mlPageIDIterator.h

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/*************************************************************************************
**
** Copyright 2009, MeVis Medical Solutions AG
**
** The user may use this file in accordance with the license agreement provided with
** the Software or, alternatively, in accordance with the terms contained in a
** written agreement between the user and MeVis Medical Solutions AG.
**
** For further information use the contact form at https://www.mevislab.de/contact
**
**************************************************************************************/
 
#ifndef ML_PAGE_IDITERATOR_H
#define ML_PAGE_IDITERATOR_H

 
// ML-includes
#include "mlInitSystemML.h"
 
#include "mlPagedImage.h"
 
ML_START_NAMESPACE
 
//-------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------
class PageIDIterator
{
 
public:

  MLEXPORT PageIDIterator();

  MLEXPORT PageIDIterator(PagedImage& image, const SubImageBox& box);

  MLEXPORT ~PageIDIterator();

  MLEXPORT void setup(PagedImage& image, const SubImageBox& box);

  inline MLint getNextPageID() {
    MLint result = _currentPageId;
 
    // in case of being the last pageid, we stop incrementing
    if (result==_lastPageId) {
      return result;
    }
 
    // increment the page ID in all 6 dimensions if overflow occurs:
    _currentPageId++;
    _currentPosition.x++;
    if (_currentPosition.x >= _pageBoxExtent.x) {
      _currentPosition.x = 0;
      _currentPageId -= _pageBoxExtent.x;
 
      _currentPageId += _pageStride.y;
      _currentPosition.y++;
      if (_currentPosition.y >= _pageBoxExtent.y) {
        _currentPosition.y = 0;
        _currentPageId -= _pageBoxExtent.y * _pageStride.y;
 
        _currentPageId += _pageStride.z;
        _currentPosition.z++;
        if (_currentPosition.z >= _pageBoxExtent.z) {
          _currentPosition.z = 0;
          _currentPageId -= _pageBoxExtent.z * _pageStride.z;
 
          _currentPageId += _pageStride.c;
          _currentPosition.c++;
          if (_currentPosition.c >= _pageBoxExtent.c) {
            _currentPosition.c = 0;
            _currentPageId -= _pageBoxExtent.c * _pageStride.c;
 
            _currentPageId += _pageStride.t;
            _currentPosition.t++;
            if (_currentPosition.t >= _pageBoxExtent.t) {
              _currentPosition.t = 0;
              _currentPageId -= _pageBoxExtent.t * _pageStride.t;
 
              _currentPageId += _pageStride.u;
              _currentPosition.u++;
            }
          }
        }
      }
    }
    return result;
  }

  inline MLint getNumPages() const { return _numberOfPages; }
 
private:
  ImageVector _pageStride;
  ImageVector _currentPosition;
  ImageVector _pageBoxExtent;
  MLint  _currentPageId;
  MLint  _lastPageId;
  MLint  _numberOfPages;
 
};
 
ML_END_NAMESPACE
 
#endif //of __mlPageIDIterator_H