|
1 /**************************************************************************** |
|
2 ** |
|
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
|
4 ** All rights reserved. |
|
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
|
6 ** |
|
7 ** This file is part of the examples of the Qt Toolkit. |
|
8 ** |
|
9 ** $QT_BEGIN_LICENSE:LGPL$ |
|
10 ** No Commercial Usage |
|
11 ** This file contains pre-release code and may not be distributed. |
|
12 ** You may use this file in accordance with the terms and conditions |
|
13 ** contained in the Technology Preview License Agreement accompanying |
|
14 ** this package. |
|
15 ** |
|
16 ** GNU Lesser General Public License Usage |
|
17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
|
18 ** General Public License version 2.1 as published by the Free Software |
|
19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
|
20 ** packaging of this file. Please review the following information to |
|
21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
|
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
|
23 ** |
|
24 ** In addition, as a special exception, Nokia gives you certain additional |
|
25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
|
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
|
27 ** |
|
28 ** If you have questions regarding the use of this file, please contact |
|
29 ** Nokia at qt-info@nokia.com. |
|
30 ** |
|
31 ** |
|
32 ** |
|
33 ** |
|
34 ** |
|
35 ** |
|
36 ** |
|
37 ** |
|
38 ** $QT_END_LICENSE$ |
|
39 ** |
|
40 ****************************************************************************/ |
|
41 |
|
42 #include <QImage> |
|
43 #include <QList> |
|
44 #include <QThread> |
|
45 #include <QDebug> |
|
46 #include <QApplication> |
|
47 #include <qtconcurrentmap.h> |
|
48 |
|
49 #ifndef QT_NO_CONCURRENT |
|
50 |
|
51 QImage scale(const QImage &image) |
|
52 { |
|
53 qDebug() << "Scaling image in thread" << QThread::currentThread(); |
|
54 return image.scaled(QSize(100, 100), Qt::IgnoreAspectRatio, Qt::SmoothTransformation); |
|
55 } |
|
56 |
|
57 int main(int argc, char *argv[]) |
|
58 { |
|
59 QApplication app(argc, argv); |
|
60 |
|
61 const int imageCount = 20; |
|
62 |
|
63 // Create a list containing imageCount images. |
|
64 QList<QImage> images; |
|
65 for (int i = 0; i < imageCount; ++i) |
|
66 images.append(QImage(1600, 1200, QImage::Format_ARGB32_Premultiplied)); |
|
67 |
|
68 // Use QtConcurrentBlocking::mapped to apply the scale function to all the |
|
69 // images in the list. |
|
70 QList<QImage> thumbnails = QtConcurrent::blockingMapped(images, scale); |
|
71 |
|
72 return 0; |
|
73 } |
|
74 |
|
75 #else |
|
76 |
|
77 int main() |
|
78 { |
|
79 qDebug() << "Qt Concurrent is not yet supported on this platform"; |
|
80 } |
|
81 |
|
82 #endif |