[Octave-bug-tracker] [bug #52260] Axes appear upside down with Qt5

[Markus Mützel]

URL:
  <http://savannah.gnu.org/bugs/?52260>

                 Summary: Axes appear upside down with Qt5
                 Project: GNU Octave
            Submitted by: mmuetzel
            Submitted on: Sat 21 Oct 2017 06:33:33 PM UTC
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

When compiling Octave with Qt5, the axes in figures appear upside down
on-screen for me. Printed figures do not exhibit the error. See file #42144
and file #42145 for the results I see for "demo light 1" on-screen and printed
out.
This only occurs with "graphics_toolkit qt". No upside down axes with
"graphics_toolkit fltk".
I also see no error when I am starting Octave with "LIBGL_ALWAYS_SOFTWARE=1
./run-octave".

I am using Ubuntu 17.10 on an x11 session using QtOpenGLWidget.




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