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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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
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