Cas Jansen and Tygo Gernandt, and the score is by Jan Morgenstern.

# Big Buck Bunny {kicker="Session 2 · Friday 13 November" credits="Directed by Sacha Goedegebure · Netherlands, 2008 · 10 min · No dialogue"}

::resource{id="big-buck-bunny"}

A large and gentle rabbit spends his morning watching butterflies until three rodents, led by a flying squirrel, start pelting him with fruit and kill two of the butterflies. He answers with a series of traps. Nobody speaks: the story is told in timing and gesture, as in the cartoon shorts it remembers.

Project Peach brought seven artists to the Blender Institute in Amsterdam from October 2007 to April 2008, and the film had its premiere there on 10 April 2008. The fur, hair and grass of the forest pushed the software forward, and the new features reached everyone in Blender 2.46. Because it is bright, varied and free to use, Big Buck Bunny is also a standard test clip for video players, so you may have seen it before without knowing its name.

# Tears of Steel {kicker="Session 3 · Friday 20 November" credits="Written and directed by Ian Hubert · Netherlands, 2012 · 12 min · English"}

::resource{id="tears-of-steel"}

Forty years after a young couple break up on a bridge in Amsterdam, the robots built by one of them have taken over the city. A team of scientists gathers in the Oude Kerk to stage that moment again and change how it ends. It is the only live-action film of the season: the actors were filmed in Amsterdam, and the sets, the robots and the battle were added in Blender.

Project Mango ran through 2012 to improve Blender’s visual-effects tools, such as camera tracking and compositing, and part of its money came from the Netherlands Film Fund. The film was released online on 26 September 2012. Derek de Lint plays the older Thom, and Joris Kerbosch shot it. Stay for the credits, which the makers ask every screening to keep.

# Spring {kicker="Session 4 · Friday 27 November" credits="Written and directed by Andy Goralczyk · Netherlands, 2019 · 8 min · No dialogue"}

::resource{id="spring"}

A shepherd girl and her dog climb down from the sunlit heights into a frozen forest, where giant spirits hold back the change of season. With her staff and a chime she has to lead them out of the valley, so that the ice can melt. Nobody speaks; the music of Torin Borrowdale carries the story from the first shot to the last.

Andy Goralczyk, who had animated on Elephants Dream thirteen years earlier, wrote and directed the film, drawing on his childhood in the mountains of Germany. The team started in Blender 2.79 and moved early to 2.80, then still in beta, so Spring served as a test of that release. It had its premiere on YouTube on 4 April 2019, and its characters and files are published under CC BY 4.0.

# At the Club {kicker="Practical notes" credits="Studio 2, Harbour Arts Centre · Doors open at 20:00"}

Screenings start at 20:30. Entry is free for members and €3 for guests; membership costs €15 a year and can be paid at the door. The studio seats sixty, and the conversation after each film lasts about half an hour.

## Why we can show these films

Each film is published under a Creative Commons Attribution licence, which lets anyone copy, share and screen the work, in public and with an entry fee, as long as the makers are credited. The Blender Foundation asks that the credit roll stay at the end of each film, and we keep it.

## Watching at home

The codes on the title cards open the films on Blender’s YouTube channels. If your phone does not read a code, type the short address printed under the picture. The PDF of this programme, on the club’s website, links each card to its film.

## Credits

:::paragraphs{style="credits"}
**Elephants Dream** © 2006 Blender Foundation and Netherlands Media Art Institute · CC BY 2.5 · orange.blender.org

**Big Buck Bunny** © 2008 Blender Foundation · CC BY 3.0 · peach.blender.org

**Tears of Steel** © 2012 Blender Foundation · CC BY 3.0 · mango.blender.org

**Spring** © 2019 Blender Foundation (Blender Studio) · CC BY 4.0 · studio.blender.org
:::

:::paragraphs{style="colophon"}
Set in Literata, Big Shoulders Display and Barlow Semi Condensed (SIL Open Font License) · Text and title cards: original, CC BY 4.0 · Films: Blender Foundation, CC BY.
:::
`; // content.<lang>.md, inlined by the Cookbook

