+/* func types */
+
+typedef hb_bool_t (*hb_font_get_glyph_func_t) (hb_font_t *font, void *font_data,
+ hb_codepoint_t unicode, hb_codepoint_t variation_selector,
+ hb_codepoint_t *glyph,
+ void *user_data);
+
+
+typedef hb_position_t (*hb_font_get_glyph_advance_func_t) (hb_font_t *font, void *font_data,
+ hb_codepoint_t glyph,
+ void *user_data);
+typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_h_advance_func_t;
+typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_v_advance_func_t;
+
+typedef hb_bool_t (*hb_font_get_glyph_origin_func_t) (hb_font_t *font, void *font_data,
+ hb_codepoint_t glyph,
+ hb_position_t *x, hb_position_t *y,
+ void *user_data);
+typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_h_origin_func_t;
+typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_v_origin_func_t;
+
+typedef hb_position_t (*hb_font_get_glyph_kerning_func_t) (hb_font_t *font, void *font_data,
+ hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
+ void *user_data);
+typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_h_kerning_func_t;
+typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_v_kerning_func_t;
+
+
+typedef hb_bool_t (*hb_font_get_glyph_extents_func_t) (hb_font_t *font, void *font_data,
+ hb_codepoint_t glyph,
+ hb_glyph_extents_t *extents,
+ void *user_data);
+typedef hb_bool_t (*hb_font_get_glyph_contour_point_func_t) (hb_font_t *font, void *font_data,
+ hb_codepoint_t glyph, unsigned int point_index,
+ hb_position_t *x, hb_position_t *y,
+ void *user_data);
+
+
+/* func setters */