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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkLabelMapFilter.txx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
Portions of this code are covered under the VTK copyright.
See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.htm 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.
=========================================================================*/
#ifndef __itkLabelMapFilter_txx
#define __itkLabelMapFilter_txx
#include "itkLabelMapFilter.h"
#include "itkProgressReporter.h"
namespace itk
{
template <class TInputImage, class TOutputImage>
LabelMapFilter<TInputImage, TOutputImage>
::LabelMapFilter()
{
m_Progress = NULL;
}
template <class TInputImage, class TOutputImage>
LabelMapFilter<TInputImage, TOutputImage>
::~LabelMapFilter()
{
// be sure that the progress reporter has been destroyed
if( m_Progress != NULL )
{
delete m_Progress;
}
}
template <class TInputImage, class TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>
::GenerateInputRequestedRegion()
{
// call the superclass' implementation of this method
Superclass::GenerateInputRequestedRegion();
// We need all the input.
InputImagePointer input = const_cast<InputImageType *>(this->GetInput());
if ( !input )
{ return; }
input->SetRequestedRegion( input->GetLargestPossibleRegion() );
}
template <class TInputImage, class TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>
::EnlargeOutputRequestedRegion(DataObject *)
{
this->GetOutput()->SetRequestedRegion( this->GetOutput()->GetLargestPossibleRegion() );
}
template <class TInputImage, class TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>
::BeforeThreadedGenerateData()
{
// initialize the iterator
m_LabelObjectIterator = this->GetLabelMap()->GetLabelObjectContainer().begin();
// and the mutex
m_LabelObjectContainerLock = FastMutexLock::New();
// be sure that the previous progress reporter has been destroyed
if( m_Progress != NULL )
{
delete m_Progress;
}
// initialize the progress reporter
m_Progress = new ProgressReporter(this, 0, this->GetLabelMap()->GetNumberOfLabelObjects());
}
template <class TInputImage, class TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>
::AfterThreadedGenerateData()
{
// destroy progress reporter
delete m_Progress;
m_Progress = NULL;
}
template <class TInputImage, class TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>
::ThreadedGenerateData( const OutputImageRegionType&, int itkNotUsed(threadId) )
{
while( true )
{
// first lock the mutex
m_LabelObjectContainerLock->Lock();
if( m_LabelObjectIterator == this->GetLabelMap()->GetLabelObjectContainer().end() )
{
// no more objects. Release the lock and return
m_LabelObjectContainerLock->Unlock();
return;
}
// get the label object
LabelObjectType * labelObject = m_LabelObjectIterator->second;
// increment the iterator now, so it will not be invalidated if the object is destroyed
m_LabelObjectIterator++;
// pretend one more object is processed, even if it will be done later, to simplify the lock management
m_Progress->CompletedPixel();
// unlock the mutex, so the other threads can get an object
m_LabelObjectContainerLock->Unlock();
// and run the user defined method for that object
this->ThreadedProcessLabelObject( labelObject );
}
}
template <class TInputImage, class TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>
::ThreadedProcessLabelObject( LabelObjectType * itkNotUsed(labelObject) )
{
// do nothing
// the subclass should override this method
}
} // end namespace itk
#endif
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