// #region art: a title card per film, drawn on a canvas with the page's own fonts
// The 2D canvas paints the motifs and sets the type in the faces the page has loaded.
// Seeded, so every run draws the same cards.
function mulberry32(seed) {
  return () => {
    seed = (seed + 0x6d2b79f5) | 0;
    let r = Math.imul(seed ^ (seed >>> 15), 1 | seed);
    r = (r + Math.imul(r ^ (r >>> 7), 61 | r)) ^ r;
    return ((r ^ (r >>> 14)) >>> 0) / 4294967296;
  };
}
const mix = (a, b, k) => `#${[1, 3, 5].map((i) => Math.round(parseInt(a.slice(i, i + 2), 16)
  * (1 - k) + parseInt(b.slice(i, i + 2), 16) * k).toString(16).padStart(2, '0')).join('')}`;
const MOTIFS = {
  gears(g, rand, bg) { // a machine without end: three gears and the cables between them
    const copper = '#d98a45';
    g.lineWidth = 4;
    for (let i = 0; i < 7; i++) {
      g.strokeStyle = `${copper}88`;
      g.beginPath();
      g.moveTo(0, 90 + rand() * 380);
      g.bezierCurveTo(300 + rand() * 300, rand() * 500, 600 + rand() * 200, 100 + rand() * 400,
        1000 + rand() * 300, 120 + rand() * 300);
      g.stroke();
    }
    for (const [x, y, r, teeth] of [[1150, 300, 215, 18], [835, 160, 112, 11], [905, 455, 88, 9]]) {
      g.beginPath();
      for (let k = 0; k <= teeth * 4; k++) {
        const a = (k / (teeth * 4)) * Math.PI * 2;
        const rr = k % 4 < 2 ? r : r * 0.84;
        g.lineTo(x + rr * Math.cos(a), y + rr * Math.sin(a));
      }
      g.fillStyle = mix(bg, '#000000', 0.25);
      g.fill();
      g.lineWidth = 6;
      g.strokeStyle = copper;
      g.stroke();
      g.beginPath();
      g.arc(x, y, r * 0.3, 0, Math.PI * 2);
      g.stroke();
    }
  },
  meadow(g, rand, bg) { // a peach sun, three hills, butterflies
    g.fillStyle = '#f5b98a';
    g.beginPath();
    g.arc(1180, 250, 165, 0, Math.PI * 2);
    g.fill();
    for (let i = 0; i < 6; i++) { // butterflies: two pairs of wings each
      const [x, y, s] = [760 + rand() * 640, 90 + rand() * 300, 14 + rand() * 12];
      g.fillStyle = i % 2 ? '#f6f1e7' : '#e9b44c';
      for (const side of [-1, 1]) {
        g.beginPath();
        g.moveTo(x, y);
        g.lineTo(x + side * s * 1.4, y - s);
        g.lineTo(x + side * s * 1.1, y + s * 0.7);
        g.fill();
      }
    }
    [[470, 0.15], [560, 0.35], [650, 0.55]].forEach(([base, dark], layer) => {
      g.fillStyle = mix(bg, '#000000', dark);
      g.beginPath();
      g.moveTo(0, CARD.h);
      for (let x = 0; x <= CARD.w; x += 20) {
        g.lineTo(x, base + 60 * Math.sin(x / (260 + layer * 90) + layer * 2));
      }
      g.lineTo(CARD.w, CARD.h);
      g.fill();
    });
  },
  city(g, rand, bg) { // a skyline, one church spire, a ringed moon
    g.strokeStyle = '#e9b44c';
    g.lineWidth = 5;
    g.beginPath();
    g.arc(1240, 210, 105, 0, Math.PI * 2);
    g.stroke();
    g.beginPath();
    g.ellipse(1240, 210, 190, 34, -0.3, 0, Math.PI * 2);
    g.stroke();
    const shade = mix(bg, '#000000', 0.45);
    for (let x = 520; x < CARD.w; x += 46 + rand() * 60) {
      const [w, h] = [40 + rand() * 70, 90 + rand() * 300];
      g.fillStyle = shade;
      g.fillRect(x, 560 - h, w, CARD.h);
      g.fillStyle = '#e9b44c';
      for (let wy = 580 - h; wy < 540; wy += 26) {
        if (rand() < 0.18) g.fillRect(x + 8 + rand() * (w - 22), wy, 8, 12);
      }
    }
    g.fillStyle = shade; // the Oude Kerk's spire stands over the rest
    g.beginPath();
    g.moveTo(940, 560);
    g.lineTo(1000, 90);
    g.lineTo(1060, 560);
    g.fill();
    g.fillRect(0, 560, CARD.w, CARD.h);
  },
  ridges(g, rand, bg) { // misty ridges, dark firs and one red light
    g.fillStyle = mix(bg, '#f6f1e7', 0.55);
    g.beginPath();
    g.arc(1260, 170, 85, 0, Math.PI * 2);
    g.fill();
    [[300, 0.35], [400, 0.15], [500, -0.15], [600, -0.4]].forEach(([base, k]) => {
      g.fillStyle = k > 0 ? mix(bg, '#f6f1e7', k) : mix(bg, '#000000', -k);
      g.beginPath();
      g.moveTo(0, CARD.h);
      for (let x = 0; x <= CARD.w; x += 80) g.lineTo(x, base - rand() * 110);
      g.lineTo(CARD.w, CARD.h);
      g.fill();
    });
    g.fillStyle = mix(bg, '#000000', 0.6);
    for (let i = 0; i < 9; i++) {
      const [x, h] = [920 + i * 58 + rand() * 30, 130 + rand() * 120];
      g.beginPath();
      g.moveTo(x - h * 0.22, 640);
      g.lineTo(x, 640 - h);
      g.lineTo(x + h * 0.22, 640);
      g.fill();
    }
    g.fillStyle = '#e0452c';
    g.beginPath();
    g.arc(640, 500, 11, 0, Math.PI * 2);
    g.fill();
  },
};
async function titleCard(f) {
  const canvas = Object.assign(document.createElement('canvas'), { width: CARD.w, height: CARD.h });
  const g = canvas.getContext('2d');
  const bg = palette[f.colour];
  g.fillStyle = bg;
  g.fillRect(0, 0, CARD.w, CARD.h);
  MOTIFS[f.motif](g, mulberry32(f.year), bg);
  // Lower left, clear of the play mark (top left) and the QR plate (bottom right).
  g.fillStyle = '#e9b44c';
  g.font = `600 34px "${LABEL}"`;
  g.letterSpacing = '7px';
  g.fillText(`${t({ en: 'Blender open movie', es: 'Película abierta de Blender' })} · ${f.year}`
    .toUpperCase(), 96, 612);
  g.letterSpacing = '0px';
  g.fillStyle = '#f6f1e7';
  let size = 154;
  do g.font = `800 ${size -= 4}px "${DISPLAY}"`;
  while (g.measureText(f.title.toUpperCase()).width > 1080);
  g.fillText(f.title.toUpperCase(), 92, 760);
  g.font = `500 40px "${LABEL}"`;
  g.fillText(`${t({ en: 'Directed by', es: 'Dirigida por' })} ${f.director}`, 96, 826);
  const blob = await new Promise((done) => canvas.toBlob(done, 'image/png'));
  await loadImage(`${f.id}.png`, URL.createObjectURL(blob)); // the canvas and the PDF
}
// #endregion

