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#include <QtTest/QtTest>

#include <QtGui/qmatrix4x4.h>

class tst_QMatrix4x4 : public QObject

{

    Q_OBJECT

public:

    tst_QMatrix4x4() {}

    ~tst_QMatrix4x4() {}

private slots:

    void multiply_data();

    void multiply();

    void multiplyInPlace_data();

    void multiplyInPlace();

    void multiplyDirect_data();

    void multiplyDirect();

    void mapVector3D_data();

    void mapVector3D();

    void mapVector2D_data();

    void mapVector2D();

    void mapVectorDirect_data();

    void mapVectorDirect();

    void compareTranslate_data();

    void compareTranslate();

    void compareTranslateAfterScale_data();

    void compareTranslateAfterScale();

    void compareTranslateAfterRotate_data();

    void compareTranslateAfterRotate();

    void compareScale_data();

    void compareScale();

    void compareScaleAfterTranslate_data();

    void compareScaleAfterTranslate();

    void compareScaleAfterRotate_data();

    void compareScaleAfterRotate();

    void compareRotate_data();

    void compareRotate();

    void compareRotateAfterTranslate_data();

    void compareRotateAfterTranslate();

    void compareRotateAfterScale_data();

    void compareRotateAfterScale();

};

static qreal const generalValues[16] =

    {1.0f, 2.0f, 3.0f, 4.0f,

     5.0f, 6.0f, 7.0f, 8.0f,

     9.0f, 10.0f, 11.0f, 12.0f,

     13.0f, 14.0f, 15.0f, 16.0f};

void tst_QMatrix4x4::multiply_data()

{

    QTest::addColumn<QMatrix4x4>("m1");

    QTest::addColumn<QMatrix4x4>("m2");

    QTest::newRow("identity * identity")

        << QMatrix4x4() << QMatrix4x4();

    QTest::newRow("identity * general")

        << QMatrix4x4() << QMatrix4x4(generalValues);

    QTest::newRow("general * identity")

        << QMatrix4x4(generalValues) << QMatrix4x4();

    QTest::newRow("general * general")

        << QMatrix4x4(generalValues) << QMatrix4x4(generalValues);

}

QMatrix4x4 mresult;

void tst_QMatrix4x4::multiply()

{

    QFETCH(QMatrix4x4, m1);

    QFETCH(QMatrix4x4, m2);

    QMatrix4x4 m3;

    QBENCHMARK {

        m3 = m1 * m2;

    }

    // Force the result to be stored so the compiler doesn't

    // optimize away the contents of the benchmark loop.

    mresult = m3;

}

void tst_QMatrix4x4::multiplyInPlace_data()

{

    multiply_data();

}

void tst_QMatrix4x4::multiplyInPlace()

{

    QFETCH(QMatrix4x4, m1);

    QFETCH(QMatrix4x4, m2);

    QMatrix4x4 m3;

    QBENCHMARK {

        m3 = m1;

        m3 *= m2;

    }

    // Force the result to be stored so the compiler doesn't

    // optimize away the contents of the benchmark loop.

    mresult = m3;

}

// Use a direct naive multiplication algorithm.  This is used

// to compare against the optimized routines to see if they are

// actually faster than the naive implementation.

void tst_QMatrix4x4::multiplyDirect_data()

{

    multiply_data();

}

void tst_QMatrix4x4::multiplyDirect()

{

    QFETCH(QMatrix4x4, m1);

    QFETCH(QMatrix4x4, m2);

    QMatrix4x4 m3;

    const qreal *m1data = m1.constData();

    const qreal *m2data = m2.constData();

    qreal *m3data = m3.data();

    QBENCHMARK {

        for (int row = 0; row < 4; ++row) {

            for (int col = 0; col < 4; ++col) {

                m3data[col * 4 + row] = 0.0f;

                for (int j = 0; j < 4; ++j) {

                    m3data[col * 4 + row] +=

                        m1data[j * 4 + row] * m2data[col * 4 + j];

                }

            }

        }

    }

}

QVector3D vresult;

void tst_QMatrix4x4::mapVector3D_data()

{

    QTest::addColumn<QMatrix4x4>("m1");

    QTest::newRow("identity") << QMatrix4x4();

    QTest::newRow("general") << QMatrix4x4(generalValues);

    QMatrix4x4 t1;

    t1.translate(-100.5f, 64.0f, 75.25f);

    QTest::newRow("translate3D") << t1;

    QMatrix4x4 t2;

    t2.translate(-100.5f, 64.0f);

    QTest::newRow("translate2D") << t2;

