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#ifndef XYSWAPPEDMASK2D_H
#define XYSWAPPEDMASK2D_H
#include <boost/shared_ptr.hpp>
#include "mask2d.h"
/**
* This class wraps a mask and swappes the x and y axes. It provides only the
* trivial @ref Mask2D functions, and swappes x and y in there, such that the original
* width becomes the new height, etc. It is useful to convert an algorithm
* that works originally only in one direction to work in the other direction
* without rewriting it. If a template parameter is used, the overhead should
* be negligable.
*
* Note that this method uses references to the original mask. However, masks
* are normally wrapped in a smart pointer. The caller should make sure the
* mask exists as long as the XYSwappedMask2D exists.
*
* @author Andre Offringa
*/
class XYSwappedMask2D
{
public:
inline XYSwappedMask2D(Mask2D &mask) : _mask(mask)
{
}
inline bool Value(unsigned x, unsigned y) const
{
return _mask.Value(y, x);
}
inline void SetValue(unsigned x, unsigned y, bool newValue)
{
_mask.SetValue(y, x, newValue);
}
inline unsigned Width() const
{
return _mask.Height();
}
inline unsigned Height() const
{
return _mask.Width();
}
private:
Mask2D &_mask;
};
#endif // XYSWAPPEDMASK2D_H
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