Windows print out to vector files results in bitmap for elements on top of transparent or gradient items

#include <QtPrintSupport>
#include <QtGui>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QPrinter p;
    QPrintDialog d(&p);
    if(d.exec()) {
        QPainter painter(&p);
        QFont f("Helvetica", 30);
        painter.setFont(f);
        painter.setPen(Qt::gray);

        painter.drawText(100, 50, "A simple line of text behind.");

        painter.fillRect(0,40,1200,70,QColor(100,0,0,50));

        painter.drawText(100, 120, "A simple line of text in front.");

        QLinearGradient linearGrad(QPointF(0, 0), QPointF(100, 100));
        linearGrad.setColorAt(0, Qt::black);
        linearGrad.setColorAt(1, Qt::white);
        linearGrad.setSpread(QGradient::RepeatSpread);

        painter.fillRect(0,300,1200,70,linearGrad);

        painter.drawText(100, 315, "A simple line of text on top of a gradient.");
    }
    return 0;
}