otbFunctionToImageFilter.hxx

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/*
 * Copyright (C) 1999-2011 Insight Software Consortium
 * Copyright (C) 2005-2024 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef otbFunctionToImageFilter_hxx
#define otbFunctionToImageFilter_hxx
 
#include "otbFunctionToImageFilter.h"
#include "itkImageRegionConstIterator.h"
 
namespace otb
{
 
template <class TInputImage, class TOutputImage, class TFunction>
FunctionToImageFilter<TInputImage, TOutputImage, TFunction>::FunctionToImageFilter()
{
  this->InPlaceOff();
  m_PixelFunction = FunctionType::New();
  this->DynamicMultiThreadingOn();
}
 
// template<class TInputImage, class TOutputImage, class TFunction >
// void
// FunctionToImageFilter<TInputImage, TOutputImage, TFunction>
// ::SetInput( const TInputImage *image )
// {
//   // The ProcessObject is not const-correct so the const_cast is required here
//   SetNthInput( 0, const_cast<TInputImage *>( image ) );
// }
 
template <class TInputImage, class TOutputImage, class TFunction>
void FunctionToImageFilter<TInputImage, TOutputImage, TFunction>::BeforeThreadedGenerateData()
{
  InputImagePointer inputPtr = dynamic_cast<const TInputImage*>((itk::ProcessObject::GetInput(0)));
  if (inputPtr.IsNull())
  {
    itkExceptionMacro(<< "At least one input is missing."
                      << " Input is missing :" << inputPtr.GetPointer();)
  }
  m_PixelFunction->SetInputImage(inputPtr);
}
 
template <class TInputImage, class TOutputImage, class TFunction>
void FunctionToImageFilter<TInputImage, TOutputImage, TFunction>::DynamicThreadedGenerateData(const OutputImageRegionType& outputRegionForThread)
{
 
  // We use dynamic_cast since inputs are stored as DataObjects.
  InputImagePointer inputPtr = dynamic_cast<const TInputImage*>((itk::ProcessObject::GetInput(0)));
 
  OutputImagePointer outputPtr = this->GetOutput(0);
 
  itk::ImageRegionConstIterator<TInputImage> inputIt(inputPtr, outputRegionForThread);
  itk::ImageRegionIterator<TOutputImage>     outputIt(outputPtr, outputRegionForThread);
 
  inputIt.GoToBegin();
  outputIt.GoToBegin();
 
 
  while (!inputIt.IsAtEnd())
  {
    outputIt.Set(static_cast<OutputImagePixelType>(m_PixelFunction->EvaluateAtIndex(inputIt.GetIndex())));
    ++inputIt;
    ++outputIt;
  }
}
} // end namespace otb
 
#endif