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/*
* Simd Library (http://ermig1979.github.io/Simd).
*
* Copyright (c) 2011-2017 Yermalayeu Ihar.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __SimdPyramid_hpp__
#define __SimdPyramid_hpp__
#include "Simd/SimdView.hpp"
#include <vector>
namespace Simd
{
/*! @ingroup cpp_pyramid
\short The Pyramid structure provides storage and manipulation of pyramid images.
The pyramid is a series of gray 8-bit images.
Every image in the series is lesser in two times than previous.
The structure is useful for image analysis.
\ref cpp_pyramid_functions.
*/
template <template<class> class A> struct Pyramid
{
typedef A<uint8_t> Allocator; /*!< Allocator type definition. */
/*!
Creates a new empty Pyramid structure.
*/
Pyramid();
/*!
Creates a new Pyramid structure with specified size.
\param [in] size - a size of pyramid's base (lowest and biggest image).
\param [in] levelCount - a number of pyramid levels.
*/
Pyramid(const Point<ptrdiff_t> & size, size_t levelCount);
/*!
Creates a new Pyramid structure with specified size.
\param [in] width - a width of pyramid's base (lowest and biggest image).
\param [in] height - a height of pyramid's base (lowest and biggest image).
\param [in] levelCount - a number of pyramid levels.
*/
Pyramid(size_t width, size_t height, size_t levelCount);
/*!
Re-create a Pyramid structure with specified size.
\param [in] size - a size of pyramid's base (lowest and biggest image).
\param [in] levelCount - a number of pyramid levels.
*/
void Recreate(Point<ptrdiff_t> size, size_t levelCount);
/*!
Re-create a Pyramid structure with specified size.
\param [in] width - a width of pyramid's base (lowest and biggest image).
\param [in] height - a height of pyramid's base (lowest and biggest image).
\param [in] levelCount - a number of pyramid levels.
*/
void Recreate(size_t width, size_t height, size_t levelCount);
/*!
Gets number of levels in the pyramid.
\return - number of levels in the pyramid.
*/
size_t Size() const;
/*!
Gets an image at given level of the pyramid.
\param [in] level - a level of the pyramid.
\return - a reference to the image at given level of the pyramid.
*/
View<A> & operator [] (size_t level);
/*!
Gets an image at given level of the pyramid.
\param [in] level - a level of the pyramid.
\return - a constant reference to the image at given level of the pyramid.
*/
const View<A> & operator [] (size_t level) const;
/*!
Gets an image at given level of the pyramid.
\param [in] level - a level of the pyramid.
\return - a reference to the image at given level of the pyramid.
*/
View<A> & At(size_t level);
/*!
Gets an image at on given level of the pyramid.
\param [in] level - a level of the pyramid.
\return - a constant reference to the image at given level of the pyramid.
*/
const View<A> & At(size_t level) const;
/*!
Gets an image at top level of the pyramid.
\return - a reference to the image at top level of the pyramid.
*/
View<A> & Top();
/*!
Gets an image at top level of the pyramid.
\return - a constant reference to the image at top level of the pyramid.
*/
const View<A> & Top() const;
/*!
Swaps two pyramids.
\param [in] pyramid - other pyramid.
*/
void Swap(Pyramid<A> & pyramid);
private:
std::vector< View<A> > _views;
};
/*! @ingroup cpp_pyramid_functions
\fn Point<ptrdiff_t> Scale(Point<ptrdiff_t> size, int scale = 2);
\short Scales size of an image.
\note This function is useful for Pyramid structure.
\param [in] size - an original image size.
\param [in] scale - a scale. It must be a multiple of 2. By default it is equal to 2.
\return scaled size.
*/
Point<ptrdiff_t> Scale(Point<ptrdiff_t> size, int scale = 2);
//-------------------------------------------------------------------------
// struct Pyramid implementation:
template <template<class> class A>
SIMD_INLINE Pyramid<A>::Pyramid()
{
}
template <template<class> class A>
SIMD_INLINE Pyramid<A>::Pyramid(const Point<ptrdiff_t> & size, size_t levelCount)
{
Recreate(size, levelCount);
}
template <template<class> class A>
SIMD_INLINE Pyramid<A>::Pyramid(size_t width, size_t height, size_t levelCount)
{
Recreate(width, height, levelCount);
}
template <template<class> class A>
SIMD_INLINE void Pyramid<A>::Recreate(Point<ptrdiff_t> size, size_t levelCount)
{
if (_views.size() && size == _views[0].Size())
return;
_views.resize(levelCount);
for (size_t level = 0; level < levelCount; ++level)
{
_views[level].Recreate(size, View<A>::Gray8);
size = Scale(size);
}
}
template <template<class> class A>
SIMD_INLINE void Pyramid<A>::Recreate(size_t width, size_t height, size_t levelCount)
{
Recreate(Point<ptrdiff_t>(width, height), levelCount);
}
template <template<class> class A>
SIMD_INLINE size_t Pyramid<A>::Size() const
{
return _views.size();
}
template <template<class> class A>
SIMD_INLINE View<A> & Pyramid<A>::operator [] (size_t level)
{
return _views[level];
}
template <template<class> class A>
SIMD_INLINE const View<A> & Pyramid<A>::operator [] (size_t level) const
{
return _views[level];
}
template <template<class> class A>
SIMD_INLINE View<A> & Pyramid<A>::At(size_t level)
{
return _views[level];
}
template <template<class> class A>
SIMD_INLINE const View<A> & Pyramid<A>::At(size_t level) const
{
return _views[level];
}
template <template<class> class A>
SIMD_INLINE View<A> & Pyramid<A>::Top()
{
return _views.back();
}
template <template<class> class A>
SIMD_INLINE const View<A> & Pyramid<A>::Top() const
{
return _views.back();
}
template <template<class> class A>
SIMD_INLINE void Pyramid<A>::Swap(Pyramid & pyramid)
{
_views.swap(pyramid._views);
}
// Pyramid utilities implementation:
SIMD_INLINE Point<ptrdiff_t> Scale(Point<ptrdiff_t> size, int scale)
{
while (scale > 1)
{
assert(scale % 2 == 0);
size.x = (size.x + 1) >> 1;
size.y = (size.y + 1) >> 1;
scale >>= 1;
}
return size;
}
}
#endif//__SimdPyramid_hpp__
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