passthrough.c

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static void passthrough_monochrome(float *out, const float *const in, dt_iop_roi_t *const roi_out,
                                   const dt_iop_roi_t *const roi_in)
{
  // we never want to access the input out of bounds though:
  assert(roi_in->width >= roi_out->width);
  assert(roi_in->height >= roi_out->height);
 
#ifdef _OPENMP
#pragma omp parallel for default(none) \
  dt_omp_firstprivate(in, roi_out, roi_in) \
  shared(out) \
  schedule(static) collapse(2)
#endif
  for(int j = 0; j < roi_out->height; j++)
  {
    for(int i = 0; i < roi_out->width; i++)
    {
      for(int c = 0; c < 3; c++)
      {
        out[(size_t)4 * ((size_t)j * roi_out->width + i) + c]
            = in[(size_t)((size_t)j + roi_out->y) * roi_in->width + i + roi_out->x];
      }
    }
  }
}
 
static void passthrough_color(float *out, const float *const in, dt_iop_roi_t *const roi_out, const dt_iop_roi_t *const roi_in,
   const uint32_t filters, const uint8_t (*const xtrans)[6])
{
  assert(roi_in->width >= roi_out->width);
  assert(roi_in->height >= roi_out->height);
 
 
  if(filters != 9u)
  {
    #ifdef _OPENMP
      #pragma omp parallel for default(none) \
      dt_omp_firstprivate(in, roi_out, roi_in, filters) \
      shared(out) \
      schedule(static) \
      collapse(2)
    #endif
 
    for(int row = 0; row < (roi_out->height); row++)
    {
      for(int col = 0; col < (roi_out->width); col++)
      {
        const float val = in[col + roi_out->x + ((row + roi_out->y) * roi_in->width)];
        const uint32_t offset = (size_t)4 * ((size_t)row * roi_out->width + col);
        const uint32_t ch = FC(row + roi_out->y, col + roi_out->x, filters);
 
        out[offset] = out[offset + 1] = out[offset + 2] = 0.0f;
        out[offset + ch] = val;
      }
    }
  }
  else
  {
    #ifdef _OPENMP
      #pragma omp parallel for default(none) \
      dt_omp_firstprivate(in, roi_out, roi_in, xtrans) \
      shared(out) \
      schedule(static) \
      collapse(2)
    #endif
 
    for(int row = 0; row < (roi_out->height); row++)
    {
      for(int col = 0; col < (roi_out->width); col++)
      {
        const float val = in[col + roi_out->x + ((row + roi_out->y) * roi_in->width)];
        const uint32_t offset = (size_t)4 * ((size_t)row * roi_out->width + col);
        const uint32_t ch = FCxtrans(row, col, roi_in, xtrans);
 
        out[offset] = out[offset + 1] = out[offset + 2] = 0.0f;
        out[offset + ch] = val;
      }
    }
  }
}
 
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