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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

2 files changed, 366 insertions, 0 deletions

diff --git a/tests/auto/qgraphicstransform/qgraphicstransform.pro b/tests/auto/qgraphicstransform/qgraphicstransform.pro
new file mode 100644
index 0000000000..67c939ed8b
--- /dev/null
+++ b/tests/auto/qgraphicstransform/qgraphicstransform.pro
@@ -0,0 +1,3 @@
+load(qttest_p4)
+SOURCES  += tst_qgraphicstransform.cpp
+CONFIG += parallel_test
diff --git a/tests/auto/qgraphicstransform/tst_qgraphicstransform.cpp b/tests/auto/qgraphicstransform/tst_qgraphicstransform.cpp
new file mode 100644
index 0000000000..903d7e796c
--- /dev/null
+++ b/tests/auto/qgraphicstransform/tst_qgraphicstransform.cpp
@@ -0,0 +1,363 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtTest/QtTest>
+#include <qgraphicsitem.h>
+#include <qgraphicstransform.h>
+#include "../../shared/util.h"
+
+class tst_QGraphicsTransform : public QObject {
+    Q_OBJECT
+
+public slots:
+    void initTestCase();
+    void cleanupTestCase();
+    void init();
+    void cleanup();
+
+private slots:
+    void scale();
+    void rotation();
+    void rotation3d_data();
+    void rotation3d();
+    void rotation3dArbitraryAxis_data();
+    void rotation3dArbitraryAxis();
+};
+
+
+// This will be called before the first test function is executed.
+// It is only called once.
+void tst_QGraphicsTransform::initTestCase()
+{
+}
+
+// This will be called after the last test function is executed.
+// It is only called once.
+void tst_QGraphicsTransform::cleanupTestCase()
+{
+}
+
+// This will be called before each test function is executed.
+void tst_QGraphicsTransform::init()
+{
+}
+
+// This will be called after every test function.
+void tst_QGraphicsTransform::cleanup()
+{
+}
+
+static QTransform transform2D(const QGraphicsTransform& t)
+{
+    QMatrix4x4 m;
+    t.applyTo(&m);
+    return m.toTransform();
+}
+
+void tst_QGraphicsTransform::scale()
+{
+    QGraphicsScale scale;
+
+    // check initial conditions
+    QCOMPARE(scale.xScale(), qreal(1));
+    QCOMPARE(scale.yScale(), qreal(1));
+    QCOMPARE(scale.zScale(), qreal(1));
+    QCOMPARE(scale.origin(), QVector3D(0, 0, 0));
+
+    scale.setOrigin(QVector3D(10, 10, 0));
+
+    QCOMPARE(scale.xScale(), qreal(1));
+    QCOMPARE(scale.yScale(), qreal(1));
+    QCOMPARE(scale.zScale(), qreal(1));
+    QCOMPARE(scale.origin(), QVector3D(10, 10, 0));
+
+    QMatrix4x4 t;
+    scale.applyTo(&t);
+
+    QCOMPARE(t, QMatrix4x4());
+    QCOMPARE(transform2D(scale), QTransform());
+
+    scale.setXScale(10);
+    scale.setOrigin(QVector3D(0, 0, 0));
+
+    QCOMPARE(scale.xScale(), qreal(10));
+    QCOMPARE(scale.yScale(), qreal(1));
+    QCOMPARE(scale.zScale(), qreal(1));
+    QCOMPARE(scale.origin(), QVector3D(0, 0, 0));
+
+    QTransform res;
+    res.scale(10, 1);
+
+    QCOMPARE(transform2D(scale), res);
+    QCOMPARE(transform2D(scale).map(QPointF(10, 10)), QPointF(100, 10));
+
+    scale.setOrigin(QVector3D(10, 10, 0));
+    QCOMPARE(transform2D(scale).map(QPointF(10, 10)), QPointF(10, 10));
+    QCOMPARE(transform2D(scale).map(QPointF(11, 10)), QPointF(20, 10));
+
+    scale.setYScale(2);
+    scale.setZScale(4.5);
+    scale.setOrigin(QVector3D(1, 2, 3));
+
+    QCOMPARE(scale.xScale(), qreal(10));
+    QCOMPARE(scale.yScale(), qreal(2));
+    QCOMPARE(scale.zScale(), qreal(4.5));
+    QCOMPARE(scale.origin(), QVector3D(1, 2, 3));
+
+    QMatrix4x4 t2;
+    scale.applyTo(&t2);
+
+    QCOMPARE(t2.map(QVector3D(4, 5, 6)), QVector3D(31, 8, 16.5));
+
+    // Because the origin has a non-zero z, mapping (4, 5) in 2D
+    // will introduce a projective component into the result.
