Move TmpRA sprite loading into Mods.Common.

OpenRA.Mods.Common/SpriteLoaders/TmpRALoader.cs

@@ -0,0 +1,102 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 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.IO;
+using System.Linq;
+using OpenRA.FileFormats;
+using OpenRA.Graphics;
+
+namespace OpenRA.Mods.Common.SpriteLoaders
+{
+	public class TmpRALoader : ISpriteLoader
+	{
+		class TmpRAFrame : 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 bool DisableExportPadding { get { return false; } }
+
+			public TmpRAFrame(byte[] data, Size size)
+			{
+				FrameSize = size;
+				Data = data;
+
+				if (data == null)
+					Data = new byte[0];
+				else
+					Size = size;
+			}
+		}
+
+		bool IsTmpRA(Stream s)
+		{
+			var start = s.Position;
+
+			s.Position += 20;
+			var a = s.ReadUInt32();
+			s.Position += 2;
+			var b = s.ReadUInt16();
+
+			s.Position = start;
+			return a == 0 && b == 0x2c73;
+		}
+
+		TmpRAFrame[] ParseFrames(Stream s)
+		{
+			var start = s.Position;
+			var width = s.ReadUInt16();
+			var height = s.ReadUInt16();
+			var size = new Size(width, height);
+
+			s.Position += 12;
+			var imgStart = s.ReadUInt32();
+			s.Position += 8;
+			var indexEnd = s.ReadInt32();
+			s.Position += 4;
+			var indexStart = s.ReadInt32();
+
+			s.Position = indexStart;
+			var count = indexEnd - indexStart;
+			var tiles = new TmpRAFrame[count];
+
+			var tilesIndex = 0;
+			foreach (var b in s.ReadBytes(count))
+			{
+				if (b != 255)
+				{
+					s.Position = imgStart + b * width * height;
+					tiles[tilesIndex++] = new TmpRAFrame(s.ReadBytes(width * height), size);
+				}
+				else
+					tiles[tilesIndex++] = new TmpRAFrame(null, size);
+			}
+
+			s.Position = start;
+			return tiles;
+		}
+
+		public bool TryParseSprite(Stream s, out ISpriteFrame[] frames)
+		{
+			if (!IsTmpRA(s))
+			{
+				frames = null;
+				return false;
+			}
+
+			frames = ParseFrames(s);
+			return true;
+		}
+	}
+}