[PATCH xserver 05/12] glxproxy: Fix __glXActiveScreens allocation

[Adam Jackson]

Apparently this has been broken for about ten years, eesh. We were never
allocating any storage for this array, so the first attempt at using GLX
with Xdmx would crash the server.

Promote it to an array and use __glXNumActiveScreens to detect whether
GLX is actually enabled.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=34851
Signed-off-by: Adam Jackson <ajax at redhat.com>
---
 hw/dmx/glxProxy/glxscreens.c | 2 +-
 hw/dmx/glxProxy/glxserver.h  | 2 +-
 hw/dmx/glxProxy/glxvisuals.c | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/hw/dmx/glxProxy/glxscreens.c b/hw/dmx/glxProxy/glxscreens.c
index 508e67ed4..8c5f08beb 100644
--- a/hw/dmx/glxProxy/glxscreens.c
+++ b/hw/dmx/glxProxy/glxscreens.c
@@ -45,7 +45,7 @@
 #include "panoramiXsrv.h"
 #endif
 
-__GLXscreenInfo *__glXActiveScreens;
+__GLXscreenInfo __glXActiveScreens[MAXSCREENS];
 GLint __glXNumActiveScreens;
 
 __GLXFBConfig **__glXFBConfigs;
diff --git a/hw/dmx/glxProxy/glxserver.h b/hw/dmx/glxProxy/glxserver.h
index 7aa5ad2f2..f708f86ee 100644
--- a/hw/dmx/glxProxy/glxserver.h
+++ b/hw/dmx/glxProxy/glxserver.h
@@ -73,7 +73,7 @@ typedef struct __GLXcontextRec *GLXContext;
 */
 typedef struct __GLXclientStateRec __GLXclientState;
 
-extern __GLXscreenInfo *__glXActiveScreens;
+extern __GLXscreenInfo __glXActiveScreens[MAXSCREENS];
 extern GLint __glXNumActiveScreens;
 
 /************************************************************************/
diff --git a/hw/dmx/glxProxy/glxvisuals.c b/hw/dmx/glxProxy/glxvisuals.c
index 3fca04f0d..9bde29afd 100644
--- a/hw/dmx/glxProxy/glxvisuals.c
+++ b/hw/dmx/glxProxy/glxvisuals.c
@@ -105,7 +105,7 @@ glxMatchVisualInConfigList(ScreenPtr pScreen, VisualPtr pVisual,
     int i;
 
     /* check that the glx extension has been initialized */
-    if (!__glXActiveScreens)
+    if (!__glXNumActiveScreens)
         return 0;
 
     pGlxScreen = &__glXActiveScreens[pScreen->myNum];
@@ -135,7 +135,7 @@ glxMatchVisual(ScreenPtr pScreen, VisualPtr pVisual, ScreenPtr pMatchScreen)
     VisualID vid;
 
     /* check that the glx extension has been initialized */
-    if (!__glXActiveScreens)
+    if (!__glXNumActiveScreens)
         return NULL;
 
     pGlxScreen2 = &__glXActiveScreens[pMatchScreen->myNum];
-- 
2.13.0