What is the fastest way to draw a circle ?

[Vladimir]

QGLFormat::hasOpenGL()
QGLFormat::sampleBuffers()

Thanks !

You can speed up pixmap scaling by tweaking transformation modes from smooth to fast. You can improve quality by doing the opposite thing.

I still can't figure out how to do it. I can draw into QPixmap with antialiasing but the problem is that when I'm calling QPainter::drawPixmap (even without any transformations) the pixmap is always painted starting from some pixel on the screen, for example when position of the item is (15.4,19.7) it will still be drawn at position (15,20). When items are slowly moving it gives the impression that the movement is shaky.