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Added webp image creation

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This commit is contained in:
John Poole 2026-03-05 12:49:09 -08:00
commit 358dd3eac0
1 changed files with 24 additions and 1 deletions
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25
web/batch_glb_png/batch_render.js
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@ -4,6 +4,9 @@
* 20260228 ChatGPT
* $Header$
*
* This script takes a JSON job description and batch renders PNGs from GLBs
* using a headless browser and a local static server.
*
* Example:
* node batch_render.js job.json
*/
@ -14,10 +17,12 @@ import process from 'node:process';
import http from 'node:http';
import { pathToFileURL, fileURLToPath } from 'node:url';
import puppeteer from 'puppeteer';
import sharp from 'sharp';
function die (msg) { console.error(msg); process.exit(1); }
function ensureDir(p) { fs.mkdirSync(p, { recursive: true }); }
function listFiles(dir, suffix) {
const out = [];
for (const ent of fs.readdirSync(dir, { withFileTypes: true })) {
@ -102,6 +107,8 @@ async function main() {
const pattern = (job.pattern ?? ".glb").toLowerCase();
ensureDir(outputDirAbs);
const webpDirAbs = path.join(outputDirAbs, '../webp');
ensureDir(webpDirAbs);
const glbs = listFiles(inputDirAbs, pattern);
if (glbs.length === 0) die(`No files ending with '${pattern}' found under ${inputDirAbs}`);
@ -166,9 +173,25 @@ async function main() {
throw new Error(`No pngDataUrl produced for ${glbAbs} (status=${JSON.stringify(status)})`);
}
//const b64 = status.pngDataUrl.replace(/^data:image\/png;base64,/, '');
//fs.writeFileSync(outAbs, Buffer.from(b64, 'base64'));
//console.log(`WROTE\t${outAbs}`);
const b64 = status.pngDataUrl.replace(/^data:image\/png;base64,/, '');
fs.writeFileSync(outAbs, Buffer.from(b64, 'base64'));
const pngBuffer = Buffer.from(b64, 'base64');
/* write PNG */
fs.writeFileSync(outAbs, pngBuffer);
console.log(`WROTE\t${outAbs}`);
/* write WEBP */
const webpName = sanitizeBasename(glbAbs).replace(/\.glb$/i, '.webp');
const webpAbs = path.join(webpDirAbs, webpName);
await sharp(pngBuffer)
.webp({ quality: 92 })
.toFile(webpAbs);
console.log(`WROTE\t${webpAbs}`);
}
await page.close();