[Octave-bug-tracker] [bug #63748] Qt graphics toolkit cannot create OpenGL rendering context

[Markus Mützel]

Follow-up Comment #12, bug #63748 (project octave):

@Anonymous from comment #11: Afaics, the only (maybe) essential difference
between Octave's implementation and your example code is that Octave doesn't
call `QOpenGLContext::setFormat` before `QOpenGLContext::create`. Reading the
documentation for that function, I'd understand that calling it is optional
(and sensible defaults are used):
https://doc.qt.io/qt-6/qopenglcontext.html#setFormat

> When the format is not explicitly set via this function, the format returned
by QSurfaceFormat::defaultFormat() will be used.

Is that correct? Do you think that (for some graphics driver vendors?) it is
mandatory to explicitly set some format? Which format would that be?



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