itkGPUDiscreteGaussianImageFilter.h

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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 __itkGPUDiscreteGaussianImageFilter_h
#define __itkGPUDiscreteGaussianImageFilter_h

#include "itkGPUImage.h"
#include "itkGPUImageToImageFilter.h"
#include "itkGPUNeighborhoodOperatorImageFilter.h"
#include "itkDiscreteGaussianImageFilter.h"

namespace itk
{
template< typename TInputImage, typename TOutputImage >
class GPUDiscreteGaussianImageFilter :
  public GPUImageToImageFilter< TInputImage, TOutputImage, DiscreteGaussianImageFilter< TInputImage, TOutputImage > >
{
public:
  typedef GPUDiscreteGaussianImageFilter                                    Self;
  typedef DiscreteGaussianImageFilter< TInputImage, TOutputImage >          CPUSuperclass;
  typedef GPUImageToImageFilter< TInputImage, TOutputImage, CPUSuperclass > GPUSuperclass;
  typedef SmartPointer< Self >                                              Pointer;
  typedef SmartPointer< const Self >                                        ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(GPUDiscreteGaussianImageFilter, GPUImageToImageFilter);

  typedef TInputImage  InputImageType;
  typedef TOutputImage OutputImageType;

  itkStaticConstMacro(ImageDimension, unsigned int,
                      TOutputImage::ImageDimension);

  typedef typename TOutputImage::PixelType         OutputPixelType;
  typedef typename TOutputImage::InternalPixelType OutputInternalPixelType;
  typedef typename TInputImage::PixelType          InputPixelType;
  typedef typename TInputImage::InternalPixelType  InputInternalPixelType;

  typedef typename NumericTraits<InputPixelType>::ValueType  InputPixelValueType;
  typedef typename NumericTraits<OutputPixelType>::ValueType OutputPixelValueType;

  typedef OutputPixelType
                                                                         RealOutputPixelType;
  typedef GPUImage< OutputPixelType,
                    ImageDimension >                                     RealOutputImageType;
  typedef typename NumericTraits<RealOutputPixelType>::ValueType
                                                                         RealOutputPixelValueType;
  typedef GPUNeighborhoodOperatorImageFilter< InputImageType, RealOutputImageType,
                                              RealOutputPixelValueType > FirstFilterType;
  typedef GPUNeighborhoodOperatorImageFilter< RealOutputImageType, RealOutputImageType,
                                              RealOutputPixelValueType > IntermediateFilterType;
  typedef GPUNeighborhoodOperatorImageFilter< RealOutputImageType, OutputImageType,
                                              RealOutputPixelValueType > LastFilterType;
  typedef GPUNeighborhoodOperatorImageFilter< InputImageType, OutputImageType,
                                              RealOutputPixelValueType > SingleFilterType;

  virtual void GenerateInputRequestedRegion();

protected:
  GPUDiscreteGaussianImageFilter();

  virtual ~GPUDiscreteGaussianImageFilter() {
  }
  void PrintSelf(std::ostream & os, Indent indent) const;

  void GPUGenerateData();

private:
  GPUDiscreteGaussianImageFilter(const Self &); //purposely not implemented
  void operator=(const Self &);                 //purposely not implemented

  typename FirstFilterType::Pointer                       m_FirstFilter;
  typename LastFilterType::Pointer                        m_LastFilter;
  std::vector< typename IntermediateFilterType::Pointer > m_IntermediateFilters;
  typename SingleFilterType::Pointer                      m_SingleFilter;
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkGPUDiscreteGaussianImageFilter.hxx"
#endif

#endif