Function lv_obj_transform_point 

pub unsafe extern "C" fn lv_obj_transform_point(
    obj: *const lv_obj_t,
    p: *mut lv_point_t,
    flags: lv_obj_point_transform_flag_t,
)

Transform a point using the angle and zoom style properties of an object @param obj pointer to an object whose style properties should be used @param p a point to transform, the result will be written back here too @param flags OR-ed valued of :cpp:enum:lv_obj_point_transform_flag_t