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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 itkCastImageFilter_hxx
#define itkCastImageFilter_hxx
#include "itkCastImageFilter.h"
#include "itkProgressReporter.h"
#include "itkImageAlgorithm.h"
namespace itk
{
template< typename TInputImage, typename TOutputImage >
CastImageFilter< TInputImage, TOutputImage >
::CastImageFilter()
{
this->SetNumberOfRequiredInputs(1);
this->InPlaceOff();
}
template< typename TInputImage, typename TOutputImage >
void
CastImageFilter< TInputImage, TOutputImage >
::GenerateData()
{
if ( this->GetInPlace() && this->CanRunInPlace() )
{
// nothing to do, so avoid iterating over all the pixels
// for nothing! Allocate the output, generate a fake progress and exit
this->AllocateOutputs();
ProgressReporter progress(this, 0, 1);
return;
}
Superclass::GenerateData();
}
template< typename TInputImage, typename TOutputImage >
void
CastImageFilter< TInputImage, TOutputImage >
::GenerateOutputInformation()
{
// do not call the superclass' implementation of this method since
// this filter allows the input the output to be of different dimensions
// get pointers to the input and output
TOutputImage *outputPtr = this->GetOutput();
const TInputImage *inputPtr = this->GetInput();
if ( !outputPtr || !inputPtr )
{
return;
}
// Set the output image largest possible region. Use a RegionCopier
// so that the input and output images can be different dimensions.
OutputImageRegionType outputLargestPossibleRegion;
this->CallCopyInputRegionToOutputRegion( outputLargestPossibleRegion,
inputPtr->GetLargestPossibleRegion() );
outputPtr->SetLargestPossibleRegion(outputLargestPossibleRegion);
ImageToImageFilterDetail::ImageInformationCopier<Superclass::OutputImageDimension,
Superclass::InputImageDimension>
informationCopier;
informationCopier(outputPtr, inputPtr);
}
template< typename TInputImage, typename TOutputImage >
void
CastImageFilter< TInputImage, TOutputImage >
::ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread,
ThreadIdType threadId)
{
const TInputImage *inputPtr = this->GetInput();
TOutputImage *outputPtr = this->GetOutput(0);
// Define the portion of the input to walk for this thread, using
// the CallCopyOutputRegionToInputRegion method allows for the input
// and output images to be different dimensions
typename TInputImage::RegionType inputRegionForThread;
this->CallCopyOutputRegionToInputRegion(inputRegionForThread, outputRegionForThread);
// when progress is destroyed it'll set progress to 1.0
ProgressReporter progress(this, threadId, 1);
ImageAlgorithm::Copy( inputPtr, outputPtr, inputRegionForThread, outputRegionForThread );
}
} // end namespace itk
#endif
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