Fix the what the `IgnorePixelScaling` property works (#1804)

binding/Binding/SKCanvas.cs

@@ -9,6 +9,8 @@ namespace SkiaSharp
 	{
 		private const int PatchCornerCount = 4;
 		private const int PatchCubicsCount = 12;
+		private const double RadiansCircle = 2.0 * Math.PI;
+		private const double DegreesCircle = 360.0;
 
 		internal SKCanvas (IntPtr handle, bool owns)
 			: base (handle, owns)
@@ -117,11 +119,17 @@ namespace SkiaSharp
 
 		public void Translate (float dx, float dy)
 		{
+			if (dx == 0 && dy == 0)
+				return;
+
 			SkiaApi.sk_canvas_translate (Handle, dx, dy);
 		}
 
 		public void Translate (SKPoint point)
 		{
+			if (point.IsEmpty)
+				return;
+
 			SkiaApi.sk_canvas_translate (Handle, point.X, point.Y);
 		}
 
@@ -129,21 +137,33 @@ namespace SkiaSharp
 
 		public void Scale (float s)
 		{
+			if (s == 1)
+				return;
+
 			SkiaApi.sk_canvas_scale (Handle, s, s);
 		}
 
 		public void Scale (float sx, float sy)
 		{
+			if (sx == 1 && sy == 1)
+				return;
+
 			SkiaApi.sk_canvas_scale (Handle, sx, sy);
 		}
 
 		public void Scale (SKPoint size)
 		{
+			if (size.IsEmpty)
+				return;
+
 			SkiaApi.sk_canvas_scale (Handle, size.X, size.Y);
 		}
 
 		public void Scale (float sx, float sy, float px, float py)
 		{
+			if (sx == 1 && sy == 1)
+				return;
+
 			Translate (px, py);
 			Scale (sx, sy);
 			Translate (-px, -py);
@@ -153,16 +173,25 @@ namespace SkiaSharp
 
 		public void RotateDegrees (float degrees)
 		{
+			if (degrees % DegreesCircle == 0)
+				return;
+
 			SkiaApi.sk_canvas_rotate_degrees (Handle, degrees);
 		}
 
 		public void RotateRadians (float radians)
 		{
+			if (radians % RadiansCircle == 0)
+				return;
+
 			SkiaApi.sk_canvas_rotate_radians (Handle, radians);
 		}
 
 		public void RotateDegrees (float degrees, float px, float py)
 		{
+			if (degrees % DegreesCircle == 0)
+				return;
+
 			Translate (px, py);
 			RotateDegrees (degrees);
 			Translate (-px, -py);
@@ -170,6 +199,9 @@ namespace SkiaSharp
 
 		public void RotateRadians (float radians, float px, float py)
 		{
+			if (radians % RadiansCircle == 0)
+				return;
+
 			Translate (px, py);
 			RotateRadians (radians);
 			Translate (-px, -py);
@@ -179,11 +211,17 @@ namespace SkiaSharp
 
 		public void Skew (float sx, float sy)
 		{
+			if (sx == 0 && sy == 0)
+				return;
+
 			SkiaApi.sk_canvas_skew (Handle, sx, sy);
 		}
 
 		public void Skew (SKPoint skew)
 		{
+			if (skew.IsEmpty)
+				return;
+
 			SkiaApi.sk_canvas_skew (Handle, skew.X, skew.Y);
 		}
 

build.cake

@@ -424,6 +424,8 @@ Task ("samples")
         { "tvos", isMac },
         { "uwp", isWin },
         { "winui", isWin },
+        { "wapproj", isWin },
+        { "msix", isWin },
         { "watchos", isMac },
         { "wpf", isWin },
     };
@@ -433,6 +435,7 @@ Task ("samples")
         { "tvos", "iPhoneSimulator" },
         { "uwp", "x86" },
         { "winui", "x64" },
+        { "wapproj", "x64" },
         { "watchos", "iPhoneSimulator" },
         { "xamarin.forms.mac", "iPhone" },
         { "xamarin.forms.windows", "x86" },
@@ -458,8 +461,12 @@ Task ("samples")
                 buildPlatform = platformMatrix [platform];
             }
 
+            Information ($"Building {sln} ({platform})...");
+
             RunNuGetRestorePackagesConfig (sln);
             RunMSBuild (sln, platform: buildPlatform);
+        } else {
+            Information ($"Skipping {sln} ({platform})...");
         }
     }
 

samples/Basic/Android/SkiaSharpSample/MainActivity.cs

@@ -40,13 +40,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = Resources.DisplayMetrics.Density;
-			var scaledSize = new SKSize(e.Info.Width / scale, e.Info.Height / scale);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -59,7 +52,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint(scaledSize.Width / 2, (scaledSize.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/Android/SkiaSharpSample/Resources/layout/main.xml

@@ -1,10 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
     <SkiaSharp.Views.Android.SKCanvasView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        app:ignorePixelScaling="true"
         android:id="@+id/skiaView" />
 </FrameLayout>

samples/Basic/Desktop/SkiaSharpSample/Form1.cs

@@ -17,13 +17,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = 1f;
-			var scaledSize = new SKSize(e.Info.Width / scale, e.Info.Height / scale);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -36,7 +29,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint(scaledSize.Width / 2, (scaledSize.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/ElmSharp/SkiaSharpSample/App.cs

@@ -33,6 +33,7 @@ namespace SkiaSharpSample
 			window.Show();
 
 			var skiaView = new SKCanvasView(window);
+			skiaView.IgnorePixelScaling = true;
 			skiaView.PaintSurface += OnPaintSurface;
 			skiaView.Show();
 
@@ -43,18 +44,9 @@ namespace SkiaSharpSample
 
 		private void OnPaintSurface(object sender, SKPaintSurfaceEventArgs e)
 		{
-			var skiaView = sender as SKCanvasView;
-
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = (float)ScalingInfo.ScalingFactor;
-			var scaledSize = new SKSize(e.Info.Width / scale, e.Info.Height / scale);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -67,7 +59,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint(scaledSize.Width / 2, (scaledSize.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 

samples/Basic/Gtk/SkiaSharpSample/MainWindow.cs

@@ -24,13 +24,6 @@ public partial class MainWindow : Gtk.Window
 		// the the canvas and properties
 		var canvas = e.Surface.Canvas;
 
-		// get the screen density for scaling
-		var scale = 1f;
-		var scaledSize = new SKSize(e.Info.Width / scale, e.Info.Height / scale);
-
-		// handle the device screen density
-		canvas.Scale(scale);
-
 		// make sure the canvas is blank
 		canvas.Clear(SKColors.White);
 
@@ -43,7 +36,7 @@ public partial class MainWindow : Gtk.Window
 			TextAlign = SKTextAlign.Center,
 			TextSize = 24
 		};
-		var coord = new SKPoint(scaledSize.Width / 2, (scaledSize.Height + paint.TextSize) / 2);
+		var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 		canvas.DrawText("SkiaSharp", coord, paint);
 	}
 }

samples/Basic/Gtk3/SkiaSharpSample/MainWindow.cs

@@ -37,13 +37,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = 1f;
-			var scaledSize = new SKSize(e.Info.Width / scale, e.Info.Height / scale);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -56,7 +49,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint(scaledSize.Width / 2, (scaledSize.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/Maui/SkiaSharpSample/MainPage.xaml

@@ -5,6 +5,7 @@
              BackgroundColor="White">
 
     <skia:SKCanvasView x:Name="skiaView" PaintSurface="OnPaintSurface"
-                       EnableTouchEvents="True" Touch="OnTouch" />
+                       EnableTouchEvents="True" Touch="OnTouch"
+                       IgnorePixelScaling="True" />
 
 </ContentPage>

samples/Basic/Maui/SkiaSharpSample/MainPage.xaml.cs

@@ -30,12 +30,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = (float)(e.Info.Width / skiaView.Width);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -51,8 +45,8 @@ namespace SkiaSharpSample
 
 			// adjust the location based on the pointer
 			var coord = (touchLocation is SKPoint loc)
-				? new SKPoint(loc.X / scale, loc.Y / scale)
-				: new SKPoint((float)skiaView.Width / 2, ((float)skiaView.Height + paint.TextSize) / 2);
+				? new SKPoint(loc.X, loc.Y)
+				: new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 
 			// draw some text
 			canvas.DrawText("SkiaSharp", coord, paint);

samples/Basic/Maui/SkiaSharpSample/SkiaSharpSample.csproj

@@ -4,13 +4,14 @@
     <TargetFrameworks>net6.0-ios;net6.0-maccatalyst;net6.0-android</TargetFrameworks>
     <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows')) and '$(MSBuildRuntimeType)' == 'Full'">$(TargetFrameworks);net6.0-windows10.0.19041</TargetFrameworks>
     <OutputType>Exe</OutputType>
+    <UseMaui>true</UseMaui>
     <SingleProject>true</SingleProject>
+    <EnablePreviewMsixTooling>true</EnablePreviewMsixTooling>
     <RootNamespace>SkiaSharpSample</RootNamespace>
     <ApplicationTitle>SkiaSharpSample</ApplicationTitle>
     <ApplicationId>com.companyname.SkiaSharpSample</ApplicationId>
     <ApplicationVersion>1.0</ApplicationVersion>
     <AndroidVersionCode>1</AndroidVersionCode>
-    <UseMaui>true</UseMaui>
     <LangVersion>9.0</LangVersion>
     <UseInterpreter Condition="'$(Configuration)' == 'Debug'">True</UseInterpreter>
   </PropertyGroup>
@@ -39,10 +40,9 @@
     </None>
   </ItemGroup>
 
