Implement CSS-style font size algorithm

osu.Framework.Tests/Resources/Fonts/Noto/LICENSE.txt

@@ -0,0 +1,202 @@
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osu.Framework.Tests/TestGame.cs

@@ -4,6 +4,7 @@
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.IO.Stores;
+using osu.Framework.Text;
 
 namespace osu.Framework.Tests
 {
@@ -12,10 +13,18 @@ internal class TestGame : Game
     {
         public readonly Bindable<bool> BlockExit = new Bindable<bool>();
 
+        private FontStore testFonts;
+
         [BackgroundDependencyLoader]
         private void load()
         {
             Resources.AddStore(new NamespacedResourceStore<byte[]>(new DllResourceStore(typeof(TestGame).Assembly), "Resources"));
+
+            // nested store for framework test fonts to not interfere with framework's default (roboto) in test scenes.
+            Fonts.AddStore(testFonts = new FontStore(useAtlas: false));
+
+            // note that only a few of the noto sprite sheets have been included with this font, not the full set.
+            AddFont(Resources, "Fonts/Noto/Noto-Basic", metrics: new FontMetrics(880, 120, 1000), target: testFonts);
         }
 
         protected override bool OnExiting() => BlockExit.Value;