template<typename T> class RGBHistogramTrait
{
public:
    RGBHistogramTrait(const QImage &image, RGBHistogram<T> hist) : _hist(hist), _base((QRgb *) (image.bits()));
private:
    const QRgb *_base;
    RGBHistogram<T> _hist;
};

template<typename T> struct RGBHistogram
{
    RGBHistogram<T>(Histogram<T> &redHist, Histogram<T> &greenHist, Histogram<T> &blueHist)
        : redHist(redHist), greenHist(greenHist), blueHist(blueHist) {}

    Histogram<T> &redHist, &greenHist, &blueHist;
};

template<typename T> void ImageReader<T>::calculate(RGBHistogram<T> &hist)
{
    QImage image;

    if (image.load(QString::fromUtf8(_file.c_str())))
    {
        std::vector<RGBHistogramTrait<T> > *fs = new std::vector<RGBHistogramTrait<T> >[_threads];

        for (ThreadNum i = 0; i < _threads; i++)
        {
            fs->push_back(RGBHistogramTrait<T>(image, hist));
        }

        ThreadCoord::start(image.width() * image.height(), _threads, *fs);

        // Now aggregate the results in fs back into the original hist


        }