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/****************************************************************************
**
** Copyright (C) 2012 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.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/
#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
#include <QLabel>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QString text("Qt Concurrent is not yet supported on this platform");
QLabel *label = new QLabel(text);
label->setWordWrap(true);
#if defined(Q_WS_S60) || defined(Q_WS_MAEMO_5)
label->showMaximized();
#else
label->show();
#endif
qDebug() << text;
app.exec();
}
#endif
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