xf86-video-intel: src/sna/sna_dri2.c

[Chris Wilson]

 src/sna/sna_dri2.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

New commits:
commit 9306a148cbf1a2471540f3301136d57e93197593
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Sun Jun 8 09:40:19 2014 +0100

    sna/dri2: Use xchg for offscreen drawables where applicable
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

diff --git a/src/sna/sna_dri2.c b/src/sna/sna_dri2.c
index 314651e..622a8e6 100644
--- a/src/sna/sna_dri2.c
+++ b/src/sna/sna_dri2.c
@@ -2485,9 +2485,12 @@ sna_dri2_schedule_swap(ClientPtr client, DrawablePtr draw, DRI2BufferPtr front,
 
 blit:
 	DBG(("%s -- blit\n", __FUNCTION__));
-	__sna_dri2_copy_region(sna, draw, NULL, back, front, false);
 	if (info)
 		sna_dri2_event_free(sna, draw, info);
+	if (can_xchg(sna, draw, front, back))
+		sna_dri2_exchange_buffers(draw, front, back);
+	else
+		__sna_dri2_copy_region(sna, draw, NULL, back, front, false);
 skip:
 	DBG(("%s: unable to show frame, unblocking client\n", __FUNCTION__));
 	if (crtc == NULL)