#include <iostream>

#include <QImage>
#include <QDir>

inline std::ostream&
operator<<(
    std::ostream &s,
    const QImage::Format &_format)
{
    switch (_format) {
        case QImage::Format_RGB32:
            return (s << "Format_RGB32");
        case QImage::Format_RGB888:
            return (s << "Format_RGB888");
        case QImage::Format_Grayscale8:
            return (s << "Format_Grayscale8");
        default:
            return (s << _format);
    }
}

int main(int argc, char *argv[])
{
    QDir dir("C:/Testdata/QImageissue");

    QStringList filters;
    filters << "*.jpg" << "*.png";

    QStringList files = dir.entryList(filters,QDir::Files | QDir::NoDotAndDotDot);

    QImage _qimg, _tmpqimg;
    for(int i = 0; i < files.size(); ++i) {

        std::cout << i << ") " << files.at(i).toStdString() << std::endl;
        _qimg.load(dir.absoluteFilePath(files.at(i)));
        std::cout << "\tOriginal format:\t" << _qimg.format() << "\tDepth: " << _qimg.depth() << " bits" <<  std::endl;

        std::cout << "\tOriginal width:\t" << _qimg.width() << "\n\tOriginal height:\t" << _qimg.height() << std::endl;
        std::cout << "\tOriginal byteCount():\t" << _qimg.byteCount()
                  << "\n\tOriginal width() x height() x depth()/8:\t" << _qimg.width() * _qimg.height() * _qimg.depth()/8
                  << "\n\tOriginal extra bytes (diff between two above): " << _qimg.byteCount() - _qimg.width() * _qimg.height() * _qimg.depth()/8 << std::endl << std::endl;

        if(_qimg.format() == QImage::Format_RGB888) {
            _tmpqimg = _qimg;
        } else {
            _tmpqimg = std::move(_qimg.convertToFormat(QImage::Format_RGB888));
            std::cout << "\tConverted to format:\t" << _tmpqimg.format() << "\tDepth: " << _tmpqimg.depth() << " bits" <<  std::endl;
        }

        std::cout << "\tWidth:\t" << _tmpqimg.width() << "\n\tHeight:\t" << _tmpqimg.height() << std::endl;
        std::cout << "\tbyteCount():\t" << _tmpqimg.byteCount()
                  << "\n\twidth() x height() x depth()/8:\t" << _tmpqimg.width() * _tmpqimg.height() * _tmpqimg.depth()/8
                  << "\n\tExtra bytes (diff between two above): " << _tmpqimg.byteCount() - _tmpqimg.width() * _tmpqimg.height() * _tmpqimg.depth()/8 << std::endl << std::endl;
    }

    return 0;
}