iToolers IM10 HEIC to JPG: decoder notices, source and how to replace it WHAT IS DISTRIBUTED - libheif 1.23.2 (HEIF/HEIC container and image decoder framework), copyright struktur AG and contributors, LGPL-3.0-or-later. Upstream: https://github.com/strukturag/libheif (tag v1.23.2, commit ac1cb05c39008f01525c991ff8b88f84ddf70fd2). - libde265 1.0.15 (HEVC video decoder used for HEIC images), copyright struktur AG, LGPL-3.0-or-later. Upstream: https://github.com/strukturag/libde265 (release v1.0.15). - Both were compiled to WebAssembly with Emscripten by libheif-emscripten v1.23.2 (https://github.com/catdad-experiments/libheif-emscripten, uses libheif's own build-emscripten.sh without modification) and are packaged as the npm module libheif-js 1.23.2 (https://github.com/catdad-experiments/libheif-js, LGPL-3.0). No source code was changed by iToolers. FILES SERVED FROM THIS WEBSITE (same origin, never fetched from a third party) - /heic-assets/1.23.2/libheif.wasm 1,422,377 bytes sha256 e4aa8333fbe55ec7c6c776f735236f40bed9103188498f8131d4e52b73cdfee8 The compiled library, byte-for-byte as published in libheif-js 1.23.2 (libheif-wasm/libheif.wasm). - /heic-assets/1.23.2/libheif.mjs 91,608 bytes sha256 b23561aec874b360c6dac048516bb75e4e2226c6f21ebcec3deabe132f453b66 The upstream JavaScript loader libheif-wasm/libheif.js (91,255 bytes, sha256 f148d9ff173e5a6d6781e80dccb8336f54bfbb032392ceb2d37e0e92923c4bf3) with a 4-line CommonJS shim added above it and "export default libheif;" below it, because a module Web Worker cannot load a classic script. Rebuild it with: node scripts/heic-assets.mjs The library is loaded only when a HEIC photo needs it (browsers that decode HEIC natively, such as Safari, do not download it). Photo bytes are processed inside your browser and are not uploaded. CORRESPONDING SOURCE (LGPL-3.0 section 4) - /licenses/libheif-1.23.2-source.tar.gz sha256 1405ed070421459b569ff49deab109b7f1a30a447e72a9b20a4154f774634a44 Complete libheif 1.23.2 source, including build-emscripten.sh and the Emscripten glue post.js. - /licenses/libde265-1.0.15-source.tar.gz sha256 00251986c29d34d3af7117ed05874950c875dd9292d016be29d3b3762666511d Complete libde265 1.0.15 source release. - /licenses/libheif-emscripten-1.23.2-source.tar.gz sha256 1b1b71e8b34ccc2b9ba490d769172ad855c279efdc787d8ea7a901af177ebcab The build wrapper repository (tag v1.23.2) that pins the libheif revision. - libheif-js 1.23.2 (the npm wrapper that packages the two libraries): https://www.npmjs.com/package/libheif-js/v/1.23.2 and https://github.com/catdad-experiments/libheif-js/tree/1.23.2 . Its compiled files come from libheif-emscripten v1.23.2 above. HOW TO REPLACE THE LIBRARY The decoder is a separate file, /heic-assets//libheif.wasm, requested by the page at run time. To use a modified libheif: build it from the sources above with Emscripten (run build-emscripten.sh from libheif with the Emscripten SDK, as libheif-emscripten does), then put the result at the same versioned path in your own copy of the site. The site verifies the SHA-256 of that file before running it (src/engines/heic/assets.ts), so a rebuilt copy must also update the recorded hash. If you need the site's build files to relink against a modified library, write to itoolers@gmail.com and they will be provided. NO WARRANTY libheif and libde265 are provided as is, without warranty, under the licenses below. HEVC is a patent-encumbered codec; you are responsible for any patent licences your use requires. -------------------------------------------------------------------------------------------------- GNU LESSER GENERAL PUBLIC LICENSE, Version 3 (applies to libheif and libde265) The full text follows. 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