Split PaletteReference into its own file.

OpenRA.Game/Graphics/PaletteReference.cs

@@ -0,0 +1,37 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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 COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using OpenRA.Traits;
+
+namespace OpenRA.Graphics
+{
+	public sealed class PaletteReference
+	{
+		readonly float index;
+		readonly HardwarePalette hardwarePalette;
+
+		public readonly string Name;
+		public IPalette Palette { get; internal set; }
+		public float TextureIndex { get { return index / hardwarePalette.Height; } }
+		public float TextureMidIndex { get { return (index + 0.5f) / hardwarePalette.Height; } }
+
+		public PaletteReference(string name, int index, IPalette palette, HardwarePalette hardwarePalette)
+		{
+			Name = name;
+			Palette = palette;
+			this.index = index;
+			this.hardwarePalette = hardwarePalette;
+		}
+	}
+}