QString testText = "test1";

    int id = QFontDatabase::addApplicationFont(":/fonts/code128.ttf"); 
    QString family = QFontDatabase::applicationFontFamilies(id).at(0); 
    QFont font(family);  
    font.setPixelSize(30);

    QStaticText testStaticText;
    testStaticText.setText(testText);
    QTransform  transform;
    testStaticText.prepare(transform,font);

    QPrinter printer;

    QPainter painter;
    painter.begin(&printer);
    painter.drawStaticText(0, 0, testStaticText);
    painter.end();