triskele/include/ArrayTree/Border.tpp

#ifndef _OTB_TRISKELE_ARRAY_TREE_BORDER_TPP
#define _OTB_TRISKELE_ARRAY_TREE_BORDER_TPP

inline DimImg
Border::getPixelsCount (const Size &size) {
  return DimImg (size.width)*DimImg (size.height);
}
inline DimImg
Border::getMapLength (DimImg pixelsCount) {
  return (pixelsCount+7)/8;
}

inline bool
Border::isBorder (DimImg idx) const {
  BOOST_ASSERT (idx < pixelsCount);
  return map.size () ? map[idx/8] & (1 << (idx%8)) : defaultVal;
}

inline bool
Border::isBorder (const Point &p) const {
  BOOST_ASSERT (p.x < size.width && p.y < size.height);
  return isBorder (point2idx (size, p));
}

inline void
Border::clearBorder (DimImg idx) {
  if (!map.size ())
    createMap ();
  BOOST_ASSERT (idx < pixelsCount);
  map[idx/8] &= ~(1 << (idx%8));
}

inline void
Border::clearBorder (const Point &p) {
  clearBorder (point2idx (size, p));
}

inline void
Border::setBorder (DimImg idx) {
  if (!map.size ())
    createMap ();
  BOOST_ASSERT (idx < pixelsCount);
  map[idx/8] |= (1 << (idx%8));
}

inline void
Border::setBorder (const Point &p) {
  setBorder (point2idx (size, p));
}

inline
Border::Border ()
  : pixelsCount (0),
    mapLength (0),
    size (),
    map (),
    defaultVal (false) {
}

inline
Border::Border (const Size &size, bool defaultVal)
  : pixelsCount (getPixelsCount (size)),
    size (size),
    mapLength (getMapLength (pixelsCount)),
    map (),
    defaultVal (defaultVal) {
    }

inline
Border::Border (const Border &border, const Rect &tile)
  : size (tile.width, tile.height),
    pixelsCount (getPixelsCount (size)),
    mapLength (getMapLength (pixelsCount)),
    map (),
    defaultVal (border.defaultVal) {
  if (!border.map.size ())
    return;
  // XXX todo
  // width >= 8 => for bytes
  // width < 8 => for bits
  BOOST_ASSERT (false);
}

inline
Border::~Border () {
}

inline void
Border::reset (bool defaultVal) {
  this->defaultVal = defaultVal;
  map.clear ();
}

inline void
Border::createMap () {
  map.assign (mapLength, defaultVal ? 0xFF : 0);
  if (!(mapLength && defaultVal))
    return;
  map[mapLength-1] &= 0xFF >> (8-(pixelsCount%8))%8;
}

inline const Size &
Border::getSize () const {
  return size;
}

inline DimImg
Border::borderCount () {
  DimImg result = 0;
  for (DimImg i = 0; i < mapLength; ++i)
    result += bitCount[map[i]];
  return result;
}

inline ostream &operator << (ostream &out, const Border &border) {
  if (border.size.width > printMapMaxSide || border.size.height > printMapMaxSide) {
    return out << "map too big to print!" << std::endl;
  }
  for (DimSideImg y = 0, idx = 0; y < border.size.height; ++y) {
    for (DimSideImg x = 0; x < border.size.width; ++x, ++idx)
      out << (border.isBorder (idx) ? "  B " : "  - ");
    out << endl;
  }
  return out;
}

#endif // _OTB_TRISKELE_ARRAY_TREE_BORDER_HPP