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

[Pantxo Diribarne]

Follow-up Comment #17, bug #63748 (project octave):

>> I think the original purpose of the m_os_context member variable was to
allow rendering to work when there was no visible graphics window.

Yes. If a figure has never been made visible, its corresponding QOpenGLWidget
cannot provide a valid OpenGL and Octave creates an offscreen rendering
context, namely m_os_context.    


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