Examples now using a support module to draw

examples/support/mod.rs

@@ -0,0 +1,32 @@
+#[phase(plugin)]
+extern crate gl_generator;
+
+use gl_init;
+
+mod gl {
+    generate_gl_bindings!("gl", "core", "4.5", "struct")
+}
+
+pub struct Context {
+    gl: gl::Gl
+}
+
+pub fn load(window: &gl_init::Window) -> Context {
+    let gl = gl::Gl::load_with(|symbol| window.get_proc_address(symbol));
+
+    let version = {
+        use std::c_str::CString;
+        unsafe { CString::new(gl.GetString(gl::VERSION) as *const i8, false) }
+    };
+
+    println!("OpenGL version {}", version.as_str().unwrap());
+
+    Context { gl: gl }
+}
+
+impl Context {
+    pub fn draw_frame(&self, color: (f32, f32, f32, f32)) {
+        self.gl.ClearColor(color.0, color.1, color.2, color.3);
+        self.gl.Clear(gl::COLOR_BUFFER_BIT);
+    }
+}