Mesa (master): DRI2: check for swapAvailable before using swap interval protocol

[Jesse Barnes]

Module: Mesa
Branch: master
Commit: 0a18cdb0ed2f4b747688f653d9947d174fae77ff
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0a18cdb0ed2f4b747688f653d9947d174fae77ff

Author: Jesse Barnes <jbarnes at virtuousgeek.org>
Date:   Mon Apr 19 14:19:48 2010 -0700

DRI2: check for swapAvailable before using swap interval protocol

This should have been part of the last change...

---

 src/glx/dri2_glx.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index d09d614..3a53ce9 100644
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -175,6 +175,8 @@ dri2CreateDrawable(__GLXscreenConfigs * psc,
 {
    __GLXDRIdrawablePrivate *pdraw;
    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
+   __GLXdisplayPrivate *dpyPriv;
+   __GLXDRIdisplayPrivate *pdp;
 
    pdraw = Xmalloc(sizeof(*pdraw));
    if (!pdraw)
@@ -189,6 +191,8 @@ dri2CreateDrawable(__GLXscreenConfigs * psc,
 
    DRI2CreateDrawable(psc->dpy, xDrawable);
 
+   dpyPriv = __glXInitialize(psc->dpy);
+   pdp = (__GLXDRIdisplayPrivate *)dpyPriv->dri2Display;;
    /* Create a new drawable */
    pdraw->base.driDrawable =
       (*psc->dri2->createNewDrawable) (psc->__driScreen,
@@ -204,7 +208,9 @@ dri2CreateDrawable(__GLXscreenConfigs * psc,
     * Make sure server has the same swap interval we do for the new
     * drawable.
     */
-   DRI2SwapInterval(psc->dpy, xDrawable, pdraw->swap_interval);
+   if (pdp->swapAvailable)
+      DRI2SwapInterval(psc->dpy, xDrawable, pdraw->swap_interval);
+
    return &pdraw->base;
 }