[Webkit-unassigned] [Bug 169529] New: REGRESSION (r213764): Async image decoding is disabled for animated images

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=169529

            Bug ID: 169529
           Summary: REGRESSION (r213764): Async image decoding is disabled
                    for animated images
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com

The change r213764 causes the animated images to be decoded synchronously because we were calling frameImageAtIndex() with an empty sizeForDrawing but with a valid subsamplingLevel. This call is translated to be synchronous image decoding. The fix is get the current image frame without any decoding. This is because are sure that in the case of animated image, the current image frame can not be deleted.

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