source: trunk/src/gui/painting/qstroker_p.h@ 986

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**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
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** This file is part of the QtGui module of the Qt Toolkit.
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** accordance with the Qt Commercial License Agreement provided with the
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** GNU General Public License Usage
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#ifndef QSTROKER_P_H
#define QSTROKER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "QtGui/qpainterpath.h"
#include "private/qdatabuffer_p.h"
#include "private/qnumeric_p.h"

QT_BEGIN_NAMESPACE

// #define QFIXED_IS_26_6

#if defined QFIXED_IS_26_6
typedef int qfixed;
#define qt_real_to_fixed(real) qfixed(real * 64)
#define qt_int_to_fixed(real) qfixed(int(real) << 6)
#define qt_fixed_to_real(fixed) qreal(fixed / qreal(64))
#define qt_fixed_to_int(fixed) int(fixed >> 6)
struct qfixed2d
{
    qfixed x;
    qfixed y;

    bool operator==(const qfixed2d &other) const { return x == other.x && y == other.y; }
};
#elif defined QFIXED_IS_32_32
typedef qint64 qfixed;
#define qt_real_to_fixed(real) qfixed(real * double(qint64(1) << 32))
#define qt_fixed_to_real(fixed) qreal(fixed / double(qint64(1) << 32))
struct qfixed2d
{
    qfixed x;
    qfixed y;

    bool operator==(const qfixed2d &other) const { return x == other.x && y == other.y; }
};
#elif defined QFIXED_IS_16_16
typedef int qfixed;
#define qt_real_to_fixed(real) qfixed(real * qreal(1 << 16))
#define qt_fixed_to_real(fixed) qreal(fixed / qreal(1 << 16))
struct qfixed2d
{
    qfixed x;
    qfixed y;

    bool operator==(const qfixed2d &other) const { return x == other.x && y == other.y; }
};
#else
typedef qreal qfixed;
#define qt_real_to_fixed(real) qfixed(real)
#define qt_fixed_to_real(fixed) fixed
struct qfixed2d
{
    qfixed x;
    qfixed y;

    bool operator==(const qfixed2d &other) const { return qFuzzyCompare(x, other.x)
                                                       && qFuzzyCompare(y, other.y); }
};
#endif

#define QT_PATH_KAPPA 0.5522847498

QPointF qt_curves_for_arc(const QRectF &rect, qreal startAngle, qreal sweepLength,
                          QPointF *controlPoints, int *point_count);

qreal qt_t_for_arc_angle(qreal angle);

typedef void (*qStrokerMoveToHook)(qfixed x, qfixed y, void *data);
typedef void (*qStrokerLineToHook)(qfixed x, qfixed y, void *data);
typedef void (*qStrokerCubicToHook)(qfixed c1x, qfixed c1y,
                                    qfixed c2x, qfixed c2y,
                                    qfixed ex, qfixed ey,
                                    void *data);

// qtransform.cpp
Q_GUI_EXPORT bool qt_scaleForTransform(const QTransform &transform, qreal *scale);