sde: Define rect utility functions.
Define rect helper functions used by SDE.
Change-Id: Ib8e0bc9493a40fa59a3cf90a115352edd4264a92
diff --git a/displayengine/libs/utils/rect.cpp b/displayengine/libs/utils/rect.cpp
new file mode 100644
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+++ b/displayengine/libs/utils/rect.cpp
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+/*
+* Copyright (c) 2015, 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 copyright
+* 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.
+*/
+
+#include <utils/rect.h>
+
+namespace sde {
+
+bool IsValidRect(const LayerRect &rect) {
+ return ((rect.bottom > rect.top) && (rect.right > rect.left));
+}
+
+
+LayerRect GetIntersection(const LayerRect &rect1, const LayerRect &rect2) {
+ LayerRect res;
+
+ if (!IsValidRect(rect1) || !IsValidRect(rect2)) {
+ return LayerRect();
+ }
+
+ res.left = MAX(rect1.left, rect2.left);
+ res.top = MAX(rect1.top, rect2.top);
+ res.right = MIN(rect1.right, rect2.right);
+ res.bottom = MIN(rect1.bottom, rect2.bottom);
+
+ if (!IsValidRect(res)) {
+ return LayerRect();
+ }
+
+ return res;
+}
+
+} // namespace sde
+