[Octave-bug-tracker] [bug #50317] warning 'invalid operation' when using zoom on Qt figure

[Rik]

Update of bug #50317 (project octave):

                  Status:                    None => Confirmed              

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Follow-up Comment #2:

The problem is happening somewhere other than in init_gl_context().  This
function actually checks for an OpenGl error, versus most functions which
don't, so it only appears to originate here.

I modified init_gl_context to: 


  void
  opengl_renderer::init_gl_context (bool enhanced, const Matrix& c)
  {
#if defined (HAVE_OPENGL)

    GLenum gl_error0 = glGetError ();
    if (gl_error0)
      warning ("0_Error: Error %s occurred in init_gl_context",
               gluErrorString (gl_error0));


and it is always this error that is triggered, not the downstream one at the
end of the function. 




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