-  <PropertyGroup>
-    <EnablePreviewMsixTooling>true</EnablePreviewMsixTooling>
-    <AppxPackageRecipe>bin\$(Configuration)\net6.0-windows10.0.19041\win-x64\SkiaSharpSample.build.appxrecipe</AppxPackageRecipe>
-    <RuntimeIdentifier Condition="$(TargetFramework.Contains('-windows'))">win-x64</RuntimeIdentifier>
+  <PropertyGroup Condition="$(TargetFramework.Contains('-windows'))">
+    <OutputType>WinExe</OutputType>
+    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\output\SkiaSharp\nuget\build\$(TargetFramework)\SkiaSharp.Local.targets" Condition="Exists('..\..\..\..\output\SkiaSharp\nuget\build\$(TargetFramework)\SkiaSharp.Local.targets')" />

samples/Basic/NetCore/WPF/SkiaSharpSample/MainWindow.xaml

@@ -8,6 +8,6 @@
         mc:Ignorable="d"
         Title="SkiaSharp" Height="350" Width="525" Icon="/icon.ico">
     <Grid>
-        <skia:SKElement PaintSurface="OnPaintSurface" />
+        <skia:SKElement PaintSurface="OnPaintSurface" IgnorePixelScaling="True" />
     </Grid>
 </Window>

samples/Basic/NetCore/WPF/SkiaSharpSample/MainWindow.xaml.cs

@@ -17,13 +17,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = (float)PresentationSource.FromVisual(this).CompositionTarget.TransformToDevice.M11;
-			var scaledSize = new SKSize(e.Info.Width / scale, e.Info.Height / scale);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -36,7 +29,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint(scaledSize.Width / 2, (scaledSize.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/Tizen/SkiaSharpSample/MainPage.xaml

@@ -5,6 +5,6 @@
              xmlns:skia="clr-namespace:SkiaSharp.Views.Forms;assembly=SkiaSharp.Views.Forms"
              x:Class="SkiaSharpSample.MainPage">
 
-    <skia:SKCanvasView x:Name="skiaView" PaintSurface="OnPaintSurface" />
+    <skia:SKCanvasView x:Name="skiaView" PaintSurface="OnPaintSurface" IgnorePixelScaling="True" />
 
 </ContentPage>

samples/Basic/Tizen/SkiaSharpSample/MainPage.xaml.cs

@@ -17,12 +17,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = (float)(e.Info.Width / skiaView.Width);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -35,7 +29,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint((float)skiaView.Width / 2, ((float)skiaView.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/UWP/SkiaSharpSample/MainPage.xaml

@@ -8,6 +8,6 @@
     xmlns:skia="using:SkiaSharp.Views.UWP"
     mc:Ignorable="d">
     <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
-        <skia:SKXamlCanvas PaintSurface="OnPaintSurface" />
+        <skia:SKXamlCanvas PaintSurface="OnPaintSurface" IgnorePixelScaling="True" />
     </Grid>
 </Page>

samples/Basic/UWP/SkiaSharpSample/MainPage.xaml.cs

@@ -1,5 +1,4 @@
-using Windows.Graphics.Display;
-using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls;
 
 using SkiaSharp;
 using SkiaSharp.Views.UWP;
@@ -18,14 +17,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var display = DisplayInformation.GetForCurrentView();
-			var scale = display.LogicalDpi / 96.0f;
-			var scaledSize = new SKSize(e.Info.Width / scale, e.Info.Height / scale);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -38,7 +29,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint(scaledSize.Width / 2, (scaledSize.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/Uno/SkiaSharpSample.Shared/MainPage.xaml

@@ -7,7 +7,9 @@
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:skia="using:SkiaSharp.Views.UWP"
     mc:Ignorable="d">
+
     <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
-        <skia:SKXamlCanvas PaintSurface="OnPaintSurface" />
+        <skia:SKXamlCanvas PaintSurface="OnPaintSurface" IgnorePixelScaling="True" />
     </Grid>
+
 </Page>

samples/Basic/Uno/SkiaSharpSample.Shared/MainPage.xaml.cs

@@ -18,14 +18,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var display = DisplayInformation.GetForCurrentView();
-			var scale = display.LogicalDpi / 96.0f;
-			var scaledSize = new SKSize(e.Info.Width / scale, e.Info.Height / scale);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -38,7 +30,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint(scaledSize.Width / 2, (scaledSize.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/WPF/SkiaSharpSample/MainWindow.xaml

@@ -8,6 +8,6 @@
         mc:Ignorable="d"
         Title="SkiaSharp" Height="350" Width="525" Icon="icon.ico">
     <Grid>
-        <skia:SKElement PaintSurface="OnPaintSurface" />
+        <skia:SKElement PaintSurface="OnPaintSurface" IgnorePixelScaling="True" />
     </Grid>
 </Window>

samples/Basic/WPF/SkiaSharpSample/MainWindow.xaml.cs

@@ -17,13 +17,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = (float)PresentationSource.FromVisual(this).CompositionTarget.TransformToDevice.M11;
-			var scaledSize = new SKSize(e.Info.Width / scale, e.Info.Height / scale);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -36,7 +29,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint(scaledSize.Width / 2, (scaledSize.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/WinUI/Msix/SkiaSharpSample.sln

@@ -0,0 +1,41 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31709.45
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SkiaSharpSample", "SkiaSharpSample\SkiaSharpSample.csproj", "{71668276-ECDD-49EC-9406-27A9D2676139}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SkiaSharp", "..\..\..\..\binding\SkiaSharp\SkiaSharp.csproj", "{EA2AC287-6FEF-415D-BD33-01287DD11574}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SkiaSharp.Views.WinUI", "..\..\..\..\source\SkiaSharp.Views.WinUI\SkiaSharp.Views.WinUI\SkiaSharp.Views.WinUI.csproj", "{B9E319D8-0A0E-471C-BD01-8015655FBD99}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{71668276-ECDD-49EC-9406-27A9D2676139}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{71668276-ECDD-49EC-9406-27A9D2676139}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{71668276-ECDD-49EC-9406-27A9D2676139}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
+		{71668276-ECDD-49EC-9406-27A9D2676139}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{71668276-ECDD-49EC-9406-27A9D2676139}.Release|Any CPU.Build.0 = Release|Any CPU
+		{71668276-ECDD-49EC-9406-27A9D2676139}.Release|Any CPU.Deploy.0 = Release|Any CPU
+		{EA2AC287-6FEF-415D-BD33-01287DD11574}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EA2AC287-6FEF-415D-BD33-01287DD11574}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EA2AC287-6FEF-415D-BD33-01287DD11574}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EA2AC287-6FEF-415D-BD33-01287DD11574}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B9E319D8-0A0E-471C-BD01-8015655FBD99}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B9E319D8-0A0E-471C-BD01-8015655FBD99}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B9E319D8-0A0E-471C-BD01-8015655FBD99}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
+		{B9E319D8-0A0E-471C-BD01-8015655FBD99}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B9E319D8-0A0E-471C-BD01-8015655FBD99}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B9E319D8-0A0E-471C-BD01-8015655FBD99}.Release|Any CPU.Deploy.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {F5AABA3E-0272-4E88-A2B4-BD422E83400E}
+	EndGlobalSection
+EndGlobal

samples/Basic/WinUI/Msix/SkiaSharpSample/MainWindow.xaml

@@ -8,6 +8,6 @@
     xmlns:skia="using:SkiaSharp.Views.Windows"
     mc:Ignorable="d">
 
-    <skia:SKXamlCanvas PaintSurface="OnPaintSurface" />
+    <skia:SKXamlCanvas PaintSurface="OnPaintSurface" IgnorePixelScaling="True" />
 
 </Window>

samples/Basic/WinUI/Msix/SkiaSharpSample/MainWindow.xaml.cs

@@ -16,13 +16,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = (float)((SKXamlCanvas)sender).XamlRoot.RasterizationScale;
-			var scaledSize = new SKSize(e.Info.Width / scale, e.Info.Height / scale);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -35,7 +28,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint(scaledSize.Width / 2, (scaledSize.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/WinUI/Msix/SkiaSharpSample/Properties/launchSettings.json

