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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 itkPadImageFilter_hxx
#define itkPadImageFilter_hxx
#include "itkPadImageFilter.h"
#include "itkImageAlgorithm.h"
#include "itkImageRegionExclusionIteratorWithIndex.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkObjectFactory.h"
#include "itkProgressReporter.h"
namespace itk
{
/**
*
*/
template< typename TInputImage, typename TOutputImage >
PadImageFilter< TInputImage, TOutputImage >
::PadImageFilter()
{
for ( unsigned int j = 0; j < ImageDimension; j++ )
{
m_PadLowerBound[j] = 0;
m_PadUpperBound[j] = 0;
}
}
/**
*
*/
template< typename TInputImage, typename TOutputImage >
void
PadImageFilter< TInputImage, TOutputImage >
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Output Pad Lower Bounds: [";
if ( ImageDimension >= 1 )
{
os << m_PadLowerBound[0];
}
for ( unsigned int j = 1; j < ImageDimension; j++ )
{
os << ", " << m_PadLowerBound[j];
}
os << "]" << std::endl;
os << indent << "Output Pad Upper Bounds: [";
if ( ImageDimension >= 1 )
{
os << m_PadUpperBound[0];
}
for ( unsigned int j = 1; j < ImageDimension; j++ )
{
os << ", " << m_PadUpperBound[j];
}
os << "]" << std::endl;
}
/**
* PadImageFilter produces an image which is a different resolution
* than its input image. As such, PadImageFilter needs to provide an
* implementation for GenerateOutputInformation() in order to inform
* the pipeline execution model. The original documentation of this
* method is below.
*
* \sa ProcessObject::GenerateOutputInformaton()
*/
template< typename TInputImage, typename TOutputImage >
void
PadImageFilter< TInputImage, TOutputImage >
::GenerateOutputInformation()
{
// call the superclass' implementation of this method
Superclass::GenerateOutputInformation();
// get pointers to the input and output
typename Superclass::InputImageConstPointer inputPtr = this->GetInput();
typename Superclass::OutputImagePointer outputPtr = this->GetOutput();
if ( !outputPtr || !inputPtr )
{
return;
}
// we need to compute the output image size, and the
// output image start index
unsigned int i;
typename TOutputImage::SizeType outputSize;
typename TOutputImage::IndexType outputStartIndex;
typename TInputImage::SizeType inputSize;
typename TInputImage::IndexType inputStartIndex;
inputSize = inputPtr->GetLargestPossibleRegion().GetSize();
inputStartIndex = inputPtr->GetLargestPossibleRegion().GetIndex();
for ( i = 0; i < TOutputImage::ImageDimension; i++ )
{
outputSize[i] = inputSize[i] + m_PadLowerBound[i] + m_PadUpperBound[i];
outputStartIndex[i] = inputStartIndex[i] - static_cast< OffsetValueType >( m_PadLowerBound[i] );
}
typename TOutputImage::RegionType outputLargestPossibleRegion;
outputLargestPossibleRegion.SetSize(outputSize);
outputLargestPossibleRegion.SetIndex(outputStartIndex);
outputPtr->SetLargestPossibleRegion(outputLargestPossibleRegion);
}
} // end namespace itk
#endif
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