Merge pull request #320 from cra0zy/otkwidget

GLWidget for Gtk 2 and 3

OpenTK.sln

@@ -1,5 +1,6 @@
+
 Microsoft Visual Studio Solution File, Format Version 11.00
-# Visual Studio 2012
+# Visual Studio 2010
 VisualStudioVersion = 12.0.21005.1
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenTK", "Source\OpenTK\OpenTK.csproj", "{A37A7E14-0000-0000-0000-000000000000}"
@@ -79,6 +80,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Test.API.Desktop", "Source\
 		{75DC22B1-113F-4A66-96B9-2FF8208C10E8} = {75DC22B1-113F-4A66-96B9-2FF8208C10E8}
 	EndProjectSection
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenTK.GLWidget", "Source\GLWidget\OpenTK.GLWidget.csproj", "{A625BE87-0000-0000-0000-000000000000}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -158,15 +161,30 @@ Global
 		{A37A7E14-0000-0000-0000-000000000000}.Release|Any CPU.Build.0 = Release|Any CPU
 		{A37A7E14-0000-0000-0000-000000000000}.ReleaseMinimal|Any CPU.ActiveCfg = ReleaseMinimal|Any CPU
 		{A37A7E14-0000-0000-0000-000000000000}.ReleaseMinimal|Any CPU.Build.0 = ReleaseMinimal|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.DebugMinimal|Any CPU.ActiveCfg = DebugMinimal|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.DebugMinimal|Any CPU.Build.0 = DebugMinimal|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.Documentation|Any CPU.ActiveCfg = Documentation|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.Documentation|Any CPU.Build.0 = Documentation|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.Nsis|Any CPU.ActiveCfg = Nsis|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.Nsis|Any CPU.Build.0 = Nsis|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.ReleaseMinimal|Any CPU.ActiveCfg = ReleaseMinimal|Any CPU
+		{A625BE87-0000-0000-0000-000000000000}.ReleaseMinimal|Any CPU.Build.0 = ReleaseMinimal|Any CPU
 		{A625BE88-0000-0000-0000-000000000000}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{A625BE88-0000-0000-0000-000000000000}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{A625BE88-0000-0000-0000-000000000000}.DebugMinimal|Any CPU.ActiveCfg = Debug|Any CPU
+		{A625BE88-0000-0000-0000-000000000000}.DebugMinimal|Any CPU.ActiveCfg = DebugMinimal|Any CPU
+		{A625BE88-0000-0000-0000-000000000000}.DebugMinimal|Any CPU.Build.0 = DebugMinimal|Any CPU
 		{A625BE88-0000-0000-0000-000000000000}.Documentation|Any CPU.ActiveCfg = Documentation|Any CPU
+		{A625BE88-0000-0000-0000-000000000000}.Documentation|Any CPU.Build.0 = Documentation|Any CPU
 		{A625BE88-0000-0000-0000-000000000000}.Nsis|Any CPU.ActiveCfg = Nsis|Any CPU
 		{A625BE88-0000-0000-0000-000000000000}.Nsis|Any CPU.Build.0 = Nsis|Any CPU
 		{A625BE88-0000-0000-0000-000000000000}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A625BE88-0000-0000-0000-000000000000}.Release|Any CPU.Build.0 = Release|Any CPU
 		{A625BE88-0000-0000-0000-000000000000}.ReleaseMinimal|Any CPU.ActiveCfg = ReleaseMinimal|Any CPU
+		{A625BE88-0000-0000-0000-000000000000}.ReleaseMinimal|Any CPU.Build.0 = ReleaseMinimal|Any CPU
 		{ADC34399-7613-44D2-90B2-19250F06FE7A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{ADC34399-7613-44D2-90B2-19250F06FE7A}.DebugMinimal|Any CPU.ActiveCfg = DebugMinimal|Any CPU
 		{ADC34399-7613-44D2-90B2-19250F06FE7A}.Documentation|Any CPU.ActiveCfg = Documentation|Any CPU
@@ -210,10 +228,10 @@ Global
 		{C4DDD20F-CB4E-43F4-A75C-4A3D668E1F99}.Release|Any CPU.Build.0 = Release|Any CPU
 		{C4DDD20F-CB4E-43F4-A75C-4A3D668E1F99}.ReleaseMinimal|Any CPU.ActiveCfg = ReleaseMinimal|Any CPU
 	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
 	GlobalSection(MonoDevelopProperties) = preSolution
 		StartupItem = Source\Examples\OpenTK.Examples.csproj
 	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
 EndGlobal

Source/Examples/OpenTK.Examples.csproj

@@ -2,7 +2,7 @@
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
   <PropertyGroup>
     <ProjectType>Local</ProjectType>
-    <ProductVersion>8.0.50727</ProductVersion>
+    <ProductVersion>8.0.30703</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{868E37B3-0000-0000-0000-000000000000}</ProjectGuid>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -15,7 +15,6 @@
     <DefaultHTMLPageLayout>Grid</DefaultHTMLPageLayout>
     <DefaultTargetSchema>IE50</DefaultTargetSchema>
     <DelaySign>false</DelaySign>
-    <TargetFrameworkVersion>v2.0</TargetFrameworkVersion>
     <OutputType>WinExe</OutputType>
     <AppDesignerFolder>
     </AppDesignerFolder>
@@ -81,6 +80,7 @@
     <WarningLevel>4</WarningLevel>
     <Optimize>True</Optimize>
