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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <private/qt_x11_p.h>
#include <limits.h>
QT_BEGIN_NAMESPACE
QRegion::QRegionData QRegion::shared_empty = {Q_BASIC_ATOMIC_INITIALIZER(1), 0, 0, 0};
void QRegion::updateX11Region() const
{
d->rgn = XCreateRegion();
if (!d->qt_rgn)
return;
int n = d->qt_rgn->numRects;
const QRect *rect = (n == 1 ? &d->qt_rgn->extents : d->qt_rgn->rects.constData());
while (n--) {
XRectangle r;
r.x = qMax(SHRT_MIN, rect->x());
r.y = qMax(SHRT_MIN, rect->y());
r.width = qMin((int)USHRT_MAX, rect->width());
r.height = qMin((int)USHRT_MAX, rect->height());
XUnionRectWithRegion(&r, d->rgn, d->rgn);
++rect;
}
}
void *QRegion::clipRectangles(int &num) const
{
if (!d->xrectangles && !(d == &shared_empty || d->qt_rgn->numRects == 0)) {
XRectangle *r = static_cast<XRectangle*>(malloc(d->qt_rgn->numRects * sizeof(XRectangle)));
d->xrectangles = r;
int n = d->qt_rgn->numRects;
const QRect *rect = (n == 1 ? &d->qt_rgn->extents : d->qt_rgn->rects.constData());
while (n--) {
r->x = qMax(SHRT_MIN, rect->x());
r->y = qMax(SHRT_MIN, rect->y());
r->width = qMin((int)USHRT_MAX, rect->width());
r->height = qMin((int)USHRT_MAX, rect->height());
++r;
++rect;
}
}
if (d == &shared_empty || d->qt_rgn->numRects == 0)
num = 0;
else
num = d->qt_rgn->numRects;
return d->xrectangles;
}
QT_END_NAMESPACE
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