Since 4.0.0A newly allocated HarfBuzz.draw_funcs_t with a reference count of 1. The initial reference count should be released with hb_draw_funcs_destroy when you are done using the HarfBuzz.draw_funcs_t. This function never returns NULL. If memory cannot be allocated, a special singleton HarfBuzz.draw_funcs_t object will be returned.
Creates a new draw callbacks object.