text: /*
   * Copyright 1993-2007 NVIDIA Corporation.  All rights reserved.
   *
   * NOTICE TO USER:   
   *
   * This source code is subject to NVIDIA ownership rights under U.S. and 
   * international Copyright laws.  Users and possessors of this source code 
   * are hereby granted a nonexclusive, royalty-free license to use this code 
   * in individual and commercial software.
   *
   * NVIDIA MAKES NO REPRESENTATION ABOUT THE SUITABILITY OF THIS SOURCE 
   * CODE FOR ANY PURPOSE.  IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR 
   * IMPLIED WARRANTY OF ANY KIND.  NVIDIA DISCLAIMS ALL WARRANTIES WITH 
   * REGARD TO THIS SOURCE CODE, INCLUDING ALL IMPLIED WARRANTIES OF 
   * MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE.
   * IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, 
   * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS 
   * OF USE, DATA OR PROFITS,  WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 
   * OR OTHER TORTIOUS ACTION,  ARISING OUT OF OR IN CONNECTION WITH THE USE 
   * OR PERFORMANCE OF THIS SOURCE CODE.  
   *
   * U.S. Government End Users.   This source code is a "commercial item" as 
   * that term is defined at  48 C.F.R. 2.101 (OCT 1995), consisting  of 
   * "commercial computer  software"  and "commercial computer software 
   * documentation" as such terms are  used in 48 C.F.R. 12.212 (SEPT 1995) 
   * and is provided to the U.S. Government only as a commercial end item.  
   * Consistent with 48 C.F.R.12.212 and 48 C.F.R. 227.7202-1 through 
   * 227.7202-4 (JUNE 1995), all U.S. Government End Users acquire the 
   * source code with only those rights set forth herein. 
   *
   * Any use of this source code in individual and commercial software must 
   * include, in the user documentation and internal comments to the code,
   * the above Disclaimer and U.S. Government End Users Notice.
   */
  
  
  
  ////////////////////////////////////////////////////////////////////////////////
  // Reference row convolution filter
  ////////////////////////////////////////////////////////////////////////////////
  extern "C" void convolutionRowCPU(
      float *h_Result,
      float *h_Data,
      float *h_Kernel,
      int dataW,
      int dataH,
      int kernelR
  ){
      int x, y, k, d;
      float sum;
  
      for(y = 0; y < dataH; y++)
          for(x = 0; x < dataW; x++){
              sum = 0;
              for(k = -kernelR; k <= kernelR; k++){
                  d = x + k;
                  if(d < 0) d = 0;
                  if(d >= dataW) d= dataW - 1;
                  sum += h_Data[y * dataW + d] * h_Kernel[kernelR - k];
              }
              h_Result[y * dataW + x] = sum;
          }
  }
  
  
  
  ////////////////////////////////////////////////////////////////////////////////
  // Reference column convolution filter
  ////////////////////////////////////////////////////////////////////////////////
  extern "C" void convolutionColumnCPU(
      float *h_Result,
      float *h_Data,
      float *h_Kernel,
      int dataW,
      int dataH,
      int kernelR
  ){
      int x, y, k, d;
      float sum;
  
      for(y = 0; y < dataH; y++)
          for(x = 0; x < dataW; x++){
              sum = 0;
              for(k = -kernelR; k <= kernelR; k++){
                  d = y + k;
                  if(d < 0) d = 0;
                  if(d >= dataH) d = dataH - 1;
                  sum += h_Data[d * dataW + x] * h_Kernel[kernelR - k];
              }
              h_Result[y * dataW + x] = sum;
          }
  }
  