[Webkit-unassigned] [Bug 217550] New: [GPU Process]: Replace "ImageBufferIdentifier" by a generic identifier named "RemoteResourceIdentifier"

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Oct 9 18:34:36 PDT 2020


https://bugs.webkit.org/show_bug.cgi?id=217550

            Bug ID: 217550
           Summary: [GPU Process]: Replace "ImageBufferIdentifier" by a
                    generic identifier named "RemoteResourceIdentifier"
           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

GPU Process needs to manage all the drawing resources and the drawing buffers/layers the same way. For example an HTMLCanvasElement is backed by a drawing buffer called ImageBuffer. All the drawing to the context of this HTMLCanvasElement is supposed to be done in this ImageBuffer. But at the same time this HTMLCanvasElement can be treated as a drawing resources when it is drawn to another HTMLCanvasElement through the method drawImage().

So RemoteResourceIdentifier will be the identifier of the ImageBuffer when drawing is happening to its context in the GPU process. And it will be the identifier of the image which will be drawn to anther buffer or layer in the GPU Process. The goal is to avoid copying the image from Web Process to GPU Process and use RemoteResourceIdentifier instead.

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