mitkApplyDiffImageOperation.cpp

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/*=========================================================================

Program:   Medical Imaging & Interaction Toolkit
Language:  C++
Date:      $Date$
Version:   $Revision: 3056 $

Copyright (c) German Cancer Research Center, Division of Medical and
Biological Informatics. All rights reserved.
See MITKCopyright.txt or https://www.mitk.org/copyright.html for details.

This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.  See the above copyright notices for more information.

=========================================================================*/


#include "mitkApplyDiffImageOperation.h"

#include <itkCommand.h>

mitk::ApplyDiffImageOperation::ApplyDiffImageOperation(OperationType operationType, Image* image, Image* diffImage, unsigned int timeStep, unsigned int sliceDimension, unsigned int sliceIndex)
: Operation(operationType),
  m_Image( image ),
  m_SliceIndex( sliceIndex ),
  m_SliceDimension( sliceDimension ),
  m_TimeStep( timeStep ),
  m_Factor( 1.0 ),
  m_ImageStillValid( false ),
  m_DeleteTag( 0 )
{
  if (image && diffImage)
  {
    // observe 3D image for DeleteEvent
    m_ImageStillValid = true;

    itk::SimpleMemberCommand< ApplyDiffImageOperation >::Pointer command = itk::SimpleMemberCommand< ApplyDiffImageOperation >::New();
    command->SetCallbackFunction( this, &ApplyDiffImageOperation::OnImageDeleted );
    m_DeleteTag = image->AddObserver( itk::DeleteEvent(), command );

    // keep a compressed version of the image
    zlibContainer = CompressedImageContainer::New();
    zlibContainer->SetImage( diffImage );
  }
}

mitk::ApplyDiffImageOperation::~ApplyDiffImageOperation()
{
  if (m_ImageStillValid)
  {
    m_Image->RemoveObserver( m_DeleteTag );
  }
}

void mitk::ApplyDiffImageOperation::OnImageDeleted()
{
  m_ImageStillValid = false;
}

mitk::Image::ConstPointer mitk::ApplyDiffImageOperation::GetDiffImage()
{
  // uncompress image to create a valid mitk::Image
  Image::ConstPointer image = zlibContainer->GetImage().GetPointer();

  return image; 
}