     <DefineConstants>TRACE;</DefineConstants>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Nsis|AnyCPU'">
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
@@ -122,6 +122,11 @@
     <Reference Include="System.Xml">
       <Name>System.Xml</Name>
     </Reference>
+    <Reference Include="atk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
+    <Reference Include="gdk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
+    <Reference Include="glib-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
+    <Reference Include="glade-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
+    <Reference Include="gtk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\OpenTK\OpenTK.csproj">
@@ -129,8 +134,12 @@
       <Project>{A37A7E14-0000-0000-0000-000000000000}</Project>
     </ProjectReference>
     <ProjectReference Include="..\GLControl\OpenTK.GLControl.csproj">
-      <Name>OpenTK.GLControl</Name>
       <Project>{A625BE88-0000-0000-0000-000000000000}</Project>
+      <Name>OpenTK.GLControl</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\GLWidget\OpenTK.GLWidget.csproj">
+      <Project>{A625BE87-0000-0000-0000-000000000000}</Project>
+      <Name>OpenTK.GLWidget</Name>
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
@@ -564,6 +573,7 @@
     </None>
     <Compile Include="OpenTK\Test\ExternalContext.cs" />
     <Compile Include="OpenTK\Test\PointToClient.cs" />
+    <Compile Include="OpenTK\GLWidget\GLWidgetSimple.cs" />
   </ItemGroup>
   <ItemGroup>
     <BootstrapperPackage Include="Microsoft.Net.Client.3.5">
@@ -672,4 +682,7 @@
     <ConfigurationOverrideFile>
     </ConfigurationOverrideFile>
   </PropertyGroup>
+  <ItemGroup>
+    <Folder Include="OpenTK\GLWidget\" />
+  </ItemGroup>
 </Project>

Source/Examples/OpenTK/GLWidget/GLWidgetSimple.cs

@@ -0,0 +1,152 @@
+// This code was written for the OpenTK library and has been released
+// to the Public Domain.
+// It is provided "as is" without express or implied warranty of any kind.
+
+using System;
+using System.Drawing;
+using System.Threading;
+
+using Gtk;
+
+using OpenTK;
+using OpenTK.Graphics;
+using OpenTK.Graphics.OpenGL;
+
+namespace Examples.GLWidget
+{
+    [Example("GLWidget Simple", ExampleCategory.OpenTK, "GLWidget", 1, Documentation="GLWidgetSimple")]
+    public class SimpleWindow : Window
+    {
+        VBox vbox1;
+        HBox hbox1;
+        Button button_red, button_green, button_blue;
+        OpenTK.GLWidget glwidget1;
+
+        public SimpleWindow()
+            : base(WindowType.Toplevel)
+        {
+            Build();
+        }
+
+        private void Build()
+        {
+            this.Title = "Sample GLWidget Example";
+            this.DefaultWidth = 800;
+            this.DefaultHeight = 600;
+
+            vbox1 = new VBox();
+
+            glwidget1 = new OpenTK.GLWidget();
+            glwidget1.Initialized += Glwidget1_Initialized;
+
+            // do note that if you are placing the widget inside a container you have to do it after initalization
+            var t = new Thread(new ThreadStart(delegate {
+                Thread.Sleep(50);
+
+                Application.Invoke(delegate {
+                    vbox1.PackStart(glwidget1, true, true, 1);
+                    glwidget1.Show();
+                });
+            }));
+            t.Start();
+
+            hbox1 = new HBox();
+
+            button_blue = new Button("Clear Blue");
+            button_blue.Clicked += Button_blue_Clicked;
+            hbox1.PackStart(button_blue, true, true, 0);
+
+            button_green = new Button("Clear Green");
+            button_green.Clicked += Button_green_Clicked;
+            hbox1.PackStart(button_green, true, true, 1);
+
+            button_red = new Button("Clear Red");
+            button_red.Clicked += Button_red_Clicked;
+            hbox1.PackStart(button_red, true, true, 2);
+
+            vbox1.PackStart(hbox1, false, false, 0);
+
+            this.Add(vbox1);
+            this.ShowAll();
+
+            this.DeleteEvent += OnDeleteEvent;
+        }
+
+        #region Events
+
+        protected void Glwidget1_Initialized(object sender, EventArgs e)
+        {
+            GL.ClearColor(1.0f, 1.0f, 1.0f, 1.0f);
+
+            GL.MatrixMode(MatrixMode.Projection);
+            GL.LoadIdentity();
+            GL.Ortho(-1.0, 1.0, -1.0, 1.0, 0.0, 4.0);
+
+            glwidget1.SizeAllocated += Glwidget1_SizeAllocated;
+            glwidget1.RenderFrame += Glwidget1_RenderFrame;
+        }
+
+        protected void Glwidget1_SizeAllocated(object o, SizeAllocatedArgs args)
