[Openicc] Xorg low level buffers - colour conversion

[Graeme Gill]

Tomas Carnecky wrote:

> For the color conversion with shaders, your limiting factor will be the 
> pixel fillrate. It's currently in the order of 1-15 Gigapixels per 

Hmm. I would have thought it would be limited by the 3D texture lookup
rate, which may be a lot slower, since 8 texture value need to
be looked up and interpolated for each pixel. If there's texture
caching involved, and the 3D lookups are big enough, then the
cache hit rate may have an impact as well.

Graeme Gill.