Function vtkImageDataCastExecute

Common/DataModel/vtkImageData.cxx:1084–1120

// This templated function executes the filter for any type of data.
template <class IT, class OT>
void vtkImageDataCastExecute(
  vtkImageData* inData, IT* inPtr, vtkImageData* outData, OT* outPtr, int outExt[6])
{
  int idxR, idxY, idxZ;
  int maxY, maxZ;
  vtkIdType inIncX, inIncY, inIncZ;
  vtkIdType outIncX, outIncY, outIncZ;
  int rowLength;

  // find the region to loop over
  rowLength = (outExt[1] - outExt[0] + 1) * inData->GetNumberOfScalarComponents();
  maxY = outExt[3] - outExt[2];
  maxZ = outExt[5] - outExt[4];

  // Get increments to march through data
  inData->GetContinuousIncrements(outExt, inIncX, inIncY, inIncZ);
  outData->GetContinuousIncrements(outExt, outIncX, outIncY, outIncZ);

  // Loop through output pixels
  for (idxZ = 0; idxZ <= maxZ; idxZ++)
  {
    for (idxY = 0; idxY <= maxY; idxY++)
    {
      for (idxR = 0; idxR < rowLength; idxR++)
      {
        // Pixel operation
        *outPtr = static_cast<OT>(*inPtr);
        outPtr++;
        inPtr++;
      }
      outPtr += outIncY;
      inPtr += inIncY;
    }
    outPtr += outIncZ;
    inPtr += inIncZ;
  }
}

//------------------------------------------------------------------------------
template <class T>