Render-artefacts when rotating a QGraphicsWidget

[zweistein]

Hey,

i wrote my own text class, but it is rendered wrong:

!http://data.whosme.de/bug.png(bug.png)!

Where does those artefacts come from and how can i get it right? They only appear, when i rotate the text.
I am using a Graphicsscene and Graphicsview with OpenGL Viewport. This is my Text class:
@
class Text : public QGraphicsWidget
{
Q_OBJECT

public:
Text();
~Text();

void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *);
QString m_Text;
QColor m_Color;

signals:
void pressed();
};
@

@
Text::Text() : m_Color(QColor(255,255,255))
{
};

Text::~Text() {
};

void Text::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
{
painter->setPen( m_Color );
painter->drawText( boundingRect(), m_Text );
}
@

For the rotation i used m_InformationText.setRotation(-90);
Without the rotation it works fine!

[DerManu]

Does this happen with other fonts, too?

[zweistein]

Yes, changed the font in Text::paint with

QFont sansFont("Times", 11);
painter->setFont(sansFont);

Same Problem.

[zweistein]

Oh, and i have to say that this error is only here at my pc at home. At my working place it is working as it should.

[andre]

Perhaps an OpenGl driver issues? Do you also have the artifacts if you use the raster backend?

[zweistein]

It renders fine, when i use the raster renderer. But the raster renderer is a bit too slow for my application. My Animations started stuttering.

[zweistein]

I have just made a Driver update. from 285 to 301 on my NVidia 560 GTX. Still have those artefacts :(