Third-party software in /heif
=============================

libheif.wasm and libheif.mjs are libheif 1.23 compiled to WebAssembly with Emscripten, as
published in the npm package libheif-js 1.23.5. Dokfo uses them unmodified, except for two
added lines in libheif.mjs (a comment pointing to this file and "export default libheif;").
They run only in the visitor's browser, to open HEIC/HEIF photos (for example from iPhones)
in the image tools. They are loaded as separate files from /heif, so they can be replaced
with another build of the same library.

They contain:
  1. libheif: GNU Lesser General Public License v3 (LGPL-3.0)
  2. libde265 1.0.15 (HEVC decoder used by libheif): GNU Lesser General Public License v3
     (LGPL-3.0)
  3. Emscripten runtime (the JavaScript loader): MIT License / University of
     Illinois/NCSA Open Source License

Source code:
  libheif-js:  https://github.com/catdad-experiments/libheif-js (version 1.23.5)
  build:       https://github.com/catdad-experiments/libheif-emscripten
  libheif:     https://github.com/strukturag/libheif
  libde265:    https://github.com/strukturag/libde265

Licence texts:
  LICENSE.txt in this folder is the licence file shipped with libheif-js. It contains the
  full GNU LGPL v3 and the MIT License that libheif's sample applications use.
  The GNU GPL v3, which the LGPL v3 builds on: https://www.gnu.org/licenses/gpl-3.0.txt
  Emscripten licence: https://github.com/emscripten-core/emscripten/blob/main/LICENSE