Add basic test scene upscaling all skin elements

osu.Game.Tests/Visual/Gameplay/TestSceneGameplayElementDimensions.cs

@@ -0,0 +1,73 @@
+// 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 System.Collections.Generic;
+using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics.Textures;
+using osu.Framework.Testing;
+using osu.Game.IO;
+using osu.Game.Rulesets;
+using osu.Game.Screens.Play;
+using osu.Game.Skinning;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    public partial class TestSceneGameplayElementDimensions : TestSceneAllRulesetPlayers
+    {
+        protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
+        {
+            var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
+
+            // for now this only applies to legacy skins, as modern skins don't have texture-based gameplay elements yet.
+            dependencies.CacheAs<ISkinSource>(new UpscaledLegacySkin(dependencies.Get<SkinManager>()));
+
+            return dependencies;
+        }
+
+        protected override void AddCheckSteps()
+        {
+        }
+
+        protected override Player CreatePlayer(Ruleset ruleset)
+        {
+            var player = base.CreatePlayer(ruleset);
+            player.OnLoadComplete += _ =>
+            {
+                // this test scene focuses on gameplay elements, so let's hide the hud.
+                var hudOverlay = player.ChildrenOfType<HUDOverlay>().Single();
+                hudOverlay.ShowHud.Value = false;
+                hudOverlay.ShowHud.Disabled = true;
+            };
+            return player;
+        }
+
+        private class UpscaledLegacySkin : DefaultLegacySkin, ISkinSource
+        {
+            public UpscaledLegacySkin(IStorageResourceProvider resources)
+                : base(resources)
+            {
+            }
+
+            public event Action? SourceChanged
+            {
+                add { }
+                remove { }
+            }
+
+            public override Texture? GetTexture(string componentName, WrapMode wrapModeS, WrapMode wrapModeT)
+            {
+                var texture = base.GetTexture(componentName, wrapModeS, wrapModeT);
+
+                if (texture != null)
+                    texture.ScaleAdjust /= 5f;
+
+                return texture;
+            }
+
+            public ISkin? FindProvider(Func<ISkin, bool> lookupFunction) => this;
+            public IEnumerable<ISkin> AllSources => new[] { this };
+        }
+    }
+}