+        {
+            GL.Viewport(0, 0, args.Allocation.Width, args.Allocation.Height);
+        }
+
+        protected void Glwidget1_RenderFrame(object sender, EventArgs e)
+        {
+            GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
+
+            GL.Begin(PrimitiveType.Triangles);
+
+            GL.Color3(Color.MidnightBlue);
+            GL.Vertex2(-1.0f, 1.0f);
+            GL.Color3(Color.SpringGreen);
+            GL.Vertex2(0.0f, -1.0f);
+            GL.Color3(Color.Ivory);
+            GL.Vertex2(1.0f, 1.0f);
+
+            GL.End();
+
+            GraphicsContext.CurrentContext.SwapBuffers();
+        }
+
+        protected void Button_blue_Clicked(object sender, EventArgs e)
+        {
+            GL.ClearColor(Color.RoyalBlue);
+            glwidget1.QueueDraw();
+        }
+
+        protected void Button_green_Clicked(object sender, EventArgs e)
+        {
+            GL.ClearColor(Color.ForestGreen);
+            glwidget1.QueueDraw();
+        }
+
+        protected void Button_red_Clicked(object sender, EventArgs e)
+        {
+            GL.ClearColor(Color.Crimson);
+            glwidget1.QueueDraw();
+        }
+
+        protected void OnDeleteEvent(object sender, DeleteEventArgs a)
+        {
+            Application.Quit();
+            a.RetVal = true;
+        }
+
+        #endregion
+
+        #region public static void Main()
+
+        public static void Main(string[] args)
+        {
+            Application.Init();
+
+            SimpleWindow win = new SimpleWindow();
+            win.Show();
+
+            Application.Run();
+        }
+
+        #endregion
+    }
+}

Source/GLWidget/GLWidget.cs

@@ -0,0 +1,575 @@
+#region License
+//
+// The Open Toolkit Library License
+//
+// Copyright (c) 2006 - 2009 the Open Toolkit library, except where noted.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights to 
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do
+// so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Security;
+using System.Threading;
+using System.ComponentModel;
+
+using OpenTK.Graphics;
+using OpenTK.Platform;
+using OpenTK;
+
+using Gtk;
+
+namespace OpenTK
+{
+    [ToolboxItem(true)]
+    public class GLWidget: DrawingArea, IDisposable
+    {
+
+        #region Static attrs.
+
+        static int _GraphicsContextCount;
+        static bool _SharedContextInitialized = false;
+
+        #endregion
+
+        #region Attributes
+
+        IGraphicsContext _GraphicsContext;
+        IWindowInfo _WindowInfo;
+        GraphicsContextFlags _GraphicsContextFlags;
+        bool _Initialized = false;
+
+        #endregion
+
+        #region Properties
+
+        /// <summary>Use a single buffer versus a double buffer.</summary>
+        [Browsable(true)]
+        public bool SingleBuffer { get; set; }
+
+        /// <summary>Color Buffer Bits-Per-Pixel</summary>
+        public int ColorBPP { get; set; }
+
+        /// <summary>Accumulation Buffer Bits-Per-Pixel</summary>
+        public int AccumulatorBPP { get; set; }
+
+        /// <summary>Depth Buffer Bits-Per-Pixel</summary>
+        public int DepthBPP { get; set; }
+
+        /// <summary>Stencil Buffer Bits-Per-Pixel</summary>
+        public int StencilBPP { get; set; }
+
+        /// <summary>Number of samples</summary>
+        public int Samples { get; set; }
+
+        /// <summary>Indicates if steropic renderering is enabled</summary>
+        public bool Stereo { get; set; }
+
+        /// <summary>The major version of OpenGL to use.</summary>
+        public int GlVersionMajor { get; set; }
+
+        /// <summary>The minor version of OpenGL to use.</summary>
+        public int GlVersionMinor { get; set; }
+
+        public GraphicsContextFlags GraphicsContextFlags
+        {
+            get
+            { 
+                return _GraphicsContextFlags; 
+            }
+            set
+            { 
+                _GraphicsContextFlags = value; 
+            }
+        }
+
+        #endregion
+
+        #region Construction/Destruction
+
+        /// <summary>Constructs a new GLWidget.</summary>
+        public GLWidget()
+            : this(GraphicsMode.Default)
+        { 
+        }
+
+        /// <summary>Constructs a new GLWidget using a given GraphicsMode</summary>
+        public GLWidget(GraphicsMode graphicsMode)
+            : this(graphicsMode, 1, 0, GraphicsContextFlags.Default)
+        { 
+        }
+
+        /// <summary>Constructs a new GLWidget</summary>
+        public GLWidget(GraphicsMode graphicsMode, int glVersionMajor, int glVersionMinor, GraphicsContextFlags graphicsContextFlags)
