+void
+hb_ot_layout_set_hinting (hb_ot_layout_t *layout,
+ hb_bool_t hinted);
+
+void
+hb_ot_layout_set_scale (hb_ot_layout_t *layout,
+ hb_16dot16_t x_scale, hb_16dot16_t y_scale);
+
+void
+hb_ot_layout_set_ppem (hb_ot_layout_t *layout,
+ unsigned int x_ppem, unsigned int y_ppem);
+