misskey/packages/frontend/src/workers/draw-blurhash.ts

/*
 * SPDX-FileCopyrightText: syuilo and other misskey contributors
 * SPDX-License-Identifier: AGPL-3.0-only
 */

import { render } from 'buraha';

const canvas = new OffscreenCanvas(64, 64);

onmessage = (event) => {
	// console.log(event.data);
	if (!('id' in event.data && typeof event.data.id === 'string')) {
		return;
	}
	if (!('hash' in event.data && typeof event.data.hash === 'string')) {
		return;
	}

	render(event.data.hash, canvas);
	const bitmap = canvas.transferToImageBitmap();
	postMessage({ id: event.data.id, bitmap });
};