+        {
+            this.DoubleBuffered = false;
+
+            SingleBuffer = graphicsMode.Buffers == 1;
+            ColorBPP = graphicsMode.ColorFormat.BitsPerPixel;
+            AccumulatorBPP = graphicsMode.AccumulatorFormat.BitsPerPixel;
+            DepthBPP = graphicsMode.Depth;
+            StencilBPP = graphicsMode.Stencil;
+            Samples = graphicsMode.Samples;
+            Stereo = graphicsMode.Stereo;
+
+            GlVersionMajor = glVersionMajor;
+            GlVersionMinor = glVersionMinor;
+            GraphicsContextFlags = graphicsContextFlags;
+        }
+
+        ~GLWidget()
+        { 
+            Dispose(false); 
+        }
+
+#if GTK3
+        public override void Destroy() {
+#else
+        public override void Dispose()
+        {
+#endif
+            GC.SuppressFinalize(this);
+            Dispose(true);
+#if GTK3
+            base.Destroy();
+#else
+            base.Dispose();
+#endif
+        }
+
+        public virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                _GraphicsContext.MakeCurrent(_WindowInfo);
+                OnShuttingDown();
+                if (GraphicsContext.ShareContexts && (Interlocked.Decrement(ref _GraphicsContextCount) == 0))
+                {
+                    OnGraphicsContextShuttingDown();
+                    _SharedContextInitialized = false;
+                }
+                _GraphicsContext.Dispose();
+            }
+        }
+
+        #endregion
+
+        #region New Events
+
+        // Called when the first GraphicsContext is created in the case of GraphicsContext.ShareContexts == True;
+        public static event EventHandler GraphicsContextInitialized;
+
+        static void OnGraphicsContextInitialized()
+        {
+            if (GraphicsContextInitialized != null)
+                GraphicsContextInitialized(null, EventArgs.Empty); 
+        }
+
+        // Called when the first GraphicsContext is being destroyed in the case of GraphicsContext.ShareContexts == True;
+        public static event EventHandler GraphicsContextShuttingDown;
+
+        static void OnGraphicsContextShuttingDown()
+        { 
+            if (GraphicsContextShuttingDown != null)
+                GraphicsContextShuttingDown(null, EventArgs.Empty); 
+        }
+
+        // Called when this GLWidget has a valid GraphicsContext
+        public event EventHandler Initialized;
+
+        protected virtual void OnInitialized()
+        { 
+            if (Initialized != null)
+                Initialized(this, EventArgs.Empty); 
+        }
+
+        // Called when this GLWidget needs to render a frame
+        public event EventHandler RenderFrame;
+
+        protected virtual void OnRenderFrame()
+        { 
+            if (RenderFrame != null)
+                RenderFrame(this, EventArgs.Empty); 
+        }
+
+        // Called when this GLWidget is being Disposed
+        public event EventHandler ShuttingDown;
+
+        protected virtual void OnShuttingDown()
+        { 
+            if (ShuttingDown != null)
+                ShuttingDown(this, EventArgs.Empty); 
+        }
+
+        #endregion
+
+        // Called when a widget is realized. (window handles and such are valid)
+        // protected override void OnRealized() { base.OnRealized(); }
+
+        // Called when the widget needs to be (fully or partially) redrawn.
+#if GTK3
+        protected override bool OnDrawn(Cairo.Context cr)
+#else
+        protected override bool OnExposeEvent(Gdk.EventExpose evnt)
+#endif
+        {
+            if (!_Initialized)
+                Initialize();
+            else
+                _GraphicsContext.MakeCurrent(_WindowInfo);
+
+#if GTK3
+            var result = base.OnDrawn(cr);
+#else
+            bool result = base.OnExposeEvent(evnt);
+#endif
+
+            OnRenderFrame();
+
+#if !GTK3
+            evnt.Window.Display.Sync(); // Add Sync call to fix resize rendering problem (Jay L. T. Cornwall) - How does this affect VSync?
+#endif
+
+            _GraphicsContext.SwapBuffers();
+
+            return result;
+        }
+
+        // Called on Resize
+        protected override bool OnConfigureEvent(Gdk.EventConfigure evnt)
+        {
+            bool result = base.OnConfigureEvent(evnt);
+
+            if (_GraphicsContext != null)
+                _GraphicsContext.Update(_WindowInfo);
+
+            return result;
+        }
+
+        void Initialize()
+        {
+            _Initialized = true;
+
+            // If this looks uninitialized...  initialize.
