examples: improve simple.rs

Cargo.toml

@@ -23,7 +23,8 @@ rental = "0.4.11"
 gl_generator = "0.5"
 
 [dev-dependencies]
-slog-term = "~1.5"
+slog-term = "2.0"
+slog-async = "2.0"
 
 [features]
 default = ["backend_winit", "backend_libinput", "renderer_glium"]

examples/simple.rs

@@ -2,36 +2,70 @@ extern crate wayland_server;
 extern crate smithay;
 extern crate glium;
 
+#[macro_use]
+extern crate slog;
+extern crate slog_async;
+extern crate slog_term;
+
+use slog::*;
+
 use glium::Surface;
+
 use smithay::backend::graphics::glium::IntoGlium;
 use smithay::backend::input::InputBackend;
 use smithay::backend::winit;
 use smithay::shm::ShmGlobal;
-use wayland_server::protocol::wl_shm;
+use smithay::compositor::{CompositorHandler, self};
+
+use wayland_server::protocol::{wl_compositor, wl_shm, wl_subcompositor};
+
+struct SurfaceHandler;
+
+impl compositor::Handler for SurfaceHandler {
+}
 
 fn main() {
+    // A logger facility, here we use the terminal for this example
+    let log = Logger::root(slog_async::Async::default(slog_term::term_full().fuse()).fuse(), o!());
+
     // Initialize a simple backend for testing
-    let (renderer, mut input) = winit::init().unwrap();
+    let (renderer, mut input) = winit::init(log.clone()).unwrap();
 
     let (_display, mut event_loop) = wayland_server::create_display();
 
+    /*
+     * Initialize wl_shm global
+     */
     // Insert the ShmGlobal as a handler to your event loop
     // Here, we specify tha the standard Argb8888 and Xrgb8888 is the only supported.
-    let handler_id = event_loop.add_handler_with_init(ShmGlobal::new(
-        vec![],
-        None, /* we don't provide a logger here */
-    ));
-
+    let shm_handler_id =
+        event_loop.add_handler_with_init(ShmGlobal::new(vec![], log.clone()));
     // Register this handler to advertise a wl_shm global of version 1
-    let shm_global = event_loop.register_global::<wl_shm::WlShm, ShmGlobal>(handler_id, 1);
+    event_loop.register_global::<wl_shm::WlShm, ShmGlobal>(shm_handler_id, 1);
 
-    // Retrieve the shm token for later use to access the buffers
-    let shm_token = {
+    /*
+     * Initialize the compositor global
+     */
+    let compositor_handler_id =
+        event_loop.add_handler_with_init(CompositorHandler::<(),_>::new(SurfaceHandler, log.clone()));
+    // register it to handle wl_compositor and wl_subcompositor
+    event_loop.register_global::<wl_compositor::WlCompositor, CompositorHandler<(),SurfaceHandler>>(compositor_handler_id, 4);
+    event_loop.register_global::<wl_subcompositor::WlSubcompositor, CompositorHandler<(),SurfaceHandler>>(compositor_handler_id, 1);
+
+    /*
+     * retrieve the tokens
+     */
+    let (shm_token, compositor_token) = {
         let state = event_loop.state();
-        state.get_handler::<ShmGlobal>(handler_id).get_token()
+        (
+            state.get_handler::<ShmGlobal>(shm_handler_id).get_token(),
+            state.get_handler::<CompositorHandler<(),SurfaceHandler>>(compositor_handler_id).get_token()
+        )
     };
 
-    // Init glium
+    /*
+     * Initialize glium
+     */
     let context = renderer.into_glium();