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/****************************************************************************
**
** 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qatomic.h"
#include "qbitmap.h"
#include "qbuffer.h"
#include "qimage.h"
#include "qpolygon.h"
#include "qregion.h"
#include "qt_windows.h"
#include "qpainterpath.h"
QT_BEGIN_NAMESPACE
QRegion::QRegionData QRegion::shared_empty = { Q_BASIC_ATOMIC_INITIALIZER(1), 0, 0 };
HRGN qt_tryCreateRegion(QRegion::RegionType type, int left, int top, int right, int bottom)
{
const int tries = 10;
for (int i = 0; i < tries; ++i) {
HRGN region = 0;
switch (type) {
case QRegion::Rectangle:
region = CreateRectRgn(left, top, right, bottom);
break;
case QRegion::Ellipse:
#ifndef Q_OS_WINCE
region = CreateEllipticRgn(left, top, right, bottom);
#endif
break;
}
if (region) {
if (GetRegionData(region, 0, 0))
return region;
else
DeleteObject(region);
}
}
return 0;
}
QRegion qt_region_from_HRGN(HRGN rgn)
{
int numBytes = GetRegionData(rgn, 0, 0);
if (numBytes == 0)
return QRegion();
char *buf = new char[numBytes];
if (buf == 0)
return QRegion();
RGNDATA *rd = reinterpret_cast<RGNDATA*>(buf);
if (GetRegionData(rgn, numBytes, rd) == 0) {
delete [] buf;
return QRegion();
}
QRegion region;
RECT *r = reinterpret_cast<RECT*>(rd->Buffer);
for (uint i = 0; i < rd->rdh.nCount; ++i) {
QRect rect;
rect.setCoords(r->left, r->top, r->right - 1, r->bottom - 1);
++r;
region |= rect;
}
delete [] buf;
return region;
}
void qt_win_dispose_rgn(HRGN r)
{
if (r)
DeleteObject(r);
}
static void qt_add_rect(HRGN &winRegion, QRect r)
{
HRGN rgn = CreateRectRgn(r.left(), r.top(), r.x() + r.width(), r.y() + r.height());
if (rgn) {
HRGN dest = CreateRectRgn(0,0,0,0);
int result = CombineRgn(dest, winRegion, rgn, RGN_OR);
if (result) {
DeleteObject(winRegion);
winRegion = dest;
}
DeleteObject(rgn);
}
}
void QRegion::ensureHandle() const
{
if (d->rgn)
DeleteObject(d->rgn);
d->rgn = CreateRectRgn(0,0,0,0);
if (d->qt_rgn) {
if (d->qt_rgn->numRects == 1) {
QRect r = d->qt_rgn->extents;
qt_add_rect(d->rgn, r);
return;
}
for (int i = 0;i < d->qt_rgn->numRects;i++) {
QRect r = d->qt_rgn->rects.at(i);
qt_add_rect(d->rgn, r);
}
}
}
QT_END_NAMESPACE
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