Added the code for Desktop

views/SkiaSharp.Views.Desktop/SKControl.cs

@@ -0,0 +1,83 @@
+using System;
+using System.ComponentModel;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.Windows.Forms;
+
+namespace SkiaSharp.Views
+{
+	public class SKControl : Control
+	{
+		private readonly bool designMode;
+
+		private Bitmap bitmap;
+
+		public SKControl()
+		{
+			DoubleBuffered = true;
+			SetStyle(ControlStyles.ResizeRedraw, true);
+
+			designMode = DesignMode || LicenseManager.UsageMode == LicenseUsageMode.Designtime;
+		}
+
+		public event EventHandler<SKPaintSurfaceEventArgs> PaintSurface;
+
+		protected override void OnPaint(PaintEventArgs e)
+		{
+			if (designMode)
+				return;
+
+			base.OnPaint(e);
+
+			// get the bitmap
+			CreateBitmap();
+			var data = bitmap.LockBits(new Rectangle(0, 0, Width, Height), ImageLockMode.WriteOnly, bitmap.PixelFormat);
+
+			// create the surface
+			var info = new SKImageInfo(Width, Height, SKImageInfo.PlatformColorType, SKAlphaType.Premul);
+			using (var surface = SKSurface.Create(info, data.Scan0, data.Stride))
+			{
+				// start drawing
+				OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
+
+				surface.Canvas.Flush();
+			}
+
+			// write the bitmap to the graphics
+			bitmap.UnlockBits(data);
+			e.Graphics.DrawImage(bitmap, 0, 0);
+		}
+
+		protected virtual void OnPaintSurface(SKPaintSurfaceEventArgs e)
+		{
+			// invoke the event
+			PaintSurface?.Invoke(this, e);
+		}
+		
+		protected override void Dispose(bool disposing)
+		{
+			base.Dispose(disposing);
+
+			FreeBitmap();
+		}
+
+		private void CreateBitmap()
+		{
+			if (bitmap == null || bitmap.Width != Width || bitmap.Height != Height)
+			{
+				FreeBitmap();
+
+				bitmap = new Bitmap(Width, Height, PixelFormat.Format32bppPArgb);
+			}
+		}
+
+		private void FreeBitmap()
+		{
+			if (bitmap != null)
+			{
+				bitmap.Dispose();
+				bitmap = null;
+			}
+		}
+	}
+}

views/SkiaSharp.Views.Desktop/SKGLControl.cs

@@ -0,0 +1,75 @@
+using System;
+using System.ComponentModel;
+using System.Windows.Forms;
+using OpenTK;
+
+namespace SkiaSharp.Views
+{
+	public class SKGLControl : GLControl
+	{
+		private readonly bool designMode;
+
+		private GRContext grContext;
+		private GRBackendRenderTargetDesc renderTarget;
+
+		public SKGLControl()
+		{
+			designMode = DesignMode || LicenseManager.UsageMode == LicenseUsageMode.Designtime;
+
+			ResizeRedraw = true;
+		}
+
+		public event EventHandler<SKPaintGLSurfaceEventArgs> PaintSurface;
+		
+		protected override void OnPaint(PaintEventArgs e)
+		{
+			if (designMode)
+			{
+				e.Graphics.Clear(BackColor);
+				return;
+			}
+
+			base.OnPaint(e);
+
+			// create the contexts if not done already
+			if (grContext == null)
+			{
+				var glInterface = GRGlInterface.CreateNativeInterface();
+				grContext = GRContext.Create(GRBackend.OpenGL, glInterface);
+
+				// get initial details
+				renderTarget = SKGLDrawable.CreateRenderTarget();
+			}
+
+			// update to the latest dimensions
+			renderTarget.Width = Width;
+			renderTarget.Height = Height;
+
+			// create the surface
+			using (var surface = SKSurface.Create(grContext, renderTarget))
+			{
+				// start drawing
+				OnPaintSurface(new SKPaintGLSurfaceEventArgs(surface, renderTarget));
+
+				surface.Canvas.Flush();
+			}
+
+			// update the control
+			SwapBuffers();
+		}
+
+		protected virtual void OnPaintSurface(SKPaintGLSurfaceEventArgs e)
+		{
+			// invoke the event
+			PaintSurface?.Invoke(this, e);
+		}
+
+		protected override void Dispose(bool disposing)
+		{
+			base.Dispose(disposing);
+
+			// clean up
+			grContext.Dispose();
+		}
+	}
+}

