[Bf-committers] debugging OpenGL/VBO's

[Lukas Steiblys]

Awesome, I was looking for something like that. Does it work on Windows?
Nvidia seems to have some decent OpenGL tools like GLExpert, but I never 
managed to make them work.

Lukas Steiblys
http://imbusy.org
----- Original Message ----- 
From: "Campbell Barton" <ideasman42 at gmail.com>
To: "bf-blender developers" <bf-committers at blender.org>
Sent: Sunday, October 11, 2009 3:59 PM
Subject: [Bf-committers] debugging OpenGL/VBO's


> today I was looking into a VBO bug that have a totally useless
> backtrace in GDB. (crash inside the GL driver)
>
> Using bugle - http://www.opengl.org/sdk/tools/BuGLe/
> On Linux did the usual ./configure; make; make install
>
> Copy doc/examples/filters into ~/.bugle/filters
> BUGLE_CHAIN=validate LD_PRELOAD=/usr/local/lib/libbugle.so  /b/blender.bin
>
> Then instead of crashing it gives a useful message as to whats going
> wrong, like this...
> [NOTICE] checks.error: illegal normal array caught in glDrawArrays
> (unreadable memory); call will be ignored.
>
> there are other options for debugging like showfps, trace, wireframe
> ... see ~/.bugle/filters for options.
>
> With the "crash" filter I managed to get a valid backtrace from gdb too.
> BUGLE_CHAIN=crash LD_PRELOAD=/usr/local/lib/libbugle.so  gdb 
> /b/blender.bin
>
> - thought It might be useful for people looking into VBO bugs for the
> first time.
>
> -- 
> - Campbell
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