Tint icon textures upon loading

All downstream mods will now receive tinted icons, instead of only those
that permit KSP's DialogGUIBase.tint or Unity's Image.color

Source/KerbalTraitSetting.cs

@@ -15,12 +15,38 @@ public class KerbalTraitSetting
 		public KerbalTraitSetting(string name, Texture2D icon, Color color)
 		{
 			Name = name;
-			Icon = icon;
 			Color = color;
+
+			if (icon == null) return;
+
+			CTIAddon.log("Tinting icon for {0}.", name);
+			Icon = new Texture2D(icon.width, icon.height, TextureFormat.ARGB32, false);  // disable mipmap!
+			Color32[] tex;
+			try
+			{
+				// readable textures
+				tex = icon.GetPixels32();
+			}
+			catch (UnityException e)
+			{
+				// workaround for unreadable textures
+				RenderTexture bak = RenderTexture.active;
+				RenderTexture tmp = RenderTexture.GetTemporary(icon.width, icon.height, 0);
+				Graphics.Blit(icon, tmp);
+				RenderTexture.active = tmp;
+				Icon.ReadPixels(new Rect(0, 0, icon.width, icon.height), 0, 0);
+				RenderTexture.active = bak;
+				RenderTexture.ReleaseTemporary(tmp);
+				tex = Icon.GetPixels32();
+			}
+			for (int i = 0; i < tex.Length; i++)
+				tex[i] = tex[i] * Color;
+			Icon.SetPixels32(tex);
+			Icon.Apply(false,true);
 		}
 
 		#region Icon Generation
-		// Generate a Sprite of the icon for this trait. Note: not tinted with color.
+		// Generate a Sprite of the icon for this trait.
 		public Sprite makeSprite()
 		{
 			if (Icon == null) return null;
@@ -31,14 +57,14 @@ public Sprite makeSprite()
 		public DialogGUIImage makeDialogGUIImage(Vector2 s, Vector2 p)
 		{
 			if (Icon == null) return null;
-			return new DialogGUIImage(s,p,Color,Icon);
+			return new DialogGUIImage(s,p,Color.white,Icon);
 		}
 
 		// Generate a KSP DialogGUISprite of the icon for this trait.
 		public DialogGUISprite makeDialogGUISprite(Vector2 s, Vector2 p)
 		{
 			if (Icon == null) return null;
-			return new DialogGUISprite(s,p,Color,makeSprite());
+			return new DialogGUISprite(s,p,Color.white,makeSprite());
 		}
 
 		// Generate a GameObject with an Image component of the icon for this trait.
@@ -62,7 +88,6 @@ public bool attachImage(GameObject go)
 			if (Icon == null) return false;
 			Image i = go.AddComponent<Image>();
 			i.sprite = makeSprite();
-			i.color = Color;
 			return true;
 		}
 		#endregion Icon Generation