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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 itkHashImageFilter_h
#define itkHashImageFilter_h
#include "itkSimpleDataObjectDecorator.h"
#include "itkImageLinearConstIteratorWithIndex.h"
#include "itkCastImageFilter.h"
#include "itkByteSwapper.h"
#include "Ancillary/hl_md5.h"
#include "Ancillary/hl_sha1.h"
namespace itk {
/** \class HashImageFilter
* \brief Generates a hash string from an image.
*
* \note This class utlizes low level buffer pointer access, to work
* with itk::Image and itk::VectorImage. It is modeled after the access
* an ImageFileWriter provides to an ImageIO.
*
* \todo Update in-place on to default after fixing bug in InPlaceImageFilter
*/
template < class TImageType >
class HashImageFilter:
public CastImageFilter< TImageType, TImageType >
{
public:
/** Standard Self typedef */
typedef HashImageFilter Self;
typedef CastImageFilter< TImageType, TImageType > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
typedef typename TImageType::RegionType RegionType;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Runtime information support. */
itkTypeMacro(HashImageFilter, CastImageFilter);
/** Smart Pointer type to a DataObject. */
typedef typename DataObject::Pointer DataObjectPointer;
/** Type of DataObjects used for scalar outputs */
typedef SimpleDataObjectDecorator< std::string > HashObjectType;
/** Get the computed Hash values */
std::string GetHash() const
{ return this->GetHashOutput()->Get(); }
HashObjectType* GetHashOutput()
{ return static_cast< HashObjectType *>( this->ProcessObject::GetOutput(1) ); }
const HashObjectType* GetHashOutput() const
{ return static_cast<const HashObjectType *>( this->ProcessObject::GetOutput(1) ); }
enum HashFunction { SHA1, MD5 };
/** Set/Get hashing function as enumerated type */
itkSetMacro( HashFunction, HashFunction );
itkGetMacro( HashFunction, HashFunction );
/** Make a DataObject of the correct type to be used as the specified
* output. */
typedef ProcessObject::DataObjectPointerArraySizeType DataObjectPointerArraySizeType;
using Superclass::MakeOutput;
virtual DataObjectPointer MakeOutput(DataObjectPointerArraySizeType idx) ITK_OVERRIDE;
protected:
HashImageFilter();
// virtual ~HashImageFilter(); // implementation not needed
virtual void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
// See superclass for doxygen documentation
//
// This method is to do work after the superclass potential threaded
// copy.
void AfterThreadedGenerateData() ITK_OVERRIDE;
// See superclass for doxygen documentation
//
// Override since the filter produces all of its output
void EnlargeOutputRequestedRegion(DataObject *data) ITK_OVERRIDE;
private:
HashImageFilter(const Self &); //purposely not implemented
void operator=(const Self &); //purposely not implemented
HashFunction m_HashFunction;
};
} // end namespace itk
#include "itkHashImageFilter.hxx"
#endif // itkHashImageFilter_h
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