[cairo] Cairo, XRender, OpenGL, Glitz, confusion

[Pressebüro Martin Möller]

Hi all,

I'm trying to understand how all these elements: cairo, glitz, xrender,
opengl work together or depend on each other:

>From a little reading, I understand it like this:

Cairo is based on Glitz which is based on OpenGL which uses Xrender for
talking to the graphics hardware.

I this correct? I need a little clarification! :-D 
Thanks!
m. 
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