+fn gl_info(display : &glium::Display) {
+ let version = *display.get_opengl_version();
+ let api = match version {
+ glium::Version(glium::Api::Gl, _, _) => "OpenGL",
+ glium::Version(glium::Api::GlEs, _, _) => "OpenGL ES"
+ };
+ println!("{} context verson: {}", api, display.get_opengl_version_string());
+}
+
+#[cfg(target_os = "emscripten")]
+#[allow(non_camel_case_types)]
+type em_callback_func = unsafe extern fn();
+#[cfg(target_os = "emscripten")]
+extern {
+ fn emscripten_set_main_loop(func : em_callback_func, fps : c_int, simulate_infinite_loop : c_int);
+}
+
+#[cfg(target_os = "emscripten")]
+thread_local!(static MAIN_LOOP_CALLBACK: std::cell::RefCell<*mut c_void> =
+ std::cell::RefCell::new(std::ptr::null_mut()));
+
+#[cfg(target_os = "emscripten")]
+pub fn set_main_loop_callback<F>(callback : F) where F : FnMut() -> support::Action {
+ MAIN_LOOP_CALLBACK.with(|log| {
+ *log.borrow_mut() = &callback as *const _ as *mut c_void;
+ });
+
+ unsafe { emscripten_set_main_loop(wrapper::<F>, 0, 1); }
+
+ unsafe extern "C" fn wrapper<F>() where F : FnMut() -> support::Action {
+ MAIN_LOOP_CALLBACK.with(|z| {
+ let closure = *z.borrow_mut() as *mut F;
+ (*closure)();
+ });
+ }
+}
+
+#[cfg(not(target_os = "emscripten"))]
+pub fn set_main_loop_callback<F>(callback : F) where F : FnMut() -> support::Action {
+ support::start_loop(callback);
+}
+