quering offscreen rendering

[JuanPi]

Hi all,

I am using Nvidia drivers so when the current figure is in 'visible'
'off' I cannot produce images:

error: __osmesa_print__: support for offscreen rendering was disabled
when Octave was built

I was wonderig if this can be checked in .otaverc in a elegant way,
besides the obvious
try
  plot(0,1);
  set(gcf,'visible','off')
  print('-dpng', '/tmp/eraseme.png')
catch
  # do something
end

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JuanPi Carbajal
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