From: Pierre Ossman <ossman@cendio.se>
Date: Tue, 21 Dec 2010 16:02:39 +0000 (+0000)
Subject: We might sometimes end up with an empty copy because of clipping. Make sure
X-Git-Tag: v1.0.90~89
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=201983a623a7af39aa69371d7a147788fb1d8bf2;p=tigervnc.git

We might sometimes end up with an empty copy because of clipping. Make sure
we don't waste more CPU cycles on these.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4229 3789f03b-4d11-0410-bbf8-ca57d06f2519
---

diff --git a/unix/xserver/hw/vnc/vncHooks.cc b/unix/xserver/hw/vnc/vncHooks.cc
index 2f7b4a23..52ef42ae 100644
--- a/unix/xserver/hw/vnc/vncHooks.cc
+++ b/unix/xserver/hw/vnc/vncHooks.cc
@@ -410,7 +410,8 @@ static void vncHooksCopyWindow(WindowPtr pWin, DDXPointRec ptOldOrg,
 
   (*pScreen->CopyWindow) (pWin, ptOldOrg, pOldRegion);
 
-  vncHooksScreen->desktop->add_copied(copied.reg, dx, dy);
+  if (REGION_NOTEMPTY(pScreen, copied.reg))
+    vncHooksScreen->desktop->add_copied(copied.reg, dx, dy);
 
   SCREEN_REWRAP(CopyWindow);
 }