Add animation support for legacy osu!mania column lights

osu.Game.Rulesets.Mania.Tests/Resources/special-skin/skin.ini

@@ -4,6 +4,7 @@ Version: 2.5
 [Mania]
 Keys: 4
 ColumnLineWidth: 3,1,3,1,1
+LightFramePerSecond: 15
 // some skins found in the wild had configuration keys where the @2x suffix was included in the values.
 // the expected compatibility behaviour is that the presence of the @2x suffix shouldn't change anything
 // if @2x assets are present.
@@ -15,5 +16,6 @@ Hit300: mania/hit300@2x
 Hit300g: mania/hit300g@2x
 StageLeft: mania/stage-left
 StageRight: mania/stage-right
+StageLight: mania/stage-light
 NoteImage0L: LongNoteTailWang
 NoteImage1L: LongNoteTailWang

osu.Game.Rulesets.Mania/Skinning/Legacy/LegacyColumnBackground.cs

@@ -5,7 +5,6 @@ using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
-using osu.Framework.Graphics.Sprites;
 using osu.Framework.Input.Bindings;
 using osu.Framework.Input.Events;
 using osu.Game.Rulesets.UI.Scrolling;
@@ -20,7 +19,7 @@ namespace osu.Game.Rulesets.Mania.Skinning.Legacy
         private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
 
         private Container lightContainer = null!;
-        private Sprite light = null!;
+        private Drawable? light = null!;
 
         public LegacyColumnBackground()
         {
@@ -39,6 +38,8 @@ namespace osu.Game.Rulesets.Mania.Skinning.Legacy
             Color4 lightColour = GetColumnSkinConfig<Color4>(skin, LegacyManiaSkinConfigurationLookups.ColumnLightColour)?.Value
                                  ?? Color4.White;
 
+            int lightFramePerSecond = skin.GetManiaSkinConfig<int>(LegacyManiaSkinConfigurationLookups.LightFramePerSecond)?.Value ?? 60;
+
             InternalChildren = new[]
             {
                 lightContainer = new Container
@@ -46,16 +47,15 @@ namespace osu.Game.Rulesets.Mania.Skinning.Legacy
                     Origin = Anchor.BottomCentre,
                     RelativeSizeAxes = Axes.Both,
                     Padding = new MarginPadding { Bottom = lightPosition },
-                    Child = light = new Sprite
+                    Child = light = skin.GetAnimation(lightImage, true, true, frameLength: 1000d / lightFramePerSecond)?.With(l =>
                     {
-                        Anchor = Anchor.BottomCentre,
-                        Origin = Anchor.BottomCentre,
-                        Colour = LegacyColourCompatibility.DisallowZeroAlpha(lightColour),
-                        Texture = skin.GetTexture(lightImage),
-                        RelativeSizeAxes = Axes.X,
-                        Width = 1,
-                        Alpha = 0
-                    }
+                        l.Anchor = Anchor.BottomCentre;
+                        l.Origin = Anchor.BottomCentre;
+                        l.Colour = LegacyColourCompatibility.DisallowZeroAlpha(lightColour);
+                        l.RelativeSizeAxes = Axes.X;
+                        l.Width = 1;
+                        l.Alpha = 0;
+                    }) ?? Empty(),
                 }
             };
 

osu.Game/Skinning/LegacyManiaSkinConfiguration.cs

@@ -40,6 +40,7 @@ namespace osu.Game.Skinning
         public float ScorePosition = 300 * POSITION_SCALE_FACTOR;
         public bool ShowJudgementLine = true;
         public bool KeysUnderNotes;
+        public int LightFramePerSecond = 60;
 
         public LegacyNoteBodyStyle? NoteBodyStyle;
 

osu.Game/Skinning/LegacyManiaSkinConfigurationLookup.cs

@@ -74,6 +74,7 @@ namespace osu.Game.Skinning
         Hit50,
         Hit0,
         KeysUnderNotes,
-        NoteBodyStyle
+        NoteBodyStyle,
+        LightFramePerSecond
     }
 }

osu.Game/Skinning/LegacyManiaSkinDecoder.cs

@@ -123,6 +123,11 @@ namespace osu.Game.Skinning
                         currentConfig.WidthForNoteHeightScale = (float.Parse(pair.Value, CultureInfo.InvariantCulture)) * LegacyManiaSkinConfiguration.POSITION_SCALE_FACTOR;
                         break;
 
+                    case "LightFramePerSecond":
+                        int lightFramePerSecond = int.Parse(pair.Value, CultureInfo.InvariantCulture);
+                        currentConfig.LightFramePerSecond = lightFramePerSecond > 0 ? lightFramePerSecond : 24;
+                        break;
+
                     case string when pair.Key.StartsWith("Colour", StringComparison.Ordinal):
                         HandleColours(currentConfig, line, true);
                         break;

osu.Game/Skinning/LegacySkin.cs

@@ -273,6 +273,9 @@ namespace osu.Game.Skinning
 
                 case LegacyManiaSkinConfigurationLookups.KeysUnderNotes:
                     return SkinUtils.As<TValue>(new Bindable<bool>(existing.KeysUnderNotes));
+
+                case LegacyManiaSkinConfigurationLookups.LightFramePerSecond:
+                    return SkinUtils.As<TValue>(new Bindable<int>(existing.LightFramePerSecond));
             }
 
             return null;