[Webkit-unassigned] [Bug 19688] Add autodetection of image orientation from EXIF information

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=19688





--- Comment #65 from Eric Seidel <eric at webkit.org>  2011-05-26 14:51:48 PST ---
(In reply to comment #64)
> There's a fourth possibility:
> 4. Images with EXIF orientation that have been manually rotated to display correctly on the Web (or in a photo viewer that doesn't respect EXIF orientation, such as the Windows 7 built-in Photo Viewer), but the EXIF data was not updated (or was updated incorrectly) so now the EXIF orientation is incorrect.
> 
> (I just noticed that if you rotate the image in Windows Photo Viewer to have the correct orientation, it adds an EXIF tag with the correct orientation, but doesn't remove the original one! I wonder what kind of issues that triggers...)

Another way of writing what you're saying is that the image has EXIF data, and looks OK today, but that EXIF data is wrong.

The interblags seem upset about Windows Photo Viewer's current behavior:
http://answers.microsoft.com/en-us/windows/forum/windows_7-pictures/windows-photo-viewer-or-live-photo-gallery-does/a161c8da-c1ce-4347-a92e-724f9e535c15

I expect that images with wrong EXIF data will look wrong in all of the other photo viewers on other platforms like Gtk and Mac as well as the iPhones and Android devices that we're trying to match.

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