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#include <qtest.h>

#include <QPainter>

#include <QPixmap>

#include <QDialog>

#include <QImage>

#include <QPaintEngine>

Q_DECLARE_METATYPE(QLine)

Q_DECLARE_METATYPE(QRect)

Q_DECLARE_METATYPE(QSize)

Q_DECLARE_METATYPE(QPoint)

Q_DECLARE_METATYPE(QPainterPath)

Q_DECLARE_METATYPE(QPainter::RenderHint)

Q_DECLARE_METATYPE(QPainter::CompositionMode)

Q_DECLARE_METATYPE(QImage::Format)

enum PrimitiveType {

    Primitive_Int_DiagLine,

    Primitive_Int_VerLine,

    Primitive_Int_HorLine,

    Primitive_Int_Rect,

    Primitive_Int_Ellipse,

    Primitive_Int_Pie,

    Primitive_Int_Arc,

    Primitive_Int_Chord,

    Primitive_Int_TriPoly,

    Primitive_Int_RectPoly,

    Primitive_Int_2RectPoly,

    Primitive_Float_DiagLine,

    Primitive_Float_VerLine,

    Primitive_Float_HorLine,

    Primitive_Float_Rect,

    Primitive_Float_Ellipse,

    Primitive_Float_Pie,

    Primitive_Float_Arc,

    Primitive_Float_Chord,

    Primitive_Float_TriPoly,

    Primitive_Float_RectPoly,

    Primitive_Float_2RectPoly,

    Primitive_Float_TriPath,

    Primitive_Float_RectPath,

    Primitive_Float_2RectPath,

    Primitive_Float_EllipsePath,

    Primitive_Last_Primitive

};

enum StateChanges {

    ChangePen         = 0x0001,

    ChangeBrush       = 0x0002,

    ChangeClip        = 0x0004,

    ChangeTransform   = 0x0008

};

struct PrimitiveSet {

    QRect i_rect;

    QLine i_line_diag;

    QLine i_line_ver;

    QLine i_line_hor;

    QPolygon i_poly_tri;

    QPolygon i_poly_2rects;

    QPolygon i_poly_rect;

    QRectF f_rect;

    QLineF f_line_diag;

    QLineF f_line_ver;

    QLineF f_line_hor;

    QPolygonF f_poly_tri;

    QPolygonF f_poly_2rects;

    QPolygonF f_poly_rect;

    QPainterPath f_path_tri;

    QPainterPath f_path_2rects;

    QPainterPath f_path_rect;

    QPainterPath f_path_ellipse;

};

class tst_QPainter : public QObject

{

    Q_OBJECT

    public:

    tst_QPainter()

    {

        setupBrushes();

        createPrimitives();

        m_surface = surface();

    }

private slots:

    void beginAndEnd();

    void saveRestore_data();

    void saveRestore();

    void drawLine_data();

    void drawLine();

    void drawLine_clipped_data();

    void drawLine_clipped();

    void drawLine_antialiased_clipped_data();

    void drawLine_antialiased_clipped();

    void drawPixmap_data();

    void drawPixmap();

    void drawImage_data();

    void drawImage();

    void drawTiledPixmap_data();

    void drawTiledPixmap();

    void compositionModes_data();

    void compositionModes();

    void fillPrimitives_10_data() { drawPrimitives_data_helper(false); }

    void fillPrimitives_100_data() { drawPrimitives_data_helper(false); }

    void fillPrimitives_1000_data() { drawPrimitives_data_helper(false); }

    void fillPrimitives_10();

    void fillPrimitives_100();

    void fillPrimitives_1000();

    void strokePrimitives_10_data() { drawPrimitives_data_helper(true); }

    void strokePrimitives_100_data() { drawPrimitives_data_helper(true); }

    void strokePrimitives_1000_data() { drawPrimitives_data_helper(true); }

    void strokePrimitives_10();

    void strokePrimitives_100();

    void strokePrimitives_1000();

    void drawText_data();

    void drawText();

    void clipAndFill_data();

    void clipAndFill();

private:

    void setupBrushes();

    void createPrimitives();

    void drawPrimitives_data_helper(bool fancypens);

    void fillPrimitives_helper(QPainter *painter, PrimitiveType type, PrimitiveSet *s);

