Rewrite osu!taiko playfield adjustment container to keep playfield height constant

osu.Game.Rulesets.Taiko.Tests/Skinning/TestSceneTaikoPlayfield.cs

@@ -1,17 +1,19 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using System;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Extensions.IEnumerableExtensions;
+using osu.Framework.Extensions.ObjectExtensions;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
 using osu.Framework.Testing;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets.Taiko.Beatmaps;
 using osu.Game.Rulesets.Taiko.UI;
 using osu.Game.Rulesets.UI.Scrolling;
 using osu.Game.Tests.Visual;
+using osuTK;
 
 namespace osu.Game.Rulesets.Taiko.Tests.Skinning
 {
@@ -37,11 +39,14 @@ public void SetUpSteps()
                 Beatmap.Value.Track.Start();
             });
 
-            AddStep("Load playfield", () => SetContents(_ => new TaikoPlayfield
+            AddStep("Load playfield", () => SetContents(_ => new Container
             {
-                Height = 0.2f,
                 Anchor = Anchor.CentreLeft,
                 Origin = Anchor.CentreLeft,
+                RelativeSizeAxes = Axes.Both,
+                Size = new Vector2(2f, 1f),
+                Scale = new Vector2(0.5f),
+                Child = new TaikoPlayfieldAdjustmentContainer { Child = new TaikoPlayfield() },
             }));
         }
 
@@ -54,7 +59,20 @@ public void TestBasic()
         [Test]
         public void TestHeightChanges()
         {
-            AddRepeatStep("change height", () => this.ChildrenOfType<TaikoPlayfield>().ForEach(p => p.Height = Math.Max(0.2f, (p.Height + 0.2f) % 1f)), 50);
+            int value = 0;
+
+            AddRepeatStep("change height", () =>
+            {
+                value = (value + 1) % 5;
+
+                this.ChildrenOfType<TaikoPlayfieldAdjustmentContainer>().ForEach(p =>
+                {
+                    var parent = (Container)p.Parent.AsNonNull();
+                    parent.Scale = new Vector2(0.5f + 0.1f * value);
+                    parent.Width = 1f / parent.Scale.X;
+                    parent.Height = 0.5f / parent.Scale.Y;
+                });
+            }, 50);
         }
 
         [Test]

osu.Game.Rulesets.Taiko/Edit/Blueprints/HitPlacementBlueprint.cs

@@ -21,7 +21,7 @@ public HitPlacementBlueprint()
         {
             InternalChild = piece = new HitPiece
             {
-                Size = new Vector2(TaikoHitObject.DEFAULT_SIZE * TaikoPlayfield.DEFAULT_HEIGHT)
+                Size = new Vector2(TaikoHitObject.DEFAULT_SIZE * TaikoPlayfield.BASE_HEIGHT)
             };
         }
 

osu.Game.Rulesets.Taiko/Edit/Blueprints/TaikoSpanPlacementBlueprint.cs

@@ -39,15 +39,15 @@ public TaikoSpanPlacementBlueprint(HitObject hitObject)
             {
                 headPiece = new HitPiece
                 {
-                    Size = new Vector2(TaikoHitObject.DEFAULT_SIZE * TaikoPlayfield.DEFAULT_HEIGHT)
+                    Size = new Vector2(TaikoHitObject.DEFAULT_SIZE * TaikoPlayfield.BASE_HEIGHT)
                 },
                 lengthPiece = new LengthPiece
                 {
-                    Height = TaikoHitObject.DEFAULT_SIZE * TaikoPlayfield.DEFAULT_HEIGHT
+                    Height = TaikoHitObject.DEFAULT_SIZE * TaikoPlayfield.BASE_HEIGHT
                 },
                 tailPiece = new HitPiece
                 {
-                    Size = new Vector2(TaikoHitObject.DEFAULT_SIZE * TaikoPlayfield.DEFAULT_HEIGHT)
+                    Size = new Vector2(TaikoHitObject.DEFAULT_SIZE * TaikoPlayfield.BASE_HEIGHT)
                 }
             };
         }

