[Webkit-unassigned] [Bug 76274] New: [chromium] Refactor canvas, plugin, and video drawing to be more data-driven

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Jan 13 06:43:24 PST 2012


           Summary: [chromium] Refactor canvas, plugin, and video drawing
                    to be more data-driven
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: tdresser at chromium.org

>From https://bugs.webkit.org/show_bug.cgi?id=73059:

CCLayerImpl-derived classes all currently handle drawing themselves internally, making direct GL calls.  This is problematic for several reasons.  Testing these layers is tricky because testing must be done at a mock GL interface level rather than at a higher abstract level.  It makes culling closely dependent on how each layer draws.  It also makes some optimizations like layer squashing impossible.

To fix this, CCLayerImpl-derived classes should produce a set of quads to render with some basic information in them about how they are to be drawn.  This list can then be processed and drawn in a more data-driven and abstract manner.

There are three CCLayerImpl-derived classes which still handle drawing internally: CCCanvasLayerImpl, CCVideoLayerImpl, and CCPluginLayerImpl. These should use the data-driven approach.

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