qsize.cpp

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** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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#include "qsize.h"
#include "qdatastream.h"
 
#include <private/qdebug_p.h>
 
QT_BEGIN_NAMESPACE
 
/*****************************************************************************
  QSize member functions
 *****************************************************************************/
 
void QSize::transpose() noexcept
{
    qSwap(wd, ht);
}
 
QSize QSize::scaled(const QSize &s, Qt::AspectRatioMode mode) const noexcept
{
    if (mode == Qt::IgnoreAspectRatio || wd == 0 || ht == 0) {
        return s;
    } else {
        bool useHeight;
        qint64 rw = qint64(s.ht) * qint64(wd) / qint64(ht);
 
        if (mode == Qt::KeepAspectRatio) {
            useHeight = (rw <= s.wd);
        } else { // mode == Qt::KeepAspectRatioByExpanding
            useHeight = (rw >= s.wd);
        }
 
        if (useHeight) {
            return QSize(rw, s.ht);
        } else {
            return QSize(s.wd,
                         qint32(qint64(s.wd) * qint64(ht) / qint64(wd)));
        }
    }
}
 
/*****************************************************************************
  QSize stream functions
 *****************************************************************************/
#ifndef QT_NO_DATASTREAM
QDataStream &operator<<(QDataStream &s, const QSize &sz)
{
    if (s.version() == 1)
        s << (qint16)sz.width() << (qint16)sz.height();
    else
        s << (qint32)sz.width() << (qint32)sz.height();
    return s;
}
 
QDataStream &operator>>(QDataStream &s, QSize &sz)
{
    if (s.version() == 1) {
        qint16 w, h;
        s >> w;  sz.rwidth() = w;
        s >> h;  sz.rheight() = h;
    }
    else {
        qint32 w, h;
        s >> w;  sz.rwidth() = w;
        s >> h;  sz.rheight() = h;
    }
    return s;
}
#endif // QT_NO_DATASTREAM
 
#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QSize &s)
{
    QDebugStateSaver saver(dbg);
    dbg.nospace();
    dbg << "QSize(";
    QtDebugUtils::formatQSize(dbg, s);
    dbg << ')';
    return dbg;
}
#endif
 
 
 
/*****************************************************************************
  QSizeF member functions
 *****************************************************************************/
 
void QSizeF::transpose() noexcept
{
    qSwap(wd, ht);
}
 
QSizeF QSizeF::scaled(const QSizeF &s, Qt::AspectRatioMode mode) const noexcept
{
    if (mode == Qt::IgnoreAspectRatio || qIsNull(wd) || qIsNull(ht)) {
        return s;
    } else {
        bool useHeight;
        qreal rw = s.ht * wd / ht;
 
        if (mode == Qt::KeepAspectRatio) {
            useHeight = (rw <= s.wd);
        } else { // mode == Qt::KeepAspectRatioByExpanding
            useHeight = (rw >= s.wd);
        }
 
        if (useHeight) {
            return QSizeF(rw, s.ht);
        } else {
            return QSizeF(s.wd, s.wd * ht / wd);
        }
    }
}
 
/*****************************************************************************
  QSizeF stream functions
 *****************************************************************************/
#ifndef QT_NO_DATASTREAM
QDataStream &operator<<(QDataStream &s, const QSizeF &sz)
{
    s << double(sz.width()) << double(sz.height());
    return s;
}
 
QDataStream &operator>>(QDataStream &s, QSizeF &sz)
{
    double w, h;
    s >> w;
    s >> h;
    sz.setWidth(qreal(w));
    sz.setHeight(qreal(h));
    return s;
}
#endif // QT_NO_DATASTREAM
 
#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QSizeF &s)
{
    QDebugStateSaver saver(dbg);
    dbg.nospace();
    dbg << "QSizeF(";
    QtDebugUtils::formatQSize(dbg, s);
    dbg << ')';
    return dbg;
}
#endif
 
QT_END_NAMESPACE