GSoC CM collaboration

[Graeme Gill]

Olivier Galibert wrote:
> So the special atoms are attached to _root_ windows only, and not
> windows in general.  And they obviously don't specify the profiles for
> only their own contents but for all the subwindows too.  Makes more
> sense.

In general there are two device profiles involved. One for the colorspace
of the display, and one for the colorspace of the pixels to be displayed.
Linking them results in the color transform from one to the other. So
if you want to manage color spaces on a per window basis, then there
would be something like a profile per window, as well as a profile per
display.

If a window overlaps several displays, then each part on each display
gets a different color transformation due to the window/display profile
combination.

Graeme Gill.