@@ -0,0 +1,8 @@
+{
+  "profiles": {
+    "Windows Machine": {
+      "commandName": "MsixPackage",
+      "nativeDebugging": true
+    }
+  }
+}

samples/Basic/WinUI/Msix/SkiaSharpSample/SkiaSharpSample.csproj

@@ -0,0 +1,39 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net5.0-windows10.0.19041.0</TargetFramework>
+    <TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion>
+    <RootNamespace>SkiaSharpSample</RootNamespace>
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+    <EnablePreviewMsixTooling>true</EnablePreviewMsixTooling>
+    <RuntimeIdentifiers>win10-x86;win10-x64;win10-arm64</RuntimeIdentifiers>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.0.0-experimental1" />
+    <PackageReference Include="Microsoft.WindowsAppSDK.Foundation" Version="1.0.0-experimental1" />
+    <PackageReference Include="Microsoft.WindowsAppSDK.WinUI" Version="1.0.0-experimental1" />
+    <Manifest Include="$(ApplicationManifest)" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\..\..\binding\SkiaSharp\SkiaSharp.csproj" />
+    <ProjectReference Include="..\..\..\..\..\source\SkiaSharp.Views.WinUI\SkiaSharp.Views.WinUI\SkiaSharp.Views.WinUI.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="..\..\..\..\..\output\native\windows\x64\libSkiaSharp.dll" Condition="Exists('..\..\..\..\..\output\native\windows\x64\libSkiaSharp.dll')" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="Images\LockScreenLogo.scale-200.png" />
+    <Content Include="Images\SplashScreen.scale-200.png" />
+    <Content Include="Images\Square150x150Logo.scale-200.png" />
+    <Content Include="Images\Square44x44Logo.scale-200.png" />
+    <Content Include="Images\Square44x44Logo.targetsize-24_altform-unplated.png" />
+    <Content Include="Images\StoreLogo.png" />
+    <Content Include="Images\Wide310x150Logo.scale-200.png" />
+  </ItemGroup>
+
+</Project>

samples/Basic/WinUI/WapProj/SkiaSharpSample.Package/Package.appxmanifest

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<Package
+  xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
+  xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
+  xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
+  IgnorableNamespaces="uap rescap">
+
+  <Identity
+    Name="479d1110-d6ad-48a8-ac62-4af987a884d0"
+    Publisher="CN=matthew"
+    Version="1.0.0.0" />
+
+  <Properties>
+    <DisplayName>SkiaSharpSample</DisplayName>
+    <PublisherDisplayName>matthew</PublisherDisplayName>
+    <Logo>Images\StoreLogo.png</Logo>
+  </Properties>
+
+  <Dependencies>
+    <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.17763.0" MaxVersionTested="10.0.19041.0" />
+    <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.17763.0" MaxVersionTested="10.0.19041.0" />
+  </Dependencies>
+
+  <Resources>
+    <Resource Language="x-generate"/>
+  </Resources>
+
+  <Applications>
+    <Application Id="App"
+      Executable="$targetnametoken$.exe"
+      EntryPoint="$targetentrypoint$">
+      <uap:VisualElements
+        DisplayName="SkiaSharpSample"
+        Description="SkiaSharpSample"
+        BackgroundColor="transparent"
+        Square150x150Logo="Images\Square150x150Logo.png"
+        Square44x44Logo="Images\Square44x44Logo.png">
+        <uap:DefaultTile Wide310x150Logo="Images\Wide310x150Logo.png" />
+        <uap:SplashScreen Image="Images\SplashScreen.png" />
+      </uap:VisualElements>
+    </Application>
+  </Applications>
+
+  <Capabilities>
+    <rescap:Capability Name="runFullTrust" />
+  </Capabilities>
+</Package>

samples/Basic/WinUI/WapProj/SkiaSharpSample/App.xaml

@@ -0,0 +1,15 @@
+<Application
+    x:Class="SkiaSharpSample.App"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:SkiaSharpSample">
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls" />
+                <!-- Other merged dictionaries here -->
+            </ResourceDictionary.MergedDictionaries>
+            <!-- Other app resources here -->
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

samples/Basic/WinUI/WapProj/SkiaSharpSample/App.xaml.cs

@@ -0,0 +1,20 @@
+using Microsoft.UI.Xaml;
+
+namespace SkiaSharpSample
+{
+	public partial class App : Application
+	{
+		private Window window;
+
+		public App()
+		{
+			InitializeComponent();
+		}
+
+		protected override void OnLaunched(LaunchActivatedEventArgs args)
+		{
+			window = new MainWindow();
+			window.Activate();
+		}
+	}
+}

samples/Basic/WinUI/WapProj/SkiaSharpSample/MainWindow.xaml

@@ -0,0 +1,13 @@
+<Window
+    x:Class="SkiaSharpSample.MainWindow"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:SkiaSharpSample"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:skia="using:SkiaSharp.Views.Windows"
+    mc:Ignorable="d">
+
+    <skia:SKXamlCanvas PaintSurface="OnPaintSurface" IgnorePixelScaling="True" />
+
+</Window>

samples/Basic/WinUI/WapProj/SkiaSharpSample/MainWindow.xaml.cs

@@ -0,0 +1,35 @@
+using Microsoft.UI.Xaml;
+using SkiaSharp;
+using SkiaSharp.Views.Windows;
+
+namespace SkiaSharpSample
+{
+	public sealed partial class MainWindow : Window
+	{
+		public MainWindow()
+		{
+			InitializeComponent();
+		}
+
+		private void OnPaintSurface(object sender, SKPaintSurfaceEventArgs e)
+		{
+			// the the canvas and properties
+			var canvas = e.Surface.Canvas;
+
+			// make sure the canvas is blank
+			canvas.Clear(SKColors.White);
+
+			// draw some text
+			var paint = new SKPaint
+			{
+				Color = SKColors.Black,
+				IsAntialias = true,
+				Style = SKPaintStyle.Fill,
+				TextAlign = SKTextAlign.Center,
+				TextSize = 24
+			};
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
+			canvas.DrawText("SkiaSharp", coord, paint);
+		}
+	}
+}

samples/Basic/WinUI/WapProj/SkiaSharpSample/app.manifest

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <assemblyIdentity version="1.0.0.0" name="SkiaSharpSample.app"/>
+
+  <application xmlns="urn:schemas-microsoft-com:asm.v3">
+    <windowsSettings>
+      <!-- The combination of below two tags have the following effect:
+           1) Per-Monitor for >= Windows 10 Anniversary Update
+           2) System < Windows 10 Anniversary Update
+      -->
+      <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true/PM</dpiAware>
+      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2, PerMonitor</dpiAwareness>
+    </windowsSettings>
+  </application>
+</assembly>

samples/Basic/Xamarin.Forms/SkiaSharpSample/MainPage.xaml

@@ -5,6 +5,8 @@
              x:Class="SkiaSharpSample.MainPage"
              Title="SkiaSharp">
 
-    <skia:SKCanvasView x:Name="skiaView" PaintSurface="OnPaintSurface" />
+    <skia:SKCanvasView x:Name="skiaView" PaintSurface="OnPaintSurface"
+                       EnableTouchEvents="True" Touch="OnTouch"
+                       IgnorePixelScaling="True" />
 
 </ContentPage>

samples/Basic/Xamarin.Forms/SkiaSharpSample/MainPage.xaml.cs

@@ -7,27 +7,35 @@ namespace SkiaSharpSample
 {
 	public partial class MainPage : ContentPage
 	{
+		private SKPoint? touchLocation;
+
 		public MainPage()
 		{
 			InitializeComponent();
 		}
 
+		private void OnTouch(object sender, SKTouchEventArgs e)
+		{
+			if (e.InContact)
+				touchLocation = e.Location;
+			else
+				touchLocation = null;
+
+			skiaView.InvalidateSurface();
+
+			e.Handled = true;
+		}
+
 		private void OnPaintSurface(object sender, SKPaintSurfaceEventArgs e)
 		{
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = (float)(e.Info.Width / skiaView.Width);
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
-			// draw some text
-			var paint = new SKPaint
+			// decide what the text looks like
+			using var paint = new SKPaint
 			{
 				Color = SKColors.Black,
 				IsAntialias = true,
@@ -35,7 +43,13 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint((float)skiaView.Width / 2, ((float)skiaView.Height + paint.TextSize) / 2);
+
+			// adjust the location based on the pointer
+			var coord = (touchLocation is SKPoint loc)
+				? new SKPoint(loc.X, loc.Y)
+				: new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
+
+			// draw some text
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/iOS/SkiaSharpSample/ViewController.cs

@@ -17,6 +17,7 @@ namespace SkiaSharpSample
 		{
 			base.ViewDidLoad();
 
+			skiaView.IgnorePixelScaling = true;
 			skiaView.PaintSurface += OnPaintSurface;
 		}
 
