v3.1.11.0

Release 3.1.11.0 (Mar 1, 2026) -- compared to 3.1.10.0

• oiiotool: Fix expression BOTTOM when there are exactly two images #5046
• oiiotool: -d SUBIMAGENAME.* didn't work properly #5048
• oiiotool: Make sure oiiotool --compression does expression substitution #5055
• iv: Ability to flip, rotate and save image #5003 (by Valery Angelique)
• fix: Gamma precision #5038 (by Lumina Wang)
• bmp: Detect corrupt files where palette doesn't match bpp #5030
• heif: Monochrome channel read and write support, fix crash #5043 (by Brecht Van Lommel)
• jpeg-xl / color mgmt: Extending JXL CICP support to include P3 / color primaries 12 #5054 (by Shane Smith)
• tiff: Fix TIFF output crash for multi-count Exif metadata #5035
• tiff: Improve TIFF robustness for non-matching tag/metadata types #5036
• tiff: Correctly read TIFF EXIF fields for ExifVersion and FlashPixVersion #5045
• typedesc.h: New TypeURational type definition is like TypeRational, but with unsigned components. #5036 #5057
• win: oiiotool --buildinfo misreported platform on MSVS #5027
• build: Raise fmt auto-build version to 12.1, handle Windows flags #5039
• build: Self-builder logic fixes for deep vs shallow clones #5034
• build: Use quote to avoid error if variable is empty #5053
• tests: Add testsuite/heif ref output for libheif 1.21 + avif support #5031
• tests: Adjust test comparision thresholds for Mac ARM #5026
• tests: Imageinout_test: add benchmark of read and write speed vs tile size #5037
• ci: Don't install OpenCV on Mac Intel job variant #5032
• ci: Temporarily disable python stub checking #5061
• ci: Add MacOS 26 (ARM) to the CI lineup #5059

v3.0.16.0

Release 3.0.16.0 (Mar 1, 2026) -- compared to 3.0.15.0

• oiiotool: Fix expression BOTTOM when there are exactly two images #5046
• bmp: Detect corrupt files where palette doesn't match bpp #5030
• tiff: Fix TIFF output crash for multi-count Exif metadata #5035
• windows: oiiotool --buildinfo misreported platform on MSVS #5027
• build: Raise fmt auto-build version to 12.1, handle Windows flags #5039
• ci: Optimize install_homebrew_deps by coalescing installs #4975
• ci: Don't install OpenCV on Mac Intel job variant #5032
• ci: Temporarily disable python stub checking #5061
• ci: Add MacOS 26 (ARM) to the CI lineup #5059
• tests: Add testsuite/heif ref output for libheif 1.21 + avif support #5031
• tests: Adjust test comparision thresholds for Mac ARM #5026

v3.1.10.0

Release 3.1.10.0 (Feb 1, 2026) -- compared to 3.1.9.0

• perf: IBA::resample() and oiiotool --resample improvements to speed up 20x or more #4993
• ImageBuf: IB::localpixels_as_[writable_]byte_image_span #5011
• ImageBufAlgo*: IBA::make_texture now honors "maketx:threads" hint #5014
• heif: Add IOProxy for input and output #5017 (by Brecht Van Lommel)
• heif: Can not output AVIF when libheif has no HEVC support #5013 (by Brecht Van Lommel)
• heif: Error saving multiple images with different bit depths #5018 (by Brecht Van Lommel)
• webp: Use correct resolution limits for WebpOutput::open #5016 (by Jesse Yurkovich)
• webp: Missing oiio:UnassociatedAlpha on input #5020 (by Brecht Van Lommel)
• fix: Several bug fixes related to internal use of image_span #5004
• build: Fix building on OpenBSD #5001 (by Brad Smith)
• deps: Libheif 1.21 support #4992
• deps: Bump build ver to 2.5.1 #5022 (by Zach Lewis)
• deps: Use libheif exported config if available #5012
• tests: Add new ref image for jpeg test #5007
• tests: Fully disable tests when their required dependencies are missing #5005
• ci: Speed up macos15 intel variant by not installing Qt #4998
• ci: Don't run non-wheel workflows when only pyproject.toml changes #4997
• ci: Windows runners switched which python version they had #5010
• ci: Test against libraw 0.22 for 'latest' test variants #5009
• ci: Lock bleeding edge to pybind11 latest version #5024

v3.0.15.0

Release 3.0.15.0 (Feb 1, 2026) -- compared to 3.0.14.0

• heif: Can not output AVIF when libheif has no HEVC support #5013 (by Brecht Van Lommel)
• heif: Error saving multiple images with different bit depths #5018 (by Brecht Van Lommel)
• webp: Use correct resolution limits for WebpOutput::open #5016 (by Jesse Yurkovich)
• ci: Speed up macos15 intel variant by not installing Qt #4998
• ci: Windows runners switched which python version they had #5010
• ci: Lock bleeding edge to pybind11 latest version #5024

