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84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Copyright (C) 2016-2020 Ivailo Monev
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**
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** This file is part of the QtGui module of the Katie Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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**
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qt_x11_p.h"
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#include <limits.h>
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QT_BEGIN_NAMESPACE
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QRegion::QRegionData QRegion::shared_empty = { QAtomicInt(1), 0, 0, 0};
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void QRegion::updateX11Region() const
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{
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d->rgn = XCreateRegion();
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if (!d->qt_rgn)
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return;
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int n = d->qt_rgn->numRects;
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const QRect *rect = (n == 1 ? &d->qt_rgn->extents : d->qt_rgn->rects.constData());
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while (n--) {
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XRectangle r;
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r.x = qMax(SHRT_MIN, rect->x());
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r.y = qMax(SHRT_MIN, rect->y());
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r.width = qMin((int)USHRT_MAX, rect->width());
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r.height = qMin((int)USHRT_MAX, rect->height());
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XUnionRectWithRegion(&r, d->rgn, d->rgn);
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++rect;
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}
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}
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void *QRegion::clipRectangles(int &num) const
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{
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if (!d->xrectangles && !(d == &shared_empty || d->qt_rgn->numRects == 0)) {
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XRectangle *r = static_cast<XRectangle*>(malloc(d->qt_rgn->numRects * sizeof(XRectangle)));
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d->xrectangles = r;
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int n = d->qt_rgn->numRects;
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const QRect *rect = (n == 1 ? &d->qt_rgn->extents : d->qt_rgn->rects.constData());
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while (n--) {
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r->x = qMax(SHRT_MIN, rect->x());
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r->y = qMax(SHRT_MIN, rect->y());
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r->width = qMin((int)USHRT_MAX, rect->width());
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r->height = qMin((int)USHRT_MAX, rect->height());
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++r;
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++rect;
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}
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}
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if (d == &shared_empty || d->qt_rgn->numRects == 0)
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num = 0;
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else
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num = d->qt_rgn->numRects;
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return d->xrectangles;
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}
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QT_END_NAMESPACE
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