--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/auto/qpathclipper/pathcompare.h	Tue Jul 06 15:10:48 2010 +0300
@@ -0,0 +1,126 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#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