include/FCam/Histogram.h

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#ifndef FCAM_HISTOGRAM_H
#define FCAM_HISTOGRAM_H

#include <vector>

namespace FCam {
    class HistogramConfig {         
      public:
        HistogramConfig() : buckets(64), enabled(false) {}
      
        Rect region;

        unsigned buckets;

        bool enabled;

        bool operator==(const HistogramConfig &other) const {
            if (enabled != other.enabled) return false;
            if (buckets != other.buckets) return false;
            if (region != other.region) return false;
            return true;
        }

        bool operator!=(const HistogramConfig &other) const {
            return !((*this) == other);
        }
    };


    class Histogram {
        unsigned _buckets, _channels;
        Rect _region;
        std::vector<unsigned> _data;

      public:

        Histogram(): _buckets(0), _channels(0), _region(0, 0, 0, 0) {
        }

        Histogram(unsigned buckets, unsigned channels, Rect region) :
            _buckets(buckets), _channels(channels), _region(region) {
            _data.resize(buckets*channels);
        }

        unsigned operator()(int b, int c) const {
            return _data[b*_channels + c];
        }

        unsigned &operator()(int b, int c) {
            return _data[b*_channels + c];
        }

        unsigned operator()(int b) const {
            unsigned result = 0;
            for (size_t c = 0; c < _channels; c++)
                result += (*this)(b, c);
            return result;
        }

        bool valid() const {
            return _data.size() != 0;
        }

        unsigned *data() {return &_data[0];}  

        unsigned buckets() const {return _buckets;}

        unsigned channels() const {return _channels;}

        Rect region() const {return _region;}
    };
   
}

#endif