source: trunk/src/gui/painting/qregion_x11.cpp@ 5

Last change on this file since 5 was 2, checked in by Dmitry A. Kuminov, 17 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 3.4 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information ([email protected])
5**
6** This file is part of the QtGui module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
10** Licensees holding valid Qt Commercial licenses may use this file in
11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
16** Alternatively, this file may be used under the terms of the GNU Lesser
17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
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24** additional rights. These rights are described in the Nokia Qt LGPL
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28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
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40****************************************************************************/
41
42#include <private/qt_x11_p.h>
43
44#include <limits.h>
45
46QT_BEGIN_NAMESPACE
47
48QRegion::QRegionData QRegion::shared_empty = {Q_BASIC_ATOMIC_INITIALIZER(1), 0, 0, 0};
49
50void QRegion::updateX11Region() const
51{
52 d->rgn = XCreateRegion();
53 if (!d->qt_rgn)
54 return;
55
56 int n = d->qt_rgn->numRects;
57 const QRect *rect = (n == 1 ? &d->qt_rgn->extents : d->qt_rgn->rects.constData());
58 while (n--) {
59 XRectangle r;
60 r.x = qMax(SHRT_MIN, rect->x());
61 r.y = qMax(SHRT_MIN, rect->y());
62 r.width = qMin((int)USHRT_MAX, rect->width());
63 r.height = qMin((int)USHRT_MAX, rect->height());
64 XUnionRectWithRegion(&r, d->rgn, d->rgn);
65 ++rect;
66 }
67}
68
69void *QRegion::clipRectangles(int &num) const
70{
71 if (!d->xrectangles && !(d == &shared_empty || d->qt_rgn->numRects == 0)) {
72 XRectangle *r = static_cast<XRectangle*>(malloc(d->qt_rgn->numRects * sizeof(XRectangle)));
73 d->xrectangles = r;
74 int n = d->qt_rgn->numRects;
75 const QRect *rect = (n == 1 ? &d->qt_rgn->extents : d->qt_rgn->rects.constData());
76 while (n--) {
77 r->x = qMax(SHRT_MIN, rect->x());
78 r->y = qMax(SHRT_MIN, rect->y());
79 r->width = qMin((int)USHRT_MAX, rect->width());
80 r->height = qMin((int)USHRT_MAX, rect->height());
81 ++r;
82 ++rect;
83 }
84 }
85 if (d == &shared_empty || d->qt_rgn->numRects == 0)
86 num = 0;
87 else
88 num = d->qt_rgn->numRects;
89 return d->xrectangles;
90}
91
92QT_END_NAMESPACE
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