    QPaintDevice *surface()

    {

        return new QPixmap(1024, 1024);

    }

    QMap<QString, QPen> m_pens;

    QMap<QString, QBrush> m_brushes;

    PrimitiveSet m_primitives_10;

    PrimitiveSet m_primitives_100;

    PrimitiveSet m_primitives_1000;

    QPaintDevice *m_surface;

    QPainter m_painter;

};

void tst_QPainter::createPrimitives()

{

    for (int i=0; i<3; ++i) {

        PrimitiveSet *ps;

        int size;

        switch (i) {

        case 0:

            ps = &m_primitives_10;

            size = 10;

            break;

        case 1:

            ps = &m_primitives_100;

            size = 100;

            break;

        case 2:

            ps = &m_primitives_1000;

            size = 1000;

            break;

        }

        ps->f_rect = QRectF(0, 0, size, size);

        ps->f_line_diag = QLineF(0, 0, size, size);

        ps->f_line_ver = QLineF(10, 0, 10, size);

        ps->f_line_hor = QLineF(0, 10, size, 10);

        ps->f_poly_rect = QPolygonF() << QPointF(0, 0)

                                      << QPointF(size, 0)

                                      << QPointF(size, size)

                                      << QPointF(0, size);

        ps->f_poly_2rects = QPolygonF() << QPointF(0, 0)

                                        << QPointF(size * 0.75, 0)

                                        << QPointF(size * 0.75, size * 0.75)

                                        << QPointF(size * 0.25, size * 0.75)

                                        << QPointF(size * 0.25, size * 0.25)

                                        << QPointF(size, size * 0.25)

                                        << QPointF(size, size)

                                        << QPointF(0, size);

        ps->f_poly_tri = QPolygonF() << QPointF(size / 2.0, 0)

                                     << QPointF(0, size)

                                     << QPointF(size, size);

        ps->f_path_tri.addPolygon(ps->f_poly_tri);

        ps->f_path_rect.addRect(ps->f_rect);

        ps->f_path_2rects.addPolygon(ps->f_poly_2rects);

        ps->f_path_ellipse.addEllipse(ps->f_rect);

        ps->i_rect = ps->f_rect.toRect();

        ps->i_line_diag = ps->f_line_diag.toLine();

        ps->i_line_hor = ps->f_line_hor.toLine();

        ps->i_line_ver = ps->f_line_ver.toLine();

        ps->i_poly_tri = ps->f_poly_tri.toPolygon();

        ps->i_poly_rect = ps->f_poly_rect.toPolygon();

        ps->i_poly_2rects = ps->f_poly_2rects.toPolygon();

    }

}

void tst_QPainter::drawLine_data()

{

    QTest::addColumn<QLine>("line");

    QTest::addColumn<QPen>("pen");

    QVector<QPen> pens;

    pens << QPen(Qt::black)

         << QPen(Qt::black, 0, Qt::DashDotLine)

         << QPen(Qt::black, 4)

         << QPen(Qt::black, 4, Qt::DashDotLine)

         << QPen(QColor(255, 0, 0, 200))

         << QPen(QColor(255, 0, 0, 200), 0, Qt::DashDotLine)

         << QPen(QColor(255, 0, 0, 200), 4)

         << QPen(QColor(255, 0, 0, 200), 4, Qt::DashDotLine);

    QStringList penNames;

    penNames << "black-0"

             << "black-0-dashdot"

             << "black-4"

             << "black-4-dashdot"

             << "alpha-0"

             << "alpha-0-dashdot"

             << "alpha-4"

             << "alpha-4-dashdot";

    int i = 0;

    foreach (QPen pen, pens) {

        const QString s = QString(QLatin1String("%1:%2")).arg(penNames[i]);

        QTest::newRow(qPrintable(s.arg("horizontal")))

            << QLine(0, 20, 100, 20) << pen;

        QTest::newRow(qPrintable(s.arg("vertical:")))

            << QLine(20, 0, 20, 100) << pen;

        QTest::newRow(qPrintable(s.arg("0-45:")))

            << QLine(0, 20, 100, 0) << pen;

        QTest::newRow(qPrintable(s.arg("45-90:")))

