Add a black&white palettemod

OpenRA.Mods.RA/DesaturatedPaletteEffect.cs

@@ -0,0 +1,40 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2011 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 OpenRA.FileFormats;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	class DesaturatedPaletteEffectInfo : TraitInfo<DesaturatedPaletteEffect> { }
+
+	public class DesaturatedPaletteEffect : IPaletteModifier
+	{
+		// Doing this every frame is stupid
+		public void AdjustPalette(Dictionary<string,Palette> palettes)
+		{
+			var excludePalettes = new List<string>(){"cursor", "chrome", "colorpicker", "shroud", "fog"};
+			foreach (var pal in palettes)
+			{
+				if (excludePalettes.Contains(pal.Key))
+					continue;
+				
+				for (var x = 0; x < 256; x++)
+				{
+					var orig = pal.Value.GetColor(x);
+					var lum = (int)(255 * orig.GetBrightness());
+					pal.Value.SetColor(x, Color.FromArgb(orig.A, lum, lum, lum));
+				}
+			}
+		}
+	}
+}

OpenRA.Mods.RA/OpenRA.Mods.RA.csproj

@@ -347,6 +347,7 @@
     <Compile Include="Sellable.cs" />
     <Compile Include="Captures.cs" />
     <Compile Include="Activities\CaptureActor.cs" />
+    <Compile Include="DesaturatedPaletteEffect.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\OpenRA.FileFormats\OpenRA.FileFormats.csproj">

mods/cnc/maps/shellmap/map.yaml

@@ -1013,6 +1013,7 @@ Rules:
 		-MPStartLocations:
 		-CrateSpawner:
 		CncShellmapScript:
+		DesaturatedPaletteEffect:
 	LST:
 		Mobile:
 			Speed: 3