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Diffstat (limited to 'examples/qtconcurrent/map/main.cpp')
-rw-r--r-- | examples/qtconcurrent/map/main.cpp | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/examples/qtconcurrent/map/main.cpp b/examples/qtconcurrent/map/main.cpp new file mode 100644 index 0000000000..bb6c5c657a --- /dev/null +++ b/examples/qtconcurrent/map/main.cpp @@ -0,0 +1,81 @@ +/**************************************************************************** +** +** 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 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 + +int main() +{ + qDebug() << "Qt Concurrent is not yet supported on this platform"; +} + +#endif |