perf: Specialized binding for UIElement.AdjustCornerRadius()

Author: ebariche

src/Uno.UI.BindingHelper.Android/Uno/UI/UIElementNative.java

@@ -0,0 +1,18 @@
+package Uno.UI;
+
+import android.graphics.*;
+
+public final class UIElementNative
+{
+	private UIElementNative() {
+	}
+
+	public static void adjustCornerRadius(Canvas canvas, float[] radii)
+	{
+		Path clipPath = new Path();
+
+		clipPath.addRoundRect(new RectF(canvas.getClipBounds()), radii, Path.Direction.CW);
+
+		canvas.clipPath(clipPath);
+	}
+}

src/Uno.UI/UI/Xaml/CornerRadius.Android.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using Android.Graphics;
 using Uno.UI;
 using Uno.UI.Controls;
@@ -9,10 +9,9 @@ partial struct CornerRadius
 	{
 		internal Path GetOutlinePath(RectF rect)
 		{
-			var radii = GetRadii();
-
 			var path = new Path();
-			path.AddRoundRect(rect, radii, Path.Direction.Cw);
+
+			path.AddRoundRect(rect, GetRadii(), Path.Direction.Cw);
 
 			return path;
 		}
@@ -29,16 +28,21 @@ internal Path GetInnerOutlinePath(RectF rect, Thickness borderThickness)
 
 		internal float[] GetRadii()
 		{
+			var topLeft = ViewHelper.LogicalToPhysicalPixels(TopLeft);
+			var topRight = ViewHelper.LogicalToPhysicalPixels(TopRight);
+			var bottomRight = ViewHelper.LogicalToPhysicalPixels(BottomRight);
+			var bottomLeft = ViewHelper.LogicalToPhysicalPixels(BottomLeft);
+
 			return new float[]
 			{
-				ViewHelper.LogicalToPhysicalPixels(TopLeft),
-				ViewHelper.LogicalToPhysicalPixels(TopLeft),
-				ViewHelper.LogicalToPhysicalPixels(TopRight),
-				ViewHelper.LogicalToPhysicalPixels(TopRight),
-				ViewHelper.LogicalToPhysicalPixels(BottomRight),
-				ViewHelper.LogicalToPhysicalPixels(BottomRight),
-				ViewHelper.LogicalToPhysicalPixels(BottomLeft),
-				ViewHelper.LogicalToPhysicalPixels(BottomLeft)
+				topLeft,
+				topLeft,
+				topRight,
+				topRight,
+				bottomRight,
+				bottomRight,
+				bottomLeft,
+				bottomLeft
 			};
 		}
 

src/Uno.UI/UI/Xaml/UIElement.Android.cs

@@ -1,4 +1,4 @@
-using Uno.UI;
+using Uno.UI;
 using Uno.UI.Controls;
 using Uno.UI.Extensions;
 using Uno.UI.Xaml.Input;
@@ -180,9 +180,7 @@ private protected void AdjustCornerRadius(Android.Graphics.Canvas canvas, Corner
 		{
 			if (cornerRadius != CornerRadius.None)
 			{
-				var rect = new RectF(canvas.ClipBounds);
-				var clipPath = cornerRadius.GetOutlinePath(rect);
-				canvas.ClipPath(clipPath);
+				UIElementNative.AdjustCornerRadius(canvas, cornerRadius.GetRadii());
 			}
 		}