+            if (ColorBPP == 0)
+            {
+                ColorBPP = 32;
+
+                if (DepthBPP == 0)
+                    DepthBPP = 16;
+            }
+
+            ColorFormat colorBufferColorFormat = new ColorFormat(ColorBPP);
+
+            ColorFormat accumulationColorFormat = new ColorFormat(AccumulatorBPP);
+
+            int buffers = 2;
+            if (SingleBuffer)
+                buffers--;
+
+            GraphicsMode graphicsMode = new GraphicsMode(colorBufferColorFormat, DepthBPP, StencilBPP, Samples, accumulationColorFormat, buffers, Stereo);
+
+            if (Configuration.RunningOnWindows)
+                Console.WriteLine("OpenTK running on windows");
+            else if (Configuration.RunningOnMacOS)
+                Console.WriteLine("OpenTK running on OSX");
+            else 
+                Console.WriteLine("OpenTK running on X11");
+
+            // IWindowInfo
+            if (Configuration.RunningOnWindows)
+                _WindowInfo = InitializeWindows();
+            else if (Configuration.RunningOnMacOS)
+                _WindowInfo = InitializeOSX();
+            else
+                _WindowInfo = InitializeX(graphicsMode);
+
+            // GraphicsContext
+            _GraphicsContext = new GraphicsContext(graphicsMode, _WindowInfo, GlVersionMajor, GlVersionMinor, _GraphicsContextFlags);
+            _GraphicsContext.MakeCurrent(_WindowInfo);
+
+            if (GraphicsContext.ShareContexts)
+            {
+                Interlocked.Increment(ref _GraphicsContextCount);
+
+                if (!_SharedContextInitialized)
+                {
+                    _SharedContextInitialized = true;
+                    ((IGraphicsContextInternal)_GraphicsContext).LoadAll();
+                    OnGraphicsContextInitialized();
+                }
+            }
+            else
+            {
+                ((IGraphicsContextInternal)_GraphicsContext).LoadAll();
+                OnGraphicsContextInitialized();
+            }
+
+            OnInitialized();
+        }
+
+        #region Windows Specific initalization
+
+        IWindowInfo InitializeWindows()
+        {
+            IntPtr windowHandle = gdk_win32_drawable_get_handle(GdkWindow.Handle);
+            return Utilities.CreateWindowsWindowInfo(windowHandle);
+        }
+
+        [SuppressUnmanagedCodeSecurity, DllImport("libgdk-win32-2.0-0.dll")]
+        public static extern IntPtr gdk_win32_drawable_get_handle(IntPtr d);
+
+        #endregion
+
+        #region OSX Specific Initialization
+
+        IWindowInfo InitializeOSX()
+        {
+            IntPtr windowHandle = gdk_quartz_window_get_nswindow(this.GdkWindow.Handle);
+            IntPtr viewHandle = gdk_quartz_window_get_nsview(this.GdkWindow.Handle);
+            return Utilities.CreateMacOSWindowInfo(windowHandle, viewHandle);
+        }
+
+        [SuppressUnmanagedCodeSecurity, DllImport("libgdk-quartz-2.0.0.dylib")]
+        static extern IntPtr gdk_quartz_window_get_nswindow(IntPtr handle);
+
+        [SuppressUnmanagedCodeSecurity, DllImport("libgdk-quartz-2.0.0.dylib")]
+        static extern IntPtr gdk_quartz_window_get_nsview(IntPtr handle);
+
+        #endregion
+
+        #region X Specific Initialization
+
+#if GTK3
+        const string UnixLibGdkName = "libgdk-3.so.0";
+#else
+        const string UnixLibGdkName = "libgdk-x11-2.0.so.0";
+#endif
+        const string UnixLibX11Name = "libX11.so.6";
+        const string UnixLibGLName = "libGL.so.1";
+
+        const int GLX_NONE = 0;
+        const int GLX_USE_GL = 1;
+        const int GLX_BUFFER_SIZE = 2;
+        const int GLX_LEVEL = 3;
+        const int GLX_RGBA = 4;
+        const int GLX_DOUBLEBUFFER = 5;
+        const int GLX_STEREO = 6;
+        const int GLX_AUX_BUFFERS = 7;
+        const int GLX_RED_SIZE = 8;
+        const int GLX_GREEN_SIZE = 9;
+        const int GLX_BLUE_SIZE = 10;
+        const int GLX_ALPHA_SIZE = 11;
+        const int GLX_DEPTH_SIZE = 12;
+        const int GLX_STENCIL_SIZE = 13;
+        const int GLX_ACCUM_RED_SIZE = 14;
+        const int GLX_ACCUM_GREEN_SIZE = 15;
+        const int GLX_ACCUM_BLUE_SIZE = 16;
+        const int GLX_ACCUM_ALPHA_SIZE = 17;
+
+        public enum XVisualClass
+        {
+            StaticGray = 0,
+            GrayScale = 1,
+            StaticColor = 2,
+            PseudoColor = 3,
+            TrueColor = 4,
+            DirectColor = 5,
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        struct XVisualInfo
+        {
+            public IntPtr Visual;
+            public IntPtr VisualID;
