root/modules/imgproc/src/opencl/blend_linear.cl

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DEFINITIONS

This source file includes following definitions.
  1. blendLinear

/*M///////////////////////////////////////////////////////////////////////////////////////
//
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//
//                           License Agreement
//                For Open Source Computer Vision Library
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// Copyright (C) 2010-2012, MulticoreWare Inc., all rights reserved.
// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// @Authors
//    Liu Liujun, liujun@multicorewareinc.com
//
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#ifdef DOUBLE_SUPPORT
#ifdef cl_amd_fp64
#pragma OPENCL EXTENSION cl_amd_fp64:enable
#elif defined (cl_khr_fp64)
#pragma OPENCL EXTENSION cl_khr_fp64:enable
#endif
#endif

#define noconvert

__kernel void blendLinear(__global const uchar * src1ptr, int src1_step, int src1_offset,
                          __global const uchar * src2ptr, int src2_step, int src2_offset,
                          __global const uchar * weight1, int weight1_step, int weight1_offset,
                          __global const uchar * weight2, int weight2_step, int weight2_offset,
                          __global uchar * dstptr, int dst_step, int dst_offset, int dst_rows, int dst_cols)
{
    int x = get_global_id(0);
    int y = get_global_id(1);

    if (x < dst_cols && y < dst_rows)
    {
        int src1_index = mad24(y, src1_step, src1_offset + x * cn * (int)sizeof(T));
        int src2_index = mad24(y, src2_step, src2_offset + x * cn * (int)sizeof(T));
        int weight1_index = mad24(y, weight1_step, weight1_offset + x * (int)sizeof(float));
        int weight2_index = mad24(y, weight2_step, weight2_offset + x * (int)sizeof(float));
        int dst_index = mad24(y, dst_step, dst_offset + x * cn * (int)sizeof(T));

        float w1 = *(__global const float *)(weight1 + weight1_index),
              w2 = *(__global const float *)(weight2 + weight2_index);
        float den = w1 + w2 + 1e-5f;

        __global const T * src1 = (__global const T *)(src1ptr + src1_index);
        __global const T * src2 = (__global const T *)(src2ptr + src2_index);
        __global T * dst = (__global T *)(dstptr + dst_index);

        #pragma unroll
        for (int i = 0; i < cn; ++i)
        {
            float num = w1 * convert_float(src1[i]) + w2 * convert_float(src2[i]);
            dst[i] = convertToT(num / den);
        }
    }
}

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