Sets our main struct and passes it to the parent class.
Converts an #hb_variation_t into a %NULL-terminated string in the format understood by hb_variation_from_string(). The client in responsible for allocating big enough size for @buf, 128 bytes is more than enough.
the main Gtk struct as a void*
Get the main Gtk struct
The #hb_tag_t tag of the variation-axis name
The value of the variation axis
the main Gtk struct
Data type for holding variation data. Registered OpenType variation-axis tags are listed in OpenType Axis Tag Registry.