FcPatternFilter - Filter the objects of pattern
#include <fontconfig.h>
FcPattern * FcPatternFilter(FcPattern *p);
(const FcObjectSet *);
.fi
Returns a new pattern that only has those objects from p that are in
os. If os is NULL, a duplicate of p is returned.
Fontconfig version 2.8.0
18 November 2009 FcPatternFilter(3)