// ─── 3 · Fonts ──────────────────────────────────────────────────────────────
const FONTS = { // every face the pages and the cards use
  Literata: ['400', '400i'], // the programme notes, the cover's standfirst
  'Big Shoulders Display': ['700', '800'], // titles, on the pages and the cards
  'Barlow Semi Condensed': ['500', '600', '700'], // kickers, credits, captions, folios
};

// ─── 4 · Build & show ───────────────────────────────────────────────────────
await prepareFonts(markdown, config(), kitFonts(FONTS)); // before the cards: they set type too
for (const f of FILMS) await titleCard(f);
const resources = FILMS.map(film);
const doc = await buildDocumentWithFonts({ markdown, resources }, config(), kitFonts(FONTS));
showPages(doc, { title: t({ en: 'Film club programme', es: 'Programa de cineclub' }) });
offerPdf(() => renderToPdf(doc, { fontProvider: fontsourceProvider, resourceBytes: imageBytes }),
  `${RECIPE}.pdf`);

// ─── Kit ── helpers shared by every Cookbook recipe · postext.dev/cookbook ─────

// ─── Kit · core v1 ── the same in every recipe · postext.dev/cookbook
function mm(value) { return { value, unit: 'mm' }; }
function pt(value) { return { value, unit: 'pt' }; }
function em(value) { return { value, unit: 'em' }; }
/** The sample language's string: t({ en: 'Figure', es: 'Figura' }). */
function t(strings) { return strings[LANG] ?? Object.values(strings)[0]; }
/** A file in this recipe's assets folder, served from the Postext repo by jsDelivr. */
function asset(file) { return `https://cdn.jsdelivr.net/gh/drnachio/postext@main/cookbook/${RECIPE}/assets/${file}`; }

// ─── Kit · fonts v3 ── the same in every recipe · postext.dev/cookbook
// Postext loads the faces a config asks for before layout (prepareFonts,
// buildDocumentWithFonts) and asks the kit for the files: Fontsource's, the
// files the PDF embeds too.

