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#ifndef XYSWAPPEDMASK2D_H
#define XYSWAPPEDMASK2D_H
#include "mask2d.h"
#include "image2d.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
*/
template <typename MaskLike>
class XYSwappedMask2D {
public:
explicit XYSwappedMask2D(MaskLike& mask) : _mask(mask) {}
XYSwappedMask2D<MaskLike>& operator=(
const XYSwappedMask2D<MaskLike>& source) {
_mask = source._mask;
return *this;
}
bool Value(unsigned x, unsigned y) const { return _mask.Value(y, x); }
void SetValue(unsigned x, unsigned y, bool newValue) {
_mask.SetValue(y, x, newValue);
}
void SetHorizontalValues(unsigned x, unsigned y, bool value, unsigned count) {
_mask.SetVerticalValues(y, x, value, count);
}
unsigned Width() const { return _mask.Height(); }
unsigned Height() const { return _mask.Width(); }
private:
MaskLike& _mask;
};
template <typename ImageLike>
class XYSwappedImage2D {
public:
explicit XYSwappedImage2D(ImageLike& image) : _image(image) {}
inline num_t Value(unsigned x, unsigned y) const {
return _image.Value(y, x);
}
inline void SetValue(unsigned x, unsigned y, num_t newValue) {
_image.SetValue(y, x, newValue);
}
inline unsigned Width() const { return _image.Height(); }
inline unsigned Height() const { return _image.Width(); }
private:
ImageLike& _image;
};
#endif // XYSWAPPEDMASK2D_H
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