v3.1.9.0

Release 3.1.9.0 (Jan 1, 2026) -- compared to 3.1.8.0

• Color management improvements:
  • Auto convert between oiio:ColorSpace and CICP attributes in I/O #4964 (by Brecht Van Lommel)
  • exr: Write OpenEXR colorInteropID metadata based on oiio:ColorSpace #4967 (by Brecht Van Lommel)
  • jpeg-xl: CICP read and write support for JPEG-XL #4968 (by Brecht Van Lommel)
  • jpeg-xl: ICC read and write for JPEG-XL files (issue 4649) #4905 (by shanesmith-dwa)
• png: We were not correctly suppressing hint metadata #4983
• sgi: Implement RLE encoding support for output #4990 (by Jesse Yurkovich)
• webp: Allow out-of-order scanlines when writing webp #4973 (by Pavan Madduri)
• fix/IBA: IBA::compare_Yee() accessed the wrong channel #4976 (by Pavan Madduri)
• perf/filesystem.h: Speedup to detect the existence of files on Windows #4977 (by JacksonSun-adsk)
• ci: Address tight disk space on GHA runners #4974
• ci: Optimize install_homebrew_deps by coalescing installs #4975
• ci: Build_Ptex.bash should build Ptex using C++17 #4978
• ci: Unbreak CI by adjusting Ubuntu installs #4981
• ci: Test against libraw 0.21.5 #4988
• docs: Fix missing docs for OIIO:attribute() and OIIO::getattribute() #4987

v3.0.14.0

Release 3.0.14.0 (Jan 1, 2026) -- compared to 3.0.13.0

• fix: IBA::compare_Yee() accessed the wrong channel #4976 (by Pavan Madduri)
• ci: Test against libraw 0.21.5 #4988
• ci: Address tight disk space on GHA runners #4974

v3.1.8.0

Release 3.1.8.0 (Dec 1, 2025) -- compared to 3.1.7.0

• exif: Support EXIF 3.0 tags #4961
• jpeg: Fix wrong pointers/crashing when decodng CMYK jpeg files #4963
• openexr: Improve attribute translation rules #4946
• openexr: ACES container writes colorInteropId instead of colorInteropID #4966 (by Brecht Van Lommel)
• color mgmt: Fix some legacy 'Linear' color references #4959
• imagebuf: Fix ImageBuf::set_pixels() bug, didn't consider roi = All #4949
• tests: Image_span_test reduce benchmark load for debug and CI renders #4951
• build: Type warning in assertion in jpeg2000output.cpp #4952
• build: Disable LERC in libTIFF local build script #4957 (by LI JI)
• ci: Fix broken ci, debug and static cases, bump some latest #4954
• ci: Unbreak icc/icx CI #4958
• admin: Update some license notices #4955

v3.0.13.0

Release 3.0.13.0 (Dec 1, 2025) -- compared to 3.0.12.0

• exif: Support EXIF 3.0 tags #4961
• build: Disable LERC in libTIFF local build script #4957 (by LI JI)
• ci: Fix broken ci, debug and static cases, bump some latest #4954
• ci: Unbreak icc/icx CI #4958

v3.1.7.0

Release 3.1.7.0 (Nov 1, 2025) -- compared to 3.1.6.1

• openexr: Support for idManifest and deepImageState (experimental) #4877 (3.1.7.0)
• openexr: ACES Container hint for exr outputs #4907 (by Oktay Comu) (3.1.7.0)
• ffmpeg: 10 bit video had wrong green channel #4935 (by Brecht Van Lommel) (3.1.7.0)
• iff: Handle non-zero origin, protect against buffer overflows #4925 (3.1.7.0)
• jpeg-xl: Correctly set Quality for JPEG XL #4933 (3.1.7.0)
• api/docs: Fix IBA::set_pixels declaration and docs #4926 (3.1.7.0)
• win: Address Windows crashes from issue 4641 #4914 (3.1.7.0)
• fix: Uninitialized value revealed by clang-21 warning #4940 (3.1.7.0)
• build/deps: Additional auto-build capabilities for dependencies that are not found: GIF library #4921 (by Valery Angelique), OpenJPEG #4911 (by Danny Greenstein) (3.1.7.0)
• build: Allow auto-build of just required packages #4927 (3.1.7.0)
• build: Make dependency report more clear about what was required #4929 (3.1.7.0)
• ci: Python wheel building improvements: use ccache #4924 (by Larry Gritz), unbreak wheel release + other enhancements pt 1 #4937 (by Zach Lewis) (3.1.7.0)
• ci: Drop deprecated macos-13 (intel) platform, add macos-15-intel #4930 (3.1.7.0)
• ci: Try to avoid ffmpeg install failures #4936 (3.1.7.0)
• ci: Simplify ci workflow by using build-steps for old aswf containers, too #4932 (3.1.7.0)
• ci: We were not correctly setting fmt version from job options #4939 (3.1.7.0)
• tests: Update ref images for heif #4941 (3.1.7.0)
• docs: Update/correct explanation of "openexr:core" attribute, and typo fixes #4943 (3.1.7.0)

v3.0.12.0

Release 3.0.12.0 (Nov 1, 2025) -- compared to 3.0.11.0

• iff: Handle non-zero origin, protect against buffer overflows #4925
• jpeg-xl: Correctly set Quality for JPEG XL #4933
• win: Address Windows crashes from issue 4641 #4914
• fix: Uninitialized value revealed by clang-21 warning #4940
• ci: For python wheel generation, use ccache #4924
• ci: Drop deprecated macos-13 (intel) platform, add macos-15-intel #4930
• ci: We were not correctly setting fmt version from job options #4939