vliaudatandClaude Opus 5
fccccbd118
With the move to BYOS there is no TRMNL cloud to interpret a Liquid template, so the application draws the screen itself. The pipeline is satori (flexbox to SVG) then resvg (SVG to pixels) then a hand-written 1-bit encoder. Chromium was the alternative and was rejected: half a gigabyte and a real memory appetite in the runtime image, for a screen of eight blocks. Playwright still handles the E2E tests, in its own pinned image, never in the application one. The payoff is testability. The layout is asserted on the element tree and the geometry on the SVG text, so a rendering regression shows up as a readable diff instead of a pixel comparison. The BMP and PNG encoders are verified field by field against their specifications, including an independent CRC-32 for the PNG: a device rejecting a malformed image is expensive to debug from a shop window. Two properties are pinned because the battery depends on them: the same payload must produce byte-identical output, and changed hours must produce different output. The filename handed to the device is a hash of these bytes, and the firmware skips the redraw when it is unchanged. The fonts are vendored into public/fonts and the logo into public/brand, both committed. Rendering must not depend on an install tree, a CDN or the network, or the bytes drift and the panel wakes for nothing. `npm run screen:preview` writes a real 1-bit image plus a magnified view, which is where clipping and thin strokes give themselves up. That is how the week strip was caught clipping and condensed. `npm run brand` rebuilds the assets: it locates the wordmark band in the shop logo rather than hard-coding offsets a future revision would break, and thresholds it with the panel's own encoder. sharp is a devDependency used only there; nothing at runtime needs it. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012cSY9pVhZmJUKNN7wf1Myd
130 lines
4.4 KiB
TypeScript
130 lines
4.4 KiB
TypeScript
/**
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* Renders the panel locally, so the layout can be iterated on without a device.
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*
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* npm run screen:preview
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*
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* Writes `.preview/screen.svg`, `.preview/screen.bmp`, `.preview/screen.png`
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* and an `index.html` that shows the real 1-bit image at 1:1 next to a
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* magnified view, which is where clipping and thin strokes give themselves up.
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*/
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import { mkdir, writeFile } from 'node:fs/promises';
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import path from 'node:path';
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import type { ScreenPayload } from '../lib/screen/contract';
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import { encodeScreen } from '../lib/screen/encode';
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import { SCREEN_HEIGHT, SCREEN_WIDTH } from '../lib/screen/layout';
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import { renderScreenSvg } from '../lib/screen/render';
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import { buildScreenPayload } from '../lib/screen/viewmodel';
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import type { ScheduleContext } from '../lib/schedule/types';
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const ZURICH = 'Europe/Zurich';
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/** A deliberately busy week: a lunch break, a late opening and a holiday. */
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const CONTEXT: ScheduleContext = {
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timezone: ZURICH,
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weekly: [
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{ dayOfWeek: 0, isClosed: true, slots: [] },
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{ dayOfWeek: 1, isClosed: true, slots: [] },
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{ dayOfWeek: 2, isClosed: false, slots: [{ open: '10:00', close: '18:30' }] },
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{
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dayOfWeek: 3,
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isClosed: false,
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slots: [
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{ open: '10:00', close: '13:00' },
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{ open: '14:00', close: '18:30' },
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],
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},
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{ dayOfWeek: 4, isClosed: false, slots: [{ open: '10:00', close: '18:30' }] },
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{ dayOfWeek: 5, isClosed: false, slots: [{ open: '10:00', close: '18:30' }] },
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{ dayOfWeek: 6, isClosed: false, slots: [{ open: '10:00', close: '18:30' }] },
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],
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exceptions: [
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{
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date: '2026-09-24',
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isClosed: false,
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slots: [{ open: '14:00', close: '18:30' }],
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reason: 'TEMPORARY',
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noteFr: 'Ouverture retardée',
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noteEn: 'Late opening',
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source: 'MANUAL',
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},
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],
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vacations: [],
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holidays: [
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{ date: '2026-09-25', nameFr: 'Jeûne genevois', nameEn: 'Geneva Fast', isAutoClosed: true },
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],
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};
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function payload(): ScreenPayload {
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return buildScreenPayload({
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now: new Date('2026-09-23T10:30:00Z'),
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ctx: CONTEXT,
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shopName: 'ITA ITO',
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logoUrl: 'https://trmnl.loxi.ch/brand/logo-eink.png',
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messages: [
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{
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textFr: 'Fermeture exceptionnelle jeudi matin',
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textEn: 'Exceptionally closed on Thursday morning',
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startsAt: null,
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endsAt: null,
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priority: 0,
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isActive: true,
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},
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],
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});
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}
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async function main(): Promise<void> {
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const directory = path.join(process.cwd(), '.preview');
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await mkdir(directory, { recursive: true });
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const screen = payload();
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const svg = await renderScreenSvg(screen);
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await writeFile(path.join(directory, 'screen.svg'), svg);
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await writeFile(path.join(directory, 'screen.bmp'), encodeScreen(svg, 'bmp'));
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await writeFile(path.join(directory, 'screen.png'), encodeScreen(svg, 'png'));
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await writeFile(path.join(directory, 'payload.json'), `${JSON.stringify(screen, null, 2)}\n`);
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await writeFile(path.join(directory, 'index.html'), page());
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console.log(`Preview written to ${path.relative(process.cwd(), directory)}/index.html`);
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console.log('Open it in a browser, or look at screen.png directly.');
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}
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function page(): string {
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return `<!doctype html>
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<html lang="fr">
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<head>
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<meta charset="utf-8">
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<title>Aperçu écran — ITA ITO</title>
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<style>
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body { margin: 0; padding: 32px; background: #f4f4f2; color: #141413;
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font: 15px/1.5 -apple-system, system-ui, sans-serif; }
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h1 { font-size: 18px; font-weight: 600; margin: 0 0 4px; }
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p { margin: 0 0 24px; color: #5e5d59; }
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h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .08em;
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color: #5e5d59; margin: 32px 0 8px; }
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img { display: block; background: #fff; border: 1px solid #d6d3c7;
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image-rendering: pixelated; }
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.one-to-one img { width: ${SCREEN_WIDTH}px; height: ${SCREEN_HEIGHT}px; }
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.magnified img { width: ${SCREEN_WIDTH * 2}px; height: ${SCREEN_HEIGHT * 2}px; }
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</style>
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</head>
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<body>
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<h1>Aperçu de l'écran — ${SCREEN_WIDTH} × ${SCREEN_HEIGHT}, 1 bit</h1>
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<p>Image réelle envoyée à l'appareil, après seuillage. Aucun gris n'est possible ici.</p>
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<h2>Taille réelle</h2>
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<div class="one-to-one"><img src="screen.png" alt="Aperçu à l'échelle 1:1"></div>
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<h2>Agrandi ×2 — pour repérer les coupures et les traits trop fins</h2>
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<div class="magnified"><img src="screen.png" alt="Aperçu agrandi"></div>
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</body>
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</html>
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`;
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}
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main().catch((error: unknown) => {
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console.error(error);
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process.exitCode = 1;
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});
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