Function fltk_sys::draw::Fl_copy_offscreen

pub unsafe extern "C" fn Fl_copy_offscreen(
    x: c_int, 
    y: c_int, 
    w: c_int, 
    h: c_int, 
    pixmap: *mut c_void, 
    srcx: c_int, 
    srcy: c_int
)