Add Apple Log 2 built-in transform - #2343
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doug-walker merged 3 commits intoSep 15, 2026
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Apple Log 2 uses the same transfer function as Apple Log but encodes in the Apple Wide Gamut primaries rather than Rec.2020. Adds the APPLE_LOG-APPLEWG_to_ACES2065-1 built-in and its unit test values. Signed-off-by: Carol Payne <carol@wizard.inc> Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
doug-walker
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Looks good!
I verified the chromaticities are correct.
We need to update Config::Impl::checkVersionConsistency, but we could merge this first and I'll fix that in a follow-up, since it requires bumping the config version.
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Yeah sounds good, thanks Doug! I'll follow with the PR to the configs repo, too. |
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"Apple Log 2" uses the same transfer function as "Apple Log" but encodes in the "Apple Wide Gamut" primaries rather than "ITU-R BT.2020". The "Apple Log 2" "CLF" transform is built from the "APPLE_LOG-APPLEWG_to_ACES2065-1" "OpenColorIO" builtin transform added in AcademySoftwareFoundation/OpenColorIO#2343, so the generated config declares the builtin rather than an inline group transform. The style is gated to "OpenColorIO" 2.6, the release the builtin lands in. The "Apple Wide Gamut" primaries are not published with a matrix nor a chromatic adaptation transform, thus the "Linear Apple Wide Gamut" matrix is derived from the primaries using "Bradford" adaptation, as it is the most consistent with "ACES" and matches the builtin. Closes AcademySoftwareFoundation#163 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Signed-off-by: Carol Payne <carol@wizard.inc>
remia
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Sep 14, 2026
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@carolalynn, I'm unable to merge main into your branch (Allow edits from maintainers is off?). If you update you branch with main, I'll merge it. |
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Weird - done! |
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Apple Log 2 uses the same transfer function as Apple Log but encodes in the Apple Wide Gamut primaries rather than Rec.2020. Adds the APPLE_LOG-APPLEWG_to_ACES2065-1 built-in and its unit test values.
Assisted by: Claude / Opus 5