From 5dfa3e4de2688fc61ad08bd4dfe67c96b2cca3e9 Mon Sep 17 00:00:00 2001
From: the_fiddler <the_fiddler@ebc5dd9b-fb1d-0410-b6f8-d24c324e9604>
Date: Sun, 22 Feb 2009 15:50:08 +0000
Subject: [PATCH] Check whether EXT_framebuffer_object is supported and abort
 if it is not.

---
 Source/Examples/OpenGL/FrameBufferObject.cs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Source/Examples/OpenGL/FrameBufferObject.cs b/Source/Examples/OpenGL/FrameBufferObject.cs
index 19ddefbc..b2e1751d 100644
--- a/Source/Examples/OpenGL/FrameBufferObject.cs
+++ b/Source/Examples/OpenGL/FrameBufferObject.cs
@@ -18,7 +18,7 @@ using OpenTK.Graphics.OpenGL;
 
 namespace Examples.Tutorial
 {
-    [Example("Simple FrameBuffer Object.", ExampleCategory.OpenGL)]
+    [Example("Framebuffer Objects.", ExampleCategory.OpenGL)]
     public class SimpleFBO : GameWindow
     {
         public SimpleFBO()
@@ -56,6 +56,15 @@ namespace Examples.Tutorial
 
         public override void OnLoad(EventArgs e)
         {
+            if (!GL.SupportsExtension("EXT_framebuffer_object"))
+            {
+                System.Windows.Forms.MessageBox.Show(
+                     "Your video card does not support Framebuffer Objects. Please update your drivers.",
+                     "FBOs not supported",
+                     System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Exclamation);
+                Exit();
+            }
+            
             GL.Enable(EnableCap.DepthTest);
             GL.ClearDepth(1.0f);
             GL.DepthFunc(DepthFunction.Lequal);