From 8eb134908b409705ea539d1f57544ddd9b2a3b46 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Tue, 29 Sep 2020 19:17:20 +0300
Subject: [PATCH] Introduce gfx::drawable interface

---
 libs/gfx/include/psemek/gfx/drawable.hpp | 13 +++++++++++++
 libs/gfx/include/psemek/gfx/mesh.hpp     | 10 +++++++---
 2 files changed, 20 insertions(+), 3 deletions(-)
 create mode 100644 libs/gfx/include/psemek/gfx/drawable.hpp

diff --git a/libs/gfx/include/psemek/gfx/drawable.hpp b/libs/gfx/include/psemek/gfx/drawable.hpp
new file mode 100644
index 00000000..da6dd284
--- /dev/null
+++ b/libs/gfx/include/psemek/gfx/drawable.hpp
@@ -0,0 +1,13 @@
+#pragma once
+
+namespace psemek::gfx
+{
+
+	struct drawable
+	{
+		virtual void draw() const = 0;
+
+		virtual ~drawable() {}
+	};
+
+}
diff --git a/libs/gfx/include/psemek/gfx/mesh.hpp b/libs/gfx/include/psemek/gfx/mesh.hpp
index 8cd44622..1de5052d 100644
--- a/libs/gfx/include/psemek/gfx/mesh.hpp
+++ b/libs/gfx/include/psemek/gfx/mesh.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <psemek/gfx/gl.hpp>
+#include <psemek/gfx/drawable.hpp>
 
 #include <psemek/geom/vector.hpp>
 #include <psemek/geom/point.hpp>
@@ -386,6 +387,7 @@ namespace psemek::gfx
 	}
 
 	struct mesh
+		: drawable
 	{
 		static mesh null();
 
@@ -471,7 +473,7 @@ namespace psemek::gfx
 			load(simplices.data(), simplices.size(), usage);
 		}
 
-		void draw() const
+		void draw() const override
 		{
 			if (count_ == 0) return;
 
@@ -503,6 +505,7 @@ namespace psemek::gfx
 	};
 
 	struct indexed_mesh
+		: drawable
 	{
 		static indexed_mesh null();
 
@@ -593,7 +596,7 @@ namespace psemek::gfx
 			load(simplices.data(), simplices.size(), indices.data(), indices.size(), usage);
 		}
 
-		void draw() const
+		void draw() const override
 		{
 			if (count_ == 0) return;
 
@@ -627,6 +630,7 @@ namespace psemek::gfx
 	};
 
 	struct instanced_mesh
+		: drawable
 	{
 		static instanced_mesh null();
 
@@ -732,7 +736,7 @@ namespace psemek::gfx
 			load_instance(instances.data(), instances.size(), usage);
 		}
 
-		void draw() const
+		void draw() const override
 		{
 			if (count_ == 0) return;
 			if (instance_count_ == 0) return;