merge.h

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/*
 *  Merging operators
 */
#ifndef AIMS_UTILITY_MERGE_H
#define AIMS_UTILITY_MERGE_H

#include <aims/config/aimsdata_config.h>
#include <aims/data/data.h>

AIMSDATA_API enum merge_t
{
  AIMS_MERGE_SAME_VALUES,
  AIMS_MERGE_ONE_TO_ONE,
  AIMS_MERGE_ALL_TO_ONE,
  AIMS_MERGE_ONE_TO_MAXP1,
  AIMS_MERGE_ALL_TO_MAXP1
};


template <class T,class U>
class AIMSDATA_API AimsMerge
{
  public :
    AimsMerge(merge_t type,T value=0,U label=0);
    virtual ~AimsMerge() {}

    inline AimsData<T> operator () (const AimsData<T> &data,
                                    const AimsData<U> &mask);

  protected :
    merge_t _type;
    T    _value;
    U    _label;
};


template <class T,class U>
AimsMerge<T,U>::AimsMerge(merge_t type,T value,U label)
{
  _type   = type;
  _value  = value;
  _label  = label;

}


template <class T,class U> inline
AimsData<T> AimsMerge<T,U>::operator () (const AimsData<T> &data,
                                         const AimsData<U> &mask)
{ ASSERT(data.dimX() == mask.dimX() &&
         data.dimY() == mask.dimY() &&
         data.dimZ() == mask.dimZ() &&
         data.dimT() == mask.dimT()  );

  AimsData<T> res = data.clone();

  typename AimsData<T>::iterator       it1;
  typename AimsData<U>::const_iterator it2;

  switch (_type)
  { case AIMS_MERGE_SAME_VALUES : 
      for (it1=res.begin(),it2=mask.begin();it1<res.end();it1++,it2++)
        if (*it2) *it1 = (T)*it2;
      break;
    case AIMS_MERGE_ONE_TO_ONE : 
      for (it1=res.begin(),it2=mask.begin();it1<res.end();it1++,it2++)
        if (*it2==_label) *it1 = (T)_value;
      break;
    case AIMS_MERGE_ALL_TO_ONE : 
      for (it1=res.begin(),it2=mask.begin();it1<res.end();it1++,it2++)
        if (*it2) *it1 = (T)_value;
      break;
    case AIMS_MERGE_ONE_TO_MAXP1 : 
      _value = res.maximum() + 1;
      for (it1=res.begin(),it2=mask.begin();it1<res.end();it1++,it2++)
        if (*it2==_label) *it1 = (T)_value;
      break;
    case AIMS_MERGE_ALL_TO_MAXP1 : 
      _value = res.maximum() + 1;
      for (it1=res.begin(),it2=mask.begin();it1<res.end();it1++,it2++)
        if (*it2) *it1 = (T)_value;
      break;
  }
  return(res);
}


#endif