[krita] [Bug 454283] New: Implement 10 and 12-bit PQ and HLG for JPEG XL

[amyspark]

https://bugs.kde.org/show_bug.cgi?id=454283

            Bug ID: 454283
           Summary: Implement 10 and 12-bit PQ and HLG for JPEG XL
           Product: krita
           Version: git master (please specify the git hash!)
          Platform: Compiled Sources
                OS: macOS
            Status: REPORTED
          Severity: wishlist
          Priority: NOR
         Component: File formats
          Assignee: krita-bugs-null at kde.org
          Reporter: amy at amyspark.me
  Target Milestone: ---

SUMMARY
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Fredrick Odhiambo from Intel has asked if we support HDR JXLs, as libjxl itself
can't convert them to another format.
Wolthera had already commented that we should add this in the future, and it
seems the time has arrived...

> but basically, my approach with this has been to convert to linear upon import, as icc profiles don't support eotf-2084/PQ (or HLG for that matter), and I'd prefer to be honest with the user about that. Then for export I offer the option to convert to PQ or HLG.

STEPS TO REPRODUCE
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OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

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