x-compose-font-name

x-compose-font-name is a compiled Lisp function in `fontset.el'.

(x-compose-font-name FIELDS &optional REDUCE)

Compose X fontname from FIELDS.
FIELDS is a vector of XLFD fields, of length 12.
If a field is nil, wild-card letter `*' is embedded.
Optional argument REDUCE exists just for backward compatibility,
and is always ignored.