Add background_color to Settings

winit/src/application.rs

@@ -279,8 +279,12 @@ pub trait Application: Sized {
                     resized = false;
                 }
 
-                let new_mouse_cursor =
-                    renderer.draw(&primitive, &debug.overlay(), &mut target);
+                let new_mouse_cursor = renderer.draw(
+                    settings.background_color,
+                    &primitive,
+                    &debug.overlay(),
+                    &mut target,
+                );
 
                 debug.render_finished();
 

winit/src/settings/mod.rs

@@ -1,4 +1,5 @@
 //! Configure your application.
+use crate::Color;
 
 #[cfg(target_os = "windows")]
 #[path = "windows.rs"]
@@ -10,12 +11,24 @@ mod platform;
 pub use platform::PlatformSpecific;
 
 /// The settings of an application.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Settings {
     /// The [`Window`] settings
     ///
     /// [`Window`]: struct.Window.html
     pub window: Window,
+
+    /// The default background color of the application
+    pub background_color: Color,
+}
+
+impl Default for Settings {
+    fn default() -> Settings {
+        Settings {
+            window: Window::default(),
+            background_color: Color::WHITE,
+        }
+    }
 }
 
 /// The window settings of an application.