views/SkiaSharp.Views.Desktop/SKPaintGLSurfaceEventArgs.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace SkiaSharp.Views
+{
+	public class SKPaintGLSurfaceEventArgs : EventArgs
+	{
+		public SKPaintGLSurfaceEventArgs(SKSurface surface, GRBackendRenderTargetDesc renderTarget)
+		{
+			Surface = surface;
+			RenderTarget = renderTarget;
+		}
+
+		public SKSurface Surface { get; private set; }
+
+		public GRBackendRenderTargetDesc RenderTarget { get; private set; }
+	}
+}

views/SkiaSharp.Views.Desktop/SKPaintSurfaceEventArgs.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace SkiaSharp.Views
+{
+	public class SKPaintSurfaceEventArgs : EventArgs
+	{
+		public SKPaintSurfaceEventArgs(SKSurface surface, SKImageInfo info)
+		{
+			Surface = surface;
+			Info = info;
+		}
+
+		public SKSurface Surface { get; private set; }
+
+		public SKImageInfo Info { get; private set; }
+	}
+}

views/SkiaSharp.Views.Desktop/SkiaSharp.Views.Desktop.csproj

@@ -20,7 +20,7 @@
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
     <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DefineConstants>TRACE;DEBUG;__DESKTOP__</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
@@ -28,30 +28,44 @@
     <DebugType>pdbonly</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
+    <DefineConstants>TRACE;__DESKTOP__</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="OpenTK, Version=1.1.0.0, Culture=neutral, PublicKeyToken=bad199fe84eb3df4, processorArchitecture=MSIL">
+      <HintPath>..\packages\OpenTK.1.1.2349.61993\lib\NET40\OpenTK.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="OpenTK.GLControl, Version=1.1.0.0, Culture=neutral, PublicKeyToken=bad199fe84eb3df4, processorArchitecture=MSIL">
+      <HintPath>..\packages\OpenTK.GLControl.1.1.2349.61993\lib\NET40\OpenTK.GLControl.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="SkiaSharp, Version=1.54.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756, processorArchitecture=MSIL">
       <HintPath>..\packages\SkiaSharp.1.54.0\lib\net45\SkiaSharp.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Windows.Forms" />
     <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Data" />
-    <Reference Include="System.Net.Http" />
-    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="SKControl.cs">
+      <SubType>Component</SubType>
+    </Compile>
+    <Compile Include="SKGLControl.cs">
+      <SubType>UserControl</SubType>
+    </Compile>
+    <Compile Include="SKPaintGLSurfaceEventArgs.cs" />
+    <Compile Include="SKPaintSurfaceEventArgs.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="packages.config" />
   </ItemGroup>
+  <Import Project="..\SkiaSharp.Views.OpenTK\SkiaSharp.Views.OpenTK.projitems" Label="Shared" />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <Import Project="..\packages\SkiaSharp.1.54.0\build\net45\SkiaSharp.targets" Condition="Exists('..\packages\SkiaSharp.1.54.0\build\net45\SkiaSharp.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">

views/SkiaSharp.Views.Desktop/packages.config

@@ -1,4 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="OpenTK" version="1.1.2349.61993" targetFramework="net45" />
+  <package id="OpenTK.GLControl" version="1.1.2349.61993" targetFramework="net45" />
   <package id="SkiaSharp" version="1.54.0" targetFramework="net45" />
 </packages>