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Improve photo quality
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This commit is contained in:
Andras Schmelczer 2026-06-01 08:02:15 +01:00
parent 0e3067db19
commit 4777985f40
1 changed files with 18 additions and 5 deletions
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23
scripts/generate-assets.mjs
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@ -10,21 +10,30 @@ const sourceDir = path.join(rootDir, 'src/pictures');
const publicPhotoDir = path.join(rootDir, 'public/static/photos');
const generatedDir = path.join(rootDir, 'src/generated');
const catalogPath = path.join(rootDir, 'src/photo-catalog.json');
const widths = [480, 960, 1600, 2400];
// The top width (3200) covers HiDPI/large displays: the frame is shown at up
// to ~2200 CSS px, so a retina viewer needs ~4000+ device px. Sources that are
// smaller aren't upscaled (withoutEnlargement), so we only pay for it where the
// resolution actually exists.
const widths = [480, 960, 1600, 2400, 3200];
const formats = [
{
type: 'image/avif',
extension: 'avif',
options: { quality: 45, effort: 4 },
options: { quality: 58, effort: 4 },
},
{ type: 'image/webp', extension: 'webp', options: { quality: 78 } },
{ type: 'image/webp', extension: 'webp', options: { quality: 82 } },
{
type: 'image/jpeg',
extension: 'jpg',
options: { quality: 82, mozjpeg: true, progressive: true },
options: { quality: 85, mozjpeg: true, progressive: true },
},
];
// Variant filenames are keyed by a hash so unchanged files are skipped. The key
// must cover the encoding settings too — otherwise a quality/width change keeps
// serving the stale files because their names never change.
const encodingKey = JSON.stringify({ widths, formats });
const slugify = (value) =>
value
.replace(/\.[^.]+$/, '')
@ -185,7 +194,11 @@ const generate = async () => {
for (const entry of catalog) {
const inputPath = path.join(sourceDir, entry.file);
const input = await readFile(inputPath);
const hash = createHash('sha256').update(input).digest('hex').slice(0, 10);
const hash = createHash('sha256')
.update(input)
.update(encodingKey)
.digest('hex')
.slice(0, 10);
const metadata = await sharp(input).rotate().metadata();
if (!metadata.width || !metadata.height) {