pub fn wait_vbl()Expand description
Calls waitvbl, which waits for a vertical blanking signal.
This should usually be called once per frame.
Examples found in repository?
examples/keyboard.rs (line 15)
8pub extern "C" fn dosmain() -> i32 {
9 goto_xy(2, 2);
10 put_str("KEYBOARD DEMO");
11 goto_xy(0, 16);
12 put_str("ESC - quit");
13 curs_off();
14 while !shutting_down() {
15 wait_vbl();
16 let keys = read_keys();
17
18 if !keys.is_empty() {
19 goto_xy(5, 5);
20 dos_like::text_color(3);
21 put_str("!");
22 dos_like::text_color(7);
23
24 for (i, key) in keys.iter().enumerate() {
25 goto_xy(2, 8 + i as u16);
26 put_str(" ");
27 goto_xy(2, 8 + i as u16);
28 if key.is_pressed() {
29 put_str(format!("{:?} pressed ", key.key_code()));
30 } else {
31 put_str(format!("{:?} released ", key.key_code()));
32 }
33 }
34 for i in keys.len()..8 {
35 goto_xy(2, 8 + i as u16);
36 put_str(" ");
37 }
38 } else {
39 goto_xy(5, 5);
40 put_str(" ");
41 }
42
43 if key_state(KeyCode::KEY_ESCAPE) {
44 break;
45 }
46 }
47 0
48}