Initial wgpu abstraction

Source/Render/VertexAttribute.rs

@@ -0,0 +1,21 @@
+use super::VertexFormat;
+use serde::{Deserialize, Serialize};
+use std::borrow::Cow;
+
+#[derive(Clone, Debug, Hash, Eq, PartialEq, Serialize, Deserialize)]
+pub struct VertexAttribute {
+    pub label: Cow<'static, str>,
+    pub format: VertexFormat,
+    pub offset: usize,
+    pub shader_location: u32,
+}
+
+impl From<VertexAttribute> for wgpu::VertexAttribute {
+    fn from(attr: VertexAttribute) -> Self {
+        wgpu::VertexAttribute {
+            offset: attr.offset as wgpu::BufferAddress,
+            shader_location: attr.shader_location,
+            format: attr.format.into(),
+        }
+    }
+}