display : Add wormholeRegion Calculation

For copybit cases we should clear wormhole region
rather than nonwormhole. Adding support to calculate
and clear the same.

Change-Id: Ie85d1b484174199e35f43ce95b30de1fac9c30b2
diff --git a/libqdutils/cb_utils.h b/libqdutils/cb_utils.h
new file mode 100644
index 0000000..85dd78f
--- /dev/null
+++ b/libqdutils/cb_utils.h
@@ -0,0 +1,45 @@
+/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
+* Redistribution and use in source and binary forms, with or without
+* * modification, are permitted provided that the following conditions are
+* met:
+*   * Redistributions of source code must retain the above copyrigh
+*     notice, this list of conditions and the following disclaimer
+*   * Redistributions in binary form must reproduce the above
+*     copyright notice, this list of conditions and the following
+*     disclaimer in the documentation and/or other materials provided
+*     with the distribution.
+*   * Neither the name of The Linux Foundation nor the names of its
+*     contributors may be used to endorse or promote products derived
+*     from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+* * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#ifndef CB_UTIL_H
+#define CB_UTIL_H
+
+#include <ui/Region.h>
+#include "hwc_utils.h"
+
+using namespace qhwc;
+namespace qdutils {
+class CBUtils {
+public:
+static int getuiClearRegion(hwc_display_contents_1_t* list,
+                              hwc_rect_t &clearWormholeRec,
+                                      LayerProp *layerProp);
+};
+}//namespace qdutils
+#endif /* end of include guard: CB_UTIL_H*/
+