Function lvgl_sys::lv_draw_mask_fade_init

pub unsafe extern "C" fn lv_draw_mask_fade_init(
    param: *mut lv_draw_mask_fade_param_t, 
    coords: *const lv_area_t, 
    opa_top: lv_opa_t, 
    y_top: lv_coord_t, 
    opa_bottom: lv_opa_t, 
    y_bottom: lv_coord_t
)