shroud: it works. perf is pretty ugly, and there are a lot of small bugs.

OpenRa.FileFormats/IPaletteRemap.cs

@@ -0,0 +1,9 @@
+using System;
+using System.Drawing;
+namespace OpenRa.FileFormats
+{
+	public interface IPaletteRemap
+	{
+		Color GetRemappedColor(Color original, int index);
+	}
+}

OpenRa.FileFormats/OpenRa.FileFormats.csproj

@@ -55,6 +55,7 @@
     <Compile Include="Format80.cs" />
     <Compile Include="IniFile.cs" />
     <Compile Include="IniWriter.cs" />
+    <Compile Include="IPaletteRemap.cs" />
     <Compile Include="Map.cs" />
     <Compile Include="PackageEntry.cs" />
     <Compile Include="Package.cs" />
@@ -62,6 +63,7 @@
     <Compile Include="PaletteRemap.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="ShpReader.cs" />
+    <Compile Include="ShroudPaletteRemap.cs" />
     <Compile Include="Terrain.cs" />
     <Compile Include="TileReference.cs" />
     <Compile Include="TileSet.cs" />

OpenRa.FileFormats/Palette.cs

@@ -31,7 +31,7 @@ namespace OpenRa.FileFormats
 			colors[4] = Color.FromArgb(140, 0, 0, 0);
 		}
 
-		public Palette(Palette p, PaletteRemap r)
+		public Palette(Palette p, IPaletteRemap r)
 		{
 			for (int i = 0; i < 256; i++)
 				colors.Add(r.GetRemappedColor(p.GetColor(i), i));

OpenRa.FileFormats/PaletteRemap.cs

@@ -4,7 +4,7 @@ using System.IO;
 
 namespace OpenRa.FileFormats
 {
-	public class PaletteRemap
+	public class PaletteRemap : IPaletteRemap
 	{
 		int offset;
 		List<Color> remapColors = new List<Color>();

OpenRa.FileFormats/ShroudPaletteRemap.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Drawing;
+
+namespace OpenRa.FileFormats
+{
+	public class ShroudPaletteRemap : IPaletteRemap
+	{
+		public Color GetRemappedColor(Color original, int index)
+		{
+			// false-color version for debug
+
+			//return new[] { 
+			//    Color.Orange, Color.Green, 
+			//    Color.Blue, Color.Yellow, 
+			//    Color.Black, 
+			//    Color.Red, 
+			//    Color.Purple, 
+			//    Color.Cyan}[index % 8];
+
+			return new[] { 
+			    Color.Transparent, Color.Green, 
+			    Color.Blue, Color.Yellow, 
+			    Color.Black, 
+			    Color.FromArgb(192,0,0,0), 
+			    Color.FromArgb(128,0,0,0), 
+			    Color.FromArgb(64,0,0,0)}[index % 8];
+		}
+	}
+}