            << QLine(0, 100, 20, 0) << pen;

        QTest::newRow(qPrintable(s.arg("90-135:")))

            << QLine(20, 100, 0, 0) << pen;

        QTest::newRow(qPrintable(s.arg("135-180:")))

            << QLine(100, 20, 0, 0) << pen;

        QTest::newRow(qPrintable(s.arg("180-225:")))

            << QLine(100, 0, 0, 20) << pen;

        QTest::newRow(qPrintable(s.arg("225-270:")))

            << QLine(20, 0, 0, 100) << pen;

        QTest::newRow(qPrintable(s.arg("270-315:")))

            << QLine(0, 0, 20, 100) << pen;

        QTest::newRow(qPrintable(s.arg("315-360:")))

            << QLine(0, 0, 100, 20) << pen;

        ++i;

    }

}

void tst_QPainter::setupBrushes()

{

    // Solid brushes...

    m_brushes["black-brush"] = QBrush(Qt::black);

    m_brushes["white-brush"] = QBrush(Qt::white);

    m_brushes["transparent-brush"] = QBrush(QColor(255, 255, 255, 0));

    m_brushes["alpha1-brush"] = QBrush(QColor(255, 255, 255, 100));

    m_brushes["alpha2-brush"] = QBrush(QColor(255, 255, 255, 200));

    // Patterns

    m_brushes["dense1-brush"] = QBrush(Qt::Dense1Pattern);

    m_brushes["dense2-brush"] = QBrush(Qt::Dense2Pattern);

    m_brushes["dense3-brush"] = QBrush(Qt::Dense3Pattern);

    m_brushes["dense4-brush"] = QBrush(Qt::Dense4Pattern);

    m_brushes["dense5-brush"] = QBrush(Qt::Dense5Pattern);

    m_brushes["dense6-brush"] = QBrush(Qt::Dense6Pattern);

    m_brushes["dense7-brush"] = QBrush(Qt::Dense7Pattern);

    m_brushes["hor-brush"] = QBrush(Qt::HorPattern);

    m_brushes["ver-brush"] = QBrush(Qt::VerPattern);

    m_brushes["cross-brush"] = QBrush(Qt::CrossPattern);

    m_brushes["bdiag-brush"] = QBrush(Qt::BDiagPattern);

    m_brushes["fdiag-brush"] = QBrush(Qt::FDiagPattern);

    m_brushes["diagcross-brush"] = QBrush(Qt::DiagCrossPattern);

    // Gradients

    QGradientStops gradient_white_black;

    gradient_white_black << QPair<qreal, QColor>(0, QColor(Qt::white));

    gradient_white_black << QPair<qreal, QColor>(1, QColor(Qt::black));

    QGradientStops gradient_white_black10;

    for (int i=0; i<10; ++i) {

        gradient_white_black10 << QPair<qreal, QColor>(i/10.0, QColor(Qt::white));

        gradient_white_black10 << QPair<qreal, QColor>(i/10.0+0.05, QColor(Qt::black));

    }

    QGradientStops gradient_white_alpha;

    gradient_white_alpha << QPair<qreal, QColor>(0, QColor(Qt::white));

    gradient_white_alpha << QPair<qreal, QColor>(0, QColor(Qt::transparent));

    QGradientStops gradient_white_alpha10;

    for (int i=0; i<10; ++i) {

        gradient_white_alpha10 << QPair<qreal, QColor>(i/10.0, QColor(Qt::white));

        gradient_white_alpha10 << QPair<qreal, QColor>(i/10.0+0.05, QColor(Qt::black));

    }

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

        QLinearGradient lg;

        lg.setStart(0, 0);

        QRadialGradient rg;

        QConicalGradient cg;

        QGradientStops stops;

        if (j == 0) stops = gradient_white_black;

        else if (j == 1) stops = gradient_white_black10;

        else if (j == 2) stops = gradient_white_alpha;

        else if (j == 3) stops = gradient_white_alpha10;

        lg.setStops(stops);

        rg.setStops(stops);

        cg.setStops(stops);

        for (int i=0; i<6; ++i) {

            lg.setSpread((QGradient::Spread) (i % 3));

            lg.setCoordinateMode((QGradient::CoordinateMode) (j / 3));

