Make terrain tiles ISpriteSources.

OpenRA.FileFormats/Graphics/TmpTDReader.cs

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+#region Copyright & License Information
+/*
+ * Copyright 2007-2013 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.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.IO;
+
+namespace OpenRA.FileFormats
+{
+	public class TmpTile : ISpriteFrame
+	{
+		public Size Size { get; private set; }
+		public Size FrameSize { get; private set; }
+		public float2 Offset { get { return float2.Zero; } }
+		public byte[] Data { get; set; }
+
+		public TmpTile(byte[] data, Size size)
+		{
+			FrameSize = size;
+			Data = data;
+
+			if (data == null)
+				Data = new byte[0];
+			else
+				Size = size;
+		}
+	}
+
+	public class TmpTDReader : ISpriteSource
+	{
+		readonly List<TmpTile> tiles = new List<TmpTile>();
+		public IEnumerable<ISpriteFrame> Frames { get { return tiles.Cast<ISpriteFrame>(); } }
+
+		public TmpTDReader(Stream s)
+		{
+			var width = s.ReadUInt16();
+			var height = s.ReadUInt16();
+			var size = new Size(width, height);
+
+			s.Position += 8;
+			var imgStart = s.ReadUInt32();
+			s.Position += 8;
+			var indexEnd = s.ReadInt32();
+			var indexStart = s.ReadInt32();
+
+			s.Position = indexStart;
+			foreach (byte b in s.ReadBytes(indexEnd - indexStart))
+			{
+				if (b != 255)
+				{
+					s.Position = imgStart + b * width * height;
+					tiles.Add(new TmpTile(s.ReadBytes(width * height), size));
+				}
+				else
+					tiles.Add(new TmpTile(null, size));
+			}
+		}
+	}
+}