[Webkit-unassigned] [Bug 40130] New: [Qt] Rendering artifacts when scrolling with a fixed div having a box-shadow

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Jun 3 11:08:43 PDT 2010


https://bugs.webkit.org/show_bug.cgi?id=40130

           Summary: [Qt] Rendering artifacts when scrolling with a fixed
                    div having a box-shadow
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: S60 Hardware
        OS/Version: S60 3rd edition
            Status: UNCONFIRMED
          Severity: Major
          Priority: P3
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: juha.turunen at digia.com


Created an attachment (id=57790)
 --> (https://bugs.webkit.org/attachment.cgi?id=57790)
HTML for reproducing the bug 

After loading the attached HTML to a QWebView, the drawn shadow is 'left behind' when scrolling the page upwards. When scrolling down the shadow seems to disappear under the fixed position div. Tried this both on Symbian^3 HW and emulator with a quite new Qt 'unstable' release (please contact me by email if you need more specific details). The same HTML viewed with Anomaly (on the same HW) doesn't seem to suffer from this same problem. The app I used to reproduce the problem was this minimal one:

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

#if defined (Q_OS_SYMBIAN)
    qt_SetDefaultIap();
#endif

    QWebView view;
    QPalette pal = view.palette();
    pal.setBrush(QPalette::Window, Qt::white);
    pal.setBrush(QPalette::Base, Qt::white);
    pal.setBrush(QPalette::Background, Qt::white);
    view.setPalette(pal);

    QNetworkProxyFactory::setUseSystemConfiguration(true);
    view.load(QUrl("file:///C:/data/artifacts.html"));

    view.show();
    return a.exec();
}

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