/** The options of buildDocumentWithFonts / prepareFonts / withLoadedFonts:
 *  the Fontsource resolver, and the faces of FONTS loaded with the ones the
 *  config names. FONTS = { 'Family Name': ['400', '400i', '700'] }. */
function kitFonts(FONTS = {}) {
  const faces = Object.entries(FONTS).flatMap(([family, specs]) => specs.map((spec) =>
    ({ family, weight: parseInt(spec, 10), style: spec.endsWith('i') ? 'italic' : 'normal' })));
  return { resolve: fontsourceResolver, faces };
}

/** A face's Fontsource files, in a fixed order: latin, then latin-ext and greek
 *  when `text` needs them and the family ships them (kitSubsetsFor), each with
 *  its unicode-range. Null for a weight or slant Fontsource does not ship. */
async function fontsourceResolver(family, weight, style, { text = '' } = {}) {
  const id = fontsourceId(family);
  const meta = await fontsourceMeta(family);
  if (meta && !(meta.weights.includes(weight) && meta.styles.includes(style))) return null;
  kitStatus('Loading fonts…');
  const at = await fontsourceAt(id);
  return ['latin', ...kitSubsetsFor(text, meta)].map((subset) => ({
    source: `${at}files/${id}-${subset}-${weight}-${style}.woff2`,
    unicodeRange: kitRanges()[subset],
  }));
}

/** The unicode-range of each Fontsource file the kit loads (a function: the
 *  kit is inlined after the pen's code, which runs before a const would be set). */
function kitRanges() {
  return {
    latin: 'U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,'
      + 'U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD',
    'latin-ext': 'U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,'
      + 'U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF',
    greek: 'U+0370-03FF',
  };
}

/** For the cjk, arabic and comics blocks, which add their own files: the
 *  faces of `faces` = { 'Family Name': ['400', '400i', '700'] }. `text` is the sample:
 *  č ł † α χ also load latin-ext and greek files (kitSubsetsFor). With
 *  `optional`, a face Fontsource does not ship is skipped instead of failing.
 *  The files are added once all have loaded, in the order asked (latin, then
 *  latin-ext, then greek), whatever order they arrive in: the last one added
 *  wins a character two files hold. Resolves to the number of faces added. */
async function loadFonts(faces, text = '', { optional = false } = {}) {
  kitStatus('Loading fonts…');
  const ranges = kitRanges();
  const jobs = [];
  for (const [family, specs] of Object.entries(faces)) {
    const id = fontsourceId(family);
    const todo = [...new Set(specs)].map((spec) => [parseInt(spec, 10), spec.endsWith('i') ? 'italic' : 'normal'])
      .filter(([weight, style]) => !hasFace(family, weight, style)); // before any await
    const at = fontsourceAt(id);
    const meta = optional || /[^\0-ÿ]/u.test(text) ? await fontsourceMeta(family) : null;
    const subsets = ['latin', ...kitSubsetsFor(text, meta)];
    for (const [weight, style] of todo) {
      if (optional && !(meta?.weights.includes(weight) && meta.styles.includes(style))) continue;
      for (const subset of subsets) {
        const url = `${await at}files/${id}-${subset}-${weight}-${style}.woff2`;
        const face = new FontFace(family, `url(${url}) format('woff2')`,
          { weight: String(weight), style, unicodeRange: ranges[subset] });
        jobs.push(face.load().catch(() => {
          if (subset === 'latin' && !optional) throw new Error(`Fontsource has no ${family} ${weight} ${style}`);
        }));
      }
    }
  }
  const ready = await Promise.all(jobs).catch((error) => { kitFail(error); throw error; });
  return ready.filter((face) => face && document.fonts.add(face)).length;
}

/** A loaded FontFace covers this family, weight and style (fonts.check() would
 *  also say yes for families nobody declared). */
function hasFace(family, weight, style) {
  for (const face of document.fonts) {
    if (face.status !== 'loaded' || face.style !== style) continue;
    if (face.family.replace(/^["']|["']$/g, '') !== family) continue;
    const [low, high = low] = face.weight.split(' ').map(Number);
    if (weight >= low && weight <= high) return true;
  }
  return false;
}

