Pixelated QwtPlotTextLabel and QwtPlotRenderer

[Uwe]

How can you tell if the QPainter is scaling when QPainter::transform().isScaling() always return false.

Then the painter is not scaling - but when you don't have a painter transformation, what is the reason of the "pixelation". Could you make a small compilable demo showing the issue ?

Uwe

PS: One thing I can see is that the pixmap cache should be created by QwtPainter::backingStore() for the Retina displays on the Mac. But this shouldn't be of importance for your situation.