    QMatrix4x4 s1;

    s1.scale(-100.5f, 64.0f, 75.25f);

    QTest::newRow("scale3D") << s1;

    QMatrix4x4 s2;

    s2.scale(-100.5f, 64.0f);

    QTest::newRow("scale2D") << s2;

}

void tst_QMatrix4x4::mapVector3D()

{

    QFETCH(QMatrix4x4, m1);

    QVector3D v(10.5f, -2.0f, 3.0f);

    QVector3D result;

    m1.optimize();

    QBENCHMARK {

        result = m1 * v;

    }

    // Force the result to be stored so the compiler doesn't

    // optimize away the contents of the benchmark loop.

    vresult = result;

}

QPointF vresult2;

void tst_QMatrix4x4::mapVector2D_data()

{

    mapVector3D_data();

}

void tst_QMatrix4x4::mapVector2D()

{

    QFETCH(QMatrix4x4, m1);

    QPointF v(10.5f, -2.0f);

    QPointF result;

    m1.optimize();

    QBENCHMARK {

        result = m1 * v;

    }

    // Force the result to be stored so the compiler doesn't

    // optimize away the contents of the benchmark loop.

    vresult2 = result;

}

// Use a direct naive multiplication algorithm.  This is used

// to compare against the optimized routines to see if they are

// actually faster than the naive implementation.

void tst_QMatrix4x4::mapVectorDirect_data()

{

    mapVector3D_data();

}

void tst_QMatrix4x4::mapVectorDirect()

{

    QFETCH(QMatrix4x4, m1);

    const qreal *m1data = m1.constData();

    qreal v[4] = {10.5f, -2.0f, 3.0f, 1.0f};

    qreal result[4];

    QBENCHMARK {

        for (int row = 0; row < 4; ++row) {

            result[row] = 0.0f;

            for (int col = 0; col < 4; ++col) {

                result[row] += m1data[col * 4 + row] * v[col];

            }

        }

        result[0] /= result[3];

        result[1] /= result[3];

        result[2] /= result[3];

    }

}

// Compare the performance of QTransform::translate() to

// QMatrix4x4::translate().

void tst_QMatrix4x4::compareTranslate_data()

{

    QTest::addColumn<bool>("useQTransform");

    QTest::addColumn<QVector3D>("translation");

    QTest::newRow("QTransform::translate(0, 0, 0)")

        << true << QVector3D(0, 0, 0);

    QTest::newRow("QMatrix4x4::translate(0, 0, 0)")

        << false << QVector3D(0, 0, 0);

    QTest::newRow("QTransform::translate(1, 2, 0)")

        << true << QVector3D(1, 2, 0);

    QTest::newRow("QMatrix4x4::translate(1, 2, 0)")

        << false << QVector3D(1, 2, 0);

    QTest::newRow("QTransform::translate(1, 2, 4)")

        << true << QVector3D(1, 2, 4);

    QTest::newRow("QMatrix4x4::translate(1, 2, 4)")

        << false << QVector3D(1, 2, 4);

}

void tst_QMatrix4x4::compareTranslate()

{

    QFETCH(bool, useQTransform);

    QFETCH(QVector3D, translation);

    qreal x = translation.x();

    qreal y = translation.y();

    qreal z = translation.z();

    if (useQTransform) {

        QTransform t;

        QBENCHMARK {

            t.translate(x, y);

        }

    } else if (z == 0.0f) {

        QMatrix4x4 m;

        QBENCHMARK {

            m.translate(x, y);

        }

    } else {

        QMatrix4x4 m;

        QBENCHMARK {

            m.translate(x, y, z);

        }

    }

}

// Compare the performance of QTransform::translate() to

// QMatrix4x4::translate() after priming the matrix with a scale().

void tst_QMatrix4x4::compareTranslateAfterScale_data()

{

    compareTranslate_data();

}

void tst_QMatrix4x4::compareTranslateAfterScale()

{

    QFETCH(bool, useQTransform);

    QFETCH(QVector3D, translation);

    qreal x = translation.x();

    qreal y = translation.y();

    qreal z = translation.z();

    if (useQTransform) {

        QTransform t;

        t.scale(3, 4);

        QBENCHMARK {

            t.translate(x, y);

        }

    } else if (z == 0.0f) {

        QMatrix4x4 m;

        m.scale(3, 4);

        QBENCHMARK {

            m.translate(x, y);

        }

    } else {

        QMatrix4x4 m;

        m.scale(3, 4, 5);

        QBENCHMARK {

            m.translate(x, y, z);

