[Octave-bug-tracker] [bug #53186] Without osmesa it is not possible to print/getframe invisible figures

[Pantxo Diribarne]

Follow-up Comment #5, bug #53186 (project octave):

@Rik: thanks for testing, it's very good news. Since Octave is always built
with Qt > 5.1 on Windows, this means we could drop this long standing goal of
having osmesa work. This also means that Octave documentation can be built
without osmesa support.

I'll rework the patch to take care of configure checks and all cases when a
figure is invisible:
* Qt >= 5.1 : print OK, getframe OK,
* Qt < 5.1 + osmesa: print OK, getframe OK,
* Qt < 5.1 + no osmesa: print ERROR unless the figure has been visible once,
getframe ERROR unless the figure has been visible once,
* FLTK + osmesa: print OK, getframe OK,
* FLTK + no osmesa: print ERROR, getframe ERROR.

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