move water & light palette manips into ra

OpenRA.Mods.RA/WaterPaletteRotation.cs

@@ -0,0 +1,45 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using System.Drawing;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	class WaterPaletteRotationInfo : TraitInfo<WaterPaletteRotation> { }
+
+	class WaterPaletteRotation : ITick, IPaletteModifier
+	{
+		float t = 0;
+		public void Tick(Actor self)
+		{
+			t += .25f;
+		}
+
+		public void AdjustPalette(Bitmap b)
+		{
+			var rotate = (int)t % 7;
+			using (var bitmapCopy = new Bitmap(b))
+				for (int j = 0; j < b.Height; j++)
+					for (int i = 0; i < 7; i++)
+						b.SetPixel(0x60 + (rotate + i) % 7, j, bitmapCopy.GetPixel(0x60 + i, j));
+		}
+	}
+}