Oleg Kobchenko wrote:
> Why diffent OpenGL library? Which one?

The "OS" in libOSMesa stands for "Off Screen".  The default
implementation of opengl for linux is /usr/lib/libGL.so.  This 
might be a pure software renderer, or it might be compiled to 
support the hardware rendering features of some specific card.

Also, a person might have alternate opengl implementations
installed under some other name.  The /usr/lib/libOSMesa.so
example is a good example of an alternate name, but other
alternate names are also possible.

> The blting bottleneck is resolved by not blting,
> that is painting directly to the hardware.
> As I understand MESA by default paints to
> hardware, not off-screen buffer.

See also:

http://www.mesa3d.org/install.html

-- 
Raul
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