[dri2] Add tail pointer to reemitDrawableInfo callback.

When the DRI doesn't parse the event buffer for a while, the X server
may overwrite data that the driver didn't get a chance to look at.  The
reemitDrawableInfo callback requests that the X server reemit all info
for the specified drawable.  To make use of this, the drive needs to know
the new tail pointer so it know where to start reading from.

2 files changed, 3 insertions, 2 deletions

diff --git a/include/GL/internal/dri_interface.h b/include/GL/internal/dri_interface.h
index 175ff2d3aff..a815c28dbc9 100644
--- a/include/GL/internal/dri_interface.h
+++ b/include/GL/internal/dri_interface.h
@@ -424,8 +424,9 @@ struct __DRIcoreDRI2ExtensionRec {
      * specified drawable in the DRI2 event buffer.
      *
      * \param draw the drawable for which to request info
+     * \param tail the new event buffer tail pointer
      */
-    void (*reemitDrawableInfo)(__DRIdrawable *draw);
+    void (*reemitDrawableInfo)(__DRIdrawable *draw, unsigned int *tail);
 
 };
 
diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index 72836538830..59224c6651f 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -303,7 +303,7 @@ __driParseEvents(__DRIscreenPrivate *psp, __DRIdrawablePrivate *pdp)
 	* server overwrote it and we have to reset our tail
 	* pointer. */
 	DRM_UNLOCK(psp->fd, psp->lock, pcp->hHWContext);
-	(*psp->dri2.core->reemitDrawableInfo)(pdp->pdraw);
+	(*psp->dri2.core->reemitDrawableInfo)(pdp->pdraw, &pdp->dri2.tail);
 	DRM_LIGHT_LOCK(psp->fd, psp->lock, pcp->hHWContext);
     }