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 <cartodata/volume/volume.h>
 
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 AimsMerge
{
  public :
    AimsMerge(merge_t type,T value=0,U label=0);
    virtual ~AimsMerge() {}
 
    inline carto::VolumeRef<T> operator () (
      const carto::rc_ptr<carto::Volume<T> > & data,
      const carto::rc_ptr<carto::Volume<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
carto::VolumeRef<T> AimsMerge<T,U>::operator () (
  const carto::rc_ptr<carto::Volume<T> > & data,
  const carto::rc_ptr<carto::Volume<U> > & mask )
{
  ASSERT(data->getSizeX() == mask->getSizeX() &&
         data->getSizeY() == mask->getSizeY() &&
         data->getSizeZ() == mask->getSizeZ() &&
         data->getSizeT() == mask->getSizeT()  );
 
  carto::VolumeRef<T> res = carto::VolumeRef<T>( data ).deepcopy();
 
  typename carto::Volume<T>::iterator       it1;
  typename carto::Volume<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.max() + 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.max() + 1;
      for (it1=res.begin(),it2=mask->begin();it1!=res.end();it1++,it2++)
        if (*it2) *it1 = (T)_value;
      break;
  }
  return(res);
}
 
 
#endif