[Webkit-unassigned] [Bug 30511] New: Rotating the QGraphicsWebView on google.com shows black areas around the images

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=30511

           Summary: Rotating the QGraphicsWebView on google.com shows
                    black areas around the images
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Qt
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: kenneth at webkit.org


This is only using the X11 backend, so it seems a Qt graphicsssystem X11
backend issue.

Outcommenting

155     if (!image->hasAlpha() && painter->compositionMode() ==
QPainter::CompositionMode_SourceOver)
156         painter->setCompositionMode(QPainter::CompositionMode_Source);

in ImageQt.cpp / BitmapImage::draw

Will make it work for X11, but that way we loose the optimization of using
Source (write) instead of SourceOver (read + write)

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