From fc9ec31ba5f53633e5a201b03e1729ecf9767aab Mon Sep 17 00:00:00 2001
From: Andrew Corrigan <andrew.corrigan@gmail.com>
Date: Mon, 2 Dec 2013 22:40:25 -0500
Subject: [PATCH] falls back to glXGetFBConfigs, when ChooseFBConfigSGIX fails
 on TurboVNC + VirtualGL

---
 src/glx_context.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/glx_context.c b/src/glx_context.c
index 47ae653f..a84de8b0 100644
--- a/src/glx_context.c
+++ b/src/glx_context.c
@@ -85,6 +85,16 @@ static GLboolean chooseFBConfig(const _GLFWfbconfig* desired, GLXFBConfig* resul
                                                      _glfw.x11.screen,
                                                      NULL,
                                                      &nativeCount);
+
+        // fallback, for when the above call fails running over TurboVNC + VirtualGL
+        if(!nativeCount)
+        {
+            nativeConfigs = glXGetFBConfigs(_glfw.x11.display,
+                                            _glfw.x11.screen,
+                                            &nativeCount);
+
+            _glfw.glx.SGIX_fbconfig = GL_FALSE;
+        }
     }
     else
     {