osu.Game.Rulesets.Taiko/Mods/TaikoModFlashlight.cs

@@ -63,7 +63,7 @@ public TaikoFlashlight(TaikoModFlashlight modFlashlight, TaikoPlayfield taikoPla
             /// </param>
             private Vector2 adjustSizeForPlayfieldAspectRatio(float size)
             {
-                return new Vector2(0, size * taikoPlayfield.DrawHeight / TaikoPlayfield.DEFAULT_HEIGHT);
+                return new Vector2(0, size * taikoPlayfield.Parent!.Scale.Y);
             }
 
             protected override void UpdateFlashlightSize(float size)

osu.Game.Rulesets.Taiko/Skinning/Legacy/TaikoLegacyHitTarget.cs

@@ -5,55 +5,37 @@
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
-using osu.Game.Rulesets.Taiko.UI;
 using osu.Game.Skinning;
 using osuTK;
 
 namespace osu.Game.Rulesets.Taiko.Skinning.Legacy
 {
     public partial class TaikoLegacyHitTarget : CompositeDrawable
     {
-        private Container content = null!;
-
         [BackgroundDependencyLoader]
         private void load(ISkinSource skin)
         {
             RelativeSizeAxes = Axes.Both;
 
-            InternalChild = content = new Container
+            InternalChildren = new Drawable[]
             {
-                RelativeSizeAxes = Axes.Both,
-                Anchor = Anchor.Centre,
-                Origin = Anchor.Centre,
-                Children = new Drawable[]
+                new Sprite
+                {
+                    Texture = skin.GetTexture("approachcircle"),
+                    Scale = new Vector2(0.83f),
+                    Alpha = 0.47f, // eyeballed to match stable
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
+                new Sprite
                 {
-                    new Sprite
-                    {
-                        Texture = skin.GetTexture("approachcircle"),
-                        Scale = new Vector2(0.83f),
-                        Alpha = 0.47f, // eyeballed to match stable
-                        Anchor = Anchor.Centre,
-                        Origin = Anchor.Centre,
-                    },
-                    new Sprite
-                    {
-                        Texture = skin.GetTexture("taikobigcircle"),
-                        Scale = new Vector2(0.8f),
-                        Alpha = 0.22f, // eyeballed to match stable
-                        Anchor = Anchor.Centre,
-                        Origin = Anchor.Centre,
-                    },
-                }
+                    Texture = skin.GetTexture("taikobigcircle"),
+                    Scale = new Vector2(0.8f),
+                    Alpha = 0.22f, // eyeballed to match stable
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
             };
         }
-
-        protected override void Update()
-        {
-            base.Update();
-
-            // Relying on RelativeSizeAxes.Both + FillMode.Fit doesn't work due to the precise pixel layout requirements.
-            // This is a bit ugly but makes the non-legacy implementations a lot cleaner to implement.
-            content.Scale = new Vector2(DrawHeight / TaikoPlayfield.DEFAULT_HEIGHT);
-        }
     }
 }

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

@@ -21,16 +21,15 @@
 using osu.Game.Rulesets.Taiko.Objects;
 using osu.Game.Rulesets.Taiko.Scoring;
 using osu.Game.Skinning;
-using osuTK;
 
 namespace osu.Game.Rulesets.Taiko.UI
 {
     public partial class TaikoPlayfield : ScrollingPlayfield
     {
         /// <summary>
-        /// Default height of a <see cref="TaikoPlayfield"/> when inside a <see cref="DrawableTaikoRuleset"/>.
+        /// Base height of a <see cref="TaikoPlayfield"/> when inside a <see cref="DrawableTaikoRuleset"/>.
         /// </summary>
-        public const float DEFAULT_HEIGHT = 200;
+        public const float BASE_HEIGHT = 200;
 
         /// <summary>
         /// Whether the hit target should be nudged further towards the left area, matching the stable "classic" position.
@@ -44,7 +43,6 @@ public partial class TaikoPlayfield : ScrollingPlayfield
         private JudgementContainer<DrawableTaikoJudgement> judgementContainer = null!;
         private ScrollingHitObjectContainer drumRollHitContainer = null!;
         internal Drawable HitTarget = null!;
-        private SkinnableDrawable mascot = null!;
 
         private JudgementPooler<DrawableTaikoJudgement> judgementPooler = null!;
         private readonly IDictionary<HitResult, HitExplosionPool> explosionPools = new Dictionary<HitResult, HitExplosionPool>();
@@ -59,13 +57,11 @@ public partial class TaikoPlayfield : ScrollingPlayfield
         /// </remarks>
         private BarLinePlayfield barLinePlayfield = null!;
 
