@dusrel/image-jxl

JPEG XL codec (libjxl v0.11.2, WASM, lazy-loaded). Separate encode/decode entries; the WASM is never bundled into any other package.

EXPERIMENTAL: browser JPEG XL decode support is still limited; use only where you control the viewing environment. This package exists so your app can produce and read JXL regardless of native browser support.

import { encode, decode } from "@dusrel/image-jxl";

const bytes = await encode(imageData, { quality: 85, effort: 7 });
const lossless = await encode(imageData, { lossless: true });
const pixels = await decode(bytes); // ImageData

Options: quality 0..100 (default 85, mapped to a butteraugli distance by libjxl's own JxlEncoderDistanceFromQuality), lossless (default false), effort 1..10 (default 7). Encoding is sRGB-in/sRGB-out (uses_original_profile — required by libjxl for lossless). Output is a bare JXL codestream (FF 0A signature).

Single-threaded by construction (ADR-0006): the glue sets libjxl's NULL parallel runner, so no SharedArrayBuffer and no COOP/COEP headers are ever required.

Artifact sizes (built by the wasm-build workflow from native/jxl, functionally smoke-gated in Docker and re-verified locally before commit): encoder 2,404,041 B, decoder 905,079 B.

Engine licence: BSD 3-Clause (bundled brotli BSD 3-Clause, highway Apache-2.0, skcms BSD-style) — see THIRD_PARTY_LICENSES.md.