minifb_sleep

extern crate minifb;
use std::time::{Duration, Instant};
use std::thread::sleep;

use minifb::{Key, WindowOptions, Window};

fn main() {
    let mut buffer: Vec<u32> = vec![0; 2048 * 1024];

    let mut window = Window::new("Test - ESC to exit",
                                 2048,
                                 1024,
                                 WindowOptions::default()
                                 ).unwrap();
    let mut cnt: u32 = 0;
    for i in buffer.iter_mut() {
         *i = cnt;
         cnt+=1;
    }
    std::thread::sleep(Duration::new(0,15000000));
    window.update_with_buffer(&buffer).unwrap();
    
    while window.is_open() && !window.is_key_down(Key::Escape) {
        let start = Instant::now();
        window.update();
        let spend = start.elapsed();
        sleep(Duration::new(0,1000000000/60).checked_sub(spend).unwrap_or(Duration::new(0,0)));
    }
}