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#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();

}