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[Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes w


From: Dan Sebald
Subject: [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers
Date: Wed, 11 May 2016 21:02:56 +0000 (UTC)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:42.0) Gecko/20100101 Firefox/42.0

Follow-up Comment #89, bug #44478 (project octave):

"It works fine for me when linked with Mesa libs (GL and OSMesa), but not when
linked with the nvida OpenGL lib."

Do you think the issue is simply that OSMesa only works well with Mesa GL
because Mesa GL has knowledge of OSMesa's operation somehow?  Something that
another library (in this case nVidia) can't know about?  If so, perhaps it is
futile trying to solve this through coding, but instead maybe get lucky during
the Octave config process to point to the proper Mesa GL library when linking,
if it is present rather than just -lGL.

There is the OpenGL extensions I mentioned the other day.  (But that may be
limited to nVidia).  Any other approach available?

https://www.opengl.org/discussion_boards/showthread.php/165359-Offscreen-rendering

http://stackoverflow.com/questions/12157646/how-to-render-offscreen-on-opengl

It seems to me the "figure visible off" should have a work-around because
there otherwise is a functioning OpenGL window environment.  But in the case
of generating documentation, I'm assuming folks want to use open GL and no
external OpenGL windowing.

How about some version of Octave octave-os (off-screen) that doesn't link in
-lGL but links in -lOSMesa that can be used for documentation generation?


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