Move BackgroundModes to their own files.

osu.Game/GameModes/BackgroundMode.cs

@@ -8,7 +8,6 @@ using System.Text;
 using System.Threading.Tasks;
 using osu.Framework.GameModes;
 using osu.Framework.Graphics.Transformations;
-using osu.Game.Graphics.Background;
 using OpenTK;
 
 namespace osu.Game.GameModes
@@ -61,35 +60,4 @@ namespace osu.Game.GameModes
             base.OnResuming(last);
         }
     }
-
-    public class BackgroundModeDefault : BackgroundMode
-    {
-        public override void Load()
-        {
-            base.Load();
-
-            Add(new Background());
-        }
-    }
-
-    public class BackgroundModeCustom : BackgroundMode
-    {
-        private readonly string textureName;
-
-        public BackgroundModeCustom(string textureName)
-        {
-            this.textureName = textureName;
-        }
-
-        public override void Load()
-        {
-            base.Load();
-            Add(new Background(textureName));
-        }
-
-        public override bool Equals(BackgroundMode other)
-        {
-            return base.Equals(other) && textureName == ((BackgroundModeCustom)other).textureName;
-        }
-    }
 }

osu.Game/GameModes/Backgrounds/BackgroundModeCustom.cs

@@ -0,0 +1,28 @@
+//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
+//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Graphics.Background;
+
+namespace osu.Game.GameModes.Backgrounds
+{
+    public class BackgroundModeCustom : BackgroundMode
+    {
+        private readonly string textureName;
+
+        public BackgroundModeCustom(string textureName)
+        {
+            this.textureName = textureName;
+        }
+
+        public override void Load()
+        {
+            base.Load();
+            Add(new Background(textureName));
+        }
+
+        public override bool Equals(BackgroundMode other)
+        {
+            return base.Equals(other) && textureName == ((BackgroundModeCustom)other).textureName;
+        }
+    }
+}

osu.Game/GameModes/Backgrounds/BackgroundModeDefault.cs

@@ -0,0 +1,17 @@
+//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
+//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Graphics.Background;
+
+namespace osu.Game.GameModes.Backgrounds
+{
+    public class BackgroundModeDefault : BackgroundMode
+    {
+        public override void Load()
+        {
+            base.Load();
+
+            Add(new Background());
+        }
+    }
+}

osu.Game/GameModes/Backgrounds/BackgroundModeEmpty.cs

@@ -0,0 +1,10 @@
+//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
+//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+namespace osu.Game.GameModes.Backgrounds
+{
+    public class BackgroundModeEmpty : BackgroundMode
+    {
+
+    }
+}

osu.Game/GameModes/Edit/EditSongSelect.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using osu.Game.GameModes.Backgrounds;
 
 namespace osu.Game.GameModes.Edit
 {

osu.Game/GameModes/Edit/Editor.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using osu.Framework.GameModes;
+using osu.Game.GameModes.Backgrounds;
 using OpenTK.Graphics;
 
 namespace osu.Game.GameModes.Edit

osu.Game/GameModes/GameModeWhiteBox.cs

@@ -10,6 +10,7 @@ using osu.Framework.Graphics.Drawables;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.Transformations;
 using osu.Framework.Graphics.UserInterface;
+using osu.Game.GameModes.Backgrounds;
 using OpenTK;
 using OpenTK.Graphics;
 

osu.Game/GameModes/Menu/Intro.cs

@@ -5,11 +5,14 @@ using System;
 using osu.Framework.Audio.Sample;
 using osu.Framework.Audio.Track;
 using osu.Framework.GameModes;
+using osu.Game.GameModes.Backgrounds;
 
 namespace osu.Game.GameModes.Menu
 {
     class Intro : OsuGameMode
     {
+        protected override BackgroundMode CreateBackground() => new BackgroundModeEmpty();
+
         public override void Load()
         {
             base.Load();

osu.Game/GameModes/Menu/MainMenu.cs

@@ -7,6 +7,7 @@ using osu.Framework.GameModes;
 using osu.Framework.GameModes.Testing;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Transformations;
+using osu.Game.GameModes.Backgrounds;
 using osu.Game.GameModes.Charts;
 using osu.Game.GameModes.Direct;
 using osu.Game.GameModes.Edit;

osu.Game/GameModes/Multiplayer/Match.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using osu.Framework.GameModes;
+using osu.Game.GameModes.Backgrounds;
 using osu.Game.GameModes.Play;
 using OpenTK.Graphics;
 

osu.Game/GameModes/Multiplayer/MatchSongSelect.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using osu.Framework.GameModes;
+using osu.Game.GameModes.Backgrounds;
 using OpenTK.Graphics;
 
 namespace osu.Game.GameModes.Multiplayer

osu.Game/GameModes/Play/ModSelect.cs

@@ -8,6 +8,7 @@ using System.Text;
 using System.Threading.Tasks;
 using OpenTK.Graphics;
 using osu.Framework.GameModes;
+using osu.Game.GameModes.Backgrounds;
 
 namespace osu.Game.GameModes.Play
 {

osu.Game/GameModes/Play/PlaySongSelect.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using osu.Game.GameModes.Backgrounds;
 
 namespace osu.Game.GameModes.Play
 {

osu.Game/GameModes/Play/Results.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using osu.Framework.GameModes;
+using osu.Game.GameModes.Backgrounds;
 using OpenTK.Graphics;
 
 namespace osu.Game.GameModes.Play

osu.Game/osu.Game.csproj

@@ -70,6 +70,9 @@
     <Compile Include="Beatmaps\Timing\TimingChange.cs" />
     <Compile Include="Configuration\OsuConfigManager.cs" />
     <Compile Include="GameModes\BackgroundMode.cs" />
+    <Compile Include="GameModes\Backgrounds\BackgroundModeCustom.cs" />
+    <Compile Include="GameModes\Backgrounds\BackgroundModeDefault.cs" />
+    <Compile Include="GameModes\Backgrounds\BackgroundModeEmpty.cs" />
     <Compile Include="GameModes\Charts\ChartInfo.cs" />
     <Compile Include="GameModes\Edit\Editor.cs" />
     <Compile Include="GameModes\GameModeWhiteBox.cs" />