[Octave-bug-tracker] [bug #44916] Printing Qt-drawn figures produces faulty files

[John Donoghue]

Follow-up Comment #56, bug #44916 (project octave):

Since we are now using software rendering for opengl in QT, is that the issue
with some reports of opengl running very slowly?

Since the reason it was used is that some opengl drivers appeared to cause
issues with figures, maybe we should add a command line option to allow
enable/disable of the opengl software rendering similar to matlab with the
-softwareopengl option [1]

On a side note, I had started writing a oct file that displays the opengl info
similar to the matlab opengl function (the info and data options) - maybe
usefully for helping identify what drivers are causing issues. 

Running it in windows 7 with octave 4.0.1-rc4:

>> opengl("info")
version  = 1.1.0
vendor   = Microsoft Corporation
renderer = GDI Generic
# of extensions = 3


[1] http://www.mathworks.com/help/matlab/ref/opengl.html




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