add demo

README.md

@@ -19,3 +19,10 @@ cd rust-sdl2_image
 rustpkg install sdl2_image
 ```
 
+Demo
+----
+
+```
+rustpkg install demo
+./bin/demo image.[png|jpg]
+```

src/demo/main.rs

@@ -0,0 +1,24 @@
+#[crate_type = "bin"];
+
+extern mod sdl2;
+extern mod sdl2_image;
+extern mod native;
+
+use std::os;
+
+mod video;
+
+#[start]
+fn start(argc: int, argv: **u8) -> int {
+    native::start(argc, argv, main)
+}
+
+#[main]
+fn main() {
+    let args = os::args();
+    if args.len() < 2 {
+        println!("Usage: ./demo image.[png|jpg]")
+    } else {
+        video::main(args[1]);
+    }
+}

src/demo/video.rs

@@ -0,0 +1,54 @@
+use sdl2;
+use sdl2_image;
+use sdl2_image::LoadSurface;
+// use sdl2_image::LoadTexture;
+
+pub fn main(png: ~str) {
+    sdl2::init([sdl2::InitVideo]);
+    sdl2_image::init([sdl2_image::InitPng, sdl2_image::InitJpg]);
+
+    let window = match sdl2::video::Window::new("rust-sdl2 demo: Video", sdl2::video::PosCentered, sdl2::video::PosCentered, 800, 600, [sdl2::video::OpenGL]) {
+        Ok(window) => window,
+        Err(err) => fail!(format!("failed to create window: {}", err))
+    };
+
+    let renderer = match sdl2::render::Renderer::from_window(window, sdl2::render::DriverAuto, [sdl2::render::Accelerated]) {
+        Ok(renderer) => renderer,
+        Err(err) => fail!(format!("failed to create renderer: {}", err))
+    };
+
+    // Load a surface, and convert it to a texture bound to the renderer
+    let surface: ~sdl2::surface::Surface = match LoadSurface::from_file(png) {
+        Ok(surface) => surface,
+        Err(err) => fail!(format!("Failed to load png: {}", err))
+    };
+    let texture = match renderer.create_texture_from_surface(surface) {
+        Ok(texture) => texture,
+        Err(err) => fail!(format!("Failed to create surface: {}", err))
+    };
+
+    // Load a texture directly via the renderer
+    // let texture = match renderer.load_texture("test.png") {
+    //     Ok(texture) => texture,
+    //     Err(err) => fail!(format!("Could not set render target: {}", err))
+    // };
+
+    renderer.copy(texture, None, None);
+    renderer.present();
+
+    'main : loop {
+        'event : loop {
+            match sdl2::event::poll_event() {
+                sdl2::event::QuitEvent(_) => break 'main,
+                sdl2::event::KeyDownEvent(_, _, key, _, _) => {
+                    if key == sdl2::keycode::EscapeKey {
+                        break 'main
+                    }
+                }
+                _ => {}
+            }
+        }
+    }
+    sdl2_image::quit();
+    sdl2::quit();
+}

src/sdl2_image/lib.rs

@@ -37,6 +37,9 @@ mod others {
 
 mod ffi;
 
+// repr(C) "makes the size of the enum's discriminant the default
+// size of enums that the C ABI for the platform uses."
+#[repr(C)]
 #[deriving(Clone, Eq, IterBytes, ToStr)]
 pub enum InitFlag {
     InitJpg = ffi::IMG_INIT_JPG as int,