+    QTransform t3 = t2.toTransform();
+    QCOMPARE(t3.map(QPointF(4, 5)), QPointF(31 / t3.m33(), 8 / t3.m33()));
+}
+
+// QMatrix4x4 uses float internally, whereas QTransform uses qreal.
+// This can lead to issues with qFuzzyCompare() where it uses double
+// precision to compare values that have no more than float precision
+// after conversion from QMatrix4x4 to QTransform.  The following
+// definitions correct for the difference.
+static inline bool fuzzyCompare(qreal p1, qreal p2)
+{
+    // increase delta on small machines using float instead of double
+    if (sizeof(qreal) == sizeof(float))
+        return (qAbs(p1 - p2) <= 0.00003f * qMin(qAbs(p1), qAbs(p2)));
+    else
+        return (qAbs(p1 - p2) <= 0.00001f * qMin(qAbs(p1), qAbs(p2)));
+}
+
+static bool fuzzyCompare(const QTransform& t1, const QTransform& t2)
+{
+    return fuzzyCompare(t1.m11(), t2.m11()) &&
+           fuzzyCompare(t1.m12(), t2.m12()) &&
+           fuzzyCompare(t1.m13(), t2.m13()) &&
+           fuzzyCompare(t1.m21(), t2.m21()) &&
+           fuzzyCompare(t1.m22(), t2.m22()) &&
+           fuzzyCompare(t1.m23(), t2.m23()) &&
+           fuzzyCompare(t1.m31(), t2.m31()) &&
+           fuzzyCompare(t1.m32(), t2.m32()) &&
+           fuzzyCompare(t1.m33(), t2.m33());
+}
+
+static inline bool fuzzyCompare(const QMatrix4x4& m1, const QMatrix4x4& m2)
+{
+    bool ok = true;
+    for (int y = 0; y < 4; ++y)
+        for (int x = 0; x < 4; ++x)
+            ok &= fuzzyCompare(m1(y, x), m2(y, x));
+    return ok;
+}
+
+void tst_QGraphicsTransform::rotation()
+{
+    QGraphicsRotation rotation;
+    QCOMPARE(rotation.axis(), QVector3D(0, 0, 1));
+    QCOMPARE(rotation.origin(), QVector3D(0, 0, 0));
+    QCOMPARE(rotation.angle(), (qreal)0);
+
+    rotation.setOrigin(QVector3D(10, 10, 0));
+
+    QCOMPARE(rotation.axis(), QVector3D(0, 0, 1));
+    QCOMPARE(rotation.origin(), QVector3D(10, 10, 0));
+    QCOMPARE(rotation.angle(), (qreal)0);
+
+    QMatrix4x4 t;
+    rotation.applyTo(&t);
+
+    QCOMPARE(t, QMatrix4x4());
+    QCOMPARE(transform2D(rotation), QTransform());
+
+    rotation.setAngle(40);
+    rotation.setOrigin(QVector3D(0, 0, 0));
+
+    QCOMPARE(rotation.axis(), QVector3D(0, 0, 1));
+    QCOMPARE(rotation.origin(), QVector3D(0, 0, 0));
+    QCOMPARE(rotation.angle(), (qreal)40);
+
+    QTransform res;
+    res.rotate(40);
+
+    QVERIFY(fuzzyCompare(transform2D(rotation), res));
+
+    rotation.setOrigin(QVector3D(10, 10, 0));
+    rotation.setAngle(90);
+    QCOMPARE(transform2D(rotation).map(QPointF(10, 10)), QPointF(10, 10));
+    QCOMPARE(transform2D(rotation).map(QPointF(20, 10)), QPointF(10, 20));
+
+    rotation.setOrigin(QVector3D(0, 0, 0));
+    rotation.setAngle(qQNaN());
+    QCOMPARE(transform2D(rotation).map(QPointF(20, 10)), QPointF(20, 10));
+}
+
+Q_DECLARE_METATYPE(Qt::Axis);
+void tst_QGraphicsTransform::rotation3d_data()
+{
+    QTest::addColumn<Qt::Axis>("axis");
+    QTest::addColumn<qreal>("angle");
+
+    for (int angle = 0; angle <= 360; angle++) {
+        QTest::newRow("test rotation on X") << Qt::XAxis << qreal(angle);
+        QTest::newRow("test rotation on Y") << Qt::YAxis << qreal(angle);
+        QTest::newRow("test rotation on Z") << Qt::ZAxis << qreal(angle);
+    }
+}
+
+void tst_QGraphicsTransform::rotation3d()
+{
+    QFETCH(Qt::Axis, axis);
+    QFETCH(qreal, angle);
+
+    QGraphicsRotation rotation;
+    rotation.setAxis(axis);
+
+    QMatrix4x4 t;
+    rotation.applyTo(&t);
+
+    QVERIFY(t.isIdentity());
+    QVERIFY(transform2D(rotation).isIdentity());
+
+    rotation.setAngle(angle);
+
+    // QGraphicsRotation uses a correct mathematical rotation in 3D.