@@ -25,12 +26,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = (float)skiaView.ContentScaleFactor;
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -43,7 +38,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint((float)skiaView.Bounds.Width / 2, ((float)skiaView.Bounds.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/macOS/SkiaSharpSample/ViewController.cs

@@ -17,6 +17,7 @@ namespace SkiaSharpSample
 		{
 			base.ViewDidLoad();
 
+			skiaView.IgnorePixelScaling = true;
 			skiaView.PaintSurface += OnPaintSurface;
 		}
 
@@ -25,12 +26,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = (float)skiaView.Window.BackingScaleFactor;
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -43,7 +38,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 24
 			};
-			var coord = new SKPoint((float)skiaView.Bounds.Width / 2, ((float)skiaView.Bounds.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

samples/Basic/tvOS/SkiaSharpSample/ViewController.cs

@@ -17,6 +17,7 @@ namespace SkiaSharpSample
 		{
 			base.ViewDidLoad();
 
+			skiaView.IgnorePixelScaling = true;
 			skiaView.PaintSurface += OnPaintSurface;
 		}
 
@@ -25,12 +26,6 @@ namespace SkiaSharpSample
 			// the the canvas and properties
 			var canvas = e.Surface.Canvas;
 
-			// get the screen density for scaling
-			var scale = (float)skiaView.ContentScaleFactor;
-
-			// handle the device screen density
-			canvas.Scale(scale);
-
 			// make sure the canvas is blank
 			canvas.Clear(SKColors.White);
 
@@ -43,7 +38,7 @@ namespace SkiaSharpSample
 				TextAlign = SKTextAlign.Center,
 				TextSize = 48
 			};
-			var coord = new SKPoint((float)skiaView.Bounds.Width / 2, ((float)skiaView.Bounds.Height + paint.TextSize) / 2);
+			var coord = new SKPoint(e.Info.Width / 2, (e.Info.Height + paint.TextSize) / 2);
 			canvas.DrawText("SkiaSharp", coord, paint);
 		}
 	}

scripts/Docker/wasm/build-local.sh

@@ -4,12 +4,17 @@ set -e
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
 VERSION_ARGS=""
+EMSCRIPTEN_VERSION=2.0.23
 if [ "$1" ]; then
     VERSION_ARGS="--build-arg EMSCRIPTEN_VERSION=$1"
+    EMSCRIPTEN_VERSION=$1
 fi
 
 (cd $DIR && docker build --tag skiasharp-wasm $VERSION_ARGS .)
 (cd $DIR/../../../ && \
     docker run --rm --name skiasharp-wasm --volume $(pwd):/work skiasharp-wasm /bin/bash -c "\
         dotnet tool restore && \
-        dotnet cake --target=externals-wasm --emscriptenVersion=$1")
+        dotnet cake --target=externals-wasm --emscriptenVersion=$EMSCRIPTEN_VERSION")
+
+# sudo chown -R $(id -u):$(id -g) .
+# (cd samples/Basic/Uno/SkiaSharpSample.Wasm/bin/Debug/netstandard2.0/dist && python3 server.py)

source/SkiaSharp.Views.Forms/SkiaSharp.Views.Forms.Native.Shared/SKCanvasViewRendererBase.cs

@@ -273,7 +273,7 @@ namespace SkiaSharp.Views.Forms
 			var controller = Element as ISKCanvasViewController;
 
 			// the control is being repainted, let the user know
-			controller?.OnPaintSurface(new SKPaintSurfaceEventArgs(e.Surface, e.Info));
+			controller?.OnPaintSurface(new SKPaintSurfaceEventArgs(e.Surface, e.Info, e.RawInfo));
 		}
 
 		private void OnSurfaceInvalidated(object sender, EventArgs eventArgs)

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

@@ -15,13 +15,21 @@ namespace SkiaSharp.Views.Forms
 	public class SKPaintSurfaceEventArgs : EventArgs
 	{
 		public SKPaintSurfaceEventArgs(SKSurface surface, SKImageInfo info)
+			: this(surface, info, info)
+		{
+		}
+
+		public SKPaintSurfaceEventArgs(SKSurface surface, SKImageInfo info, SKImageInfo rawInfo)
 		{
 			Surface = surface;
 			Info = info;
+			RawInfo = rawInfo;
 		}
 
-		public SKSurface Surface { get; private set; }
+		public SKSurface Surface { get; }
 
-		public SKImageInfo Info { get; private set; }
+		public SKImageInfo Info { get; }
+
+		public SKImageInfo RawInfo { get; }
 	}
 }

source/SkiaSharp.Views.Uno/SkiaSharp.Views.Uno.Android/SKXamlCanvas.Android.cs

@@ -18,33 +18,12 @@ namespace SkiaSharp.Views.UWP
 		partial void DoUnloaded() =>
 			surfaceFactory.Dispose();
 
-		private SKSize GetCanvasSize() =>
-			surfaceFactory.Info.Size;
-
 		private void DoInvalidate()
 		{
-			UpdateCanvasSize((int)ActualWidth, (int)ActualHeight);
+			surfaceFactory.UpdateCanvasSize((int)(ActualWidth * Dpi), (int)(ActualHeight * Dpi));
 			base.Invalidate();
 		}
 
-		private void UpdateCanvasSize(int w, int h)
-		{
-			if (designMode)
-				return;
-
-			if (!IgnorePixelScaling)
-			{
-				var display = DisplayInformation.GetForCurrentView();
-				var scale = display.LogicalDpi / 96.0f;
-
-				surfaceFactory.UpdateCanvasSize((int)(w * scale), (int)(h * scale));
-			}
-			else
-			{
-				surfaceFactory.UpdateCanvasSize(w, h);
-			}
-		}
-
 		protected override void OnDraw(Canvas canvas)
 		{
 			base.OnDraw(canvas);
@@ -62,10 +41,25 @@ namespace SkiaSharp.Views.UWP
 			// create a skia surface
 			var surface = surfaceFactory.CreateSurface(out var info);
 			if (surface == null)
+			{
+				CanvasSize = SKSize.Empty;
 				return;
+			}
+
+			var userVisibleSize = IgnorePixelScaling
+				? new SKSizeI((int)ActualWidth, (int)ActualHeight)
+				: info.Size;
+			CanvasSize = userVisibleSize;
+
+			if (IgnorePixelScaling)
+			{
+				var skiaCanvas = surface.Canvas;
+				skiaCanvas.Scale((float)Dpi);
+				skiaCanvas.Save();
+			}
 
 			// draw using SkiaSharp
-			OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+			OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 
 			// draw the surface to the view
 			surfaceFactory.DrawSurface(surface, canvas);

source/SkiaSharp.Views.Uno/SkiaSharp.Views.Uno.Mac/SKXamlCanvas.macOS.cs

@@ -20,9 +20,6 @@ namespace SkiaSharp.Views.UWP
 		partial void DoUnloaded() =>
 			drawable?.Dispose();
 
-		private SKSize GetCanvasSize() =>
-			drawable?.Info.Size ?? SKSize.Empty;
-
 		private void DoInvalidate() =>
 			NeedsDisplay = true;
 
@@ -34,14 +31,30 @@ namespace SkiaSharp.Views.UWP
 				return;
 
 			// create the skia context
-			using var surface = drawable.CreateSurface(Bounds, IgnorePixelScaling ? 1 : Window.BackingScaleFactor, out var info);
+			using var surface = drawable.CreateSurface(Bounds, Window.BackingScaleFactor, out var info);
 			if (info.Width == 0 || info.Height == 0)
+			{
+				CanvasSize = SKSize.Empty;
 				return;
+			}
+
+			var userVisibleSize = IgnorePixelScaling
+				? new SKSizeI((int)Bounds.Width, (int)Bounds.Height)
+				: info.Size;
+
+			CanvasSize = userVisibleSize;
+
+			if (IgnorePixelScaling)
+			{
+				var skiaCanvas = surface.Canvas;
+				skiaCanvas.Scale((float)Window.BackingScaleFactor);
+				skiaCanvas.Save();
+			}
 
 			using var ctx = NSGraphicsContext.CurrentContext.CGContext;
 
 			// draw on the image using SKiaSharp
-			OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+			OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 
 			// draw the surface to the context
 			drawable.DrawSurface(ctx, Bounds, info, surface);

source/SkiaSharp.Views.Uno/SkiaSharp.Views.Uno.Reference/SKXamlCanvas.Reference.cs

@@ -13,8 +13,6 @@ namespace SkiaSharp.Views.UWP
 
 		partial void DoUnloaded() => throw new NotImplementedException();
 
-		private SKSize GetCanvasSize() => throw new NotImplementedException();
-
 		private void DoInvalidate() => throw new NotImplementedException();
 	}
 }

source/SkiaSharp.Views.Uno/SkiaSharp.Views.Uno.Skia/SKXamlCanvas.Skia.cs

@@ -23,9 +23,6 @@ namespace SkiaSharp.Views.UWP
 		partial void DoUnloaded() =>
 			FreeBitmap();
 