+            public int Screen;
+            public int Depth;
+            public XVisualClass Class;
+            public long RedMask;
+            public long GreenMask;
+            public long blueMask;
+            public int ColormapSize;
+            public int BitsPerRgb;
+
+            public override string ToString()
+            {
+                return String.Format("id ({0}), screen ({1}), depth ({2}), class ({3})",
+                    VisualID, Screen, Depth, Class);
+            }
+        }
+
+        [Flags]
+        internal enum XVisualInfoMask
+        {
+            No = 0x0,
+            ID = 0x1,
+            Screen = 0x2,
+            Depth = 0x4,
+            Class = 0x8,
+            Red = 0x10,
+            Green = 0x20,
+            Blue = 0x40,
+            ColormapSize = 0x80,
+            BitsPerRGB = 0x100,
+            All = 0x1FF,
+        }
+
+        IWindowInfo InitializeX(GraphicsMode mode)
+        {
+            IntPtr display = gdk_x11_display_get_xdisplay(Display.Handle);
+            int screen = Screen.Number;
+#if GTK3
+            IntPtr windowHandle = gdk_x11_window_get_xid(GdkWindow.Handle);
+            IntPtr rootWindow = gdk_x11_window_get_xid(RootWindow.Handle);
+#else
+            IntPtr windowHandle = gdk_x11_drawable_get_xid(GdkWindow.Handle);
+            IntPtr rootWindow = gdk_x11_drawable_get_xid(RootWindow.Handle);
+#endif
+            IWindowInfo retval;
+
+            IntPtr visualInfo;
+            if (mode.Index.HasValue)
+            {
+                XVisualInfo info = new XVisualInfo();
+                info.VisualID = mode.Index.Value;
+                int dummy;
+                visualInfo = XGetVisualInfo(display, XVisualInfoMask.ID, ref info, out dummy);
+            }
+            else
+                visualInfo = GetVisualInfo(display);
+
+            retval = Utilities.CreateX11WindowInfo(display, screen, windowHandle, rootWindow, visualInfo);
+            XFree(visualInfo);
+
+            return retval;
+        }
+
+        static IntPtr XGetVisualInfo(IntPtr display, XVisualInfoMask vinfo_mask, ref XVisualInfo template, out int nitems)
+        {
+            return XGetVisualInfoInternal(display, (IntPtr)(int)vinfo_mask, ref template, out nitems);
+        }
+
+        IntPtr GetVisualInfo(IntPtr display)
+        {
+            try
+            {
+                int[] attributes = AttributeList.ToArray();
+                return glXChooseVisual(display, Screen.Number, attributes);
+            }
+            catch (DllNotFoundException e)
+            {
+                throw new DllNotFoundException("OpenGL dll not found!", e);
+            }
+            catch (EntryPointNotFoundException enf)
+            {
+                throw new EntryPointNotFoundException("Glx entry point not found!", enf);
+            }
+        }
+
+        List<int> AttributeList
+        {
+            get
+            {
+                List<int> attributeList = new List<int>(24);
+
+                attributeList.Add(GLX_RGBA);
+
+                if (!SingleBuffer)
+                    attributeList.Add(GLX_DOUBLEBUFFER);
+
+                if (Stereo)
+                    attributeList.Add(GLX_STEREO);
+
+                attributeList.Add(GLX_RED_SIZE);
+                attributeList.Add(ColorBPP / 4); // TODO support 16-bit
+
+                attributeList.Add(GLX_GREEN_SIZE);
+                attributeList.Add(ColorBPP / 4); // TODO support 16-bit
+
+                attributeList.Add(GLX_BLUE_SIZE);
+                attributeList.Add(ColorBPP / 4); // TODO support 16-bit
+
+                attributeList.Add(GLX_ALPHA_SIZE);
+                attributeList.Add(ColorBPP / 4); // TODO support 16-bit
+
+                attributeList.Add(GLX_DEPTH_SIZE);
+                attributeList.Add(DepthBPP);
+
+                attributeList.Add(GLX_STENCIL_SIZE);
+                attributeList.Add(StencilBPP);
+
+                //attributeList.Add(GLX_AUX_BUFFERS);
+                //attributeList.Add(Buffers);
+
+                attributeList.Add(GLX_ACCUM_RED_SIZE);
+                attributeList.Add(AccumulatorBPP / 4);// TODO support 16-bit
+
+                attributeList.Add(GLX_ACCUM_GREEN_SIZE);
+                attributeList.Add(AccumulatorBPP / 4);// TODO support 16-bit
+
+                attributeList.Add(GLX_ACCUM_BLUE_SIZE);
+                attributeList.Add(AccumulatorBPP / 4);// TODO support 16-bit
+
+                attributeList.Add(GLX_ACCUM_ALPHA_SIZE);
+                attributeList.Add(AccumulatorBPP / 4);// TODO support 16-bit
+
+                attributeList.Add(GLX_NONE);
