From 5d08f3b7051c5b09eedff2ca4365faccc02ce8b6 Mon Sep 17 00:00:00 2001
From: Roderick Colenbrander <thunderbird2k@gmail.com>
Date: Sun, 29 Mar 2009 22:08:42 +0200
Subject: [PATCH] wined3d: Check for the presence of wglGetExtensionsStringARB.

---
 dlls/wined3d/directx.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/dlls/wined3d/directx.c b/dlls/wined3d/directx.c
index aee4efe0058..3294fff0d9e 100644
--- a/dlls/wined3d/directx.c
+++ b/dlls/wined3d/directx.c
@@ -1405,12 +1405,14 @@ static BOOL IWineD3DImpl_FillGLCaps(WineD3D_GL_Info *gl_info) {
     /* Make sure there's an active HDC else the WGL extensions will fail */
     hdc = pwglGetCurrentDC();
     if (hdc) {
-        WGL_Extensions = GL_EXTCALL(wglGetExtensionsStringARB(hdc));
-        TRACE_(d3d_caps)("WGL_Extensions reported:\n");
+        /* Not all GL drivers might offer WGL extensions e.g. VirtualBox */
+        if(GL_EXTCALL(wglGetExtensionsStringARB))
+            WGL_Extensions = GL_EXTCALL(wglGetExtensionsStringARB(hdc));
 
         if (NULL == WGL_Extensions) {
             ERR("   WGL_Extensions returns NULL\n");
         } else {
+            TRACE_(d3d_caps)("WGL_Extensions reported:\n");
             while (*WGL_Extensions != 0x00) {
                 const char *Start;
                 char ThisExtn[256];