StaticDrawStringCallback(FcChar32 aChar, nsFontXft *aFont, void *aData)
StaticDrawStringCallback(const FcChar32 *aString, PRUint32 aLen, nsFontXft *aFont, void *aData)
StaticDrawStringCallback(FcChar32 aChar, nsFontXft *aFont, void *aData){    DrawStringData *data = (DrawStringData *)aData;    data->metrics->DrawStringCallback(aChar, aFont, aData);}