[Webkit-unassigned] [Bug 235758] New: [GPU Process] Move ImageBuffer::createCompatibleImageBuffer() to GraphicsContext

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=235758

            Bug ID: 235758
           Summary: [GPU Process] Move
                    ImageBuffer::createCompatibleImageBuffer() to
                    GraphicsContext
           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

GraphicsContext::createCompatibleImageBuffer() will be able to create an ImageBuffer similar to the underlaying ImageBuffer of the GraphicsContext. RecorderImpl and RemoteDisplayListRecorderProxy are superclasses of GraphicsContext, so they can override this method and return the desired type of ImageBuffer.

The goal is to replace all the create() of all the intermediate ImageBuffers by createCompatibleImageBuffer(). So they can be from the same type as the type of the ImageBuffer that they are going to be drawn to eventually. RenderingPurpose should only be used for the top-level ImageBuffers.

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