Method RequestData

IO/Image/vtkNrrdReader.cxx:639–703

=============================================================================

//=============================================================================
int vtkNrrdReader::RequestData(
  vtkInformation* request, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  // Get rid of superclasses FileNames.  We don't support that functionality,
  // but we exploit that of the superclass.
  if (this->FileNames != nullptr)
  {
    this->FileNames->Delete();
    this->FileNames = nullptr;
  }

  char* saveFileName = this->FileName;

  if (this->DataFiles->GetNumberOfValues() == 1)
  {
    this->FileName = const_cast<char*>(this->DataFiles->GetValue(0).c_str());
  }
  else if (this->DataFiles->GetNumberOfValues() > 1)
  {
    this->FileNames = this->DataFiles;
  }

  int result;

  if (this->Encoding == ENCODING_RAW)
  {
    // Superclass knows how to read raw data.  Use that.

    result = this->Superclass::RequestData(request, inputVector, outputVector);
  }
  else if (this->Encoding == ENCODING_ASCII)
  {
    vtkImageData* outputData = vtkImageData::GetData(outputVector);
    this->AllocateOutputData(outputData, outputVector->GetInformationObject(0));
    if (outputData == nullptr)
    {
      vtkErrorMacro(<< "Data not created correctly?");
      return 0;
    }

    result = this->ReadDataAscii(outputData);
  }
  else if (this->Encoding == ENCODING_GZIP)
  {
    vtkImageData* outputData = vtkImageData::GetData(outputVector);
    this->AllocateOutputData(outputData, outputVector->GetInformationObject(0));
    if (outputData == nullptr)
    {
      vtkErrorMacro(<< "Data not created correctly?");
      return 0;
    }

    result = this->ReadDataGZip(outputData);
  }
  else
  {
    vtkErrorMacro(<< "Bad encoding set");
    result = 0;