102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
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/*
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Copyright 2005-2007 Adobe Systems Incorporated
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Distributed under the MIT License (see accompanying file LICENSE_1_0_0.txt
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or a copy at http://opensource.adobe.com/licenses.html)
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*/
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/*************************************************************************************************/
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#ifndef GIL_KERNEL_HPP
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#define GIL_KERNEL_HPP
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/*!
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/// \file
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/// \brief Definitions of 1D fixed-size and variable-size kernels and related operations
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/// \author Hailin Jin and Lubomir Bourdev \n
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/// Adobe Systems Incorporated
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/// \date 2005-2007 \n Last updated on September 26, 2006
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*/
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#include <cstddef>
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#include <cassert>
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#include <algorithm>
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#include <vector>
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#include <memory>
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#include <boost/array.hpp>
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#include <boost/gil/gil_config.hpp>
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#include <boost/gil/utilities.hpp>
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namespace boost { namespace gil {
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namespace detail {
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/// \brief kernel adaptor for one-dimensional cores
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/// Core needs to provide size(),begin(),end(),operator[],
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/// value_type,iterator,const_iterator,reference,const_reference
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template <typename Core>
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class kernel_1d_adaptor : public Core {
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private:
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std::size_t _center;
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public:
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kernel_1d_adaptor() : _center(0) {}
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explicit kernel_1d_adaptor(std::size_t center_in) : _center(center_in) {assert(_center<this->size());}
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kernel_1d_adaptor(std::size_t size_in,std::size_t center_in) :
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Core(size_in), _center(center_in) {assert(_center<this->size());}
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kernel_1d_adaptor(const kernel_1d_adaptor& k_in) : Core(k_in), _center(k_in._center) {}
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kernel_1d_adaptor& operator=(const kernel_1d_adaptor& k_in) {
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Core::operator=(k_in);
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_center=k_in._center;
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return *this;
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}
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std::size_t left_size() const {assert(_center<this->size());return _center;}
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std::size_t right_size() const {assert(_center<this->size());return this->size()-_center-1;}
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std::size_t& center() {return _center;}
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const std::size_t& center() const {return _center;}
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};
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} // namespace detail
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/// \brief variable-size kernel
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template <typename T, typename Alloc = std::allocator<T> >
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class kernel_1d : public detail::kernel_1d_adaptor<std::vector<T,Alloc> > {
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typedef detail::kernel_1d_adaptor<std::vector<T,Alloc> > parent_t;
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public:
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kernel_1d() {}
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kernel_1d(std::size_t size_in,std::size_t center_in) : parent_t(size_in,center_in) {}
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template <typename FwdIterator>
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kernel_1d(FwdIterator elements, std::size_t size_in, std::size_t center_in) : parent_t(size_in,center_in) {
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detail::copy_n(elements,size_in,this->begin());
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}
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kernel_1d(const kernel_1d& k_in) : parent_t(k_in) {}
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};
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/// \brief static-size kernel
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template <typename T,std::size_t Size>
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class kernel_1d_fixed : public detail::kernel_1d_adaptor<array<T,Size> > {
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typedef detail::kernel_1d_adaptor<array<T,Size> > parent_t;
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public:
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kernel_1d_fixed() {}
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explicit kernel_1d_fixed(std::size_t center_in) : parent_t(center_in) {}
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template <typename FwdIterator>
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explicit kernel_1d_fixed(FwdIterator elements, std::size_t center_in) : parent_t(center_in) {
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detail::copy_n(elements,Size,this->begin());
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}
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kernel_1d_fixed(const kernel_1d_fixed& k_in) : parent_t(k_in) {}
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};
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/// \brief reverse a kernel
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template <typename Kernel>
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inline Kernel reverse_kernel(const Kernel& kernel) {
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Kernel result(kernel);
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result.center()=kernel.right_size();
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std::reverse(result.begin(), result.end());
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return result;
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}
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} } // namespace boost::gil
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#endif
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