Translate glyphRun bounds by the baseline origin (#15839)

src/Avalonia.Base/Media/GlyphRun.cs

@@ -153,7 +153,8 @@ namespace Avalonia.Media
         /// <summary>
         ///     Gets the conservative bounding box of the <see cref="GlyphRun"/>.
         /// </summary>
-        public Rect Bounds => new Rect(new Size(Metrics.WidthIncludingTrailingWhitespace, Metrics.Height));
+        public Rect Bounds => new Rect(new Point(BaselineOrigin.X, 0),
+            new Size(Metrics.WidthIncludingTrailingWhitespace, Metrics.Height));
 
         public Rect InkBounds => PlatformImpl.Item.Bounds;
 

src/Skia/Avalonia.Skia/GlyphRunImpl.cs

@@ -78,7 +78,7 @@ namespace Avalonia.Skia
             ArrayPool<SKRect>.Shared.Return(glyphBounds);
 
             BaselineOrigin = baselineOrigin;
-            Bounds = runBounds;
+            Bounds = runBounds.Translate(new Vector(baselineOrigin.X, 0));
         }
 
         public IGlyphTypeface GlyphTypeface => _glyphTypefaceImpl;