Add some skin transformers.

osu.Game.Rulesets.Karaoke/KaraokeRuleset.cs

@@ -31,7 +31,9 @@
 using osu.Game.Rulesets.Karaoke.Replays;
 using osu.Game.Rulesets.Karaoke.Resources;
 using osu.Game.Rulesets.Karaoke.Scoring;
+using osu.Game.Rulesets.Karaoke.Skinning.Argon;
 using osu.Game.Rulesets.Karaoke.Skinning.Legacy;
+using osu.Game.Rulesets.Karaoke.Skinning.Triangles;
 using osu.Game.Rulesets.Karaoke.Statistics;
 using osu.Game.Rulesets.Karaoke.UI;
 using osu.Game.Rulesets.Mods;
@@ -193,8 +195,22 @@ public override IResourceStore<byte[]> CreateResourceStore()
 
         public override ISkin CreateSkinTransformer(ISkin skin, IBeatmap beatmap)
         {
-            // always return the legacy skin for now until have skin for karaoke.
-            return new KaraokeLegacySkinTransformer(skin, beatmap);
+            switch (skin)
+            {
+                case TrianglesSkin:
+                    return new KaraokeTrianglesSkinTransformer(skin, beatmap);
+
+                case ArgonSkin:
+                    return new KaraokeArgonSkinTransformer(skin, beatmap);
+
+                case DefaultLegacySkin:
+                    return new KaraokeClassicSkinTransformer(skin, beatmap);
+
+                case LegacySkin:
+                    return new KaraokeLegacySkinTransformer(skin, beatmap);
+            }
+
+            return null;
         }
 
         public override IConvertibleReplayFrame CreateConvertibleReplayFrame() => new KaraokeReplayFrame();

osu.Game.Rulesets.Karaoke/Skinning/Argon/KaraokeArgonSkinTransformer.cs

@@ -0,0 +1,17 @@
+// Copyright (c) andy840119 <[email protected]>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Karaoke.Skinning.Default;
+using osu.Game.Skinning;
+
+namespace osu.Game.Rulesets.Karaoke.Skinning.Argon
+{
+    public class KaraokeArgonSkinTransformer : KaraokeDefaultSkinTransformer
+    {
+        public KaraokeArgonSkinTransformer(ISkin skin, IBeatmap beatmap)
+            : base(skin, beatmap)
+        {
+        }
+    }
+}

osu.Game.Rulesets.Karaoke/Skinning/Default/KaraokeDefaultSkinTransformer.cs

@@ -0,0 +1,23 @@
+// Copyright (c) andy840119 <[email protected]>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Bindables;
+using osu.Game.Beatmaps;
+using osu.Game.Skinning;
+
+namespace osu.Game.Rulesets.Karaoke.Skinning.Default
+{
+    public class KaraokeDefaultSkinTransformer : SkinTransformer
+    {
+        private readonly KaraokeSkin karaokeSkin;
+
+        public KaraokeDefaultSkinTransformer(ISkin skin, IBeatmap beatmap)
+            : base(skin)
+        {
+            karaokeSkin = new KaraokeSkin(new SkinInfo(), new InternalSkinStorageResourceProvider("Default"));
+        }
+
+        public override IBindable<TValue>? GetConfig<TLookup, TValue>(TLookup lookup)
+            => karaokeSkin.GetConfig<TLookup, TValue>(lookup);
+    }
+}

osu.Game.Rulesets.Karaoke/Skinning/Legacy/KaraokeClassicSkinTransformer.cs

@@ -0,0 +1,16 @@
+// Copyright (c) andy840119 <[email protected]>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Beatmaps;
+using osu.Game.Skinning;
+
+namespace osu.Game.Rulesets.Karaoke.Skinning.Legacy
+{
+    public class KaraokeClassicSkinTransformer : KaraokeLegacySkinTransformer
+    {
+        public KaraokeClassicSkinTransformer(ISkin source, IBeatmap beatmap)
+            : base(source, beatmap)
+        {
+        }
+    }
+}

osu.Game.Rulesets.Karaoke/Skinning/Triangles/KaraokeTrianglesSkinTransformer.cs

@@ -0,0 +1,17 @@
+// Copyright (c) andy840119 <[email protected]>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Karaoke.Skinning.Default;
+using osu.Game.Skinning;
+
+namespace osu.Game.Rulesets.Karaoke.Skinning.Triangles
+{
+    public class KaraokeTrianglesSkinTransformer : KaraokeDefaultSkinTransformer
+    {
+        public KaraokeTrianglesSkinTransformer(ISkin skin, IBeatmap beatmap)
+            : base(skin, beatmap)
+        {
+        }
+    }
+}