FcConfigSubstituteWithPat - Execute substitutions
#include <fontconfig/fontconfig.h>
FcBool FcConfigSubstituteWithPat (FcConfig *config, FcPattern *p, FcPattern *p_pat, FcMatchKind kind);
Performs the sequence of pattern modification operations, if
kind is FcMatchPattern, then those tagged as pattern operations are
applied, else if kind is FcMatchFont, those tagged as font operations
are applied and p_pat is used for <test> elements with target=pattern.
Returns FcFalse if the substitution cannot be performed (due to allocation
failure). Otherwise returns FcTrue. If config is NULL, the current
configuration is used.