/** The files beyond latin `text` needs that `meta`'s family ships. */
function kitSubsetsFor(text, meta) {
  return [[/[Ā-˿ᴀ-ᶿḀ-ỿ†ℓⱠ-Ɀ꜠-ꟿ]/u, 'latin-ext'], [/[Ͱ-Ͽ]/u, 'greek']]
    .filter(([re, x]) => re.test(text) && meta?.subsets?.includes(x)).map(([, x]) => x);
}

/** Fontsource's id for a family: 'Source Serif 4' → 'source-serif-4'. */
function fontsourceId(family) { return family.toLowerCase().replace(/\s+/g, '-'); }

/** A package's folder at the one version @5 names now (#766). */
function fontsourceAt(id, u = `https://cdn.jsdelivr.net/npm/@fontsource/${id}@`) {
  return (fontsourceAt.c ??= {})[id] ??= fetch(u + '5/package.json').then((r) => r.json())
    .then((p) => p.version || 5, () => 5).then((v) => `${u}${v}/`);
}

/** The family's Fontsource metadata (weights, styles, subsets), or null. */
function fontsourceMeta(family) {
  fontsourceMeta.cache ??= new Map();
  const id = fontsourceId(family);
  if (!fontsourceMeta.cache.has(id)) {
    fontsourceMeta.cache.set(id, fetch(`https://api.fontsource.org/v1/fonts/${id}`)
      .then((res) => (res.ok ? res.json() : null), () => null));
  }
  return fontsourceMeta.cache.get(id);
}

// ─── Kit · viewer v2 ── the same in every recipe · postext.dev/cookbook
/** The pages as spreads on a dark desk, page 1 alone, then verso | recto,
 *  each painted when it scrolls near. Other options go to renderPageToCanvas. */
function showPages(docs, { title, width = 460, ...render } = {}) {
  const root = viewer(title);
  const pages = [docs].flat().flatMap((doc) =>
    doc.pages.map((page) => ({ doc, page, n: (doc.pageIndexOffset ?? 0) + page.index })));
  const spreads = [];
  let verso = null;
  for (const p of pages) {
    if (p.n % 2 === 1) { if (verso) spreads.push([verso, null]); verso = p; }
    else { spreads.push([verso, p]); verso = null; }
  }
  if (verso) spreads.push([verso, null]);
  const density = Math.min(window.devicePixelRatio || 1, 2);
  showPages.painter?.disconnect();
  const painter = new IntersectionObserver((entries) => {
    for (const { isIntersecting, target } of entries) {
      if (!isIntersecting) continue;
      painter.unobserve(target);
      const { doc, page } = target.postext;
      renderPageToCanvas(page, doc, target, { ...render, scale: (width * density) / page.width });
    }
  }, { rootMargin: '800px' });
  showPages.painter = painter;
  root.replaceChildren(...spreads.map((pair) => {
    const spread = document.createElement('div');
    spread.className = 'pt-spread';
    for (const p of pair) {
      const figure = document.createElement('figure');
      if (p) {
        const label = p.page.pageLabel || String(p.n + 1);
        const canvas = document.createElement('canvas');
        canvas.postext = p;
        canvas.style.aspectRatio = `${p.page.width} / ${p.page.height}`;
        canvas.setAttribute('role', 'img');
        canvas.setAttribute('aria-label', `Page ${label}`);
        const folio = document.createElement('figcaption');
        folio.textContent = label;
        figure.append(canvas, folio);
        painter.observe(canvas);
      } else figure.className = 'pt-blank';
      spread.append(figure);
    }
    return spread;
  }));
  kitStatus(`${pages.length} ${pages.length === 1 ? 'page' : 'pages'}`);
  document.documentElement.dataset.postext = 'ready';
  return pages.length;
}

