[Bug 73602] New: Mirrored EXIF rotations are not applied to thumbnails

https://bugzilla.wikimedia.org/show_bug.cgi?id=73602

            Bug ID: 73602
           Summary: Mirrored EXIF rotations are not applied to thumbnails
           Product: MediaWiki
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: trivial
          Priority: Unprioritized
         Component: File management
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected], [email protected],
                    [email protected], [email protected],
                    [email protected], [email protected]
            Blocks: 31504
       Web browser: ---
   Mobile Platform: ---

EXIF allows 8 possible values for the Orientation field: 0°, 90°, 180°, 270°,
and the same four for the mirror image of the original. The last four are not
used often, but are supported to some degree by the browsers. (See
http://www.daveperrett.com/articles/2012/07/28/exif-orientation-handling-is-a-ghetto/
for an overview of support.)

MediaWiki ignores mirrored rotations when generating thumbnails - the EXIF
information is stripped, and the physical orientation is left unchanged. See
[[commons:File:EXIF rotation 90 mirrored.jpg]] for an example (depending on the
browser, you might need to open the image directly to see the correct position,
or you might not see it at all - Chrome positions it correctly when viewed
directly but not when viewed on a page).

Obviously this is Priority: No One Cares but filing it anyway for the sake of
completeness.

-- 
You are receiving this mail because:
You are the assignee for the bug.
You are on the CC list for the bug.
_______________________________________________
Wikibugs-l mailing list
[email protected]
https://lists.wikimedia.org/mailman/listinfo/wikibugs-l