+
+                return attributeList;
+            }
+        }
+
+        [DllImport(UnixLibX11Name, EntryPoint = "XGetVisualInfo")]
+        static extern IntPtr XGetVisualInfoInternal(IntPtr display, IntPtr vinfo_mask, ref XVisualInfo template, out int nitems);
+
+        [SuppressUnmanagedCodeSecurity, DllImport(UnixLibX11Name)]
+        static extern void XFree(IntPtr handle);
+
+        /// <summary> Returns the X resource (window or pixmap) belonging to a GdkDrawable. </summary>
+        /// <remarks> XID gdk_x11_drawable_get_xid(GdkDrawable *drawable); </remarks>
+        /// <param name="gdkDisplay"> The GdkDrawable. </param>
+        /// <returns> The ID of drawable's X resource. </returns>
+        [SuppressUnmanagedCodeSecurity, DllImport(UnixLibGdkName)]
+        static extern IntPtr gdk_x11_drawable_get_xid(IntPtr gdkDisplay);
+
+        /// <summary> Returns the X resource (window or pixmap) belonging to a GdkDrawable. </summary>
+        /// <remarks> XID gdk_x11_drawable_get_xid(GdkDrawable *drawable); </remarks>
+        /// <param name="gdkDisplay"> The GdkDrawable. </param>
+        /// <returns> The ID of drawable's X resource. </returns>
+        [SuppressUnmanagedCodeSecurity, DllImport(UnixLibGdkName)]
+        static extern IntPtr gdk_x11_window_get_xid(IntPtr gdkDisplay);
+
+        /// <summary> Returns the X display of a GdkDisplay. </summary>
+        /// <remarks> Display* gdk_x11_display_get_xdisplay(GdkDisplay *display); </remarks>
+        /// <param name="gdkDisplay"> The GdkDrawable. </param>
+        /// <returns> The X Display of the GdkDisplay. </returns>
+        [SuppressUnmanagedCodeSecurity, DllImport(UnixLibGdkName)]
+        static extern IntPtr gdk_x11_display_get_xdisplay(IntPtr gdkDisplay);
+
+        [SuppressUnmanagedCodeSecurity, DllImport(UnixLibGLName)]
+        static extern IntPtr glXChooseVisual(IntPtr display, int screen, int[] attr);
+
+        #endregion
+
+    }
+
+}

Source/GLWidget/OpenTK.GLWidget.csproj

@@ -0,0 +1,174 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
+  <PropertyGroup>
+    <ProjectType>Local</ProjectType>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{A625BE87-0000-0000-0000-000000000000}</ProjectGuid>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <AssemblyKeyContainerName>
+    </AssemblyKeyContainerName>
+    <AssemblyName>OpenTK.GLWidget</AssemblyName>
+    <DefaultClientScript>JScript</DefaultClientScript>
+    <DefaultHTMLPageLayout>Grid</DefaultHTMLPageLayout>
+    <DefaultTargetSchema>IE50</DefaultTargetSchema>
+    <DelaySign>false</DelaySign>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>
+    </AppDesignerFolder>
+    <RootNamespace>OpenTK.GLWidget</RootNamespace>
+    <StartArguments>
+    </StartArguments>
+    <FileUpgradeFlags>
+    </FileUpgradeFlags>
+    <OldToolsVersion>2.0</OldToolsVersion>
+    <UpgradeBackupLocation />
+    <PublishUrl>publish\</PublishUrl>
+    <Install>true</Install>
+    <InstallFrom>Disk</InstallFrom>
+    <UpdateEnabled>false</UpdateEnabled>
+    <UpdateMode>Foreground</UpdateMode>
+    <UpdateInterval>7</UpdateInterval>
+    <UpdateIntervalUnits>Days</UpdateIntervalUnits>
+    <UpdatePeriodically>false</UpdatePeriodically>
+    <UpdateRequired>false</UpdateRequired>
+    <MapFileExtensions>true</MapFileExtensions>
+    <ApplicationRevision>0</ApplicationRevision>
+    <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
+    <IsWebBootstrapper>false</IsWebBootstrapper>
+    <UseApplicationTrust>false</UseApplicationTrust>
+    <BootstrapperEnabled>true</BootstrapperEnabled>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
+    <BaseAddress>285212672</BaseAddress>
+    <ConfigurationOverrideFile>
+    </ConfigurationOverrideFile>
+    <DefineConstants>DEBUG;TRACE;</DefineConstants>
+    <DocumentationFile>..\..\Binaries\OpenTK\Debug\OpenTK.GLWidget.xml</DocumentationFile>
+    <DebugSymbols>True</DebugSymbols>
+    <FileAlignment>4096</FileAlignment>
+    <Optimize>False</Optimize>
+    <OutputPath>..\..\Binaries\OpenTK\Debug\</OutputPath>
+    <RegisterForComInterop>False</RegisterForComInterop>
+    <RemoveIntegerChecks>False</RemoveIntegerChecks>
+    <WarningLevel>4</WarningLevel>
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+    <DebugType>full</DebugType>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
+    <BaseAddress>285212672</BaseAddress>
+    <ConfigurationOverrideFile>
+    </ConfigurationOverrideFile>
+    <DefineConstants>TRACE;</DefineConstants>
+    <DocumentationFile>..\..\Binaries\OpenTK\Release\OpenTK.GLWidget.xml</DocumentationFile>
