fltk_sys::draw

Function Fl_rectf_with_rgb

Source 
pub unsafe extern "C" fn Fl_rectf_with_rgb(
    x: c_int,
    y: c_int,
    w: c_int,
    h: c_int,
    r: c_uchar,
    g: c_uchar,
    b: c_uchar,
)