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#pragma once

#ifndef __OPENCV_CUDEV_PTR2D_MASK_HPP__
#define __OPENCV_CUDEV_PTR2D_MASK_HPP__

#include "../common.hpp"
#include "traits.hpp"

namespace cv { namespace cudev {

//! @addtogroup cudev
//! @{

struct WithOutMask
{
    typedef bool value_type;
    typedef int  index_type;

    __device__ __forceinline__ bool operator ()(int, int) const
    {
        return true;
    }
};

template <class MaskPtr> struct SingleMaskChannels
{
    typedef typename PtrTraits<MaskPtr>::value_type value_type;
    typedef typename PtrTraits<MaskPtr>::index_type index_type;

    MaskPtr mask;
    int channels;

    __device__ __forceinline__ value_type operator()(index_type y, index_type x) const
    {
        return mask(y, x / channels);
    }

};

template <class MaskPtr> struct SingleMaskChannelsSz : SingleMaskChannels<MaskPtr>
{
    int rows, cols;
};

template <class MaskPtr>
__host__ SingleMaskChannelsSz<typename PtrTraits<MaskPtr>::ptr_type>
singleMaskChannels(const MaskPtr& mask, int channels)
{
    SingleMaskChannelsSz<typename PtrTraits<MaskPtr>::ptr_type> ptr;
    ptr.mask = shrinkPtr(mask);
    ptr.channels = channels;
    ptr.rows = getRows(mask);
    ptr.cols = getCols(mask) * channels;
    return ptr;
}

template <class MaskPtr> struct PtrTraits< SingleMaskChannelsSz<MaskPtr> > : PtrTraitsBase<SingleMaskChannelsSz<MaskPtr>, SingleMaskChannels<MaskPtr> >
{
};

//! @}

}}

#endif