[Webkit-unassigned] [Bug 66650] New: Flash in a QGraphicsWebView using OpenGL is slow

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=66650

           Summary: Flash in a QGraphicsWebView using OpenGL is slow
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Plug-ins
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: tiftof at gmail.com


When showing a flash using a QGraphicsWebView in a QGraphicsScene that is rendered by a QGraphicsView using a QGLWidget, is slower than when not using a QGlWidget as viewport for the QGraphicsView.

The problem is in WebCore/plugins/qt/PluginViewQt.cpp. The plugin is being drawn on a X11Pixmap when the paint() method is called. In my case the supplied painter uses the OpenGL drawing engine. Calling the drawpixmap() method of this painting engine while using the X11Pixmap as the source pixmap will cause the X11Pixmap to be converted to an image by calling the QPixmap::toImage() method for every update of the plugin.

Letting the plugin draw on a normal QPixmap instead of a X11Pixmap when the painter is using the OpenGL engine will avoid this costly conversion for every update.

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