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**+ −
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+ −
** All rights reserved.+ −
** Contact: Nokia Corporation (qt-info@nokia.com)+ −
**+ −
** This file is part of the examples of the Qt Toolkit.+ −
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** $QT_BEGIN_LICENSE:LGPL$+ −
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** 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+ −
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** In addition, as a special exception, Nokia gives you certain additional+ −
** rights. These rights are described in the Nokia Qt LGPL Exception+ −
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** If you have questions regarding the use of this file, please contact+ −
** Nokia at qt-info@nokia.com.+ −
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** $QT_END_LICENSE$+ −
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****************************************************************************/+ −
+ −
#include <QImage>+ −
#include <QList>+ −
#include <QThread>+ −
#include <QDebug>+ −
#include <QApplication>+ −
#include <qtconcurrentmap.h>+ −
+ −
#ifndef QT_NO_CONCURRENT+ −
+ −
QImage scale(const QImage &image)+ −
{+ −
qDebug() << "Scaling image in thread" << QThread::currentThread();+ −
return image.scaled(QSize(100, 100), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);+ −
}+ −
+ −
int main(int argc, char *argv[])+ −
{+ −
QApplication app(argc, argv);+ −
+ −
const int imageCount = 20;+ −
+ −
// Create a list containing imageCount images.+ −
QList<QImage> images;+ −
for (int i = 0; i < imageCount; ++i)+ −
images.append(QImage(1600, 1200, QImage::Format_ARGB32_Premultiplied));+ −
+ −
// Use QtConcurrentBlocking::mapped to apply the scale function to all the+ −
// images in the list.+ −
QList<QImage> thumbnails = QtConcurrent::blockingMapped(images, scale);+ −
+ −
return 0;+ −
}+ −
+ −
#else+ −
+ −
int main()+ −
{+ −
qDebug() << "Qt Concurrent is not yet supported on this platform";+ −
}+ −
+ −
#endif+ −