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#include "internal_shared.hpp"
#include "opencv2/gpu/device/border_interpolate.hpp"

namespace cv { namespace gpu { namespace device
{
    namespace imgproc
    {
        template <typename Ptr2D, typename T> __global__ void copyMakeBorder(const Ptr2D src, DevMem2D_<T> dst, int top, int left)
        {
            const int x = blockDim.x * blockIdx.x + threadIdx.x;
            const int y = blockDim.y * blockIdx.y + threadIdx.y;

            if (x < dst.cols && y < dst.rows)
                dst.ptr(y)[x] = src(y - top, x - left);
        }

        template <template <typename> class B, typename T> struct CopyMakeBorderDispatcher
        {
            static void call(const DevMem2D_<T>& src, const DevMem2D_<T>& dst, int top, int left,
                const typename VecTraits<T>::elem_type* borderValue, cudaStream_t stream)
            {
                dim3 block(32, 8);
                dim3 grid(divUp(dst.cols, block.x), divUp(dst.rows, block.y));

                B<T> brd(src.rows, src.cols, VecTraits<T>::make(borderValue));
                BorderReader< PtrStep<T>, B<T> > brdSrc(src, brd);

                copyMakeBorder<<<grid, block, 0, stream>>>(brdSrc, dst, top, left);
                cudaSafeCall( cudaGetLastError() );

                if (stream == 0)
                    cudaSafeCall( cudaDeviceSynchronize() );
            }
        };

        template <typename T, int cn> void copyMakeBorder_gpu(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode,
            const T* borderValue, cudaStream_t stream)
        {
            typedef typename TypeVec<T, cn>::vec_type vec_type;

            typedef void (*caller_t)(const DevMem2D_<vec_type>& src, const DevMem2D_<vec_type>& dst, int top, int left, const T* borderValue, cudaStream_t stream);

            static const caller_t callers[5] =
            {
                CopyMakeBorderDispatcher<BrdReflect101, vec_type>::call,
                CopyMakeBorderDispatcher<BrdReplicate, vec_type>::call,
                CopyMakeBorderDispatcher<BrdConstant, vec_type>::call,
                CopyMakeBorderDispatcher<BrdReflect, vec_type>::call,
                CopyMakeBorderDispatcher<BrdWrap, vec_type>::call
            };

            callers[borderMode](DevMem2D_<vec_type>(src), DevMem2D_<vec_type>(dst), top, left, borderValue, stream);
        }

        template void copyMakeBorder_gpu<uchar, 1>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const uchar* borderValue, cudaStream_t stream);
        //template void copyMakeBorder_gpu<uchar, 2>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const uchar* borderValue, cudaStream_t stream);
        template void copyMakeBorder_gpu<uchar, 3>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const uchar* borderValue, cudaStream_t stream);
        template void copyMakeBorder_gpu<uchar, 4>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const uchar* borderValue, cudaStream_t stream);

        //template void copyMakeBorder_gpu<schar, 1>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const schar* borderValue, cudaStream_t stream);
        //template void copyMakeBorder_gpu<schar, 2>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const schar* borderValue, cudaStream_t stream);
        //template void copyMakeBorder_gpu<schar, 3>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const schar* borderValue, cudaStream_t stream);
        //template void copyMakeBorder_gpu<schar, 4>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const schar* borderValue, cudaStream_t stream);

        template void copyMakeBorder_gpu<ushort, 1>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const ushort* borderValue, cudaStream_t stream);
        //template void copyMakeBorder_gpu<ushort, 2>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const ushort* borderValue, cudaStream_t stream);
        template void copyMakeBorder_gpu<ushort, 3>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const ushort* borderValue, cudaStream_t stream);
        template void copyMakeBorder_gpu<ushort, 4>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const ushort* borderValue, cudaStream_t stream);

        template void copyMakeBorder_gpu<short, 1>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const short* borderValue, cudaStream_t stream);
        //template void copyMakeBorder_gpu<short, 2>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const short* borderValue, cudaStream_t stream);
        template void copyMakeBorder_gpu<short, 3>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const short* borderValue, cudaStream_t stream);
        template void copyMakeBorder_gpu<short, 4>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const short* borderValue, cudaStream_t stream);

        //template void copyMakeBorder_gpu<int, 1>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const int* borderValue, cudaStream_t stream);
        //template void copyMakeBorder_gpu<int, 2>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const int* borderValue, cudaStream_t stream);
        //template void copyMakeBorder_gpu<int, 3>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const int* borderValue, cudaStream_t stream);
        //template void copyMakeBorder_gpu<int, 4>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const int* borderValue, cudaStream_t stream);

        template void copyMakeBorder_gpu<float, 1>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const float* borderValue, cudaStream_t stream);
        //template void copyMakeBorder_gpu<float, 2>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const float* borderValue, cudaStream_t stream);
        template void copyMakeBorder_gpu<float, 3>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const float* borderValue, cudaStream_t stream);
        template void copyMakeBorder_gpu<float, 4>(const DevMem2Db& src, const DevMem2Db& dst, int top, int left, int borderMode, const float* borderValue, cudaStream_t stream);
    } // namespace imgproc
}}} // namespace cv { namespace gpu { namespace device
