[Webkit-unassigned] [Bug 171634] New: Add a new argument to TestRunner.display() to control whether track repaints are required or not

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=171634

            Bug ID: 171634
           Summary: Add a new argument to TestRunner.display() to control
                    whether track repaints are required or not
           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

TestRunner.display() needs to have the option to draw the web page without drawing a gray background for the track repaints. A new argument will be added to this function to provide this option but it is optional. If it is not passed, it will behave as it was before the change so the existing tests won't break.

The purpose of this change is to make it easy to test the async image decoding. To draw an image asynchronously, TestRunner.display() will be called to start the image decoding. When the image frame is ready, we are going to call TestRunner.notifyDone() which will call TestRunner.display() a second time. This time, the image will be drawn without any further decoding.

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