[Interest] QOpenGLWidget mess up with app layout/pixel ratio on Retina screens

[Pavel Mogilevskiy]

Hi,

         I would like to raise one pretty old thread about QOpenGLWidget 
usage on Mac on Retina screens.
For some reasons, QOpenGLWidget mess up with app layout/pixel ratio on 
Retina screens. It's very easy to reproduce on hellogl example.
I found one bug report (https://bugreports.qt.io/browse/QTBUG-41767) 
which is related to this issue but reproducible in VMWare environment.
I've updated corresponding bug report with new details (see last comment 
in the thread).

     As workaround I tried to set 
QT_MAC_WANTS_BEST_RESOLUTION_OPENGL_SURFACE=0. It partially works but UI 
controls look blurry.

     I'm using Qt 5.12.3, MacBook Pro 13"., MacBook Air, 13".

     Related thread: https://bugreports.qt.io/browse/QTCREATORBUG-15906

     Any thoughts about this issue?

     Thanks!
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