Image manipulation in Qt console app segfaults?



  • Hi all,

    Can someone tell me why the following creates a segfault?
    It does so at the drawText line.

    @
    int main(int argc, char *argv[])
    {
    QApplication app(argc, argv, QApplication::Tty);

    QImage img(800, 800, QImage::Format_RGB16);
    QPainter painter(&img);
    
    QFont font("utsaah", 50, QFont::Bold, true);
    painter.setPen(QPen(Qt::white));
    painter.setFont(font);
    
    painter.drawText(0,0, 200,200, Qt::AlignLeft, "blah");
    
    return 0;
    

    }
    @

    Is there any way i can make this work without it needing to become a Qt GUI app?

    Thanks in advance.



  • Hi,

    what do you mean by "... become a Qt GUI app" or a "... Qt console app"? When you create Qt Console project with the QtCreator your pro-file has a

    @QT -= gui@

    in which case the code given does not compile, because QApplication, QPainter and QImage are not available.

    So, do you want to avoid creating a QWidget of any kind? That should be no problem. In fact, when commenting the above line

    @#QT -= gui@

    I can compile your code and execute it without any problems.

    Best Soraltan



  • I should mention this is qt-embedded.

    It segfaults if i use:
    @
    QApplication app(argc, argv, QApplication::Tty);
    @

    But if i use this it works fine (but i dont want the extra weight of the QWS/GUI).
    @
    QApplication app(argc, argv);
    @



  • Then I'm out, sorry. Not worked with Qt-embedded yet.


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