/** The desk, the bar and the error reporting, created once. */
function viewer(title) {
  if (!document.getElementById('pt-kit')) {
    document.head.insertAdjacentHTML('beforeend', `<style id="pt-kit">
      :root { color-scheme: dark; }
      body { margin: 0; background: #0e1014; color: #b9bcc4; font: 13px/1.45 system-ui, sans-serif; }
      #pt-bar { position: sticky; top: 0; z-index: 1; display: flex; flex-wrap: wrap; align-items: center;
        gap: 6px 16px; padding: 10px 16px; background: rgb(14 16 20 / .92); backdrop-filter: blur(6px);
        border-bottom: 1px solid #23262d; }
      #pt-bar strong { color: #f4f1ea; font-weight: 600; }
      #pt-actions { display: flex; gap: 12px; margin-left: auto; }
      #pt-actions a, #pt-actions button { color: #d8a21a; font: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
      #pages { display: grid; justify-items: center; gap: 48px; padding: 32px 16px 72px; }
      .pt-spread { display: flex; }
      .pt-spread figure { margin: 0; width: min(460px, 44vw); }
      .pt-spread canvas { display: block; width: 100%; background: #fff;
        box-shadow: 0 1px 2px rgb(0 0 0 / .5), 0 22px 44px -16px rgb(0 0 0 / .8); }
      .pt-spread figure:first-child canvas { box-shadow: inset -14px 0 14px -14px rgb(0 0 0 / .18), 0 1px 2px rgb(0 0 0 / .5), 0 22px 44px -16px rgb(0 0 0 / .8); }
      .pt-spread figcaption { margin-top: 10px; text-align: center; font: 600 10px/1 system-ui, sans-serif;
        letter-spacing: .18em; text-transform: uppercase; color: #6c7079; }
      .pt-blank { visibility: hidden; }
      @media (max-width: 760px) {
        .pt-spread { flex-direction: column; gap: 32px; }
        .pt-spread figure { width: min(460px, 92vw); }
        .pt-blank { display: none; }
      }
    </style>`);
    document.body.insertAdjacentHTML('afterbegin',
      '<header id="pt-bar"><strong id="pt-title"></strong><span id="pt-status" role="status"></span><span id="pt-actions"></span></header>');
    document.getElementById('pt-title').textContent = document.title || 'Postext';
    addEventListener('error', (event) => kitFail(event.error ?? event.message));
    addEventListener('unhandledrejection', (event) => kitFail(event.reason));
  }
  if (title) document.getElementById('pt-title').textContent = title;
  return document.getElementById('pages')
    ?? document.body.appendChild(Object.assign(document.createElement('main'), { id: 'pages' }));
}

function kitStatus(text) {
  viewer();
  document.getElementById('pt-status').textContent = text;
}

function kitFail(error) {
  document.documentElement.dataset.postext = 'error';
  kitStatus(`Error: ${error?.message ?? error}`);
}

// ─── Kit · pdf v3 ── the same in every recipe that exports a PDF
/** The Fontsource files the screen used, as TrueType, with their range and
 *  place: the nearest weight the family ships, upright with no italic;
 *  latin, then what its letters need (kitSubsetsFor). */
async function fontsourceProvider(family, weight, style, request) {
  const id = fontsourceId(family);
  const meta = await fontsourceMeta(family);
  const weights = meta?.weights?.length ? meta.weights : [400, 700];
  const w = weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a));
  const s = style === 'italic' && meta && !meta.styles.includes('italic') ? 'normal' : style;
  const text = String.fromCodePoint(...(request?.codePoints ?? []));
  const files = await Promise.all(['latin', ...kitSubsetsFor(text, meta)].map(async (subset, order) => {
    const res = await fetch(`${await fontsourceAt(id)}files/${id}-${subset}-${w}-${s}.woff2`);
    if (!res.ok) throw new Error(`Fontsource has no ${family} ${w} ${s} ${subset}`);
    return Object.assign(await decompressWoff2(new Uint8Array(await res.arrayBuffer())),
      { unicodeRange: kitRanges()[subset], order });
  }));
  return files.length === 1 ? files[0] : files;
}

/** A "Build the PDF" button; then "Open the PDF" (a new tab: CodePen's frame
 *  shows no PDFs) and a download link. */
function offerPdf(makePdf, filename) {
  viewer();
  const button = Object.assign(document.createElement('button'), { type: 'button', textContent: 'Build the PDF' });
  button.dataset.postextPdf = filename;
  button.addEventListener('click', async () => {
    button.disabled = true;
    button.textContent = 'Building the PDF…';
    try {
      const bytes = await makePdf();
      const url = URL.createObjectURL(new Blob([bytes], { type: 'application/pdf' }));
      const size = `${Math.max(1, Math.round(bytes.length / 1024))} KB`;
      button.replaceWith(
        Object.assign(document.createElement('a'), { href: url, target: '_blank', rel: 'noopener', textContent: 'Open the PDF ↗' }),
        Object.assign(document.createElement('a'), { href: url, download: filename, textContent: `Download ${filename} · ${size}` }));
    } catch (error) {
      button.disabled = false;
      button.textContent = 'Build the PDF';
      kitFail(error);
    }
  });
  document.getElementById('pt-actions').append(button);
}

