[GRASS-dev] [GRASS GIS] #3606: m.nviz.image produces a screenshot

[GRASS GIS]

#3606: m.nviz.image produces a screenshot
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  Reporter:  epifanio  |      Owner:  grass-dev@…
      Type:  defect    |     Status:  new
  Priority:  major     |  Milestone:
 Component:  Display   |    Version:  svn-trunk
Resolution:            |   Keywords:
       CPU:  x86-64    |   Platform:  Linux
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Comment (by hcho):

 If I remove line 480 in lib/ogsf/gsd_prim.c {{{glXSwapBuffers}}}, I'm
 getting a similar result. Nviz draws to the back buffer and OGSF copies
 the back buffer to the front before saving an image. You might be doing
 double swapping for some reason. Please try the following patch.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3606#comment:3>
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