Add ttf rendering test code

src/main.rs

@@ -1,3 +1,74 @@
-fn main() {
-    println!("Hello, world!");
+extern crate sdl2; 
+
+use sdl2::pixels::Color;
+use sdl2::rect::Rect;
+use sdl2::event::Event;
+use sdl2::keyboard::Keycode;
+
+use std::time::Duration;
+use std::path::Path;
+
+use sdl2::ttf::*;
+
+static SCREEN_WIDTH: u32 = 480;
+static SCREEN_HEIGHT: u32 = 320;
+
+macro_rules! rect(
+    ($x:expr, $y:expr, $w:expr, $h:expr) => (
+        Rect::new($x as i32, $y as i32, $w as u32, $h as u32)
+    )
+);
+
+pub fn main() {
+    let sdl_context = sdl2::init().unwrap();
+    let video_subsystem = sdl_context.video().unwrap();
+ 
+    let window = video_subsystem.window("rust-sdl2 demo", 480, 320)
+        .position_centered()
+        .build()
+        .unwrap();
+ 
+    let mut canvas = window.into_canvas().build().unwrap();
+    let texture_creator = canvas.texture_creator();
+
+    // Font stuff
+    let ttf_context = sdl2::ttf::init().map_err(|e| e.to_string()).unwrap();
+    let font_path = Path::new("assets/handel_gothic_regular.ttf");
+    let mut font = ttf_context.load_font(font_path, 128).unwrap();
+
+    let surface = font
+        .render("LIFE SUPPORT")
+        .blended(Color::RGBA(200, 200, 200, 255))
+        .map_err(|e| e.to_string()).unwrap();
+
+    let texture = texture_creator
+        .create_texture_from_surface(&surface)
+        .map_err(|e| e.to_string()).unwrap();
+
+    let target = rect!(110, 20, 260, 24);
+ 
+    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(48, 39, 49));
+        canvas.clear();
+        canvas.copy(&texture, None, Some(target)).unwrap();
+        for event in event_pump.poll_iter() {
+            match event {
+                Event::Quit {..} |
+                Event::KeyDown { keycode: Some(Keycode::Escape), .. } => {
+                    break 'running
+                },
+                _ => {}
+            }
+        }
+        // The rest of the game loop goes here...
+
+        canvas.present();
+        ::std::thread::sleep(Duration::new(0, 1_000_000_000u32 / 60));
+    }
 }