#hb_face_t to work upon
table tag to query, "GSUB" or "GPOS".
index of feature to query.
The ‘name’ table name ID that specifies a string for a user-interface label for this feature. (May be NULL.)
The ‘name’ table name ID that specifies a string that an application can use for tooltip text for this feature. (May be NULL.)
The ‘name’ table name ID that specifies sample text that illustrates the effect of this feature. (May be NULL.)
Number of named parameters. (May be zero.)
The first ‘name’ table name ID used to specify strings for user-interface labels for the feature parameters. (Must be zero if numParameters is zero.)
true if data found, false otherwise
Fetches name indices from feature parameters for "Stylistic Set" ('ssXX') or "Character Variant" ('cvXX') features.