elxOpenCLResampler.h

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 *  Copyright UMC Utrecht and contributors
 *
 *  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
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 *  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
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#ifndef __elxOpenCLResampler_h
#define __elxOpenCLResampler_h
 
#include "elxIncludes.h" // include first to avoid MSVS warning
#include "elxOpenCLSupportedImageTypes.h"
 
#include "itkGPUResampleImageFilter.h"
#include "itkGPUAdvancedCombinationTransformCopier.h"
#include "itkGPUInterpolatorCopier.h"
 
namespace elastix
{
 
template< class TElastix >
class OpenCLResampler :
  public itk::ResampleImageFilter<
  typename ResamplerBase< TElastix >::InputImageType,
  typename ResamplerBase< TElastix >::OutputImageType,
  typename ResamplerBase< TElastix >::CoordRepType >,
  public ResamplerBase< TElastix >
{
public:
 
  typedef OpenCLResampler Self;
 
  typedef itk::ResampleImageFilter<
    typename ResamplerBase< TElastix >::InputImageType,
    typename ResamplerBase< TElastix >::OutputImageType,
    typename ResamplerBase< TElastix >::CoordRepType > Superclass1;
  typedef ResamplerBase< TElastix >       Superclass2;
  typedef itk::SmartPointer< Self >       Pointer;
  typedef itk::SmartPointer< const Self > ConstPointer;
 
  itkNewMacro( Self );
 
  itkTypeMacro( OpenCLResampler, ResampleImageFilter );
 
  elxClassNameMacro( "OpenCLResampler" );
 
  typedef typename Superclass1::InterpolatorType InterpolatorType;
  typedef typename Superclass1::TransformType    TransformType;
 
  typedef typename Superclass1::InputImageType InputImageType;
  typedef typename InputImageType::PixelType   InputImagePixelType;
 
  typedef typename Superclass1::OutputImageType OutputImageType;
  typedef typename OutputImageType::PixelType   OutputImagePixelType;
  typedef typename OutputImageType::RegionType  OutputImageRegionType;
 
  typedef itk::GPUImage< InputImagePixelType, InputImageType::ImageDimension >
    GPUInputImageType;
  typedef typename GPUInputImageType::Pointer GPUInputImagePointer;
  typedef itk::GPUImage< OutputImagePixelType, OutputImageType::ImageDimension >
    GPUOutputImageType;
  typedef float GPUInterpolatorPrecisionType;
 
  typedef itk::GPUResampleImageFilter<
    GPUInputImageType,
    GPUOutputImageType,
    GPUInterpolatorPrecisionType > GPUResamplerType;
  typedef typename GPUResamplerType::Pointer GPUResamplerPointer;
 
  virtual void SetTransform( const TransformType * _arg );
 
  virtual void SetInterpolator( InterpolatorType * _arg );
 
  virtual void BeforeRegistration( void );
 
  virtual void ReadFromFile( void );
 
  virtual void WriteToFile( void ) const;
 
protected:
 
  OpenCLResampler();
  virtual ~OpenCLResampler() {}
 
  void BeforeGenerateData( void );
 
  virtual void GenerateData( void );
 
  typedef typename ResamplerBase< TElastix >::CoordRepType InterpolatorPrecisionType;
  typedef typename itk::AdvancedCombinationTransform< InterpolatorPrecisionType, OutputImageType::ImageDimension >
    AdvancedCombinationTransformType;
  typedef typename itk::GPUAdvancedCombinationTransformCopier<
    OpenCLImageTypes, OpenCLImageDimentions, AdvancedCombinationTransformType, float >
    TransformCopierType;
  typedef typename TransformCopierType::Pointer                  TransformCopierPointer;
  typedef typename TransformCopierType::GPUComboTransformPointer GPUTransformPointer;
 
  typedef typename InterpolatorType::InputImageType InterpolatorInputImageType;
  typedef typename InterpolatorType::CoordRepType   InterpolatorCoordRepType;
  typedef itk::InterpolateImageFunction< InterpolatorInputImageType, InterpolatorCoordRepType >
    InterpolateImageFunctionType;
  typedef typename itk::GPUInterpolatorCopier<
    OpenCLImageTypes, OpenCLImageDimentions, InterpolateImageFunctionType, float >
    InterpolateCopierType;
  typedef typename InterpolateCopierType::Pointer                        InterpolateCopierPointer;
  typedef typename InterpolateCopierType::GPUExplicitInterpolatorPointer GPUExplicitInterpolatorPointer;
 
private:
 
  OpenCLResampler( const Self & ); // purposely not implemented
  void operator=( const Self & );  // purposely not implemented
 
  void SwitchingToCPUAndReport( const bool configError );
 
  void ReportToLog( void );
 
  TransformCopierPointer   m_TransformCopier;
  InterpolateCopierPointer m_InterpolatorCopier;
  GPUResamplerPointer      m_GPUResampler;
  bool                     m_GPUResamplerReady;
  bool                     m_GPUResamplerCreated;
  bool                     m_ContextCreated;
  bool                     m_UseOpenCL;
};
 
// end class OpenCLResampler
 
} // end namespace elastix
 
#ifndef ITK_MANUAL_INSTANTIATION
#include "elxOpenCLResampler.hxx"
#endif
 
#endif // end #ifndef __elxOpenCLResampler_h