Help required: Getting primary illuminants and white point from ICC file

[Richard Hughes]

2009/12/2 Graeme Gill <graeme2 at argyllcms.com>:
> For a cLut based profile, you would have to (as Lars Tore Gustavsen
> suggested) run the primary values through the profile (or
> do the equivalent of looking up what the cLUT values are at
> the primaries).

I'm sort-of stuck here. I'm confused about which cLUT I should be
using (TRC curves?), as different profiles are doing very different
things. Could you please elaborate about how to run the primaries
through the table? Thanks.

Richard.