Roderick Colenbrander : wined3d: Check for the presence of wglGetExtensionsStringARB.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 5d08f3b7051c5b09eedff2ca4365faccc02ce8b6
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=5d08f3b7051c5b09eedff2ca4365faccc02ce8b6

Author: Roderick Colenbrander <thunderbird2k at gmail.com>
Date:   Sun Mar 29 22:08:42 2009 +0200

wined3d: Check for the presence of wglGetExtensionsStringARB.

---

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

diff --git a/dlls/wined3d/directx.c b/dlls/wined3d/directx.c
index aee4efe..3294fff 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];