Man page - fcpatternfilter(3)
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Manual
FcPatternFilter
NAMESYNOPSIS
DESCRIPTION
NAME
FcPatternFilter - Filter the objects of pattern
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcPattern * FcPatternFilter (FcPattern * p , const FcObjectSet * os );
DESCRIPTION
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.