Add from_size() to get a default SurfaceConfiguration, simplify t…

…he use of users

CHANGELOG.md

@@ -110,6 +110,7 @@ SurfaceConfiguration {
 - 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)
 - Changed Naga variant in ShaderSource to `Cow<'static, Module>`, to allow loading global variables by @daxpedda in [#2903](https://github.com/gfx-rs/wgpu/pull/2903)
+- Add `from_size()` to get a default `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

@@ -3122,6 +3122,21 @@ pub struct SurfaceConfiguration {
     pub alpha_mode: CompositeAlphaMode,
 }
 
+impl SurfaceConfiguration {
+    /// Get a default `SurfaceConfiguration` from width and height
+    #[allow(dead_code)]
+    pub fn from_size(width: u32, height: u32) -> Self {
+        Self {
+            usage: crate::TextureUsages::RENDER_ATTACHMENT,
+            format: TextureFormat::Bgra8UnormSrgb,
+            width,
+            height,
+            present_mode: PresentMode::AutoVsync,
+            alpha_mode: CompositeAlphaMode::Auto,
+        }
+    }
+}
+
 /// Status of the recieved surface image.
 #[repr(C)]
 #[derive(Debug)]

wgpu/examples/framework.rs

@@ -267,14 +267,7 @@ fn start<E: Example>(
     }: Setup,
 ) {
     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,
-        alpha_mode: surface.get_supported_alpha_modes(&adapter)[0],
-    };
+    let mut config = wgpu::SurfaceConfiguration::from_size(size.width, size.height);
     surface.configure(&device, &config);
 
     log::info!("Initializing the example...");