Basic infrastructure to support fences.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4798 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/rfb/SMsgHandler.cxx b/common/rfb/SMsgHandler.cxx
index 730bc2c..ff15e19 100644
--- a/common/rfb/SMsgHandler.cxx
+++ b/common/rfb/SMsgHandler.cxx
@@ -1,5 +1,5 @@
 /* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
- * Copyright 2009 Pierre Ossman for Cendio AB
+ * Copyright 2009-2011 Pierre Ossman for Cendio AB
  * 
  * This is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -41,14 +41,26 @@
 
 void SMsgHandler::setEncodings(int nEncodings, rdr::S32* encodings)
 {
+  bool firstFence;
+
+  firstFence = !cp.supportsFence;
+
   cp.setEncodings(nEncodings, encodings);
+
   supportsLocalCursor();
+
+  if (cp.supportsFence && firstFence)
+    supportsFence();
 }
 
 void SMsgHandler::supportsLocalCursor()
 {
 }
 
+void SMsgHandler::supportsFence()
+{
+}
+
 void SMsgHandler::setDesktopSize(int fb_width, int fb_height,
                                  const ScreenSet& layout)
 {