[Webkit-unassigned] [Bug 100191] New: [chromium] [meta] Add auto-detection of image orientation from EXIF information

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=100191

           Summary: [chromium] [meta] Add auto-detection of image
                    orientation from EXIF information
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
               URL: http://recursive-design.com/blog/2012/07/28/exif-orien
                    tation-handling-is-a-ghetto
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: noel.gordon at gmail.com


http://recursive-design.com/blog/2012/07/28/exif-orientation-handling-is-a-ghetto and I concur.

CG added EXIF support in bug 19688 for imageDocuments and for page <img> via the page WebKitShouldRespectImageOrientation setting.

We should add this EXIF support to the chromium port for imageDocument only, with the page setting to permit testing (leave the setting off-by-default) since auto-orientation of page <img> tags should be opt-in (author controlled) ...

[css3-images] Honoring EXIF orientation from images
  http://lists.w3.org/Archives/Public/www-style/2011Dec/0001.html
[css3-images] Processing model for transformations (image() vs. image-orientation)
  http://lists.w3.org/Archives/Public/www-style/2011Dec/0002.html
http://dev.w3.org/csswg/css4-images/#image-orientation
  img { image-orientation: from-image }

So in this bug, be aware of the CSS image-orientation work bug 89052 and how the platform code needs updating to examine an image renderer->style()->imageOrientation() at draw time, see bug 91566 and bug 92330, let's not break them.

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