More documentation for TextureView. (#7069)

Explain how to make one and what its properties are.

wgpu/src/api/texture.rs

@@ -37,7 +37,11 @@ impl Texture {
         }
     }
 
-    /// Creates a view of this texture.
+    /// Creates a view of this texture, specifying an interpretation of its texels and
+    /// possibly a subset of its layers and mip levels.
+    ///
+    /// Texture views are needed to use a texture as a binding in a [`BindGroup`]
+    /// or as an attachment in a [`RenderPass`].
     pub fn create_view(&self, desc: &TextureViewDescriptor<'_>) -> TextureView {
         let view = self.inner.create_view(desc);
 

wgpu/src/api/texture_view.rs

@@ -2,8 +2,11 @@ use crate::*;
 
 /// Handle to a texture view.
 ///
-/// A `TextureView` object describes a texture and associated metadata needed by a
-/// [`RenderPipeline`] or [`BindGroup`].
+/// A `TextureView` object refers to a [`Texture`], or a subset of its layers and mip levels, and
+/// specifies an interpretation of the texture’s texels, which is needed to use a texture as a
+/// binding in a [`BindGroup`] or as an attachment in a [`RenderPass`].
+/// It can be created using [`Texture::create_view()`], which accepts a [`TextureViewDescriptor`]
+/// specifying the properties of the view.
 ///
 /// Corresponds to [WebGPU `GPUTextureView`](https://gpuweb.github.io/gpuweb/#gputextureview).
 #[derive(Debug, Clone)]