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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 itkLabelMapFilter_hxx
#define itkLabelMapFilter_hxx
#include "itkLabelMapFilter.h"
#include "itkMutexLockHolder.h"
namespace itk
{
template< typename TInputImage, typename TOutputImage >
LabelMapFilter< TInputImage, TOutputImage >
::LabelMapFilter():
m_InverseNumberOfLabelObjects( 1.0f ),
m_NumberOfLabelObjectsProcessed( 1 )
{
}
template< typename TInputImage, typename TOutputImage >
LabelMapFilter< TInputImage, TOutputImage >
::~LabelMapFilter()
{
}
template< typename TInputImage, typename 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< typename TInputImage, typename TOutputImage >
void
LabelMapFilter< TInputImage, TOutputImage >
::EnlargeOutputRequestedRegion(DataObject *)
{
this->GetOutput()->SetRequestedRegion( this->GetOutput()->GetLargestPossibleRegion() );
}
template< typename TInputImage, typename TOutputImage >
void
LabelMapFilter< TInputImage, TOutputImage >
::BeforeThreadedGenerateData()
{
// initialize the iterator
m_LabelObjectIterator = typename InputImageType::Iterator(this->GetLabelMap());
// m_LabelObjectIterator = typename InputImageType::Iterator(this->GetLabelMap());
// and the mutex
m_LabelObjectContainerLock = FastMutexLock::New();
if(Math::ExactlyEquals(this->GetLabelMap()->GetNumberOfLabelObjects(), 0.0))
{
m_InverseNumberOfLabelObjects = NumericTraits<float>::max();
}
else
{
m_InverseNumberOfLabelObjects = 1.0f/this->GetLabelMap()->GetNumberOfLabelObjects();
}
m_NumberOfLabelObjectsProcessed = 0;
}
template< typename TInputImage, typename TOutputImage >
void
LabelMapFilter< TInputImage, TOutputImage >
::AfterThreadedGenerateData()
{
this->UpdateProgress(1.0);
}
template< typename TInputImage, typename TOutputImage >
void
LabelMapFilter< TInputImage, TOutputImage >
::ThreadedGenerateData( const OutputImageRegionType &, ThreadIdType threadId )
{
while ( true )
{
LabelObjectType *labelObject;
// begin mutex lock
{
MutexLockHolder< FastMutexLock > lock(*m_LabelObjectContainerLock );
if ( m_LabelObjectIterator.IsAtEnd() )
{
// mutex lock holder deleted
return;
}
// get the label object
labelObject = m_LabelObjectIterator.GetLabelObject();
// increment the iterator now, so it will not be invalidated if the object
// is destroyed
++m_LabelObjectIterator;
++m_NumberOfLabelObjectsProcessed;
// unlock the mutex, so the other threads can get an object
}
// end mutex lock
// and run the user defined method for that object
this->ThreadedProcessLabelObject(labelObject);
if (threadId==0)
{
const float progress = m_InverseNumberOfLabelObjects*m_NumberOfLabelObjectsProcessed;
this->UpdateProgress(progress);
}
// all threads needs to check the abort flag
if ( this->GetAbortGenerateData() )
{
std::string msg;
ProcessAborted e(__FILE__, __LINE__);
msg += "Object " + std::string(this->GetNameOfClass() ) + ": AbortGenerateDataOn";
e.SetDescription(msg);
throw e;
}
}
}
template< typename TInputImage, typename 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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