+    // QTransform's Qt::YAxis rotation is inverted from the mathematical
+    // version of rotation.  We correct for that here.
+    QTransform expected;
+    if (axis == Qt::YAxis && angle != 180.)
+        expected.rotate(-angle, axis);
+    else
+        expected.rotate(angle, axis);
+
+    QVERIFY(fuzzyCompare(transform2D(rotation), expected));
+
+    // Check that "rotation" produces the 4x4 form of the 3x3 matrix.
+    // i.e. third row and column are 0 0 1 0.
+    t.setToIdentity();
+    rotation.applyTo(&t);
+    QMatrix4x4 r(expected);
+    if (sizeof(qreal) == sizeof(float) && angle == 268) {
+        // This test fails, on only this angle, when qreal == float
+        // because the deg2rad value in QTransform is not accurate
+        // enough to match what QMatrix4x4 is doing.
+    } else {
+        QVERIFY(fuzzyCompare(t, r));
+    }
+
+    //now let's check that a null vector will not change the transform
+    rotation.setAxis(QVector3D(0, 0, 0));
+    rotation.setOrigin(QVector3D(10, 10, 0));
+
+    t.setToIdentity();
+    rotation.applyTo(&t);
+
+    QVERIFY(t.isIdentity());
+    QVERIFY(transform2D(rotation).isIdentity());
+
+    rotation.setAngle(angle);
+
+    QVERIFY(t.isIdentity());
+    QVERIFY(transform2D(rotation).isIdentity());
+
+    rotation.setOrigin(QVector3D(0, 0, 0));
+
+    QVERIFY(t.isIdentity());
+    QVERIFY(transform2D(rotation).isIdentity());
+}
+
+void tst_QGraphicsTransform::rotation3dArbitraryAxis_data()
+{
+    QTest::addColumn<QVector3D>("axis");
+    QTest::addColumn<qreal>("angle");
+
+    QVector3D axis1 = QVector3D(1.0f, 1.0f, 1.0f);
+    QVector3D axis2 = QVector3D(2.0f, -3.0f, 0.5f);
+    QVector3D axis3 = QVector3D(-2.0f, 0.0f, -0.5f);
+    QVector3D axis4 = QVector3D(0.0001f, 0.0001f, 0.0001f);
+    QVector3D axis5 = QVector3D(0.01f, 0.01f, 0.01f);
+
+    for (int angle = 0; angle <= 360; angle++) {
+        QTest::newRow("test rotation on (1, 1, 1)") << axis1 << qreal(angle);
+        QTest::newRow("test rotation on (2, -3, .5)") << axis2 << qreal(angle);
+        QTest::newRow("test rotation on (-2, 0, -.5)") << axis3 << qreal(angle);
+        QTest::newRow("test rotation on (.0001, .0001, .0001)") << axis4 << qreal(angle);
+        QTest::newRow("test rotation on (.01, .01, .01)") << axis5 << qreal(angle);
+    }
+}
+
+void tst_QGraphicsTransform::rotation3dArbitraryAxis()
+{
+    QFETCH(QVector3D, axis);
+    QFETCH(qreal, angle);
+
+    QGraphicsRotation rotation;
+    rotation.setAxis(axis);
+
+    QMatrix4x4 t;
+    rotation.applyTo(&t);
+
+    QVERIFY(t.isIdentity());
+    QVERIFY(transform2D(rotation).isIdentity());
+
+    rotation.setAngle(angle);
+
+    // Compute the expected answer using QMatrix4x4 and a projection.
+    // These two steps are performed in one hit by QGraphicsRotation.
+    QMatrix4x4 exp;
+    exp.rotate(angle, axis);
+    QTransform expected = exp.toTransform(1024.0f);
+
+    QVERIFY(fuzzyCompare(transform2D(rotation), expected));
+
+    // Check that "rotation" produces the 4x4 form of the 3x3 matrix.
+    // i.e. third row and column are 0 0 1 0.
+    t.setToIdentity();
+    rotation.applyTo(&t);
+    QMatrix4x4 r(expected);
+    QVERIFY(qFuzzyCompare(t, r));
+}
+
+
+QTEST_MAIN(tst_QGraphicsTransform)
+#include "tst_qgraphicstransform.moc"
+