impl Default for SurfaceConfiguration, simplify the use of users.

CHANGELOG.md

@@ -93,6 +93,7 @@ the same every time it is rendered, we now warn if it is missing.
 - Update Winit to version 0.27 and raw-window-handle to 0.5 by @wyatt-herkamp in  [#2918](https://github.com/gfx-rs/wgpu/pull/2918)
 - Address Clippy 0.1.63 complaints. By @jimblandy in [#2977](https://github.com/gfx-rs/wgpu/pull/2977)
 - Don't use `PhantomData` for `IdentityManager`'s `Input` type. By @jimblandy in [#2972](https://github.com/gfx-rs/wgpu/pull/2972)
+- Impl Default for `SurfaceConfiguration`, simplify the use of users. By @jinleili in [#3034](https://github.com/gfx-rs/wgpu/pull/3034)
 
 #### Metal
 - Extract the generic code into `get_metal_layer` by @jinleili in [#2826](https://github.com/gfx-rs/wgpu/pull/2826)

wgpu-types/src/lib.rs

@@ -3085,6 +3085,18 @@ pub struct SurfaceConfiguration {
     pub present_mode: PresentMode,
 }
 
+impl Default for SurfaceConfiguration {
+    fn default() -> Self {
+        Self {
+            usage: crate::TextureUsages::RENDER_ATTACHMENT,
+            format: TextureFormat::Bgra8UnormSrgb,
+            width: 0,
+            height: 0,
+            present_mode: PresentMode::Fifo,
+        }
+    }
+}
+
 /// Status of the recieved surface image.
 #[repr(C)]
 #[derive(Debug)]

wgpu/examples/framework.rs

@@ -268,11 +268,10 @@ fn start<E: Example>(
 ) {
     let spawner = Spawner::new();
     let mut config = wgpu::SurfaceConfiguration {
-        usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
         format: surface.get_supported_formats(&adapter)[0],
         width: size.width,
         height: size.height,
-        present_mode: wgpu::PresentMode::Fifo,
+        ..Default::default()
     };
     surface.configure(&device, &config);