[Webkit-unassigned] [Bug 33514] New: [Qt] Implement GraphicsLayer for accelerated layer compositing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=33514

           Summary: [Qt] Implement GraphicsLayer for accelerated layer
                    compositing
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Qt
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: noam.rosenthal at nokia.com


Webkit contains an abstraction that allows platform-specific acceleration of
CSS opacity and transform animations. This abstraction, however, is not
implemented in QtWebkit.

I've created a WIP repo. on Gitorious where this is implemented nearly to the
full extent using QGraphicsItems - it needs a lot of testing but already works
pretty well with the LayoutTests from the repo.

Tracking on the QtWebkit side:
see http://bugreports.qt.nokia.com/browse/QTWEBKIT-15

WIP: 
http://gitorious.org/~noamr/webkit/noamrs-webkit/commits/accel
- [path-to-]/QGVLauncher http://webkit.org/blog-files/leaves/ --accel
-graphicssystem raster

Note: This might share some commonalities with what's needed for webkit tiling,
such as painting the contents and the scrollbar separately.

Right now I could use more eyes to look at the code to find architectural
issues, before I go to heavy debugging mode.
Note that right now it can only work with QGraphicsWebView and not with
QWebView: mainly because for implementing it with QWebView I'd need my own
QGraphicsScene rendering inside QWebView, and I'm not sure performance would be
that great.

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