Implement Geometry2D primitive

core/src/geometry.rs

@@ -0,0 +1,20 @@
+/// A two-dimensional vertex which has a color
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct Vertex2D {
+    /// The vertex position
+    pub position: [f32; 2],
+    /// The vertex color in rgba
+    pub color: [f32; 4],
+}
+
+/// A set of [`Vertex2D`] and indices for drawing some 2D geometry on the GPU.
+///
+/// [`Vertex2D`]: struct.Vertex2D.html
+#[derive(Clone, Debug)]
+pub struct Geometry2D {
+    /// The vertices for this geometry
+    pub vertices: Vec<Vertex2D>,
+    /// The indices for this geometry
+    pub indices: Vec<u16>,
+}

core/src/lib.rs

@@ -23,6 +23,7 @@ mod length;
 mod point;
 mod rectangle;
 mod vector;
+mod geometry;
 
 pub use align::{Align, HorizontalAlignment, VerticalAlignment};
 pub use background::Background;
@@ -32,6 +33,7 @@ pub use length::Length;
 pub use point::Point;
 pub use rectangle::Rectangle;
 pub use vector::Vector;
+pub use geometry::{Vertex2D, Geometry2D};
 
 #[cfg(feature = "command")]
 mod command;