-		private SKSize GetCanvasSize() =>
-			new SKSize(pixelWidth, pixelHeight);
-
 		private void DoInvalidate()
 		{
 			if (designMode)
@@ -35,13 +32,26 @@ namespace SkiaSharp.Views.UWP
 				return;
 
 			if (ActualWidth <= 0 || ActualHeight <= 0)
+			{
+				CanvasSize = SKSize.Empty;
 				return;
+			}
 
-			var info = CreateBitmap();
+			var info = CreateBitmap(out var unscaledSize, out var dpi);
 
 			using (var surface = SKSurface.Create(info, pixelsHandle.AddrOfPinnedObject(), info.RowBytes))
 			{
-				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+				var userVisibleSize = IgnorePixelScaling ? unscaledSize : info.Size;
+				CanvasSize = userVisibleSize;
+
+				if (IgnorePixelScaling)
+				{
+					var canvas = surface.Canvas;
+					canvas.Scale(dpi);
+					canvas.Save();
+				}
+
+				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 			}
 
 			// This implementation is not fast enough, and providing the original pixel buffer
@@ -57,29 +67,9 @@ namespace SkiaSharp.Views.UWP
 			bitmap.Invalidate();
 		}
 
-		private SKSizeI CreateSize()
+		private SKImageInfo CreateBitmap(out SKSizeI unscaledSize, out float dpi)
 		{
-			var w = ActualWidth;
-			var h = ActualHeight;
-
-			if (!IsPositive(w) || !IsPositive(h))
-				return SKSizeI.Empty;
-
-			if (IgnorePixelScaling)
-				return new SKSizeI((int)w, (int)h);
-
-			var dpi = Dpi;
-			return new SKSizeI((int)(w * dpi), (int)(h * dpi));
-
-			static bool IsPositive(double value)
-			{
-				return !double.IsNaN(value) && !double.IsInfinity(value) && value > 0;
-			}
-		}
-
-		private SKImageInfo CreateBitmap()
-		{
-			var size = CreateSize();
+			var size = CreateSize(out unscaledSize, out dpi);
 			var info = new SKImageInfo(size.Width, size.Height, SKImageInfo.PlatformColorType, SKAlphaType.Premul);
 
 			if (bitmap?.PixelWidth != info.Width || bitmap?.PixelHeight != info.Height)
@@ -94,19 +84,9 @@ namespace SkiaSharp.Views.UWP
 					ImageSource = bitmap,
 					AlignmentX = AlignmentX.Left,
 					AlignmentY = AlignmentY.Top,
-					Stretch = Stretch.None
+					Stretch = Stretch.Fill
 				};
 
-				if (!IgnorePixelScaling)
-				{
-					var scale = 1.0 / Dpi;
-					brush.Transform = new ScaleTransform
-					{
-						ScaleX = scale,
-						ScaleY = scale
-					};
-				}
-
 				Background = brush;
 			}
 

source/SkiaSharp.Views.Uno/SkiaSharp.Views.Uno.Wasm/SKXamlCanvas.Wasm.cs

@@ -22,9 +22,6 @@ namespace SkiaSharp.Views.UWP
 		partial void DoUnloaded() =>
 			FreeBitmap();
 
-		private SKSize GetCanvasSize() =>
-			new SKSize(pixelWidth, pixelHeight);
-
 		private void DoInvalidate()
 		{
 			if (designMode)
@@ -34,33 +31,36 @@ namespace SkiaSharp.Views.UWP
 				return;
 
 			if (ActualWidth <= 0 || ActualHeight <= 0)
+			{
+				CanvasSize = SKSize.Empty;
 				return;
-
-			int width, height;
-			if (IgnorePixelScaling)
-			{
-				width = (int)ActualWidth;
-				height = (int)ActualHeight;
-			}
-			else
-			{
-				width = (int)(ActualWidth * Dpi);
-				height = (int)(ActualHeight * Dpi);
 			}
 
-			var info = new SKImageInfo(width, height, SKImageInfo.PlatformColorType, SKAlphaType.Opaque);
-			CreateBitmap(info);
+			var info = CreateBitmap(out var unscaledSize, out var dpi);
 
 			using (var surface = SKSurface.Create(info, pixelsHandle.AddrOfPinnedObject(), info.RowBytes))
 			{
-				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+				var userVisibleSize = IgnorePixelScaling ? unscaledSize : info.Size;
+				CanvasSize = userVisibleSize;
+
+				if (IgnorePixelScaling)
+				{
+					var canvas = surface.Canvas;
+					canvas.Scale(dpi);
+					canvas.Save();
+				}
+
+				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 			}
 
 			WebAssemblyRuntime.InvokeJS($"SkiaSharp.Views.UWP.SKXamlCanvas.invalidateCanvas({pixelsHandle.AddrOfPinnedObject()}, \"{this.GetHtmlId()}\", {info.Width}, {pixelHeight});");
 		}
 
-		private unsafe void CreateBitmap(SKImageInfo info)
+		private SKImageInfo CreateBitmap(out SKSizeI unscaledSize, out float dpi)
 		{
+			var size = CreateSize(out unscaledSize, out dpi);
+			var info = new SKImageInfo(size.Width, size.Height, SKImageInfo.PlatformColorType, SKAlphaType.Opaque);
+
 			if (pixels == null || pixelWidth != info.Width || pixelHeight != info.Height)
 			{
 				FreeBitmap();
@@ -70,6 +70,8 @@ namespace SkiaSharp.Views.UWP
 				pixelWidth = info.Width;
 				pixelHeight = info.Height;
 			}
+
+			return info;
 		}
 
 		private void FreeBitmap()

source/SkiaSharp.Views.Uno/SkiaSharp.Views.Uno.iOS/SKXamlCanvas.iOS.cs

@@ -20,9 +20,6 @@ namespace SkiaSharp.Views.UWP
 		partial void DoUnloaded() =>
 			drawable?.Dispose();
 
-		private SKSize GetCanvasSize() =>
-			drawable?.Info.Size ?? SKSize.Empty;
-
 		private void DoInvalidate() =>
 			SetNeedsDisplay();
 
@@ -34,14 +31,30 @@ namespace SkiaSharp.Views.UWP
 				return;
 
 			// create the skia context
-			using var surface = drawable.CreateSurface(Bounds, IgnorePixelScaling ? 1 : ContentScaleFactor, out var info);
+			using var surface = drawable.CreateSurface(Bounds, ContentScaleFactor, out var info);
 			if (info.Width == 0 || info.Height == 0)
+			{
+				CanvasSize = SKSize.Empty;
 				return;
+			}
+
+			var userVisibleSize = IgnorePixelScaling
+				? new SKSizeI((int)Bounds.Width, (int)Bounds.Height)
+				: info.Size;
+
+			CanvasSize = userVisibleSize;
+
+			if (IgnorePixelScaling)
+			{
+				var skiaCanvas = surface.Canvas;
+				skiaCanvas.Scale((float)ContentScaleFactor);
+				skiaCanvas.Save();
+			}
 
 			using var ctx = UIGraphics.GetCurrentContext();
 
 			// draw on the image using SKiaSharp
-			OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+			OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 
 			// draw the surface to the context
 			drawable.DrawSurface(ctx, Bounds, info, surface);

source/SkiaSharp.Views.Uno/SkiaSharp.Views.Uno/SKXamlCanvas.cs

@@ -10,6 +10,8 @@ namespace SkiaSharp.Views.UWP
 {
 	public partial class SKXamlCanvas : Canvas
 	{
+		private const float DpiBase = 96.0f;
+
 		private static readonly DependencyProperty ProxyVisibilityProperty =
 			DependencyProperty.Register(
 				"ProxyVisibility",
@@ -45,7 +47,7 @@ namespace SkiaSharp.Views.UWP
 			SetBinding(ProxyVisibilityProperty, binding);
 		}
 
-		public SKSize CanvasSize => GetCanvasSize();
+		public SKSize CanvasSize { get; private set; }
 
 		public bool IgnorePixelScaling
 		{
@@ -77,7 +79,7 @@ namespace SkiaSharp.Views.UWP
 
 		private void OnDpiChanged(DisplayInformation sender, object args = null)
 		{
-			Dpi = sender.LogicalDpi / 96.0f;
+			Dpi = sender.LogicalDpi / DpiBase;
 			Invalidate();
 		}
 