// ─── Kit · images v3 ── recipes with pictures · postext.dev/cookbook
/** Registers a photo or PNG for the canvas and keeps its bytes for the PDF.
 *  fetch → ImageBitmap never taints the canvas (a plain cross-origin <img> would). */
async function loadImage(fileId, url) {
  const res = await fetch(url);
  if (!res.ok) throw new Error(`Image not found (${res.status}): ${url}`);
  const bytes = new Uint8Array(await res.arrayBuffer());
  registerResourceImage(fileId, await createImageBitmap(new Blob([bytes])));
  (loadImage.bytes ??= new Map()).set(fileId, bytes);
}

/** Registers SVG markup as a vector image, its fonts inside (inlineSvgFonts, ≥ 1.25).
 *  `options` go to registerResourceImage: { singleInk: true } tints it on the canvas. */
async function loadSvg(fileId, svg, options) {
  if (typeof inlineSvgFonts === 'function') svg = await inlineSvgFonts(svg, svgFaces);
  const img = new Image();
  img.src = `data:image/svg+xml;charset=utf-8,${encodeURIComponent(svg)}`;
  await img.decode();
  registerResourceImage(fileId, img, options);
  (loadImage.bytes ??= new Map()).set(fileId, new TextEncoder().encode(svg));
}

/** A face's Fontsource files: nearest weight; latin + what the SVG sets. */
async function svgFaces(family, weight, style, { codePoints = [] } = {}) {
  const [id, m] = [fontsourceId(family), await fontsourceMeta(family)];
  const w = m?.weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a)) ?? weight;
  const s = m?.styles.includes(style) === false ? 'normal' : style;
  return Promise.all(['latin', ...kitSubsetsFor(String.fromCodePoint(...codePoints), m)].map(async (x) => new Uint8Array(
    await (await fetch(`${await fontsourceAt(id)}files/${id}-${x}-${w}-${s}.woff2`)).arrayBuffer())));
}

/** renderToPdf({ resourceBytes: imageBytes }) */
function imageBytes(fileId) { return loadImage.bytes?.get(fileId); }

/** renderToHtml({ resourceImageUrl: imageUrl }) */
function imageUrl(fileId) {
  const bytes = imageBytes(fileId);
  if (!bytes) return undefined;
  imageUrl.urls ??= new Map();
  if (!imageUrl.urls.has(fileId)) {
    const type = /\.svg$/i.test(fileId) ? 'image/svg+xml' : /\.png$/i.test(fileId) ? 'image/png' : 'image/jpeg';
    imageUrl.urls.set(fileId, URL.createObjectURL(new Blob([bytes], { type })));
  }
  return imageUrl.urls.get(fileId);
}

// ─── /Kit ───────────────────────────────────────────────────────────────────────
```

## Varianti

### Stampa il fotogramma del film

Recupera la miniatura più grande di YouTube invece di disegnare un cartone, quando la licenza del film e il tuo hosting lo permettono, e dichiara la dimensione del fotogramma.

```diff
-for (const f of FILMS) await titleCard(f); // after the fonts: the cards set type too
+for (const f of FILMS) { // 1280 × 720, maxresdefault.jpg, the first of youtubePosterUrls
+  await loadImage(`${f.id}.png`, youtubePosterUrls(parseVideoUrl(f.address).id)[0]);
+}
```

### Riproduci i film nell’edizione HTML

`renderToHtml` compone ogni video come il player di YouTube con privacy avanzata, e un EPUB mostra il poster collegato al film; `videoStyle.html: 'poster'` mantiene anche a schermo il cartone stampato. Vedi [Video](https://postext.dev/it/docs/document-format.md#video) e [Stile dei video](https://postext.dev/it/docs/configuration-resources.md#stile-dei-video).

### Centra un segno di play più grande

Un segno al centro del cartone si riconosce come un player video anche dall’altra parte della stanza; i cartoni tengono libera dal testo la fascia centrale, quindi copre solo il motivo.

