Readjusted namespaces, removed Geometry example as it's no longer relevant.

graphics/src/layer/quad.rs

@@ -0,0 +1,30 @@
+/// A colored rectangle with a border.
+///
+/// This type can be directly uploaded to GPU memory.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Quad {
+    /// The position of the [`Quad`].
+    pub position: [f32; 2],
+
+    /// The size of the [`Quad`].
+    pub size: [f32; 2],
+
+    /// The color of the [`Quad`], in __linear RGB__.
+    pub color: [f32; 4],
+
+    /// The border color of the [`Quad`], in __linear RGB__.
+    pub border_color: [f32; 4],
+
+    /// The border radius of the [`Quad`].
+    pub border_radius: f32,
+
+    /// The border width of the [`Quad`].
+    pub border_width: f32,
+}
+
+#[allow(unsafe_code)]
+unsafe impl bytemuck::Zeroable for Quad {}
+
+#[allow(unsafe_code)]
+unsafe impl bytemuck::Pod for Quad {}