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INFRA-2457 Upgrade libheif to v1.23.7 - #76
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v1.23.7 is a security release with 14 high-severity fixes. Drops the DarthSim alpha patch, which no longer applies; libheif now converts a mismatched alpha bit depth itself (strukturag/libheif#1673). Removes the base image's libheif.so.1.23.6 so only this build is installed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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What this does
Builds libheif v1.23.7 instead of v1.21.2. v1.23.7 is a security release with 14 high-severity fixes (https://github.com/strukturag/libheif/releases/tag/v1.23.7). It still uses x265, and still links the base image's libde265 for 10-bit.
Drops the DarthSim patch. It no longer applies, and libheif now does the job itself: it converts an alpha plane with a different bit depth instead of erroring, and scales an alpha plane of a different size (strukturag/libheif#1673). DarthSim closed his upstream version of the patch in favour of that fix.
Removes the base image's own libheif.so.1.23.6. Before this the image had two libheifs and libheif.so.1 pointed at our older build.
How I tested it
Built natively on amd64. The image has one libheif, libheif.so.1.23.7, loading libde265 from /opt/imgproxy/lib.
Compared against the current release image (1a3fe0b):
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