colors: add surface resize event

userspace/graphics/colors/src/main.rs

@@ -301,6 +301,15 @@ impl WindowServer for Server<'_> {
         Command::new("/bin/colors-bar").spawn().ok();
     }
 
+    fn handle_display_resize(&mut self, tx: &mut ServerSender, mut surface: DisplaySurface) {
+        log::info!("Display resize: {}x{}", surface.width(), surface.height());
+        self.display
+            .resize(surface.width() as u32, surface.height() as u32);
+        surface.fill(self.background);
+        self.redraw_all(tx);
+        surface.present();
+    }
+
     fn handle_client_message(
         &mut self,
         mut surface: DisplaySurface,

userspace/graphics/colors/src/sys/mod.rs

@@ -32,6 +32,7 @@ pub struct Point<T>(pub T, pub T);
 
 pub trait WindowServer {
     fn handle_initial(&mut self, surface: DisplaySurface);
+    fn handle_display_resize(&mut self, tx: &mut ServerSender, surface: DisplaySurface);
     fn handle_client_message(
         &mut self,
         surface: DisplaySurface,

userspace/graphics/colors/src/sys/unix.rs

@@ -174,7 +174,13 @@ impl<S: WindowServer> ApplicationHandler<FromClient> for Backend<S> {
                 let width = NonZero::new(size.width).unwrap();
                 let height = NonZero::new(size.height).unwrap();
                 surface.resize(width, height).unwrap();
-                surface.buffer_mut().unwrap().present().unwrap();
+                let display_surface = DisplaySurface {
+                    inner: surface.buffer_mut().unwrap(),
+                    width: size.width as usize,
+                    height: size.height as usize,
+                };
+                self.server
+                    .handle_display_resize(&mut self.tx, display_surface);
             }
             WindowEvent::KeyboardInput { event, .. } => {
                 if let Some(event) = convert_key_event(event) {