Initial pipeline abstraction

Source/Render/Pipeline/PolygonMode.rs

@@ -0,0 +1,21 @@
+use serde::{Deserialize, Serialize};
+
+/// Type of drawing mode for polygons
+#[repr(C)]
+#[derive(Copy, Clone, Debug, Hash, Eq, PartialEq, Serialize, Deserialize)]
+pub enum PolygonMode {
+    /// Polygons are filled
+    Fill = 0,
+
+    /// Polygons are drawn as line segments
+    Line = 1,
+
+    /// Polygons are drawn as points
+    Point = 2,
+}
+
+impl Default for PolygonMode {
+    fn default() -> Self {
+        Self::Fill
+    }
+}