itkInPlaceImageFilter.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  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.txt
 *
 *  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.
 *
 *=========================================================================*/
/*=========================================================================
 *
 *  Portions of this file are subject to the VTK Toolkit Version 3 copyright.
 *
 *  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
 *
 *  For complete copyright, license and disclaimer of warranty information
 *  please refer to the NOTICE file at the top of the ITK source tree.
 *
 *=========================================================================*/
#ifndef __itkInPlaceImageFilter_h
#define __itkInPlaceImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkIsSame.h"

namespace itk
{
template< typename TInputImage, typename TOutputImage = TInputImage >
class InPlaceImageFilter:public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
  typedef InPlaceImageFilter                              Self;
  typedef ImageToImageFilter< TInputImage, TOutputImage > Superclass;
  typedef SmartPointer< Self >                            Pointer;
  typedef SmartPointer< const Self >                      ConstPointer;

  itkTypeMacro(InPlaceImageFilter, ImageToImageFilter);

  typedef typename Superclass::OutputImageType       OutputImageType;
  typedef typename Superclass::OutputImagePointer    OutputImagePointer;
  typedef typename Superclass::OutputImageRegionType OutputImageRegionType;
  typedef typename Superclass::OutputImagePixelType  OutputImagePixelType;

  typedef TInputImage                           InputImageType;
  typedef typename InputImageType::Pointer      InputImagePointer;
  typedef typename InputImageType::ConstPointer InputImageConstPointer;
  typedef typename InputImageType::RegionType   InputImageRegionType;
  typedef typename InputImageType::PixelType    InputImagePixelType;

  itkStaticConstMacro(InputImageDimension, unsigned int,
                      TInputImage::ImageDimension);
  itkStaticConstMacro(OutputImageDimension, unsigned int,
                      TOutputImage::ImageDimension);

  itkSetMacro(InPlace, bool);
  itkGetConstMacro(InPlace, bool);
  itkBooleanMacro(InPlace);

  virtual bool CanRunInPlace() const;

protected:
  InPlaceImageFilter();
  ~InPlaceImageFilter();

  virtual void PrintSelf(std::ostream & os, Indent indent) const;

  virtual void AllocateOutputs()
  {
    this->InternalAllocateOutputs(IsSame<TInputImage, TOutputImage>());
  }

  virtual void ReleaseInputs();

  itkGetConstMacro(RunningInPlace,bool);

private:
  InPlaceImageFilter(const Self &); //purposely not implemented
  void operator=(const Self &);     //purposely not implemented

  // the type are different we can't run in place
  void InternalAllocateOutputs( const FalseType& )
  {
    this->m_RunningInPlace = false;
    this->Superclass::AllocateOutputs();
  }

  void InternalAllocateOutputs( const TrueType& );

  bool m_InPlace; // enable the possibility of in-place
  bool m_RunningInPlace;

};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkInPlaceImageFilter.hxx"
#endif

#endif