From 88af339c0b9d249856a1732f48248674963f57be Mon Sep 17 00:00:00 2001
From: Emmanuel <nhv3@localhost.localdomain>
Date: Tue, 15 Sep 2020 11:35:43 +0000
Subject: [PATCH] fix context creation on macos when gtk window is a nsview

---
 GLWidget/GLWidget.cs                              | 9 ++++++++-
 GLWidget/OpenTK/Platform/MacOS/CocoaWindowInfo.cs | 6 ++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/GLWidget/GLWidget.cs b/GLWidget/GLWidget.cs
index 4dac0ef..3cc1869 100644
--- a/GLWidget/GLWidget.cs
+++ b/GLWidget/GLWidget.cs
@@ -365,7 +365,14 @@ namespace OpenTK
         IWindowInfo InitializeOSX()
         {
             IntPtr windowHandle = gdk_quartz_window_get_nswindow(this.Window.Handle);
-            //IntPtr viewHandle = gdk_quartz_window_get_nsview(this.GdkWindow.Handle);
+
+            if (windowHandle == IntPtr.Zero)
+            {
+                IntPtr viewHandle = gdk_quartz_window_get_nsview(this.Window.Handle);
+
+                return Utilities.CreateMacOSWindowInfo(windowHandle, viewHandle);
+            }
+
             return Utilities.CreateMacOSWindowInfo(windowHandle);
         }
 
diff --git a/GLWidget/OpenTK/Platform/MacOS/CocoaWindowInfo.cs b/GLWidget/OpenTK/Platform/MacOS/CocoaWindowInfo.cs
index bfef467..feb3c52 100644
--- a/GLWidget/OpenTK/Platform/MacOS/CocoaWindowInfo.cs
+++ b/GLWidget/OpenTK/Platform/MacOS/CocoaWindowInfo.cs
@@ -37,6 +37,7 @@ namespace OpenTK.Platform.MacOS
     internal sealed class CocoaWindowInfo : IWindowInfo
     {
         private static readonly IntPtr selContentView = Selector.Get("contentView");
+        private static readonly IntPtr selWindow = Selector.Get("window");
 
         private bool disposed = false;
 
@@ -57,6 +58,11 @@ namespace OpenTK.Platform.MacOS
         /// <param name="nsViewRef">A valid NSView reference.</param>
         public CocoaWindowInfo(IntPtr nsWindowRef, IntPtr nsViewRef)
         {
+            if (nsWindowRef == IntPtr.Zero)
+            {
+                nsWindowRef = Cocoa.SendIntPtr(nsViewRef, selWindow);
+            }
+
             this.Handle = nsWindowRef;
             this.ViewHandle = nsViewRef;
             Cocoa.SendVoid(nsWindowRef, Selector.Retain);