src/gui/painting/qpolygon.cpp

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/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qpolygon.h"
#include "qrect.h"
#include "qdatastream.h"
#include "qmatrix.h"
#include "qdebug.h"
#include "qpainterpath.h"
#include "qvariant.h"
#include "qpainterpath_p.h"
#include "qbezier_p.h"

#include <stdarg.h>

/*****************************************************************************
  QPolygon member functions
 *****************************************************************************/

QPolygon::QPolygon(const QRect &r, bool closed)
{
    reserve(closed ? 5 : 4);
    *this << QPoint(r.x(), r.y())
          << QPoint(r.x() + r.width(), r.y())
          << QPoint(r.x() + r.width(), r.y() + r.height())
          << QPoint(r.x(), r.y() + r.height());
    if (closed)
        *this << QPoint(r.left(), r.top());
}

QPolygon::QPolygon(int nPoints, const int *points)
{
    setPoints(nPoints, points);
}


void QPolygon::translate(int dx, int dy)
{
    register QPoint *p = data();
    register int i = size();
    QPoint pt(dx, dy);
    while (i--) {
        *p += pt;
        ++p;
    }
}

void QPolygon::point(int index, int *x, int *y) const
{
    QPoint p = at(index);
    if (x)
        *x = (int)p.x();
    if (y)
        *y = (int)p.y();
}

void QPolygon::setPoints(int nPoints, const int *points)
{
    resize(nPoints);
    int i = 0;
    while (nPoints--) {
        setPoint(i++, *points, *(points+1));
        points += 2;
    }
}

void QPolygon::setPoints(int nPoints, int firstx, int firsty, ...)
{
    va_list ap;
    resize(nPoints);
    setPoint(0, firstx, firsty);
    int i = 0, x, y;
    va_start(ap, firsty);
    while (--nPoints) {
        x = va_arg(ap, int);
        y = va_arg(ap, int);
        setPoint(++i, x, y);
    }
    va_end(ap);
}

void QPolygon::putPoints(int index, int nPoints, const int *points)
{
    if (index + nPoints > size())
        resize(index + nPoints);
    int i = index;
    while (nPoints--) {
        setPoint(i++, *points, *(points+1));
        points += 2;
    }
}

void QPolygon::putPoints(int index, int nPoints, int firstx, int firsty, ...)
{
    va_list ap;
    if (index + nPoints > size())
        resize(index + nPoints);
    if (nPoints <= 0)
        return;
    setPoint(index, firstx, firsty);
    int i = index, x, y;
    va_start(ap, firsty);
    while (--nPoints) {
        x = va_arg(ap, int);
        y = va_arg(ap, int);
        setPoint(++i, x, y);
    }
    va_end(ap);
}


void QPolygon::putPoints(int index, int nPoints, const QPolygon & from, int fromIndex)
{
    if (index + nPoints > size())
        resize(index + nPoints);
    if (nPoints <= 0)
        return;
    int n = 0;
    while(n < nPoints) {
        setPoint(index + n, from[fromIndex+n]);
        ++n;
    }
}


QRect QPolygon::boundingRect() const
{
    if (isEmpty())
        return QRect(0, 0, 0, 0);
    register const QPoint *pd = constData();
    int minx, maxx, miny, maxy;
    minx = maxx = pd->x();
    miny = maxy = pd->y();
    ++pd;
    for (int i = 1; i < size(); ++i) {
        if (pd->x() < minx)
            minx = pd->x();
        else if (pd->x() > maxx)
            maxx = pd->x();
        if (pd->y() < miny)
            miny = pd->y();
        else if (pd->y() > maxy)
            maxy = pd->y();
        ++pd;
    }
    return QRect(QPoint(minx,miny), QPoint(maxx,maxy));
}

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QPolygon &a)
{
#ifndef Q_BROKEN_DEBUG_STREAM
    dbg.nospace() << "QPolygon(";
    for (int i = 0; i < a.count(); ++i)
        dbg.nospace() << a.at(i);
    dbg.nospace() << ')';
    return dbg.space();
#else
    qWarning("This compiler doesn't support streaming QPolygon to QDebug");
    return dbg;
    Q_UNUSED(a);
#endif
}
#endif


/*****************************************************************************
  QPolygonF member functions
 *****************************************************************************/

QPolygonF::QPolygonF(const QRectF &r)
{
    reserve(5);
    append(QPointF(r.x(), r.y()));
    append(QPointF(r.x() + r.width(), r.y()));
    append(QPointF(r.x() + r.width(), r.y() + r.height()));
    append(QPointF(r.x(), r.y() + r.height()));
    append(QPointF(r.x(), r.y()));
}

QPolygonF::QPolygonF(const QPolygon &a)
{
    reserve(a.size());
    for (int i=0; i<a.size(); ++i)
        append(a.at(i));
}

void QPolygonF::translate(const QPointF &offset)
{
    register QPointF *p = data();
    register int i = size();
    while (i--) {
        *p += offset;
        ++p;
    }
}

QRectF QPolygonF::boundingRect() const
{
    if (isEmpty())
        return QRectF(0, 0, 0, 0);
    register const QPointF *pd = constData();
    qreal minx, maxx, miny, maxy;
    minx = maxx = pd->x();
    miny = maxy = pd->y();
    ++pd;
    for (int i = 1; i < size(); ++i) {
        if (pd->x() < minx)
            minx = pd->x();
        else if (pd->x() > maxx)
            maxx = pd->x();
        if (pd->y() < miny)
            miny = pd->y();
        else if (pd->y() > maxy)
            maxy = pd->y();
        ++pd;
    }
    return QRectF(minx,miny, maxx - minx, maxy - miny);
}

QPolygon QPolygonF::toPolygon() const
{
    QPolygon a;
    a.reserve(size());
    for (int i=0; i<size(); ++i)
        a.append(at(i).toPoint());
    return a;
}

QPolygon::operator QVariant() const
{
    return QVariant(QVariant::Polygon, this);
}

/*****************************************************************************
  QPolygonF stream functions
 *****************************************************************************/
#ifndef QT_NO_DATASTREAM

QDataStream &operator<<(QDataStream &s, const QPolygonF &a)
{
    quint32 len = a.size();
    uint i;

    s << len;
    for (i = 0; i < len; ++i)
        s << a.at(i);
    return s;
}

QDataStream &operator>>(QDataStream &s, QPolygonF &a)
{
    quint32 len;
    uint i;

    s >> len;
    a.reserve(a.size() + (int)len);
    QPointF p;
    for (i = 0; i < len; ++i) {
        s >> p;
        a.insert(i, p);
    }
    return s;
}
#endif //QT_NO_DATASTREAM

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QPolygonF &a)
{
#ifndef Q_BROKEN_DEBUG_STREAM
    dbg.nospace() << "QPolygonF(";
    for (int i = 0; i < a.count(); ++i)
        dbg.nospace() << a.at(i);
    dbg.nospace() << ')';
    return dbg.space();
#else
    qWarning("This compiler doesn't support streaming QPolygonF to QDebug");
    return dbg;
    Q_UNUSED(a);
#endif
}
#endif

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