diff options
Diffstat (limited to 'src/widgets/platforms/x11/qregion_x11.cpp')
-rw-r--r-- | src/widgets/platforms/x11/qregion_x11.cpp | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/src/widgets/platforms/x11/qregion_x11.cpp b/src/widgets/platforms/x11/qregion_x11.cpp new file mode 100644 index 0000000000..a96ec6dc96 --- /dev/null +++ b/src/widgets/platforms/x11/qregion_x11.cpp @@ -0,0 +1,92 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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 1.1, 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 |