npm i @imagescript/codecs

import { png } from '@imagescript/codecs';

const rgba = new Uint32Array(256 * 256);
const image = png.encode(rgba, { width: 256, height: 256 });

you can force usage of wasm by setting CODECS_FORCE_WASM env variable

for deno and browsers use @imagescript/codecs/wasm/bundle/browser.js cdn

image used for benchmarks: new framebuffer(width, height).fill((x, y) => x * y)

MIT © evan matmen