Short description

I'm experiencing an issue with blurry scatter plots on high DPI monitors. The plots look fine on a HD screen, but with a resolution of 2560x1440 and the monitor scaling set to 125% in the Windows settings, the single points have blurry outlines.

Code to reproduce

The following code makes two windows, one with pxMode=True and the other with pxMode=False and antialias=False.

import pyqtgraph as pg

plotWidget = pg.plot()
plotWidget.setBackground('w')
scatter = pg.ScatterPlotItem(size=10, symbol='o', pen=None, brush=pg.mkBrush((0,115,190)))
x = [1,2,3,4,5,6,7,8,9,10]
y = [5,4,3,2,1,6,7,8,9,10]
scatter.addPoints(x, y)
plotWidget.addItem(scatter)

plotWidget = pg.plot()
plotWidget.setBackground('w')
scatter = pg.ScatterPlotItem(size=0.5, pxMode=False, antialias=False, symbol='o', pen=None, brush=pg.mkBrush((0,115,190)))
scatter.addPoints(x, y)
plotWidget.addItem(scatter)

The image to the right is with pxMode=False and does not have blurry points. However, I want to have the points properly scaled, which is not possible with pxMode=False (as far as I know). I suspect that the blurriness originates from antialiasing, which cannot be turned off when pxMode=True.

Any ideas?

Tested environment(s)

• PyQtGraph version: 0.13.3
• Qt Python binding: PySide6 6.6.0 Qt 6.6.0
• Python version: 3.11.4
• NumPy version: 1.25.2
• Operating system: Windows 10