[Webkit-unassigned] [Bug 284179] New: Move drawing the ImageBuffer from GraphicsContext to ImageBuffer and ImageBufferBackend

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=284179

            Bug ID: 284179
           Summary: Move drawing the ImageBuffer from GraphicsContext to
                    ImageBuffer and ImageBufferBackend
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

This is work towards snapshotting the remote iframes bug 282664.

The current drawing function GraphicsContext::drawImageBuffer() assumes all ImageBuffers have to be sunk  into NativeImage. We need to add an DisplayList ImageBufferBackend. To draw the container ImageBuffer we will need to replay back the display list of its backend. So GraphicsContext::drawImageBuffer() should direct the drawing to the ImageBuffer which will delegate it to its backend.

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