#include <QtWidgets>
#include <QtOpenGL/qgl.h>

class MyWidget : public QGraphicsView
{
public:
    MyWidget() : QGraphicsView()
    {
        QGraphicsScene *scene = new QGraphicsScene(this);
        scene->setItemIndexMethod(QGraphicsScene::NoIndex);
        scene->setSceneRect(0, 0, 400, 400);
        setScene(scene);

        QFont font("times", 30);

        QGraphicsTextItem *text1 = scene->addText(QString("This is a test."));
        text1->setFont(font);
        text1->setPos(0, 10);

        font.setPixelSize(99);

        QGraphicsTextItem *text2 = scene->addText(QString("This is a test."));
        text2->setFont(font);
        text2->setPos(0, 100);

        setRenderHints(QPainter::Antialiasing
                       | QPainter::SmoothPixmapTransform
                       | QPainter::TextAntialiasing);
        setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
    }

protected:
};

int main(int argc, char **argv)
{
    QApplication a(argc, argv);
    MyWidget w;
    w.show();
    return a.exec();
}