[Webkit-unassigned] [Bug 179516] New: [CG] PDF document cached image is regenerated every time the destination rectangle changes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=179516

            Bug ID: 179516
           Summary: [CG] PDF document cached image is regenerated every
                    time the destination rectangle changes
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: PDF
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com

Open the attached test case. The image movement is not smooth as it should be.

The reason for this choppy animation is the PDF is drawn into a cached ImageBuffer every time it moves. Since the whole image is cached when it is drawn for the first time. It should not recached when the destination rectangle changes.

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