xortexture.rs

extern crate sdl2;

use sdl2::event::Event;
use sdl2::keyboard::Keycode;
use sdl2::pixels::PixelFormatEnum::RGB24;
use sdl2::render::TextureAccess;

fn main() {
    let sdl = sdl2::init().unwrap();
    let video = sdl.video().unwrap();
    let window = video.window("Pixel fun", 0, 0).fullscreen_desktop().build().unwrap();
    let mut renderer = window.renderer().build().unwrap();
    let mut event_pump = sdl.event_pump().unwrap();
    let (w, h) = renderer.output_size().unwrap();
    let mut texture = renderer.create_texture(RGB24, TextureAccess::Streaming, w, h).unwrap();

    for t in 0.. {
        for event in event_pump.poll_iter() {
            match event {
                Event::Quit { .. } |
                Event::KeyDown { keycode: Some(Keycode::Escape), .. } => {
                    return;
                }
                _ => {}
            }
        }
        texture.with_lock(None, |data, _| {
                for (i, b) in data.iter_mut().enumerate() {
                    let x = i as u32 % w;
                    let y = i as u32 / w;
                    *b = ((x ^ y) + t) as u8;
                }
            })
            .unwrap();
        renderer.copy(&texture, None, None);
        renderer.present();
        std::thread::sleep(std::time::Duration::from_millis(16));
    }
}