opencv/modules/gpu/src/arithm.cpp

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#include "precomp.hpp"

using namespace cv;
using namespace cv::gpu;
using namespace std;

#if !defined (HAVE_CUDA)

void cv::gpu::add(const GpuMat& src1, const GpuMat& src2, GpuMat& dst) { throw_nogpu(); }

#else /* !defined (HAVE_CUDA) */

void cv::gpu::add(const GpuMat& src1, const GpuMat& src2, GpuMat& dst)
{
    dst.create( src1.size(), src1.type() );

    CV_Assert(src1.size() == src2.size() && src1.type() == src2.type());

    int nChannels = src1.channels();
    CV_DbgAssert((src1.depth() == CV_8U  && nChannels == 1 || nChannels == 4) || 
                 (src1.depth() == CV_32F && nChannels == 1));

    NppiSize sz;
    sz.width  = src1.cols;
    sz.height = src1.rows;

    if (src1.depth() == CV_8U)
    {
        if (nChannels == 1)
        {
            nppiAdd_8u_C1RSfs((const Npp8u*)src1.ptr<char>(), src1.step, 
                              (const Npp8u*)src2.ptr<char>(), src2.step, 
                              (Npp8u*)dst.ptr<char>(), dst.step, sz, 0);
        }
        else
        {
            nppiAdd_8u_C4RSfs((const Npp8u*)src1.ptr<char>(), src1.step, 
                              (const Npp8u*)src2.ptr<char>(), src2.step, 
                              (Npp8u*)dst.ptr<char>(), dst.step, sz, 0);
        }        
    }
    else //if (src1.depth() == CV_32F)
    {
        nppiAdd_32f_C1R((const Npp32f*)src1.ptr<float>(), src1.step,
                        (const Npp32f*)src2.ptr<float>(), src2.step,
                        (Npp32f*)dst.ptr<float>(), dst.step, sz);
    }
}

#endif /* !defined (HAVE_CUDA) */