#include <fontconfig.h>
FcCharSet * FcFreeTypeCharSet (FT_Faceface, FcBlanks *blanks);
Scans a FreeType face and returns the set of encoded Unicode chars. This scans several encoding tables to build as complete a list as possible. If 'blanks' is not 0, the glyphs in the font are examined and any blank glyphs not in 'blanks' are not placed in the returned FcCharSet.
Fontconfig version 2.3.2