ilia
c08a3e482b
- AutoBank branding, phosphor-green terminal aesthetic - Five normalized logo frames that advance on scroll - Logo build scripts and design exploration docs under docs/
41 lines
1.3 KiB
JavaScript
41 lines
1.3 KiB
JavaScript
import sharp from "sharp";
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import { existsSync } from "fs";
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import { join } from "path";
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const REF = "assets/logos/source/hourglass-mint-25pct.png";
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const FULL = process.argv[2];
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const OUT = "assets/logos/source/hourglass-mint-full.png";
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if (!FULL || !existsSync(FULL)) {
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console.error("Usage: node scripts/match-full-brightness.mjs <draft-full.png>");
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process.exit(1);
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}
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/** Mean luminance of non-black pixels (0–255). */
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async function meanLuma(path) {
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const { data } = await sharp(path).ensureAlpha().raw().toBuffer({ resolveWithObject: true });
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let sum = 0;
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let n = 0;
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for (let i = 0; i < data.length; i += 4) {
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const r = data[i];
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const g = data[i + 1];
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const b = data[i + 2];
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const l = 0.2126 * r + 0.7152 * g + 0.0722 * b;
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if (l > 12) {
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sum += l;
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n++;
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}
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}
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return n ? sum / n : 0;
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}
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const refLuma = await meanLuma(REF);
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let fullLuma = await meanLuma(FULL);
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const brightness = Math.min(1, Math.max(0.72, (refLuma / fullLuma) * 0.96));
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await sharp(FULL).modulate({ brightness, saturation: 0.92 }).png().toFile(OUT);
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fullLuma = await meanLuma(OUT);
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console.log(`ref ${refLuma.toFixed(1)} → out ${fullLuma.toFixed(1)} (brightness ${brightness.toFixed(3)})`);
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console.log(`wrote ${OUT} — run npm run logos:normalize`);
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