Function libnotcurses_sys::ncplane_stain

pub unsafe extern "C" fn ncplane_stain(
    n: *mut ncplane, 
    ystop: c_int, 
    xstop: c_int, 
    ul: u64, 
    ur: u64, 
    ll: u64, 
    lr: u64
) -> c_int

Set the given channels throughout the specified region, keeping content and attributes unchanged. Returns the number of cells set, or -1 on failure.