From: Xiang, Haihao <haihao.xiang@intel.com>
Date: Wed, 5 Dec 2007 02:31:35 +0000 (+0800)
Subject: Don't Swap buffer if a DRIDrawable is entirely obscured
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2407e48f2805e27e76e2e1d7083926c4077d9032;p=mesa.git

Don't Swap buffer if a DRIDrawable is entirely obscured
by another window.
---

diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index 2e2e64c4d18..2b378a531e0 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -336,6 +336,9 @@ static void driSwapBuffers(__DRIdrawable *drawable)
     __DRIdrawablePrivate *dPriv = drawable->private;
     drm_clip_rect_t rect;
 
+    if (!dPriv->numClipRects)
+        return;
+
     dPriv->swapBuffers(dPriv);
 
     /* Check that we actually have the new damage report method */