[compiz] free from GLX_EXT_texture_from_pixmap

[Ioannis Nousias]

You might have hear this before. I just came across it today.

from http://blog.beryl-project.org/

"I am running your svn and have noticed this non-tfp Beryl, what is this?

It is exactly what it sounds like, an early attempt (with some success I 
might add) to make Beryl run without the need for texture_from_pixmap. 
No more black window bug from nvidia, no more Xgl, no more AIGLX. Oh 
yeah… and its faster than Xgl/AIGLX (nvidia beta performance looks to be 
about the same). The code is all thanks to Onestone who is a true bling 
hero, and the idea itself originates from the Project Looking Glass 
people. Kudos to them and their great work, we hope to incorporate more 
of their experience to Beryl’s code base in the form of optimizations 
and improvements."

it seems to be still in it's infancy though. Even if it's not as 
good/fast as the GLX extension, it's still nice to have an alternative 
path in case the extension is not available.

-Ioannis