minimal sdl2 example

flake.nix

@@ -62,11 +62,7 @@
             alsa-lib.dev
             systemd.dev
 
-            # X11 libs
+            SDL2
-            xorg.libX11
-            xorg.libXcursor
-            xorg.libXi
-            xorg.libXrandr
           ];
         };
       });

src/main.rs

@@ -1,3 +1,44 @@
-fn main() {
+extern crate sdl2;
+
+use sdl2::pixels::Color;
+use sdl2::event::Event;
+use sdl2::keyboard::Keycode;
+use std::time::Duration;
+
+pub fn main() {
     println!("Hello, world!");
+    let sdl_context = sdl2::init().unwrap();
+    let vide_subsystem = sdl_context.video().unwrap();
+
+    let window = vide_subsystem.window("fractals", 800, 600)
+        .position_centered()
+        .build()
+        .unwrap();
+
+    let mut canvas = window.into_canvas().build().unwrap();
+
+    canvas.set_draw_color(Color::RGB(0, 255, 255));
+    canvas.clear();
+    canvas.present();
+
+    let mut event_pump = sdl_context.event_pump().unwrap();
+    let mut i = 0;
+
+    'running: loop {
+        i = (i + 1) % 255;
+        canvas.set_draw_color(Color::RGB(i, 64, 255 - i));
+        canvas.clear();
+        for event in event_pump.poll_iter() {
+            match event {
+                Event::Quit { .. } |
+                Event::KeyDown { keycode: Some(Keycode::Escape), .. } => {
+                    break 'running
+                },
+                _ => {}
+            }
+        }
+
+        canvas.present();
+        ::std::thread::sleep(Duration::new(0, 1_000_000_000 / 60));
+    }
 }