Added a way to disable raster canvas scaling to Forms views

source/SkiaSharp.Views.Forms/SkiaSharp.Views.Forms.Android/SKCanvasViewRenderer.cs

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel;
 using Android.Content;
 using Xamarin.Forms;
 using Xamarin.Forms.Platform.Android;
@@ -29,6 +30,7 @@ namespace SkiaSharp.Views.Forms
 
 				// create the native view
 				var view = new InternalView(Context, newController);
+				view.IgnorePixelScaling = e.NewElement.IgnorePixelScaling;
 				SetNativeControl(view);
 
 				// subscribe to events from the user
@@ -42,6 +44,16 @@ namespace SkiaSharp.Views.Forms
 			base.OnElementChanged(e);
 		}
 
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			base.OnElementPropertyChanged(sender, e);
+
+			if (e.PropertyName == nameof(SKFormsView.IgnorePixelScaling))
+			{
+				Control.IgnorePixelScaling = Element.IgnorePixelScaling;
+			}
+		}
+
 		protected override void Dispose(bool disposing)
 		{
 			// detach all events before disposing

source/SkiaSharp.Views.Forms/SkiaSharp.Views.Forms.Shared/SKCanvasView.cs

@@ -6,6 +6,9 @@ namespace SkiaSharp.Views.Forms
 	[RenderWith(typeof(SKCanvasViewRenderer))]
 	public class SKCanvasView : View, ISKCanvasViewController
 	{
+		public static readonly BindableProperty IgnorePixelScalingProperty = 
+			BindableProperty.Create(nameof(IgnorePixelScaling), typeof(bool), typeof(SKCanvasView), default(bool));
+
 		// the user can subscribe to repaint
 		public event EventHandler<SKPaintSurfaceEventArgs> PaintSurface;
 
@@ -25,6 +28,12 @@ namespace SkiaSharp.Views.Forms
 			}
 		}
 
+		public bool IgnorePixelScaling
+		{
+			get { return (bool)GetValue(IgnorePixelScalingProperty); }
+			set { SetValue(IgnorePixelScalingProperty, value); }
+		}
+
 		// the user asks to repaint
 		public void InvalidateSurface()
 		{

source/SkiaSharp.Views.Forms/SkiaSharp.Views.Forms.iOS/SKCanvasViewRenderer.cs

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel;
 using Xamarin.Forms;
 using Xamarin.Forms.Platform.iOS;
 
@@ -28,6 +29,7 @@ namespace SkiaSharp.Views.Forms
 
 				// create the native view
 				var view = new InternalView(newController);
+				view.IgnorePixelScaling = e.NewElement.IgnorePixelScaling;
 				SetNativeControl(view);
 
 				// subscribe to events from the user
@@ -41,6 +43,16 @@ namespace SkiaSharp.Views.Forms
 			base.OnElementChanged(e);
 		}
 
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			base.OnElementPropertyChanged(sender, e);
+
+			if (e.PropertyName == nameof(SKFormsView.IgnorePixelScaling))
+			{
+				Control.IgnorePixelScaling = Element.IgnorePixelScaling;
+			}
+		}
+
 		protected override void Dispose(bool disposing)
 		{
 			// detach all events before disposing