[Webkit-unassigned] [Bug 228308] New: [WinCairo] New GraphicsLayer for GPU process mode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=228308

            Bug ID: 228308
           Summary: [WinCairo] New GraphicsLayer for GPU process mode
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Compositing
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Hironori.Fujii at sony.com
                CC: simon.fraser at apple.com

[WinCairo] New GraphicsLayer for GPU process mode

In GPU process mode, WebGL is run in GPU process. So, the
compositor (TextureMapper) should be run in GPU process.
Otherwise, the output texutre of WebGL has to be transferred from
GPU process to the compositor process (UI process or web
process).

BTW, Mac port is using IOSurface, GTK and WPE ports plan to use
DMA to transfer the texture beyond the process boundary.
https://eleni.mutantstargoat.com/git/?p=webkit_codecamp;a=blob;f=codecamp.pdf
https://eleni.mutantstargoat.com/hikiko/angle-dma/

Coordinated Graphics has been significantly changed since
r212608 (Bug 168514) removed multi-process mode of Coordinated
Graphics.

I'm going to revive the architecture of the multi-process mode of
Coordinated Graphics.

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