Function ndless_sys::gui_gc_fillGradient

pub unsafe extern "C" fn gui_gc_fillGradient(
    arg1: Gc, 
    x: c_int, 
    y: c_int, 
    w: c_int, 
    h: c_int, 
    start_color: c_int, 
    end_color: c_int, 
    vertical: c_int
)