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

**

** 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 QtGui module 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 QTESSELATOR_P_H

#define QTESSELATOR_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 <qpoint.h>

#include <qrect.h>

QT_BEGIN_NAMESPACE

class QTessellatorPrivate;

typedef int Q27Dot5;

#define Q27Dot5ToDouble(i) ((i)/32.)

#define FloatToQ27Dot5(i) (int)((i) * 32)

#define IntToQ27Dot5(i) ((i) << 5)

#define Q27Dot5ToXFixed(i) ((i) << 11)

#define Q27Dot5Factor 32

class Q_GUI_EXPORT QTessellator {

public:

    QTessellator();

    virtual ~QTessellator();

    QRectF tessellate(const QPointF *points, int nPoints);

    void tessellateConvex(const QPointF *points, int nPoints);

    void tessellateRect(const QPointF &a, const QPointF &b, qreal width);

    void setWinding(bool w);

    struct Vertex {

        Q27Dot5 x;

        Q27Dot5 y;

    };

    struct Trapezoid {

        Q27Dot5 top;

        Q27Dot5 bottom;

        const Vertex *topLeft;

        const Vertex *bottomLeft;

        const Vertex *topRight;

        const Vertex *bottomRight;

    };

    virtual void addTrap(const Trapezoid &trap) = 0;

private:

    friend class QTessellatorPrivate;

    QTessellatorPrivate *d;

};

QT_END_NAMESPACE

#endif