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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#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
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