TT
>,
if <TT
CLASS="PARAMETER"
><I
>csp</I
></TT
> is not NULL.  This function
should be called only after FcConfigSubstitute and FcDefaultSubstitute have
been called for <TT
CLASS="PARAMETER"
><I
>p</I
></TT
>;
otherwise the results will not be correct.
    </P
><P
>The returned FcFontSet references FcPattern structures which may be shared
by the return value from multiple FcFontSort calls, applications cannot
modify these patterns.  Instead, they should be passed, along with
<TT
CLASS="PARAMETER"
><I
>pat