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  #pragma once
  
  #ifndef __OPENCV_CUDEV_PTR2D_ZIP_HPP__
  #define __OPENCV_CUDEV_PTR2D_ZIP_HPP__
  
  #include "../common.hpp"
  #include "../util/tuple.hpp"
  #include "traits.hpp"
  
  namespace cv { namespace cudev {
  
  template <class PtrTuple> struct ZipPtr;
  
  template <class Ptr0, class Ptr1> struct ZipPtr< tuple<Ptr0, Ptr1> > : tuple<Ptr0, Ptr1>
  {
      typedef tuple<typename PtrTraits<Ptr0>::value_type,
                    typename PtrTraits<Ptr1>::value_type> value_type;
      typedef typename PtrTraits<Ptr0>::index_type        index_type;
  
      __host__ __device__ __forceinline__ ZipPtr() {}
      __host__ __device__ __forceinline__ ZipPtr(const tuple<Ptr0, Ptr1>& t) : tuple<Ptr0, Ptr1>(t) {}
  
      __device__ __forceinline__ value_type operator ()(index_type y, index_type x) const
      {
          return make_tuple(cv::cudev::get<0>(*this)(y, x), cv::cudev::get<1>(*this)(y, x));
      }
  };
  
  template <class Ptr0, class Ptr1, class Ptr2> struct ZipPtr< tuple<Ptr0, Ptr1, Ptr2> > : tuple<Ptr0, Ptr1, Ptr2>
  {
      typedef tuple<typename PtrTraits<Ptr0>::value_type,
                    typename PtrTraits<Ptr1>::value_type,
                    typename PtrTraits<Ptr2>::value_type> value_type;
      typedef typename PtrTraits<Ptr0>::index_type        index_type;
  
      __host__ __device__ __forceinline__ ZipPtr() {}
      __host__ __device__ __forceinline__ ZipPtr(const tuple<Ptr0, Ptr1, Ptr2>& t) : tuple<Ptr0, Ptr1, Ptr2>(t) {}
  
      __device__ __forceinline__ value_type operator ()(index_type y, index_type x) const
      {
          return make_tuple(cv::cudev::get<0>(*this)(y, x), cv::cudev::get<1>(*this)(y, x), cv::cudev::get<2>(*this)(y, x));
      }
  };
  
  template <class Ptr0, class Ptr1, class Ptr2, class Ptr3> struct ZipPtr< tuple<Ptr0, Ptr1, Ptr2, Ptr3> > : tuple<Ptr0, Ptr1, Ptr2, Ptr3>
  {
      typedef tuple<typename PtrTraits<Ptr0>::value_type,
                    typename PtrTraits<Ptr1>::value_type,
                    typename PtrTraits<Ptr2>::value_type,
                    typename PtrTraits<Ptr3>::value_type> value_type;
      typedef typename PtrTraits<Ptr0>::index_type        index_type;
  
      __host__ __device__ __forceinline__ ZipPtr() {}
      __host__ __device__ __forceinline__ ZipPtr(const tuple<Ptr0, Ptr1, Ptr2, Ptr3>& t) : tuple<Ptr0, Ptr1, Ptr2, Ptr3>(t) {}
  
      __device__ __forceinline__ value_type operator ()(index_type y, index_type x) const
      {
          return make_tuple(cv::cudev::get<0>(*this)(y, x), cv::cudev::get<1>(*this)(y, x), cv::cudev::get<2>(*this)(y, x), cv::cudev::get<3>(*this)(y, x));
      }
  };
  
  template <class PtrTuple> struct ZipPtrSz : ZipPtr<PtrTuple>
  {
      int rows, cols;
  
      __host__ __device__ __forceinline__ ZipPtrSz() {}
      __host__ __device__ __forceinline__ ZipPtrSz(const PtrTuple& t) : ZipPtr<PtrTuple>(t) {}
  };
  
  template <class Ptr0, class Ptr1>
  __host__ ZipPtrSz< tuple<typename PtrTraits<Ptr0>::ptr_type, typename PtrTraits<Ptr1>::ptr_type> >
  zipPtr(const Ptr0& ptr0, const Ptr1& ptr1)
  {
      const int rows = getRows(ptr0);
      const int cols = getCols(ptr0);
  
      CV_Assert( getRows(ptr1) == rows && getCols(ptr1) == cols );
  
      ZipPtrSz< tuple<typename PtrTraits<Ptr0>::ptr_type, typename PtrTraits<Ptr1>::ptr_type> >
              z(make_tuple(shrinkPtr(ptr0), shrinkPtr(ptr1)));
      z.rows = rows;
      z.cols = cols;
  
      return z;
  }
  
  template <class Ptr0, class Ptr1, class Ptr2>
  __host__ ZipPtrSz< tuple<typename PtrTraits<Ptr0>::ptr_type, typename PtrTraits<Ptr1>::ptr_type, typename PtrTraits<Ptr2>::ptr_type> >
  zipPtr(const Ptr0& ptr0, const Ptr1& ptr1, const Ptr2& ptr2)
  {
      const int rows = getRows(ptr0);
      const int cols = getCols(ptr0);
  
      CV_Assert( getRows(ptr1) == rows && getCols(ptr1) == cols );
      CV_Assert( getRows(ptr2) == rows && getCols(ptr2) == cols );
  
      ZipPtrSz< tuple<typename PtrTraits<Ptr0>::ptr_type, typename PtrTraits<Ptr1>::ptr_type, typename PtrTraits<Ptr2>::ptr_type> >
              z(make_tuple(shrinkPtr(ptr0), shrinkPtr(ptr1), shrinkPtr(ptr2)));
      z.rows = rows;
      z.cols = cols;
  
      return z;
  }
  
  template <class Ptr0, class Ptr1, class Ptr2, class Ptr3>
  __host__ ZipPtrSz< tuple<typename PtrTraits<Ptr0>::ptr_type, typename PtrTraits<Ptr1>::ptr_type, typename PtrTraits<Ptr2>::ptr_type, typename PtrTraits<Ptr3>::ptr_type> >
  zipPtr(const Ptr0& ptr0, const Ptr1& ptr1, const Ptr2& ptr2, const Ptr3& ptr3)
  {
      const int rows = getRows(ptr0);
      const int cols = getCols(ptr0);
  
      CV_Assert( getRows(ptr1) == rows && getCols(ptr1) == cols );
      CV_Assert( getRows(ptr2) == rows && getCols(ptr2) == cols );
      CV_Assert( getRows(ptr3) == rows && getCols(ptr3) == cols );
  
      ZipPtrSz< tuple<typename PtrTraits<Ptr0>::ptr_type, typename PtrTraits<Ptr1>::ptr_type, typename PtrTraits<Ptr2>::ptr_type, typename PtrTraits<Ptr3>::ptr_type> >
              z(make_tuple(shrinkPtr(ptr0), shrinkPtr(ptr1), shrinkPtr(ptr2), shrinkPtr(ptr3)));
      z.rows = rows;
      z.cols = cols;
  
      return z;
  }
  
  template <class PtrTuple> struct PtrTraits< ZipPtrSz<PtrTuple> > : PtrTraitsBase<ZipPtrSz<PtrTuple>, ZipPtr<PtrTuple> >
  {
  };
  
  }}
  
  #endif
  