Fix crash on windows when window is minimized

src/app/common.rs

@@ -58,6 +58,7 @@ pub struct WindowState {
     pub surface_desc: wgpu::SurfaceConfiguration,
     pub surface: wgpu::Surface<'static>,
     pub hidpi_factor: f64,
+    pub minimized: bool,
 }
 
 impl WindowState {
@@ -105,6 +106,7 @@ impl WindowState {
             surface_desc,
             surface,
             hidpi_factor,
+            minimized: false,
         }
     }
 
@@ -114,9 +116,14 @@ impl WindowState {
     }
 
     pub fn handle_resize(&mut self, size: &PhysicalSize<u32>) {
+        if size.width > 0 && size.height > 0 {
+            self.minimized = false;
             self.surface_desc.width = size.width;
             self.surface_desc.height = size.height;
             self.surface.configure(&self.device, &self.surface_desc);
+        } else {
+            self.minimized = true;
+        }
     }
 }
 

src/app/game.rs

@@ -30,6 +30,7 @@ pub struct GameWindow {
     client: EmulatorClient,
     input_mapper: Arc<RwLock<InputMapper>>,
     proxy: EventLoopProxy<UserEvent>,
+    paused_due_to_minimize: bool,
 }
 
 impl GameWindow {
@@ -165,6 +166,7 @@ impl GameWindow {
             client,
             input_mapper,
             proxy,
+            paused_due_to_minimize: false,
         }
     }
 
@@ -181,7 +183,9 @@ impl GameWindow {
         let frame = match window.surface.get_current_texture() {
             Ok(frame) => frame,
             Err(e) => {
+                if !self.window.minimized {
                     eprintln!("dropped frame: {e:?}");
+                }
                 return;
             }
         };
@@ -325,7 +329,18 @@ impl AppWindow for GameWindow {
     fn handle_event(&mut self, event_loop: &ActiveEventLoop, event: &Event<UserEvent>) {
         match event {
             Event::WindowEvent { event, .. } => match event {
-                WindowEvent::Resized(size) => self.window.handle_resize(size),
+                WindowEvent::Resized(size) => {
+                    self.window.handle_resize(size);
+                    if self.window.minimized {
+                        if self.client.is_running() {
+                            self.client.send_command(EmulatorCommand::Pause);
+                            self.paused_due_to_minimize = true;
+                        }
+                    } else if self.paused_due_to_minimize {
+                        self.client.send_command(EmulatorCommand::Resume);
+                        self.paused_due_to_minimize = false;
+                    }
+                }
                 WindowEvent::CloseRequested => event_loop.exit(),
                 WindowEvent::RedrawRequested => self.draw(event_loop),
                 _ => (),

src/app/input.rs

@@ -73,7 +73,9 @@ impl InputWindow {
         let frame = match window.surface.get_current_texture() {
             Ok(frame) => frame,
             Err(e) => {
+                if !self.window.minimized {
                     eprintln!("dropped frame: {e:?}");
+                }
                 return;
             }
         };