-        private Container barLineContent = null!;
-        private Container hitObjectContent = null!;
-        private Container overlayContent = null!;
-
         [BackgroundDependencyLoader]
         private void load(OsuColour colours)
         {
+            const float hit_target_width = BASE_HEIGHT;
+
             inputDrum = new InputDrum
             {
                 Anchor = Anchor.CentreLeft,
@@ -89,7 +85,7 @@ private void load(OsuColour colours)
                         inputDrum.CreateProxy(),
                     }
                 },
-                mascot = new SkinnableDrawable(new TaikoSkinComponentLookup(TaikoSkinComponents.Mascot), _ => Empty())
+                new SkinnableDrawable(new TaikoSkinComponentLookup(TaikoSkinComponents.Mascot), _ => Empty())
                 {
                     Origin = Anchor.BottomLeft,
                     Anchor = Anchor.TopLeft,
@@ -101,14 +97,13 @@ private void load(OsuColour colours)
                 {
                     Name = "Right area",
                     RelativeSizeAxes = Axes.Both,
-                    RelativePositionAxes = Axes.Both,
                     Children = new Drawable[]
                     {
                         new Container
                         {
-                            Name = "Elements before hit objects",
-                            RelativeSizeAxes = Axes.Both,
-                            FillMode = FillMode.Fit,
+                            Name = "Elements behind hit objects",
+                            RelativeSizeAxes = Axes.Y,
+                            Width = hit_target_width,
                             Children = new[]
                             {
                                 new SkinnableDrawable(new TaikoSkinComponentLookup(TaikoSkinComponents.KiaiGlow), _ => Empty())
@@ -125,10 +120,11 @@ private void load(OsuColour colours)
                                 }
                             }
                         },
-                        barLineContent = new Container
+                        new Container
                         {
                             Name = "Bar line content",
                             RelativeSizeAxes = Axes.Both,
+                            Padding = new MarginPadding { Left = hit_target_width / 2 },
                             Children = new Drawable[]
                             {
                                 UnderlayElements = new Container
@@ -138,17 +134,19 @@ private void load(OsuColour colours)
                                 barLinePlayfield = new BarLinePlayfield(),
                             }
                         },
-                        hitObjectContent = new Container
+                        new Container
                         {
                             Name = "Masked hit objects content",
                             RelativeSizeAxes = Axes.Both,
+                            Padding = new MarginPadding { Left = hit_target_width / 2 },
                             Masking = true,
                             Child = HitObjectContainer,
                         },
-                        overlayContent = new Container
+                        new Container
                         {
-                            Name = "Elements after hit objects",
+                            Name = "Overlay content",
                             RelativeSizeAxes = Axes.Both,
+                            Padding = new MarginPadding { Left = hit_target_width / 2 },
                             Children = new Drawable[]
                             {
                                 drumRollHitContainer = new DrumRollHitContainer(),
@@ -226,14 +224,8 @@ protected override void Update()
         {
             base.Update();
 
-            // Padding is required to be updated for elements which are based on "absolute" X sized elements.
-            // This is basically allowing for correct alignment as relative pieces move around them.
-            rightArea.Padding = new MarginPadding { Left = inputDrum.Width };
-            barLineContent.Padding = new MarginPadding { Left = HitTarget.DrawWidth / 2 };
-            hitObjectContent.Padding = new MarginPadding { Left = HitTarget.DrawWidth / 2 };
-            overlayContent.Padding = new MarginPadding { Left = HitTarget.DrawWidth / 2 };
-
-            mascot.Scale = new Vector2(DrawHeight / DEFAULT_HEIGHT);
+            // todo: input drum width should be constant.
+            rightArea.Padding = new MarginPadding { Left = inputDrum.DrawWidth };
         }
 
         #region Pooling support

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((Parent!.ChildSize.Y / 768f) * (relativeHeight / base_relative_height), 1f));
+            Width = 1 / Scale.X;
         }
     }
 }