pub fn copy_blocks(dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>,
dx: usize, dy: usize, sx: isize, sy: isize, bw: usize, bh: usize,
preborder: usize, postborder: usize,
pub fn copy_blocks(dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>,
dx: usize, dy: usize, sx: isize, sy: isize, bw: usize, bh: usize,
preborder: usize, postborder: usize,