[Webkit-unassigned] [Bug 44926] New: Multiple accelerated 2D canvases should be able to use the same GraphicsContext3D

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=44926

           Summary: Multiple accelerated 2D canvases should be able to use
                    the same GraphicsContext3D
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jamesr at chromium.org
                CC: fishd at chromium.org, cmarrin at apple.com,
                    senorblanco at chromium.org, kbr at google.com


It's wasteful to create a new GraphicsContext3D for every 2d canvas since each GraphicsContext3D implies a potentially heavyweight backing OpenGL context.  Additionally having each canvas in its own GraphicsContext3D makes sharing resources between canvases very difficult, since there is no notion of resource sharing in the GraphicsContext3D APIs (although OpenGL has such a concept).  There are also a set of resources (shaders, etc) that we will want to use for every canvas.

Instead, we should share a single GraphicsContext3D across all 2d canvases that we wish to accelerate that exist in a single compositor context.

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