feature: add libjpeg-turbo and enable JPEG codec in libtiff/GDAL#57
Merged
bugra9 merged 2 commits intobugra9:mainfrom Apr 30, 2026
Merged
feature: add libjpeg-turbo and enable JPEG codec in libtiff/GDAL#57bugra9 merged 2 commits intobugra9:mainfrom
bugra9 merged 2 commits intobugra9:mainfrom
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Build libjpeg-turbo 3.1.4.1 statically with emscripten as the
@cpp.js/package-jpegturbo (and -wasm) workspace package, then
wire it into libtiff via -Djpeg=ON + JPEG_INCLUDE_DIR /
JPEG_LIBRARY, and into GDAL via -DGDAL_USE_JPEG=ON +
JPEG_INCLUDE_DIR / JPEG_LIBRARY_RELEASE.
This lets libtiff's JPEG codec resolve at runtime, so GeoTIFFs
with Compression=JPEG decode correctly instead of failing with
"Cannot open TIFF file due to missing codec JPEG".
Verification: libtiff.a contains tif_jpeg.c.o, tif_jpeg_12.c.o,
and tif_ojpeg.c.o (JPEG codec compiled in). GDAL wasm builds
successfully with the JPEG driver active.
Changes (19 files, +275/-6):
- New packages under cppjs-packages/cppjs-package-jpegturbo/
(version 2.0.0-beta.12, nativeVersion 3.1.4.1):
* meta sub-package: package.json, cppjs.config.js, README.md,
CHANGELOG.md, LICENSE, .npmignore
* -wasm sub-package: package.json, cppjs.config.js, cppjs.build.js
- root package.json: include @cpp.js/package-jpegturbo in
scripts.build:packages before tiff (preserves dependency order).
- cppjs-package-tiff-wasm:
* cppjs.build.js: add -Djpeg=ON, JPEG_INCLUDE_DIR, JPEG_LIBRARY
* cppjs.config.js: add jpegturboWasm to dependencies
* package.json: add @cpp.js/package-jpegturbo-wasm workspace dep
- cppjs-package-geotiff-wasm:
* cppjs.build.js: minor adjustment for jpeg path forwarding
* cppjs.config.js: add jpegturboWasm to dependencies
(libgeotiff itself does not call libjpeg, but configure's
link test against libtiff requires the jpeg path on wasm)
* package.json: add @cpp.js/package-jpegturbo-wasm workspace dep
- cppjs-package-gdal-wasm:
* cppjs.build.js: add -DGDAL_USE_JPEG=ON, JPEG_INCLUDE_DIR,
JPEG_LIBRARY_RELEASE
* cppjs.config.js: add jpegturboWasm to dependencies
* package.json: add @cpp.js/package-jpegturbo-wasm workspace dep
libjpeg-turbo cmake flags:
-DENABLE_SHARED=OFF -DENABLE_STATIC=ON -DWITH_TURBOJPEG=OFF
WITH_TURBOJPEG=OFF: GDAL only uses the standard libjpeg API,
so the TurboJPEG wrapper (libturbojpeg.a) would be dead code in
the final wasm — skipping it saves build time and intermediate
output size.
WITH_SIMD is left at cmake default. libjpeg-turbo's cmake
auto-disables SIMD on wasm32 since no hand-written backend
exists for that target. If upstream adds a wasm32 SIMD backend
later, this build will pick it up automatically.
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Build libjpeg-turbo 3.1.4.1 statically with emscripten as the @cpp.js/package-jpegturbo (and -wasm) workspace package, then wire it into libtiff via -Djpeg=ON + JPEG_INCLUDE_DIR / JPEG_LIBRARY, and into GDAL via -DGDAL_USE_JPEG=ON + JPEG_INCLUDE_DIR / JPEG_LIBRARY_RELEASE.
This lets libtiff's JPEG codec resolve at runtime, so GeoTIFFs with Compression=JPEG decode correctly instead of failing with "Cannot open TIFF file due to missing codec JPEG".
Notes:
cppjs-package-jpegturbo-wasm) are defined with
private: truefor now. Please flip them to publishable when ready.
as I don't have a test environment for those platforms.