[Webkit-unassigned] [Bug 174337] New: Bitmap should try to match asynchronously decoded frames for synchronous drawing if possible

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=174337

            Bug ID: 174337
           Summary: Bitmap should try to match asynchronously decoded
                    frames for synchronous drawing if possible
           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

Currently we assume if an image has been drawn asynchronously, it will never been drawn synchronously after that. The conditions, which controls synchronous versus asynchronous drawing, rely on the settings and the image size. These condition will include soon other things which change at runtime like, for example, an image will be drawn asynchronously only for the first time a tile is painted. But after that the image will be drawn synchronously. So we need to be more efficient and try to use the already decoded frames instead of decoding new ones unnecessarily.

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