1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/****************************************************************************
**
** 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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 1.1, 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
class MyWidget : public QWidget
{
public:
MyWidget(QWidget * parent, const QString &imagefname, bool scaleImage)
: QWidget(parent), fileName(imagefname), scale(scaleImage)
{
}
virtual void paintEvent(QPaintEvent * /*event*/)
{
QPainter painter(this);
QImageReader reader(fileName);
if (!reader.canRead()) {
qWarning("Unable to read image file %s", fileName.toLocal8Bit().constData());
return;
}
if (!scale){
QImage image = reader.read();
painter.drawImage(rect(), image);
}else{
reader.setScaledSize( QSize(rect().width(), rect().height()) );
QImage image = reader.read();
painter.drawImage(rect(), image);
}
}
private:
QString fileName;
bool scale;
};
// both the scaled and unscaled version of the CMYK encoded JPEG
// should have the same colors and not look corrupted.
int main(int argc, char** argv)
{
QApplication app(argc, argv);
QWidget mainWidget;
mainWidget.setWindowTitle("Colors in images are identical?");
mainWidget.setMinimumSize(400,400);
QHBoxLayout *l = new QHBoxLayout;
MyWidget *w1 = new MyWidget(&mainWidget,"Qt_logostrap_CMYK.jpg", false);
MyWidget *w2 = new MyWidget(&mainWidget,"Qt_logostrap_CMYK.jpg", true);
l->addWidget(w1);
l->addWidget(w2);
mainWidget.setLayout(l);
mainWidget.show();
return app.exec();
}
|
