Rewrite taiko playfield adjustment container to keep height constant

osu.Game.Rulesets.Taiko/UI/TaikoPlayfieldAdjustmentContainer.cs

@@ -5,23 +5,31 @@
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.UI;
+using osuTK;
 
 namespace osu.Game.Rulesets.Taiko.UI
 {
     public partial class TaikoPlayfieldAdjustmentContainer : PlayfieldAdjustmentContainer
     {
-        private const float default_relative_height = TaikoPlayfield.DEFAULT_HEIGHT / 768;
-
         public const float MAXIMUM_ASPECT = 16f / 9f;
         public const float MINIMUM_ASPECT = 5f / 4f;
 
         public readonly IBindable<bool> LockPlayfieldAspectRange = new BindableBool(true);
 
+        public TaikoPlayfieldAdjustmentContainer()
+        {
+            RelativeSizeAxes = Axes.X;
+            RelativePositionAxes = Axes.Y;
+            Height = TaikoPlayfield.BASE_HEIGHT;
+        }
+
         protected override void Update()
         {
             base.Update();
 
-            float height = default_relative_height;
+            const float base_relative_height = TaikoPlayfield.BASE_HEIGHT / 768;
+
+            float relativeHeight = base_relative_height;
 
             // Players coming from stable expect to be able to change the aspect ratio regardless of the window size.
             // We originally wanted to limit this more, but there was considerable pushback from the community.
@@ -33,19 +41,20 @@ protected override void Update()
                 float currentAspect = Parent!.ChildSize.X / Parent!.ChildSize.Y;
 
                 if (currentAspect > MAXIMUM_ASPECT)
-                    height *= currentAspect / MAXIMUM_ASPECT;
+                    relativeHeight *= currentAspect / MAXIMUM_ASPECT;
                 else if (currentAspect < MINIMUM_ASPECT)
-                    height *= currentAspect / MINIMUM_ASPECT;
+                    relativeHeight *= currentAspect / MINIMUM_ASPECT;
             }
 
             // Limit the maximum relative height of the playfield to one-third of available area to avoid it masking out on extreme resolutions.
-            height = Math.Min(height, 1f / 3f);
-            Height = height;
+            relativeHeight = Math.Min(relativeHeight, 1f / 3f);
 
             // Position the taiko playfield exactly one playfield from the top of the screen, if there is enough space for it.
             // Note that the relative height cannot exceed one-third - if that limit is hit, the playfield will be exactly centered.
-            RelativePositionAxes = Axes.Y;
-            Y = height;
+            Y = relativeHeight;
+
+            Scale = new Vector2(Math.Max(relativeHeight / base_relative_height, 1f));
+            Width = 1 / Scale.X;
         }
     }
 }