[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
https://bugs.webkit.org/show_bug.cgi?id=76274
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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