QImage to cv::mat

目的

QImage to cv::mat
狠话不多 直接上代码

cv::Mat LogoSettingCell::QImageToCvMat(const QImage &inImage, bool inCloneImageData )
{
#if 0
    cv::Mat mat;
    QImage img = inImage;
    QImage2cvMat2(img, mat);
    return (inCloneImageData ? mat.clone() : mat);
#else
    switch ( inImage.format() )
    {
    // 8-bit, 4 channel
    case QImage::Format_ARGB32:
    case QImage::Format_ARGB32_Premultiplied:
    {
        cv::Mat  mat( inImage.height(), inImage.width(),
                      CV_8UC4,
                      const_cast<uchar*>(inImage.bits()),
                      static_cast<size_t>(inImage.bytesPerLine())
                      );

        return (inCloneImageData ? mat.clone() : mat);
    }

    // 8-bit, 3 channel
    case QImage::Format_RGB32:
    case QImage::Format_RGB888:
    {
        if ( !inCloneImageData )
        {
            qWarning() << "CVS::QImageToCvMat() - Conversion requires cloning because we use a temporary QImage";
        }

        QImage   swapped = inImage;

        if ( inImage.format() == QImage::Format_RGB32 )
        {
            swapped = swapped.convertToFormat( QImage::Format_RGB888 );
        }

        swapped = swapped.rgbSwapped();

        return cv::Mat( swapped.height(), swapped.width(),
                        CV_8UC3,
                        const_cast<uchar*>(swapped.bits()),
                        static_cast<size_t>(swapped.bytesPerLine())
                        ).clone();
    }

    // 8-bit, 1 channel
    case QImage::Format_Indexed8:
    {
        cv::Mat  mat( inImage.height(), inImage.width(),
                      CV_8UC1,
                      const_cast<uchar*>(inImage.bits()),
                      static_cast<size_t>(inImage.bytesPerLine())
                      );

        return (inCloneImageData ? mat.clone() : mat);
    }
/*
    default:
        qWarning() << "CVS::QImageToCvMat() - QImage format not handled in switch:" << inImage.format();
        break;
        */
    }
    return cv::Mat();
#endif
}