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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef PATHCOMPARE_H
+#define PATHCOMPARE_H
+
+#include <qmath.h>
+
+namespace QPathCompare {
+
+static const int precision = 8;
+static const qreal epsilon = qPow(0.1, precision);
+
+static inline bool fuzzyIsZero(qreal x, qreal relative)
+{
+ if (qAbs(relative) < epsilon)
+ return qAbs(x) < epsilon;
+ else
+ return qAbs(x / relative) < epsilon;
+}
+
+static bool fuzzyCompare(const QPointF &a, const QPointF &b)
+{
+ const QPointF delta = a - b;
+
+ const qreal x = qMax(qAbs(a.x()), qAbs(b.x()));
+ const qreal y = qMax(qAbs(a.y()), qAbs(b.y()));
+
+ return fuzzyIsZero(delta.x(), x) && fuzzyIsZero(delta.y(), y);
+}
+
+static bool isClosed(const QPainterPath &path)
+{
+ if (path.elementCount() == 0)
+ return false;
+
+ QPointF first = path.elementAt(0);
+ QPointF last = path.elementAt(path.elementCount() - 1);
+
+ return fuzzyCompare(first, last);
+}
+
+// rotation and direction independent path comparison
+// allows paths to be shifted or reversed relative to each other
+static bool comparePaths(const QPainterPath &actual, const QPainterPath &expected)
+{
+ const int endActual = isClosed(actual) ? actual.elementCount() - 1 : actual.elementCount();
+ const int endExpected = isClosed(expected) ? expected.elementCount() - 1 : expected.elementCount();
+
+ if (endActual != endExpected)
+ return false;
+
+ for (int i = 0; i < endActual; ++i) {
+ int k = 0;
+ for (k = 0; k < endActual; ++k) {
+ int i1 = k;
+ int i2 = (i + k) % endActual;
+
+ QPointF a = actual.elementAt(i1);
+ QPointF b = expected.elementAt(i2);
+
+ if (!fuzzyCompare(a, b))
+ break;
+ }
+
+ if (k == endActual)
+ return true;
+
+ for (k = 0; k < endActual; ++k) {
+ int i1 = k;
+ int i2 = (i + endActual - k) % endActual;
+
+ QPointF a = actual.elementAt(i1);
+ QPointF b = expected.elementAt(i2);
+
+ if (!fuzzyCompare(a, b))
+ break;
+ }
+
+ if (k == endActual)
+ return true;
+ }
+
+ return false;
+}
+
+}
+
+#endif