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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.
*
*=========================================================================*/
#ifndef itkPadImageFilterBase_hxx
#define itkPadImageFilterBase_hxx
#include "itkPadImageFilterBase.h"
#include "itkImageAlgorithm.h"
#include "itkImageRegionExclusionIteratorWithIndex.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkObjectFactory.h"
#include "itkProgressReporter.h"
namespace itk
{
template< typename TInputImage, typename TOutputImage >
PadImageFilterBase< TInputImage, TOutputImage >
::PadImageFilterBase()
{
m_BoundaryCondition = ITK_NULLPTR;
}
template< typename TInputImage, typename TOutputImage >
void
PadImageFilterBase< TInputImage, TOutputImage >
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
if ( m_BoundaryCondition )
{
m_BoundaryCondition->Print( os, indent );
}
else
{
os << "ITK_NULLPTR" << std::endl;
}
}
template< typename TInputImage, typename TOutputImage >
void
PadImageFilterBase< TInputImage, TOutputImage >
::GenerateInputRequestedRegion()
{
// Get pointers to the input and output.
typename Superclass::InputImagePointer inputPtr =
const_cast< TInputImage * >( this->GetInput() );
typename Superclass::OutputImagePointer outputPtr = this->GetOutput();
const InputImageRegionType & inputLargestPossibleRegion =
inputPtr->GetLargestPossibleRegion();
const OutputImageRegionType & outputRequestedRegion =
outputPtr->GetRequestedRegion();
// Ask the boundary condition for the input requested region.
if ( !m_BoundaryCondition )
{
itkExceptionMacro( << "Boundary condition is ITK_NULLPTR so no request region can be generated.");
}
InputImageRegionType inputRequestedRegion =
m_BoundaryCondition->GetInputRequestedRegion( inputLargestPossibleRegion,
outputRequestedRegion );
inputPtr->SetRequestedRegion( inputRequestedRegion );
}
template< typename TInputImage, typename TOutputImage >
void
PadImageFilterBase< TInputImage, TOutputImage >
::ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread,
ThreadIdType threadId)
{
typename Superclass::OutputImagePointer outputPtr = this->GetOutput();
typename Superclass::InputImageConstPointer inputPtr = this->GetInput();
// Use the region copy method to copy the input image values to the
// output image.
OutputImageRegionType copyRegion( outputRegionForThread );
bool regionOverlaps = copyRegion.Crop( inputPtr->GetLargestPossibleRegion() );
if ( regionOverlaps )
{
// Do a block copy for the overlapping region.
ImageAlgorithm::Copy( inputPtr.GetPointer(), outputPtr.GetPointer(), copyRegion, copyRegion );
// Use the boundary condition for pixels outside the input image region.
typename OutputImageSizeType::SizeValueType numberOfPixels =
outputRegionForThread.GetNumberOfPixels() - copyRegion.GetNumberOfPixels();
ProgressReporter progress( this, threadId, numberOfPixels );
ImageRegionExclusionIteratorWithIndex< TOutputImage > outIter( outputPtr,
outputRegionForThread );
outIter.SetExclusionRegion( copyRegion );
outIter.GoToBegin();
while ( !outIter.IsAtEnd() )
{
OutputImagePixelType value = static_cast< OutputImagePixelType >
( m_BoundaryCondition->GetPixel( outIter.GetIndex(), inputPtr ) );
outIter.Set( value );
++outIter;
progress.CompletedPixel();
}
}
else
{
// There is no overlap. Appeal to the boundary condition for every pixel.
ProgressReporter progress( this, threadId, outputRegionForThread.GetNumberOfPixels() );
ImageRegionIteratorWithIndex< TOutputImage > outIter( outputPtr,
outputRegionForThread );
outIter.GoToBegin();
while ( !outIter.IsAtEnd() )
{
OutputImagePixelType value = static_cast< OutputImagePixelType >
( m_BoundaryCondition->GetPixel( outIter.GetIndex(), inputPtr ) );
outIter.Set( value );
++outIter;
progress.CompletedPixel();
}
}
}
template< typename TInputImage, typename TOutputImage >
void
PadImageFilterBase< TInputImage, TOutputImage >
::InternalSetBoundaryCondition( const BoundaryConditionPointerType boundaryCondition )
{
m_BoundaryCondition = boundaryCondition;
}
} // end namespace itk
#endif
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