hb_blob_create hb_blob_destroy hb_blob_get_length hb_buffer_add_codepoints hb_buffer_add_utf8 hb_buffer_create hb_buffer_destroy hb_buffer_get_cluster_level hb_buffer_get_direction hb_buffer_get_language hb_buffer_get_length hb_buffer_get_script hb_buffer_guess_segment_properties hb_buffer_reverse hb_buffer_set_cluster_level hb_buffer_set_direction hb_buffer_set_language hb_buffer_set_script hb_direction_from_string hb_direction_to_string hb_face_create hb_face_destroy hb_face_get_upem hb_feature_from_string hb_feature_to_string hb_font_create hb_font_destroy hb_font_get_scale hb_font_set_scale hb_language_from_string hb_language_to_string hb_script_from_iso15924_tag hb_script_from_string hb_script_to_iso15924_tag hb_shape hb_shape_full hb_shape_list_shapers hb_tag_from_string hb_tag_to_string hb_unicode_script hb_version