window_copy_write_lines
window_copy_write_lines(wme, &ctx, 0, screen_size_y(s));
static void window_copy_write_lines(struct window_mode_entry *,
window_copy_write_lines(wme, &ctx, screen_size_y(s) - ny, ny);
window_copy_write_lines(wme, &ctx, 0, ny);