Remove SwapChain associated type from Compositor

graphics/src/window/compositor.rs

@@ -16,9 +16,6 @@ pub trait Compositor: Sized {
     /// The surface of the backend.
     type Surface;
 
-    /// The swap chain of the backend.
-    type SwapChain;
-
     /// Creates a new [`Compositor`].
     fn new<W: HasRawWindowHandle>(
         settings: Self::Settings,
@@ -37,12 +34,12 @@ pub trait Compositor: Sized {
     ///
     /// [`SwapChain`]: Self::SwapChain
     /// [`Surface`]: Self::Surface
-    fn create_swap_chain(
+    fn configure_surface(
         &mut self,
-        surface: &Self::Surface,
+        surface: &mut Self::Surface,
         width: u32,
         height: u32,
-    ) -> Self::SwapChain;
+    );
 
     /// Draws the output primitives to the next frame of the given [`SwapChain`].
     ///
@@ -50,7 +47,6 @@ pub trait Compositor: Sized {
     fn draw<T: AsRef<str>>(
         &mut self,
         renderer: &mut Self::Renderer,
-        swap_chain: &mut Self::SwapChain,
         surface: &mut Self::Surface,
         viewport: &Viewport,
         background_color: Color,

wgpu/src/window/compositor.rs

@@ -88,7 +88,6 @@ impl iced_graphics::window::Compositor for Compositor {
     type Settings = Settings;
     type Renderer = Renderer;
     type Surface = wgpu::Surface;
-    type SwapChain = ();
 
     fn new<W: HasRawWindowHandle>(
         settings: Self::Settings,
@@ -115,12 +114,12 @@ impl iced_graphics::window::Compositor for Compositor {
         }
     }
 
-    fn create_swap_chain(
+    fn configure_surface(
         &mut self,
-        surface: &Self::Surface,
+        surface: &mut Self::Surface,
         width: u32,
         height: u32,
-    ) -> Self::SwapChain {
+    ) {
         surface.configure(
             &self.device,
             &wgpu::SurfaceConfiguration {
@@ -130,13 +129,12 @@ impl iced_graphics::window::Compositor for Compositor {
                 width,
                 height,
             },
-        )
+        );
     }
 
     fn draw<T: AsRef<str>>(
         &mut self,
         renderer: &mut Self::Renderer,
-        _swap_chain: &mut Self::SwapChain,
         surface: &mut Self::Surface,
         viewport: &Viewport,
         background_color: Color,

winit/src/application.rs

@@ -232,15 +232,14 @@ async fn run_instance<A, E, C>(
 
     let mut state = State::new(&application, &window);
     let mut viewport_version = state.viewport_version();
-    let mut swap_chain = {
-        let physical_size = state.physical_size();
 
-        compositor.create_swap_chain(
-            &surface,
-            physical_size.width,
-            physical_size.height,
-        )
-    };
+    let physical_size = state.physical_size();
+
+    compositor.configure_surface(
+        &mut surface,
+        physical_size.width,
+        physical_size.height,
+    );
 
     let mut user_interface = ManuallyDrop::new(build_user_interface(
         &mut application,
@@ -358,8 +357,8 @@ async fn run_instance<A, E, C>(
                         .draw(&mut renderer, state.cursor_position());
                     debug.draw_finished();
 
-                    swap_chain = compositor.create_swap_chain(
-                        &surface,
+                    compositor.configure_surface(
+                        &mut surface,
                         physical_size.width,
                         physical_size.height,
                     );
@@ -369,7 +368,6 @@ async fn run_instance<A, E, C>(
 
                 match compositor.draw(
                     &mut renderer,
-                    &mut swap_chain,
                     &mut surface,
                     state.viewport(),
                     state.background_color(),