@@ -123,5 +125,26 @@ namespace SkiaSharp.Views.UWP
 		partial void DoLoaded();
 
 		partial void DoUnloaded();
+
+		private SKSizeI CreateSize(out SKSizeI unscaledSize, out float dpi)
+		{
+			unscaledSize = SKSizeI.Empty;
+			dpi = (float)Dpi;
+
+			var w = ActualWidth;
+			var h = ActualHeight;
+
+			if (!IsPositive(w) || !IsPositive(h))
+				return SKSizeI.Empty;
+
+			unscaledSize = new SKSizeI((int)w, (int)h);
+			return new SKSizeI((int)(w * dpi), (int)(h * dpi));
+
+			static bool IsPositive(double value)
+			{
+				return !double.IsNaN(value) && !double.IsInfinity(value) && value > 0;
+			}
+		}
+
 	}
 }

source/SkiaSharp.Views/SkiaSharp.Views.Android/Resources/values/attrs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <declare-styleable name="SKCanvasView">
+        <attr name="ignorePixelScaling" format="boolean"/>
+    </declare-styleable>
+</resources>

source/SkiaSharp.Views/SkiaSharp.Views.Android/SKCanvasView.cs

@@ -13,6 +13,7 @@ namespace SkiaSharp.Views.Android
 		private bool ignorePixelScaling;
 		private bool designMode;
 		private SurfaceFactory surfaceFactory;
+		private float density;
 
 		public SKCanvasView(Context context)
 			: base(context)
@@ -23,13 +24,13 @@ namespace SkiaSharp.Views.Android
 		public SKCanvasView(Context context, IAttributeSet attrs)
 			: base(context, attrs)
 		{
-			Initialize();
+			Initialize(attrs);
 		}
 
 		public SKCanvasView(Context context, IAttributeSet attrs, int defStyleAttr)
 			: base(context, attrs, defStyleAttr)
 		{
-			Initialize();
+			Initialize(attrs);
 		}
 
 		protected SKCanvasView(IntPtr javaReference, JniHandleOwnership transfer)
@@ -38,21 +39,37 @@ namespace SkiaSharp.Views.Android
 			Initialize();
 		}
 
-		private void Initialize()
+		private void Initialize(IAttributeSet attrs = null)
 		{
 			designMode = !Extensions.IsValidEnvironment;
 			surfaceFactory = new SurfaceFactory();
+			density = Resources.DisplayMetrics.Density;
+
+			if (attrs != null)
+			{
+				using var a = Context.ObtainStyledAttributes(attrs, Resource.Styleable.SKCanvasView);
+
+				var N = a.IndexCount;
+				for (var i = 0; i < N; ++i)
+				{
+					var attr = a.GetIndex(i);
+					if (attr == Resource.Styleable.SKCanvasView_ignorePixelScaling)
+						IgnorePixelScaling = a.GetBoolean(attr, false);
+				}
+
+				a.Recycle();
+			}
 		}
 
-		public SKSize CanvasSize => surfaceFactory.Info.Size;
+		public SKSize CanvasSize { get; private set; }
 
 		public bool IgnorePixelScaling
 		{
-			get { return ignorePixelScaling; }
+			get => ignorePixelScaling;
 			set
 			{
 				ignorePixelScaling = value;
-				UpdateCanvasSize(Width, Height);
+				surfaceFactory.UpdateCanvasSize(Width, Height);
 				Invalidate();
 			}
 		}
@@ -74,10 +91,26 @@ namespace SkiaSharp.Views.Android
 			// create a skia surface
 			var surface = surfaceFactory.CreateSurface(out var info);
 			if (surface == null)
+			{
+				CanvasSize = SKSize.Empty;
 				return;
+			}
+
+			var userVisibleSize = IgnorePixelScaling
+				? new SKSizeI((int)(info.Width / density), (int)(info.Height / density))
+				: info.Size;
+
+			CanvasSize = userVisibleSize;
+
+			if (IgnorePixelScaling)
+			{
+				var skiaCanvas = surface.Canvas;
+				skiaCanvas.Scale(density);
+				skiaCanvas.Save();
+			}
 
 			// draw using SkiaSharp
-			OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+			OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 #pragma warning disable CS0618 // Type or member is obsolete
 			OnDraw(surface, info);
 #pragma warning restore CS0618 // Type or member is obsolete
@@ -91,7 +124,7 @@ namespace SkiaSharp.Views.Android
 			base.OnSizeChanged(w, h, oldw, oldh);
 
 			// update the info with the new sizes
-			UpdateCanvasSize(w, h);
+			surfaceFactory.UpdateCanvasSize(w, h);
 		}
 
 		public event EventHandler<SKPaintSurfaceEventArgs> PaintSurface;
@@ -118,7 +151,7 @@ namespace SkiaSharp.Views.Android
 		{
 			base.OnAttachedToWindow();
 
-			UpdateCanvasSize(Width, Height);
+			surfaceFactory.UpdateCanvasSize(Width, Height);
 			Invalidate();
 		}
 
@@ -128,8 +161,5 @@ namespace SkiaSharp.Views.Android
 
 			base.Dispose(disposing);
 		}
-
-		private void UpdateCanvasSize(int w, int h) =>
-			surfaceFactory.UpdateCanvasSize(w, h, IgnorePixelScaling ? Resources.DisplayMetrics.Density : 1);
 	}
 }

source/SkiaSharp.Views/SkiaSharp.Views.Android/SkiaSharp.Views.Android.csproj

@@ -12,4 +12,7 @@
   <ItemGroup>
     <Compile Include="..\SkiaSharp.Views.Shared\**\*.cs" Link="%(RecursiveDir)%(Filename)%(Extension)" />
   </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\*\*" />
+  </ItemGroup>
 </Project>

source/SkiaSharp.Views/SkiaSharp.Views.Apple/SKCanvasLayer.cs

@@ -30,11 +30,11 @@ namespace SkiaSharp.Views.Mac
 		[Obsolete("Use PaintSurface instead.")]
 		public ISKCanvasLayerDelegate SKDelegate { get; set; }
 
-		public SKSize CanvasSize => drawable.Info.Size;
+		public SKSize CanvasSize { get; private set; }
 
 		public bool IgnorePixelScaling
 		{
-			get { return ignorePixelScaling; }
+			get => ignorePixelScaling;
 			set
 			{
 				ignorePixelScaling = value;
@@ -47,13 +47,29 @@ namespace SkiaSharp.Views.Mac
 			base.DrawInContext(ctx);
 
 			// create the skia context
-			using (var surface = drawable.CreateSurface(Bounds, IgnorePixelScaling ? 1 : ContentsScale, out var info))
+			using (var surface = drawable.CreateSurface(Bounds, ContentsScale, out var info))
 			{
 				if (info.Width == 0 || info.Height == 0)
+				{
+					CanvasSize = SKSize.Empty;
 					return;
+				}
+
+				var userVisibleSize = IgnorePixelScaling
+					? new SKSizeI((int)Bounds.Width, (int)Bounds.Height)
+					: info.Size;
+
+				CanvasSize = userVisibleSize;
+
+				if (IgnorePixelScaling)
+				{
+					var skiaCanvas = surface.Canvas;
+					skiaCanvas.Scale((float)ContentsScale);
+					skiaCanvas.Save();
+				}
 
 				// draw on the image using SKiaSharp
-				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 #pragma warning disable CS0618 // Type or member is obsolete
 				DrawInSurface(surface, info);
 				SKDelegate?.DrawInSurface(surface, info);

source/SkiaSharp.Views/SkiaSharp.Views.AppleiOS/SKCanvasView.cs

@@ -66,11 +66,11 @@ namespace SkiaSharp.Views.iOS
 			drawable = new SKCGSurfaceFactory();
 		}
 
-		public SKSize CanvasSize => drawable?.Info.Size ?? SKSize.Empty;
+		public SKSize CanvasSize { get; private set; }
 
 		public bool IgnorePixelScaling
 		{
-			get { return ignorePixelScaling; }
+			get => ignorePixelScaling;
 			set
 			{
 				ignorePixelScaling = value;
@@ -86,15 +86,31 @@ namespace SkiaSharp.Views.iOS
 				return;
 
 			// create the skia context
-			using (var surface = drawable.CreateSurface(Bounds, IgnorePixelScaling ? 1 : ContentScaleFactor, out var info))
+			using (var surface = drawable.CreateSurface(Bounds, ContentScaleFactor, out var info))
 			{
 				if (info.Width == 0 || info.Height == 0)
+				{
+					CanvasSize = SKSize.Empty;
 					return;
+				}
+
+				var userVisibleSize = IgnorePixelScaling
+					? new SKSizeI((int)Bounds.Width, (int)Bounds.Height)
+					: info.Size;
+
+				CanvasSize = userVisibleSize;
+
+				if (IgnorePixelScaling)
+				{
+					var skiaCanvas = surface.Canvas;
+					skiaCanvas.Scale((float)ContentScaleFactor);
+					skiaCanvas.Save();
+				}
 
 				using (var ctx = UIGraphics.GetCurrentContext())
 				{
 					// draw on the image using SKiaSharp
-					OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+					OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 #pragma warning disable CS0618 // Type or member is obsolete
 					DrawInSurface(surface, info);
 #pragma warning restore CS0618 // Type or member is obsolete

source/SkiaSharp.Views/SkiaSharp.Views.Mac/SKCanvasView.cs

@@ -43,11 +43,11 @@ namespace SkiaSharp.Views.Mac
 			drawable = new SKCGSurfaceFactory();
 		}
 
