[PATCH] glx: fix regression with copy sub buffer disappearing

[Dave Airlie]

From: Fedora X Ninjas <x at fedoraproject.org>

So copy sub buffer isn't a core extensions it's a driver extension
which means we are using totally the wrong interface to query for it
here, which means bad things happen when you roll out this code,
for instance MESA_copy_sub_buffer stops working.

This is just the hack I'm sticking in Fedora to avoid the regression
for now, but hopefully will inspire us.
---
 glx/glxdriswrast.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/glx/glxdriswrast.c b/glx/glxdriswrast.c
index 9add2a1..e8e53bf 100644
--- a/glx/glxdriswrast.c
+++ b/glx/glxdriswrast.c
@@ -396,6 +396,9 @@ initializeExtensions(__GLXDRIscreen * screen)
     const __DRIextension **extensions;
     int i;
 
+    __glXEnableExtension(screen->glx_enable_bits, "GLX_MESA_copy_sub_buffer");
+    LogMessage(X_INFO, "AIGLX: enabled GLX_MESA_copy_sub_buffer\n");
+
     if (screen->swrast->base.version >= 3) {
         __glXEnableExtension(screen->glx_enable_bits,
                              "GLX_ARB_create_context");
@@ -416,8 +419,6 @@ initializeExtensions(__GLXDRIscreen * screen)
         if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0) {
             screen->copySubBuffer =
                 (const __DRIcopySubBufferExtension *) extensions[i];
-            __glXEnableExtension(screen->glx_enable_bits,
-                                 "GLX_MESA_copy_sub_buffer");
         }
 
         if (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0) {
-- 
2.5.0