```diff
-  playMark: { shape: 'rounded', position: 'top-left', size: mm(8), inset: mm(4),
+  playMark: { shape: 'rounded', position: 'center', size: mm(14), inset: mm(4),
```

## Errori frequenti

- **Le bitmap prendono la dimensione di stampa da una risoluzione: dichiarala, non pixel alla dimensione di stampa.** Una bitmap senza risoluzione viene impaginata a un pixel per pixel di impaginazione ai dpi del documento, quindi una foto di 2400 px è larga 406 mm su una pagina a 150 dpi. Dichiara i pixel reali del file e dai all’immagine la sua risoluzione (bitmap.resolution: 300), o imposta layout.bitmapResolution per ogni bitmap: un valore in ppi, o 'file' per leggere quello indicato dal file. La colonna limita comunque l’immagine.
- **::resource{id="…"} accetta solo virgolette doppie.** Un inserimento a blocco viene riconosciuto solo come ::resource{id="…"} con virgolette doppie; qualsiasi altra forma resta nel testo come riga visibile.
- **Avviso di impaginazione: Video senza locandina** (`videoWithoutPoster`). Una risorsa video usata dal testo non ha `video.poster`, quindi la stampa mostra un riquadro scuro nelle proporzioni del video con il simbolo di riproduzione e il codice QR. Soluzione: Dai una locandina al video: un fotogramma del video o un’immagine tua (`{ fileId, format, width, height }`), e registra la sua bitmap come qualsiasi immagine.

- Il motore limita il codice al 45 % del lato corto del poster e il segno di play al 40 %. Su un poster piccolo un codice di 20 mm diventa più piccolo, e con lui i suoi moduli: un codice di 20 mm richiede un poster alto almeno 45 mm.
- Due sovrapposizioni con la stessa posizione si coprono a vicenda. Dai al segno di play e al codice angoli diversi, e disegna il poster con quegli angoli liberi.

## Crediti

- Ricetta: Ignacio Ferro ([@drnachio](https://github.com/drnachio))
- Immagini: Title card for Elephants Dream, drawn in code. The film, © 2006 Blender Foundation and Netherlands Media Art Institute, CC BY 2.5, is linked from the page, not reproduced: Ignacio Ferro ([fonte](https://studio.blender.org/films/elephants-dream/)), originale
- Immagini: Title card for Big Buck Bunny, drawn in code. The film, © 2008 Blender Foundation, CC BY 3.0, is linked from the page, not reproduced: Ignacio Ferro ([fonte](https://studio.blender.org/films/big-buck-bunny/)), originale
- Immagini: Title card for Tears of Steel, drawn in code. The film, © 2012 Blender Foundation, CC BY 3.0, is linked from the page, not reproduced: Ignacio Ferro ([fonte](https://studio.blender.org/films/tears-of-steel/)), originale
- Immagini: Title card for Spring, drawn in code. The film, © 2019 Blender Foundation (Blender Studio), CC BY 4.0, is linked from the page, not reproduced: Ignacio Ferro ([fonte](https://studio.blender.org/films/spring/)), originale
- Caratteri: Literata (OFL-1.1), Big Shoulders Display (OFL-1.1), Barlow Semi Condensed (OFL-1.1)
- Codice: MIT · Contenuto di esempio: CC-BY-4.0

## Ricette correlate

- [Nº 009 · Figure che flottano dove le citi](https://postext.dev/it/cookbook/figures-float-where-cited.md): Un capitolo a due colonne con sette figure numerate: sei flottano dal primo :ref al primo posto che il placement consente; una sta dove la mette ::resource. · Livello 3 (Avanzato) · Libri di testo
- [Nº 068 · Saggio fotografico con tavole al vivo](https://postext.dev/it/cookbook/photo-essay-full-bleed.md): Tavole come stili di titolo costruiti da un elenco, ognuna stesa sulla pagina fino al rifilo; la tavola della tempesta attraversa la doppia pagina in due metà. · Livello 2 (Intermedio) · Libri fotografici
- [Nº 051 · Fanzine riso a due inchiostri: illustrazioni in un solo spot](https://postext.dev/it/cookbook/riso-zine-single-ink.md): Una fanzine di quattro pagine per una risograph a due tamburi: i disegni a colori si stampano come tinte del rosa, ricolorati dal motore sul canvas e nel PDF. · Livello 3 (Avanzato) · Riviste e fanzine