Replace GlobalLightingPaletteEffect with a post-processing shader.

OpenRA.Mods.Common/Traits/PaletteEffects/TintPostProcessEffect.cs

@@ -0,0 +1,51 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Used for day/night effects.")]
+	[TraitLocation(SystemActors.World | SystemActors.EditorWorld)]
+	public class TintPostProcessEffectInfo : TraitInfo, ILobbyCustomRulesIgnore
+	{
+		public readonly float Red = 1f;
+		public readonly float Green = 1f;
+		public readonly float Blue = 1f;
+		public readonly float Ambient = 1f;
+
+		public override object Create(ActorInitializer init) { return new TintPostProcessEffect(this); }
+	}
+
+	public class TintPostProcessEffect : RenderPostProcessPassBase
+	{
+		public float Red;
+		public float Green;
+		public float Blue;
+		public float Ambient;
+
+		public TintPostProcessEffect(TintPostProcessEffectInfo info)
+			: base("tint", PostProcessPassType.AfterActors)
+		{
+			Red = info.Red;
+			Green = info.Green;
+			Blue = info.Blue;
+			Ambient = info.Ambient;
+		}
+
+		protected override bool Enabled => true;
+		protected override void PrepareRender(WorldRenderer wr, IShader shader)
+		{
+			shader.SetVec("Tint", Ambient * Red, Ambient * Green, Ambient * Blue);
+		}
+	}
+}