05fc3aef53
Replace the current license disclaimer in files by a SPDX-License-Identifier. Files that have to be modified by hand are modified. License files are organized under LICENSES directory. Task-number: QTBUG-67283 Change-Id: Id880c92784c40f3bbde861c0d93f58151c18b9f1 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Lars Knoll <lars.knoll@qt.io> Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
36 lines
1.0 KiB
C++
36 lines
1.0 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include <QImage>
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#include <QList>
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#include <QThread>
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#include <QDebug>
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#include <QGuiApplication>
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#include <qtconcurrentmap.h>
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#include <functional>
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int main(int argc, char *argv[])
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{
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QGuiApplication app(argc, argv);
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const int imageCount = 20;
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// Create a list containing imageCount images.
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QList<QImage> images;
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for (int i = 0; i < imageCount; ++i)
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images.append(QImage(1600, 1200, QImage::Format_ARGB32_Premultiplied));
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std::function<QImage(const QImage&)> scale = [](const QImage &image) -> QImage
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{
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qDebug() << "Scaling image in thread" << QThread::currentThread();
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return image.scaled(QSize(100, 100), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
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};
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// Use QtConcurrentBlocking::mapped to apply the scale function to all the
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// images in the list.
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QList<QImage> thumbnails = QtConcurrent::blockingMapped(images, scale);
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return 0;
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}
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