Searches variation axes of a #hb_font_t object for a specific axis first, if not set, then tries to get default style values from different tables of the font.
a #hb_font_t object.
a style tag.
Corresponding axis or default value to a style tag.
Searches variation axes of a #hb_font_t object for a specific axis first, if not set, then tries to get default style values from different tables of the font.