            QString name = QString::fromLatin1("-%1%2")

                           .arg(lg.spread())

                           .arg(lg.coordinateMode());

            lg.setFinalStop(100, 0);

            m_brushes["hor-lingrad-w/b-brush" + name] = QBrush(lg);

            lg.setFinalStop(0, 100);

            m_brushes["ver-lingrad-w/b-brush" + name] = QBrush(lg);

            lg.setFinalStop(100, 100);

            m_brushes["diag-lingrad-w/b-brush" + name] = QBrush(lg);

            rg.setRadius(100);

            rg.setCenter(0, 0);

            rg.setFocalPoint(50, 50);

            m_brushes["radgrad-brush" + name] = QBrush(rg);

            cg.setCenter(0, 0);

            cg.setAngle(40);

            m_brushes["congrad-brush" + name] = QBrush(cg);

        }

    }

    // Set up pens...

//     m_pens["black-pen"] = QPen(Qt::black);

//     m_pens["white-pen"] = QPen(Qt::white);

//     m_pens["transparent-pen"] = QPen(QColor(255, 255, 255, 0));

//     m_pens["translucent1-pen"] = QPen(QColor(255, 255, 255, 100));

//     m_pens["translucent2-pen"] = QPen(QColor(255, 255, 255, 200));

}

// void QPainter_Primitives::fillRect_data() {

//     QTest::addColumn<QBrush>("brush");

//     QTest::addColumn<QSize>("size");

//     for (QMap<QString, QBrush>::const_iterator it = m_brushes.constBegin();

//          it != m_brushes.constEnd(); ++it) {

//         for (int w=2; w<1025; w*=2) {

//             for (int h=2; h<1025; h*=2) {

//                 QTest::newRow(QString("brush=%1; size=[%2,%3]").arg(it.key()).arg(w).arg(h).toAscii().data())

//                     << *it << QSize(w, h);

//             }

//         }

//     }

// }

// void QPainter_Primitives::fillRect()

// {

//     QFETCH(QBrush, brush);

//     QFETCH(QSize, size);

//     QImage img(1024, 1024, QImage::Format_ARGB32_Premultiplied);

//     QPainter p(&img);

//     p.setPen(Qt::NoPen);

//     p.setBrush(brush);

//     QRect rect(QPoint(0, 0), size);

//     QBENCHMARK {

//         p.drawRect(rect);

//     }

// }

void tst_QPainter::beginAndEnd()

{

    QPixmap pixmap(100, 100);

    QBENCHMARK {

        QPainter p;

        p.begin(&pixmap);

        p.end();

    }

}

void tst_QPainter::drawLine()

{

    QFETCH(QLine, line);

    QFETCH(QPen, pen);

    const int offset = 5;

    QPixmap pixmapUnclipped(qMin(line.x1(), line.x2())

                            + 2*offset + qAbs(line.dx()),

                            qMin(line.y1(), line.y2())

                            + 2*offset + qAbs(line.dy()));

    pixmapUnclipped.fill(Qt::white);

    QPainter p(&pixmapUnclipped);

    p.translate(offset, offset);

    p.setPen(pen);

    p.paintEngine()->syncState();

    QBENCHMARK {

        p.drawLine(line);

    }

    p.end();

}

void tst_QPainter::drawLine_clipped_data()

{

    drawLine_data();

}

void tst_QPainter::drawLine_clipped()

{

    QFETCH(QLine, line);

    QFETCH(QPen, pen);

    const int offset = 5;

    QPixmap pixmapClipped(qMin(line.x1(), line.x2())

                          + 2*offset + qAbs(line.dx()),

                          qMin(line.y1(), line.y2())

                          + 2*offset + qAbs(line.dy()));

    const QRect clip = QRect(line.p1(), line.p2()).normalized();

    pixmapClipped.fill(Qt::white);

    QPainter p(&pixmapClipped);

    p.translate(offset, offset);

    p.setClipRect(clip);

    p.setPen(pen);

    p.paintEngine()->syncState();

    QBENCHMARK {

        p.drawLine(line);

    }

    p.end();

}

void tst_QPainter::drawLine_antialiased_clipped_data()

{

    drawLine_data();

}