-		public SKSize CanvasSize => drawable.Info.Size;
+		public SKSize CanvasSize { get; private set; }
 
 		public bool IgnorePixelScaling
 		{
-			get { return ignorePixelScaling; }
+			get => ignorePixelScaling;
 			set
 			{
 				ignorePixelScaling = value;
@@ -73,15 +73,31 @@ namespace SkiaSharp.Views.Mac
 			base.DrawRect(dirtyRect);
 
 			// create the skia context
-			using (var surface = drawable.CreateSurface(Bounds, IgnorePixelScaling ? 1 : Window.BackingScaleFactor, out var info))
+			using (var surface = drawable.CreateSurface(Bounds, Window.BackingScaleFactor, out var info))
 			{
 				if (info.Width == 0 || info.Height == 0)
+				{
+					CanvasSize = SKSize.Empty;
 					return;
+				}
+
+				var userVisibleSize = IgnorePixelScaling
+					? new SKSizeI((int)Bounds.Width, (int)Bounds.Height)
+					: info.Size;
+
+				CanvasSize = userVisibleSize;
+
+				if (IgnorePixelScaling)
+				{
+					var skiaCanvas = surface.Canvas;
+					skiaCanvas.Scale((float)Window.BackingScaleFactor);
+					skiaCanvas.Save();
+				}
 
 				using (var ctx = NSGraphicsContext.CurrentContext.CGContext)
 				{
 					// draw on the image using SKiaSharp
-					OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+					OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 #pragma warning disable CS0618 // Type or member is obsolete
 					DrawInSurface(surface, info);
 #pragma warning restore CS0618 // Type or member is obsolete

source/SkiaSharp.Views/SkiaSharp.Views.Shared/SKPaintSurfaceEventArgs.cs

@@ -23,13 +23,21 @@ namespace SkiaSharp.Views.Windows
 	public class SKPaintSurfaceEventArgs : EventArgs
 	{
 		public SKPaintSurfaceEventArgs(SKSurface surface, SKImageInfo info)
+			: this(surface, info, info)
+		{
+		}
+
+		public SKPaintSurfaceEventArgs(SKSurface surface, SKImageInfo info, SKImageInfo rawInfo)
 		{
 			Surface = surface;
 			Info = info;
+			RawInfo = rawInfo;
 		}
 
-		public SKSurface Surface { get; private set; }
+		public SKSurface Surface { get; }
 
-		public SKImageInfo Info { get; private set; }
+		public SKImageInfo Info { get; }
+
+		public SKImageInfo RawInfo { get; }
 	}
 }

source/SkiaSharp.Views/SkiaSharp.Views.Tizen/CustomRenderingView.cs

@@ -61,6 +61,8 @@ namespace SkiaSharp.Views.Tizen
 
 		protected abstract SKSizeI GetSurfaceSize();
 
+		protected virtual SKSizeI GetRawSurfaceSize() => GetSurfaceSize();
+
 		protected virtual void CreateDrawingSurface()
 		{
 			// empty on purpose
@@ -113,7 +115,7 @@ namespace SkiaSharp.Views.Tizen
 				// recreate the drawing surface to match the new size
 				DestroyDrawingSurface();
 
-				var size = GetSurfaceSize();
+				var size = GetRawSurfaceSize();
 				Evas.evas_object_image_size_set(evasImage, size.Width, size.Height);
 
 				CreateDrawingSurface();

source/SkiaSharp.Views/SkiaSharp.Views.Tizen/SKCanvasView.cs

@@ -8,6 +8,7 @@ namespace SkiaSharp.Views.Tizen
 	{
 		private bool ignorePixelScaling;
 		private SKImageInfo info;
+		private SKSizeI canvasSize;
 
 		public SKCanvasView(EvasObject parent)
 			: base(parent)
@@ -17,20 +18,23 @@ namespace SkiaSharp.Views.Tizen
 
 		public bool IgnorePixelScaling
 		{
-			get { return ignorePixelScaling; }
+			get => ignorePixelScaling;
 			set
 			{
 				if (ignorePixelScaling != value)
 				{
 					ignorePixelScaling = value;
 					OnResized();
+					Invalidate();
 				}
 			}
 		}
 
 		public event EventHandler<SKPaintSurfaceEventArgs> PaintSurface;
 
-		protected override SKSizeI GetSurfaceSize() => info.Size;
+		protected override SKSizeI GetSurfaceSize() => canvasSize;
+
+		protected override SKSizeI GetRawSurfaceSize() => info.Size;
 
 		protected virtual void OnDrawFrame(SKPaintSurfaceEventArgs e)
 		{
@@ -45,8 +49,15 @@ namespace SkiaSharp.Views.Tizen
 			// draw directly into the EFL image data
 			using (var surface = SKSurface.Create(info, Evas.evas_object_image_data_get(evasImage, true), info.RowBytes))
 			{
+				if (IgnorePixelScaling)
+				{
+					var skiaCanvas = surface.Canvas;
+					skiaCanvas.Scale((float)ScalingInfo.ScalingFactor);
+					skiaCanvas.Save();
+				}
+
 				// draw using SkiaSharp
-				OnDrawFrame(new SKPaintSurfaceEventArgs(surface, info));
+				OnDrawFrame(new SKPaintSurfaceEventArgs(surface, info.WithSize(canvasSize), info));
 				surface.Canvas.Flush();
 			}
 		}
@@ -56,15 +67,18 @@ namespace SkiaSharp.Views.Tizen
 			var w = info.Width;
 			var h = info.Height;
 
+			info.Width = geometry.Width;
+			info.Height = geometry.Height;
+
 			if (IgnorePixelScaling)
 			{
-				info.Width = (int)ScalingInfo.FromPixel(geometry.Width);
-				info.Height = (int)ScalingInfo.FromPixel(geometry.Height);
+				canvasSize.Width = (int)ScalingInfo.FromPixel(geometry.Width);
+				canvasSize.Height = (int)ScalingInfo.FromPixel(geometry.Height);
 			}
 			else
 			{
-				info.Width = geometry.Width;
-				info.Height = geometry.Height;
+				canvasSize.Width = geometry.Width;
+				canvasSize.Height = geometry.Height;
 			}
 
 			return (w != info.Width || h != info.Height);

source/SkiaSharp.Views/SkiaSharp.Views.Tizen/ScalingInfo.cs

@@ -23,14 +23,21 @@ namespace SkiaSharp.Views.Tizen
 		// allows to convert pixels to Android-style device-independent pixels
 		private static readonly Lazy<double> scalingFactor = new Lazy<double>(() => dpi.Value / 160.0);
 
+		private static double? scalingFactorOverride;
+
 		public static string Profile => profile.Value;
 
 		public static int Dpi => dpi.Value;
 
-		public static double ScalingFactor => scalingFactor.Value;
+		public static double ScalingFactor => scalingFactorOverride ?? scalingFactor.Value;
 
 		public static double FromPixel(double v) => v / ScalingFactor;
 
 		public static double ToPixel(double v) => v * ScalingFactor;
+
+		public static void SetScalingFactor(double? scalingFactor)
+		{
+			scalingFactorOverride = scalingFactor;
+		}
 	}
 }

source/SkiaSharp.Views/SkiaSharp.Views.UWP/SKXamlCanvas.cs

@@ -26,6 +26,8 @@ namespace SkiaSharp.Views.UWP
 {
 	public partial class SKXamlCanvas : Canvas
 	{
+		private const float DpiBase = 96.0f;
+
 		private static readonly DependencyProperty ProxyVisibilityProperty =
 			DependencyProperty.Register(
 				"ProxyVisibility",
@@ -65,7 +67,7 @@ namespace SkiaSharp.Views.UWP
 			SetBinding(ProxyVisibilityProperty, binding);
 		}
 
-		public SKSize CanvasSize => bitmap == null ? SKSize.Empty : new SKSize(bitmap.PixelWidth, bitmap.PixelHeight);
+		public SKSize CanvasSize { get; private set; }
 
 		public bool IgnorePixelScaling
 		{
@@ -105,7 +107,7 @@ namespace SkiaSharp.Views.UWP
 #else
 		private void OnDpiChanged(DisplayInformation sender, object args = null)
 		{
-			Dpi = sender.LogicalDpi / 96.0f;
+			Dpi = sender.LogicalDpi / DpiBase;
 			Invalidate();
 		}
 #endif
@@ -165,30 +167,43 @@ namespace SkiaSharp.Views.UWP
 			if (!isVisible)
 				return;
 
