QDeclarativeView animation stops in release build



  • I created a small application which just shows a spinning icon. I've created this animation in QML.

    This is what my application looks like:
    @
    MainWindow::MainWindow(QWidget parent)
    : QMainWindow(parent)
    {
    setFixedSize(600,440);
    QWidget
    poWidget = new QWidget();
    QVBoxLayout* poLayout = new QVBoxLayout();

    QDeclarativeView* view = new QDeclarativeView();
    view->setSource(QUrl("qrc:/img/SpinningIcon.qml"));
    view->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
    
    poLayout->addWidget(view);
    poWidget->setLayout(poLayout);
    setCentralWidget(poWidget);
    

    }
    @

    @
    int main(int argc, char *argv[])
    {
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
    }
    @

    If I run it in debug mode on the Blaze with Windows EC7, everything works fine. If I try to run it in release mode, it stops spinning after a while and the CPU load goes up to nearly 100 %. (before it stops, the CPU load is around 20 %)

    Does anybody have an idea what the problem could be?
    Thank you in advance!



  • It works when I change the settings of the QtGui project.
    When C/C++ - Optimization - Disabled is set, everything works fine.

    The other problem is that the cpu load of the release build is a lot higher than the debug build when I embed QML in C++. Without QML the cpu load is a lot lower in debug mode.

    Does anybody have an explanation for this?



  • I found out that it is enough to only change the optimization settings of qblendfunctions.cpp

    But I still do not have an explanation for that :(


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