From 6b1e354dbb6e8ed9f2c654bbe7f8bbf241843d1c Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Tue, 19 Dec 2006 15:24:19 +0100
Subject: [PATCH] EXA: Disable SHM pixmaps.

See https://bugs.freedesktop.org/show_bug.cgi?id=6772 .
---
 exa/exa.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/exa/exa.c b/exa/exa.c
index b49065303..bf9411469 100644
--- a/exa/exa.c
+++ b/exa/exa.c
@@ -32,6 +32,10 @@
 #include <dix-config.h>
 #endif
 
+#ifdef MITSHM
+#include "shmint.h"
+#endif
+
 #include <stdlib.h>
 
 #include "exa_priv.h"
@@ -610,6 +614,13 @@ exaDriverInit (ScreenPtr		pScreen,
     miDisableCompositeWrapper(pScreen);
 #endif
 
+#ifdef MITSHM
+    /* Re-register with the MI funcs, which don't allow shared pixmaps.
+     * Shared pixmaps are almost always a performance loss for us, but this
+     * still allows for SHM PutImage.
+     */
+    ShmRegisterFuncs(pScreen, NULL);
+#endif
     /*
      * Hookup offscreen pixmaps
      */