windows hdpi support & opengl

Boudewijn Rempt boud at
Thu Apr 14 13:52:47 UTC 2016

I'm trying to make Krita work correctly on hi-dpi windows screens 
like the Surface Pro 3 and 4. On OSX with Retina support, I haven't
had complaints, but for Windows there's this bug:

If I enable


as is done in

Users complain that if they enable 150% or 200% display scaling both
the opengl-based and the cpu, qpainter-based canvas are wrong: the
image is also displayed at 150% or 200%.

This is the same image at 100% zoom with scaling:

when the option is disabled as in

All the ui elements are wrong and sometimes even the svg icons
aren't scaled correctly.

Is there a way I can enable the hidpi scaling for the ui elements,
but handle the opengl and qpainter canvas widget on my own? I'm
looking at which explains why
there's no problem on OSX, with the OpenGL canvas enabled, but not
how I can correctly render images on Windows.

Boudewijn Rempt |,

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