Add IndexedPlayerPalette for original campaign colors.

OpenRA.Game/OpenRA.Game.csproj

@@ -252,6 +252,7 @@
     <Compile Include="GlobalChat.cs" />
     <Compile Include="Primitives\ObservableList.cs" />
     <Compile Include="Graphics\RgbaColorRenderer.cs" />
+    <Compile Include="Traits\Player\IndexedPlayerPalette.cs" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="FileSystem\D2kSoundResources.cs" />

OpenRA.Game/Traits/Player/IndexedPlayerPalette.cs

@@ -0,0 +1,91 @@
+#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.Collections.Generic;
+using System.Drawing;
+using System.IO;
+using OpenRA.Graphics;
+
+namespace OpenRA.Traits
+{
+	[Desc("Define a player palette by swapping palette indices.")]
+	public class IndexedPlayerPaletteInfo : ITraitInfo, IRulesetLoaded
+	{
+		[Desc("The name of the palette to base off.")]
+		[PaletteReference] public readonly string BasePalette = null;
+
+		[Desc("The prefix for the resulting player palettes")]
+		[PaletteDefinition(true)] public readonly string BaseName = "player";
+
+		[Desc("Remap these indices to player colors.")]
+		public readonly int[] RemapIndex = { };
+
+		[Desc("Allow palette modifiers to change the palette.")]
+		public readonly bool AllowModifiers = true;
+
+		public readonly Dictionary<string, int[]> PlayerIndex;
+
+		public object Create(ActorInitializer init) { return new IndexedPlayerPalette(this); }
+
+		public void RulesetLoaded(Ruleset rules, ActorInfo ai)
+		{
+			foreach (var p in PlayerIndex)
+				if (p.Value.Length != RemapIndex.Length)
+					throw new YamlException("PlayerIndex for player `{0}` length does not match RemapIndex!".F(p.Key));
+		}
+	}
+
+	public class IndexedPlayerPalette : ILoadsPlayerPalettes
+	{
+		readonly IndexedPlayerPaletteInfo info;
+
+		public IndexedPlayerPalette(IndexedPlayerPaletteInfo info)
+		{
+			this.info = info;
+		}
+
+		public void LoadPlayerPalettes(WorldRenderer wr, string playerName, HSLColor color, bool replaceExisting)
+		{
+			var basePalette = wr.Palette(info.BasePalette).Palette;
+			ImmutablePalette pal;
+			int[] remap;
+
+			if (info.PlayerIndex.TryGetValue(playerName, out remap))
+				pal = new ImmutablePalette(basePalette, new IndexedColorRemap(basePalette, info.RemapIndex, remap));
+			else
+				pal = new ImmutablePalette(basePalette);
+
+			wr.AddPalette(info.BaseName + playerName, pal, info.AllowModifiers, replaceExisting);
+		}
+	}
+
+	public class IndexedColorRemap : IPaletteRemap
+	{
+		Dictionary<int, int> replacements = new Dictionary<int, int>();
+		IPalette basePalette;
+
+		public IndexedColorRemap(IPalette basePalette, int[] ramp, int[] remap)
+		{
+			this.basePalette = basePalette;
+			if (ramp.Length != remap.Length)
+				throw new InvalidDataException("ramp and remap lengths do no match.");
+
+			for (var i = 0; i < ramp.Length; i++)
+				replacements[ramp[i]] = remap[i];
+		}
+
+		public Color GetRemappedColor(Color original, int index)
+		{
+			int c;
+			return replacements.TryGetValue(index, out c)
+				? basePalette.GetColor(c) : original;
+		}
+	}
+}