+    <FileAlignment>4096</FileAlignment>
+    <Optimize>True</Optimize>
+    <OutputPath>..\..\Binaries\OpenTK\Release\</OutputPath>
+    <RegisterForComInterop>False</RegisterForComInterop>
+    <RemoveIntegerChecks>False</RemoveIntegerChecks>
+    <WarningLevel>4</WarningLevel>
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+    <DebugType>none</DebugType>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Documentation|AnyCPU'">
+    <OutputPath>..\..\Binaries\OpenTK\Release\</OutputPath>
+    <DebugType>none</DebugType>
+    <WarningLevel>4</WarningLevel>
+    <Optimize>True</Optimize>
+    <DefineConstants>TRACE;</DefineConstants>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <DocumentationFile>..\..\Binaries\OpenTK\Release\OpenTK.GLWidget.xml</DocumentationFile>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Nsis|AnyCPU'">
+    <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
+    <BaseAddress>285212672</BaseAddress>
+    <ConfigurationOverrideFile>
+    </ConfigurationOverrideFile>
+    <DefineConstants>TRACE;</DefineConstants>
+    <DocumentationFile>..\..\Binaries\OpenTK\Release\OpenTK.GLWidget.xml</DocumentationFile>
+    <FileAlignment>4096</FileAlignment>
+    <Optimize>True</Optimize>
+    <OutputPath>..\..\Binaries\OpenTK\Release\</OutputPath>
+    <RegisterForComInterop>False</RegisterForComInterop>
+    <RemoveIntegerChecks>False</RemoveIntegerChecks>
+    <WarningLevel>4</WarningLevel>
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+    <DebugType>none</DebugType>
+  </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>True</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>..\..\OpenTK.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System">
+      <Name>System</Name>
+    </Reference>
+    <Reference Include="atk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
+    <Reference Include="gdk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
+    <Reference Include="glib-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
+    <Reference Include="glade-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
+    <Reference Include="gtk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
+    <Reference Include="pango-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\OpenTK\OpenTK.csproj">
+      <Name>OpenTK</Name>
+      <Project>{A37A7E14-0000-0000-0000-000000000000}</Project>
+      <Private>False</Private>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="..\GlobalAssemblyInfo.cs">
+      <Link>Properties\GlobalAssemblyInfo.cs</Link>
+    </Compile>
+    <Compile Include="Properties\AssemblyInfo.cs">
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Include="GLWidget.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+  <PropertyGroup>
+    <PreBuildEvent>
+    </PreBuildEvent>
+    <PostBuildEvent>
+    </PostBuildEvent>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'DebugMinimal|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>..\..\Binaries\OpenTK\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE;</DefineConstants>
+    <WarningLevel>4</WarningLevel>
+    <DocumentationFile>..\..\Binaries\OpenTK\Debug\OpenTK.GLWidget.xml</DocumentationFile>
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <RemoveIntegerChecks>False</RemoveIntegerChecks>
+    <BaseAddress>285212672</BaseAddress>
+    <ConfigurationOverrideFile>
+    </ConfigurationOverrideFile>
+    <RegisterForComInterop>False</RegisterForComInterop>
+    <FileAlignment>4096</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'ReleaseMinimal|AnyCPU' ">
+    <DebugType>none</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>..\..\Binaries\OpenTK\Release\</OutputPath>
+    <DefineConstants>TRACE;</DefineConstants>
+    <WarningLevel>4</WarningLevel>
+    <DocumentationFile>..\..\Binaries\OpenTK\Release\OpenTK.GLWidget.xml</DocumentationFile>
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <RemoveIntegerChecks>False</RemoveIntegerChecks>
+    <BaseAddress>285212672</BaseAddress>
+    <ConfigurationOverrideFile>
+    </ConfigurationOverrideFile>
+    <RegisterForComInterop>False</RegisterForComInterop>
+    <FileAlignment>4096</FileAlignment>
+  </PropertyGroup>
+</Project>

Source/GLWidget/Properties/AssemblyInfo.cs

@@ -0,0 +1,15 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("OpenTK.GLWidget")]
+[assembly: AssemblyDescription("Provides integration with Gtk 2 and 3.")]
+
+[assembly: System.CLSCompliant(true)]
+[assembly: System.Security.AllowPartiallyTrustedCallers]
+#if NET40
+[assembly: System.Security.SecurityRules(System.Security.SecurityRuleSet.Level1)]
+#endif