        }

    }

}

// Compare the performance of QTransform::translate() to

// QMatrix4x4::translate() after priming the matrix with a rotate().

void tst_QMatrix4x4::compareTranslateAfterRotate_data()

{

    compareTranslate_data();

}

void tst_QMatrix4x4::compareTranslateAfterRotate()

{

    QFETCH(bool, useQTransform);

    QFETCH(QVector3D, translation);

    qreal x = translation.x();

    qreal y = translation.y();

    qreal z = translation.z();

    if (useQTransform) {

        QTransform t;

        t.rotate(45.0f);

        QBENCHMARK {

            t.translate(x, y);

        }

    } else if (z == 0.0f) {

        QMatrix4x4 m;

        m.rotate(45.0f, 0, 0, 1);

        QBENCHMARK {

            m.translate(x, y);

        }

    } else {

        QMatrix4x4 m;

        m.rotate(45.0f, 0, 0, 1);

        QBENCHMARK {

            m.translate(x, y, z);

        }

    }

}

// Compare the performance of QTransform::scale() to

// QMatrix4x4::scale().

void tst_QMatrix4x4::compareScale_data()

{

    QTest::addColumn<bool>("useQTransform");

    QTest::addColumn<QVector3D>("scale");

    QTest::newRow("QTransform::scale(1, 1, 1)")

        << true << QVector3D(1, 1, 1);

    QTest::newRow("QMatrix4x4::scale(1, 1, 1)")

        << false << QVector3D(1, 1, 1);

    QTest::newRow("QTransform::scale(3, 6, 1)")

        << true << QVector3D(3, 6, 1);

    QTest::newRow("QMatrix4x4::scale(3, 6, 1)")

        << false << QVector3D(3, 6, 1);

    QTest::newRow("QTransform::scale(3, 6, 4)")

        << true << QVector3D(3, 6, 4);

    QTest::newRow("QMatrix4x4::scale(3, 6, 4)")

        << false << QVector3D(3, 6, 4);

}

void tst_QMatrix4x4::compareScale()

{

    QFETCH(bool, useQTransform);

    QFETCH(QVector3D, scale);

    qreal x = scale.x();

    qreal y = scale.y();

    qreal z = scale.z();

    if (useQTransform) {

        QTransform t;

        QBENCHMARK {

            t.scale(x, y);

        }

    } else if (z == 1.0f) {

        QMatrix4x4 m;

        QBENCHMARK {

            m.scale(x, y);

        }

    } else {

        QMatrix4x4 m;

        QBENCHMARK {

            m.scale(x, y, z);

        }

    }

}

// Compare the performance of QTransform::scale() to

// QMatrix4x4::scale() after priming the matrix with a translate().

void tst_QMatrix4x4::compareScaleAfterTranslate_data()

{

    compareScale_data();

}

void tst_QMatrix4x4::compareScaleAfterTranslate()

{

    QFETCH(bool, useQTransform);

    QFETCH(QVector3D, scale);

    qreal x = scale.x();

    qreal y = scale.y();

    qreal z = scale.z();

    if (useQTransform) {

        QTransform t;

        t.translate(20, 34);

        QBENCHMARK {

            t.scale(x, y);

        }

    } else if (z == 1.0f) {

        QMatrix4x4 m;

        m.translate(20, 34);

        QBENCHMARK {

            m.scale(x, y);

        }

    } else {

        QMatrix4x4 m;

        m.translate(20, 34, 42);

        QBENCHMARK {

            m.scale(x, y, z);

        }

    }

}

// Compare the performance of QTransform::scale() to

// QMatrix4x4::scale() after priming the matrix with a rotate().

void tst_QMatrix4x4::compareScaleAfterRotate_data()

{

    compareScale_data();

}

void tst_QMatrix4x4::compareScaleAfterRotate()

{

    QFETCH(bool, useQTransform);

    QFETCH(QVector3D, scale);

    qreal x = scale.x();

    qreal y = scale.y();

    qreal z = scale.z();

    if (useQTransform) {

        QTransform t;

        t.rotate(45.0f);

        QBENCHMARK {

            t.scale(x, y);

        }

    } else if (z == 1.0f) {

        QMatrix4x4 m;

        m.rotate(45.0f, 0, 0, 1);

        QBENCHMARK {

            m.scale(x, y);

        }

    } else {

        QMatrix4x4 m;

        m.rotate(45.0f, 0, 0, 1);

        QBENCHMARK {

            m.scale(x, y, z);

        }

    }

}

// Compare the performance of QTransform::rotate() to

// QMatrix4x4::rotate().