Add initial support for spinner disc skinning

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSpinner.cs

@@ -175,8 +175,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             Background.AccentColour = normalColour;
             Ticks.AccentColour = normalColour;
-
             Disc.AccentColour = fillColour;
+
             circle.Colour = colours.BlueDark;
             glow.Colour = colours.BlueDark;
 

osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/SpinnerDisc.cs

@@ -9,6 +9,7 @@ using osu.Game.Graphics;
 using osuTK;
 using osuTK.Graphics;
 using osu.Framework.Utils;
+using osu.Game.Skinning;
 
 namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 {
@@ -16,13 +17,20 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
     {
         private readonly Spinner spinner;
 
+        private Color4 accentColour;
+
         public Color4 AccentColour
         {
-            get => background.AccentColour;
-            set => background.AccentColour = value;
+            get => accentColour;
+            set
+            {
+                accentColour = value;
+                if (background.Drawable is IHasAccentColour accent)
+                    accent.AccentColour = value;
+            }
         }
 
-        private readonly SpinnerBackground background;
+        private readonly SkinnableDrawable background;
 
         private const float idle_alpha = 0.2f;
         private const float tracking_alpha = 0.4f;
@@ -37,7 +45,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 
             Children = new Drawable[]
             {
-                background = new SpinnerBackground { Alpha = idle_alpha },
+                background = new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.SpinnerDisc), _ => new SpinnerBackground { Alpha = idle_alpha }),
             };
         }
 
@@ -54,7 +62,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 
                 tracking = value;
 
-                background.FadeTo(tracking ? tracking_alpha : idle_alpha, 100);
+                // todo: new default only
+                background.Drawable.FadeTo(tracking ? tracking_alpha : idle_alpha, 100);
             }
         }
 
@@ -121,8 +130,9 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 
             if (Complete && updateCompleteTick())
             {
-                background.FinishTransforms(false, nameof(Alpha));
-                background
+                // todo: new default only
+                background.Drawable.FinishTransforms(false, nameof(Alpha));
+                background.Drawable
                           .FadeTo(tracking_alpha + 0.2f, 60, Easing.OutExpo)
                           .Then()
                           .FadeTo(tracking_alpha, 250, Easing.OutQuint);

osu.Game.Rulesets.Osu/OsuSkinComponents.cs

@@ -17,5 +17,6 @@ namespace osu.Game.Rulesets.Osu
         SliderFollowCircle,
         SliderBall,
         SliderBody,
+        SpinnerDisc
     }
 }

osu.Game.Rulesets.Osu/Skinning/OsuLegacySkinTransformer.cs

@@ -4,6 +4,7 @@
 using System;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Sprites;
 using osu.Game.Skinning;
 using osuTK;
 
@@ -102,6 +103,14 @@ namespace osu.Game.Rulesets.Osu.Skinning
                             Scale = new Vector2(0.8f),
                             Spacing = new Vector2(-overlap, 0)
                         };
+
+                case OsuSkinComponents.SpinnerDisc:
+                    if (Source.GetTexture("spinner-background") != null)
+                        return new Sprite { Texture = Source.GetTexture("spinner-circle") };
+                    else if (Source.GetTexture("spinner-top") != null)
+                        return new Sprite { Texture = Source.GetTexture("spinner-top") };
+
+                    return null;
             }
 
             return null;