|| Specifies the function set to add.
function adds a function set to the color management system.
If the function set uses device-dependent
structures not accessible in the color management system,
If an added
structure is for a device-dependent color space not registered
with the X Consortium,
they should be treated as private to the client
because format values for unregistered color spaces are assigned at run time.
If references to an unregistered color space must be made outside the
client (for example, storing color specifications in a file
using the unregistered color space),
then reference should be made by color space prefix
Additional function sets should be added before any calls to other
Xlib routines are made.
If not, the
member of a previously created
does not have the opportunity to initialize
with the added function set.
"Adding Function Sets".
Christophe Tronche, firstname.lastname@example.org