From e879b731454de8f286069bf0313cc028e8e7be06 Mon Sep 17 00:00:00 2001
From: Jarl Gullberg <jarl.gullberg@gmail.com>
Date: Fri, 15 Sep 2017 12:37:28 +0200
Subject: [PATCH] Add buffer flag selection.

---
 src/OpenTK.GLWidget/GLWidget.cs | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/OpenTK.GLWidget/GLWidget.cs b/src/OpenTK.GLWidget/GLWidget.cs
index f5ae5920..62e74f8d 100644
--- a/src/OpenTK.GLWidget/GLWidget.cs
+++ b/src/OpenTK.GLWidget/GLWidget.cs
@@ -1,7 +1,7 @@
 using System;
 using System.Threading;
 using System.ComponentModel;
-
+using Gdk;
 using OpenTK.Graphics;
 using OpenTK.Platform;
 
@@ -104,8 +104,24 @@ namespace OpenTK
             Samples = graphicsMode.Samples;
             Stereo = graphicsMode.Stereo;
 
-            SetRequiredVersion(glVersionMajor, glVersionMinor);
             GraphicsContextFlags = graphicsContextFlags;
+
+            SetRequiredVersion(glVersionMajor, glVersionMinor);
+
+            if (graphicsMode.Depth > 0)
+            {
+                HasDepthBuffer = true;
+            }
+
+            if (graphicsMode.Stencil > 0)
+            {
+                HasStencilBuffer = true;
+            }
+
+            if (graphicsMode.ColorFormat.Alpha > 0)
+            {
+                HasAlpha = true;
+            }
         }
 
         /// <summary>