-			var info = CreateBitmap();
+			var info = CreateBitmap(out var unscaledSize, out var dpi);
 
 			if (info.Width <= 0 || info.Height <= 0)
+			{
+				CanvasSize = SKSize.Empty;
 				return;
+			}
+
+			var userVisibleSize = IgnorePixelScaling ? unscaledSize : info.Size;
+			CanvasSize = userVisibleSize;
 
 			using (var surface = SKSurface.Create(info, pixels, info.RowBytes))
 			{
-				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+				if (IgnorePixelScaling)
+				{
+					var canvas = surface.Canvas;
+					canvas.Scale(dpi);
+					canvas.Save();
+				}
+
+				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 			}
 			bitmap.Invalidate();
 		}
 
-		private SKSizeI CreateSize()
+		private SKSizeI CreateSize(out SKSizeI unscaledSize, out float dpi)
 		{
+			unscaledSize = SKSizeI.Empty;
+			dpi = (float)Dpi;
+
 			var w = ActualWidth;
 			var h = ActualHeight;
 
 			if (!IsPositive(w) || !IsPositive(h))
 				return SKSizeI.Empty;
 
-			if (IgnorePixelScaling)
-				return new SKSizeI((int)w, (int)h);
-
-			var dpi = Dpi;
+			unscaledSize = new SKSizeI((int)w, (int)h);
 			return new SKSizeI((int)(w * dpi), (int)(h * dpi));
 
 			static bool IsPositive(double value)
@@ -197,9 +212,9 @@ namespace SkiaSharp.Views.UWP
 			}
 		}
 
-		private SKImageInfo CreateBitmap()
+		private SKImageInfo CreateBitmap(out SKSizeI unscaledSize, out float dpi)
 		{
-			var size = CreateSize();
+			var size = CreateSize(out unscaledSize, out dpi);
 			var info = new SKImageInfo(size.Width, size.Height, SKImageInfo.PlatformColorType, SKAlphaType.Premul);
 
 			if (bitmap?.PixelWidth != info.Width || bitmap?.PixelHeight != info.Height)
@@ -215,17 +230,8 @@ namespace SkiaSharp.Views.UWP
 					ImageSource = bitmap,
 					AlignmentX = AlignmentX.Left,
 					AlignmentY = AlignmentY.Top,
-					Stretch = Stretch.None
+					Stretch = Stretch.Fill
 				};
-				if (!IgnorePixelScaling)
-				{
-					var scale = 1.0 / Dpi;
-					brush.Transform = new ScaleTransform
-					{
-						ScaleX = scale,
-						ScaleY = scale
-					};
-				}
 				Background = brush;
 			}
 

source/SkiaSharp.Views/SkiaSharp.Views.WPF/SKElement.cs

@@ -15,6 +15,8 @@ namespace SkiaSharp.Views.WPF
 	[DefaultProperty("Name")]
 	public class SKElement : FrameworkElement
 	{
+		private const double BitmapDpi = 96.0;
+
 		private readonly bool designMode;
 
 		private WriteableBitmap bitmap;
@@ -25,15 +27,11 @@ namespace SkiaSharp.Views.WPF
 			designMode = DesignerProperties.GetIsInDesignMode(this);
 		}
 
-		[Bindable(false)]
-		[Browsable(false)]
-		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-		[EditorBrowsable(EditorBrowsableState.Never)]
-		public SKSize CanvasSize => bitmap == null ? SKSize.Empty : new SKSize(bitmap.PixelWidth, bitmap.PixelHeight);
+		public SKSize CanvasSize { get; private set; }
 
 		public bool IgnorePixelScaling
 		{
-			get { return ignorePixelScaling; }
+			get => ignorePixelScaling;
 			set
 			{
 				ignorePixelScaling = value;
@@ -54,7 +52,11 @@ namespace SkiaSharp.Views.WPF
 			if (Visibility != Visibility.Visible || PresentationSource.FromVisual(this) == null)
 				return;
 
-			var size = CreateSize(out var scaleX, out var scaleY);
+			var size = CreateSize(out var unscaledSize, out var scaleX, out var scaleY);
+			var userVisibleSize = IgnorePixelScaling ? unscaledSize : size;
+
+			CanvasSize = userVisibleSize;
+
 			if (size.Width <= 0 || size.Height <= 0)
 				return;
 
@@ -63,14 +65,21 @@ namespace SkiaSharp.Views.WPF
 			// reset the bitmap if the size has changed
 			if (bitmap == null || info.Width != bitmap.PixelWidth || info.Height != bitmap.PixelHeight)
 			{
-				bitmap = new WriteableBitmap(info.Width, size.Height, 96 * scaleX, 96 * scaleY, PixelFormats.Pbgra32, null);
+				bitmap = new WriteableBitmap(info.Width, size.Height, BitmapDpi * scaleX, BitmapDpi * scaleY, PixelFormats.Pbgra32, null);
 			}
 
 			// draw on the bitmap
 			bitmap.Lock();
 			using (var surface = SKSurface.Create(info, bitmap.BackBuffer, bitmap.BackBufferStride))
 			{
-				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+				if (IgnorePixelScaling)
+				{
+					var canvas = surface.Canvas;
+					canvas.Scale(scaleX, scaleY);
+					canvas.Save();
+				}
+
+				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
 			}
 
 			// draw the bitmap to the screen
@@ -92,10 +101,11 @@ namespace SkiaSharp.Views.WPF
 			InvalidateVisual();
 		}
 
-		private SKSizeI CreateSize(out double scaleX, out double scaleY)
+		private SKSizeI CreateSize(out SKSizeI unscaledSize, out float scaleX, out float scaleY)
 		{
-			scaleX = 1.0;
-			scaleY = 1.0;
+			unscaledSize = SKSizeI.Empty;
+			scaleX = 1.0f;
+			scaleY = 1.0f;
 
 			var w = ActualWidth;
 			var h = ActualHeight;
@@ -103,12 +113,11 @@ namespace SkiaSharp.Views.WPF
 			if (!IsPositive(w) || !IsPositive(h))
 				return SKSizeI.Empty;
 
-			if (IgnorePixelScaling)
-				return new SKSizeI((int)w, (int)h);
+			unscaledSize = new SKSizeI((int)w, (int)h);
 
 			var m = PresentationSource.FromVisual(this).CompositionTarget.TransformToDevice;
-			scaleX = m.M11;
-			scaleY = m.M22;
+			scaleX = (float)m.M11;
+			scaleY = (float)m.M22;
 			return new SKSizeI((int)(w * scaleX), (int)(h * scaleY));
 
 			bool IsPositive(double value)

source/SkiaSharp.Views/SkiaSharp.Views.WindowsForms/SKControl.cs

@@ -22,10 +22,6 @@ namespace SkiaSharp.Views.Desktop
 			designMode = DesignMode || LicenseManager.UsageMode == LicenseUsageMode.Designtime;
 		}
 
-		[Bindable(false)]
-		[Browsable(false)]
-		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-		[EditorBrowsable(EditorBrowsableState.Never)]
 		public SKSize CanvasSize => bitmap == null ? SKSize.Empty : new SKSize(bitmap.Width, bitmap.Height);
 
 		[Category("Appearance")]

source/SkiaSharp.Views/SkiaSharp.Views.WindowsForms/SKGLControl.cs

@@ -49,16 +49,8 @@ namespace SkiaSharp.Views.Desktop
 			ResizeRedraw = true;
 		}
 
-		[Bindable(false)]
-		[Browsable(false)]
-		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-		[EditorBrowsable(EditorBrowsableState.Never)]
 		public SKSize CanvasSize => lastSize;
 
-		[Bindable(false)]
-		[Browsable(false)]
-		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-		[EditorBrowsable(EditorBrowsableState.Never)]
 		public GRContext GRContext => grContext;
 
 		[Category("Appearance")]

source/SkiaSharp.Views/SkiaSharp.Views/SkiaSharp.Views.csproj

@@ -41,6 +41,7 @@
     <None Include="..\SkiaSharp.Views.Mac\**\*.cs" Link="Platform\macOS\%(RecursiveDir)%(Filename)%(Extension)" />
     <!-- Android -->
     <None Include="..\SkiaSharp.Views.Android\**\*.cs" Link="Platform\Android\%(RecursiveDir)%(Filename)%(Extension)" />
+    <None Include="..\SkiaSharp.Views.Android\Resources\*\*" Link="Platform\Android\Resources\%(RecursiveDir)%(Filename)%(Extension)" />
     <!-- local platforms -->
     <Compile Remove="Platform\**" />
     <None Include="Platform\**\*.cs" />
@@ -69,6 +70,7 @@
     <!-- Android -->
     <Compile Include="..\SkiaSharp.Views.Android\**\*.cs" Link="Platform\Android\%(RecursiveDir)%(Filename)%(Extension)" />
     <Compile Include="Platform\Android\**\*.cs" />
+    <AndroidResource Include="..\SkiaSharp.Views.Android\Resources\*\*" Link="Platform\Android\Resources\%(RecursiveDir)%(Filename)%(Extension)" />
   </ItemGroup>
   <ItemGroup>
     <Compile Remove="..\*\bin\**;..\*\obj\**" />