Duplicate the Cg renderer as a base for the glsl renderer.

OpenRA.Renderer.Gl/IndexBuffer.cs

@@ -0,0 +1,61 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made 
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see LICENSE.
+ */
+#endregion
+
+using System;
+using OpenRA.FileFormats.Graphics;
+using Tao.OpenGl;
+
+namespace OpenRA.Renderer.Glsl
+{
+	public class IndexBuffer : IIndexBuffer, IDisposable
+	{
+		int buffer;
+
+		public IndexBuffer(GraphicsDevice dev, int size)
+		{
+			Gl.glGenBuffers(1, out buffer);
+			GraphicsDevice.CheckGlError();
+			Bind();
+			Gl.glBufferData(Gl.GL_ELEMENT_ARRAY_BUFFER,
+				new IntPtr(2 * size),
+				new ushort[ size ],
+				Gl.GL_DYNAMIC_DRAW);
+			GraphicsDevice.CheckGlError();
+		}
+
+		public void SetData(ushort[] data, int length)
+		{
+			Bind();
+			Gl.glBufferSubData(Gl.GL_ELEMENT_ARRAY_BUFFER,
+				IntPtr.Zero,
+				new IntPtr(2 * length),
+				data);
+			GraphicsDevice.CheckGlError();
+		}
+
+		public void Bind()
+		{
+			Gl.glBindBuffer(Gl.GL_ELEMENT_ARRAY_BUFFER, buffer);
+			GraphicsDevice.CheckGlError();
+		}
+
+		bool disposed;
+		public void Dispose()
+		{
+			if (disposed) return;
+			GC.SuppressFinalize(this);
+			Gl.glDeleteBuffers(1, ref buffer);
+			GraphicsDevice.CheckGlError();
+			disposed = true;
+		}
+
+		//~IndexBuffer() { Dispose(); }
+	}
+}