phash updates!

web/worker.js

@@ -0,0 +1,37 @@
+import init, { hash_all, resize_preview, dct_coefficients, dct_masks, phash_lowfreq, mutate } from './pkg/image_similarity.js';
+
+const ready = init();
+
+onmessage = async (e) => {
+	const { id, op, args } = e.data;
+	await ready;
+	try {
+		const bytes = new Uint8Array(args.buffer);
+		let result;
+		switch (op) {
+			case 'pipeline':
+				result = {
+					resize8: resize_preview(bytes, 8),
+					resize32: resize_preview(bytes, 32),
+					coefficients: dct_coefficients(bytes),
+					masks: dct_masks(bytes),
+					lowfreq: phash_lowfreq(bytes),
+					hashes: hash_all(bytes),
+				};
+				break;
+			case 'hashes':
+				result = { hashes: hash_all(bytes) };
+				break;
+			case 'mutate': {
+				const png = mutate(bytes, args.kind, args.amount);
+				result = { png, hashes: hash_all(png) };
+				break;
+			}
+			default:
+				throw new Error(`unknown op ${op}`);
+		}
+		postMessage({ id, ok: true, result });
+	} catch (err) {
+		postMessage({ id, ok: false, error: String(err) });
+	}
+};