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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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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