/****************************************************************************

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** this package.

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

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** ensure the GNU Lesser General Public License version 2.1 requirements

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****************************************************************************/

#ifndef QPAINTERPATH_P_H

#define QPAINTERPATH_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of other Qt classes.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include "QtGui/qpainterpath.h"

#include "QtGui/qregion.h"

#include "QtCore/qlist.h"

#include "QtCore/qvarlengtharray.h"

#include <qdebug.h>

#include <private/qvectorpath_p.h>

#include <private/qstroker_p.h>

QT_BEGIN_NAMESPACE

class QPainterPathStrokerPrivate

{

public:

    QPainterPathStrokerPrivate();

    QStroker stroker;

    QVector<qfixed> dashPattern;

    qreal dashOffset;

};

class QPolygonF;

class QVectorPathConverter;

class QVectorPathConverter

{

public:

    QVectorPathConverter(const QVector<QPainterPath::Element> &path, uint fillRule)

        : pathData(path, fillRule),

          path(pathData.points.data(), path.size(),

               pathData.elements.data(), pathData.flags) {}

    const QVectorPath &vectorPath() {

        return path;

    }

    struct QVectorPathData {

        QVectorPathData(const QVector<QPainterPath::Element> &path, uint fillRule)

            : elements(path.size()),

              points(path.size() * 2),

              flags(0)

        {

            int ptsPos = 0;

            for (int i=0; i<path.size(); ++i) {

                const QPainterPath::Element &e = path.at(i);

                elements[i] = e.type;

                points[ptsPos++] = e.x;

                points[ptsPos++] = e.y;

                if (e.type == QPainterPath::CurveToElement)

                    flags |= QVectorPath::CurvedShapeHint;

            }

            if (fillRule == Qt::WindingFill)

                flags |= QVectorPath::WindingFill;

            else

                flags |= QVectorPath::OddEvenFill;

        }

        QVarLengthArray<QPainterPath::ElementType> elements;

        QVarLengthArray<qreal> points;

        uint flags;

    };

    QVectorPathData pathData;

    QVectorPath path;

private:

    Q_DISABLE_COPY(QVectorPathConverter)

};

class QPainterPathData : public QPainterPathPrivate

{

public:

    QPainterPathData() :

        cStart(0), fillRule(Qt::OddEvenFill),

        dirtyBounds(false), dirtyControlBounds(false),

        pathConverter(0)

    {

        ref = 1;

        require_moveTo = false;

    }

    QPainterPathData(const QPainterPathData &other) :

        QPainterPathPrivate(), cStart(other.cStart), fillRule(other.fillRule),

        dirtyBounds(other.dirtyBounds), bounds(other.bounds),

        dirtyControlBounds(other.dirtyControlBounds),

        controlBounds(other.controlBounds),

        pathConverter(0)

    {

        ref = 1;

        require_moveTo = false;

        elements = other.elements;

    }

    ~QPainterPathData() {

        delete pathConverter;

    }

    inline bool isClosed() const;

    inline void close();

    inline void maybeMoveTo();

    const QVectorPath &vectorPath() {

        if (!pathConverter)

            pathConverter = new QVectorPathConverter(elements, fillRule);

        return pathConverter->path;

    }

    int cStart;

    Qt::FillRule fillRule;

    bool require_moveTo;

    bool   dirtyBounds;

    QRectF bounds;

    bool   dirtyControlBounds;

    QRectF controlBounds;

    QVectorPathConverter *pathConverter;

};

inline const QPainterPath QVectorPath::convertToPainterPath() const

{

        QPainterPath path;

        path.ensureData();

        QPainterPathData *data = path.d_func();

        data->elements.reserve(m_count);

        int index = 0;

        data->elements[0].x = m_points[index++];

        data->elements[0].y = m_points[index++];

        if (m_elements) {

            data->elements[0].type = m_elements[0];

            for (int i=1; i<m_count; ++i) {

                QPainterPath::Element element;

                element.x = m_points[index++];

                element.y = m_points[index++];

                element.type = m_elements[i];

                data->elements << element;

            }

        } else {

            data->elements[0].type = QPainterPath::MoveToElement;

            for (int i=1; i<m_count; ++i) {

                QPainterPath::Element element;

                element.x = m_points[index++];

                element.y = m_points[index++];

                element.type = QPainterPath::LineToElement;

                data->elements << element;

            }

        }

        if (m_hints & OddEvenFill)

            data->fillRule = Qt::OddEvenFill;

        else

            data->fillRule = Qt::WindingFill;

        return path;

}

void Q_GUI_EXPORT qt_find_ellipse_coords(const QRectF &r, qreal angle, qreal length,

                                         QPointF* startPoint, QPointF *endPoint);

inline bool QPainterPathData::isClosed() const

{

    const QPainterPath::Element &first = elements.at(cStart);

    const QPainterPath::Element &last = elements.last();

    return first.x == last.x && first.y == last.y;

}

inline void QPainterPathData::close()

{

    Q_ASSERT(ref == 1);

    require_moveTo = true;

    const QPainterPath::Element &first = elements.at(cStart);

    QPainterPath::Element &last = elements.last();

    if (first.x != last.x || first.y != last.y) {

        if (qFuzzyCompare(first.x, last.x) && qFuzzyCompare(first.y, last.y)) {

            last.x = first.x;

            last.y = first.y;

        } else {

            QPainterPath::Element e = { first.x, first.y, QPainterPath::LineToElement };

            elements << e;

        }

    }

}

inline void QPainterPathData::maybeMoveTo()

{

    if (require_moveTo) {

        QPainterPath::Element e = elements.last();

        e.type = QPainterPath::MoveToElement;

        elements.append(e);

        require_moveTo = false;

    }

}

#define KAPPA 0.5522847498

QT_END_NAMESPACE

#endif // QPAINTERPATH_P_H