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199 lines
9.9 KiB
C++
199 lines
9.9 KiB
C++
/*
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Copyright 2005-2007 Adobe Systems Incorporated
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Use, modification and distribution are subject to the Boost Software License,
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Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt).
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See http://stlab.adobe.com/gil for most recent version including documentation.
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*/
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/*************************************************************************************************/
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#ifndef GIL_PLANAR_REF_H
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#define GIL_PLANAR_REF_H
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////////////////////////////////////////////////////////////////////////////////////////
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/// \file
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/// \brief planar pixel reference class
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/// \author Lubomir Bourdev and Hailin Jin \n
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/// Adobe Systems Incorporated
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/// \date 2005-2007 \n Last updated on September 28, 2006
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///
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////////////////////////////////////////////////////////////////////////////////////////
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#include <boost/mpl/range_c.hpp>
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#include "gil_config.hpp"
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#include "gil_concept.hpp"
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#include "color_base.hpp"
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#include "channel.hpp"
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#include "pixel.hpp"
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#include "planar_pixel_iterator.hpp"
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namespace boost { namespace gil {
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/// \defgroup ColorBaseModelPlanarRef planar_pixel_reference
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/// \ingroup ColorBaseModel
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/// \brief A homogeneous color base whose element is a channel reference. Models HomogeneousColorBaseConcept, HomogeneousPixelConcept.
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/// This class is used as a reference proxy to a planar pixel.
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/// \defgroup PixelModelPlanarRef planar_pixel_reference
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/// \ingroup PixelModel
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/// \brief A reference proxy to a planar pixel. Models HomogeneousColorBaseConcept, HomogeneousPixelConcept.
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/// \ingroup PixelModelPlanarRef ColorBaseModelPlanarRef PixelBasedModel
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/// \brief A reference proxy to a planar pixel. Models: HomogeneousColorBaseConcept, HomogeneousPixelConcept
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///
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/// A reference to a planar pixel is a proxy class containing references to each of the corresponding channels.
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///
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template <typename ChannelReference, typename ColorSpace> // ChannelReference is a channel reference (const or mutable)
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struct planar_pixel_reference
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: public detail::homogeneous_color_base<ChannelReference,layout<ColorSpace>,mpl::size<ColorSpace>::value> {
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typedef detail::homogeneous_color_base<ChannelReference,layout<ColorSpace>,mpl::size<ColorSpace>::value> parent_t;
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private:
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// These three are only defined for homogeneous pixels
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typedef typename channel_traits<ChannelReference>::value_type channel_t;
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typedef typename channel_traits<ChannelReference>::const_reference channel_const_reference;
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public:
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BOOST_STATIC_CONSTANT(bool, is_mutable = channel_traits<ChannelReference>::is_mutable);
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typedef pixel<channel_t,layout<ColorSpace> > value_type;
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typedef planar_pixel_reference reference;
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typedef planar_pixel_reference<channel_const_reference,ColorSpace> const_reference;
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planar_pixel_reference(ChannelReference v0, ChannelReference v1) : parent_t(v0,v1) {}
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planar_pixel_reference(ChannelReference v0, ChannelReference v1, ChannelReference v2) : parent_t(v0,v1,v2) {}
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planar_pixel_reference(ChannelReference v0, ChannelReference v1, ChannelReference v2, ChannelReference v3) : parent_t(v0,v1,v2,v3) {}
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planar_pixel_reference(ChannelReference v0, ChannelReference v1, ChannelReference v2, ChannelReference v3, ChannelReference v4) : parent_t(v0,v1,v2,v3,v4) {}
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planar_pixel_reference(ChannelReference v0, ChannelReference v1, ChannelReference v2, ChannelReference v3, ChannelReference v4, ChannelReference v5) : parent_t(v0,v1,v2,v3,v4,v5) {}
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template <typename P> planar_pixel_reference(const P& p) : parent_t(p) { check_compatible<P>();}
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// PERFORMANCE_CHECK: Is this constructor necessary?
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template <typename ChannelV, typename Mapping>
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planar_pixel_reference(pixel<ChannelV,layout<ColorSpace,Mapping> >& p) : parent_t(p) { check_compatible<pixel<ChannelV,layout<ColorSpace,Mapping> > >();}
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// Construct at offset from a given location
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template <typename ChannelPtr> planar_pixel_reference(const planar_pixel_iterator<ChannelPtr,ColorSpace>& p, std::ptrdiff_t diff) : parent_t(p,diff) {}
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const planar_pixel_reference& operator=(const planar_pixel_reference& p) const { static_copy(p,*this); return *this; }
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template <typename P> const planar_pixel_reference& operator=(const P& p) const { check_compatible<P>(); static_copy(p,*this); return *this; }
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// This overload is necessary for a compiler implementing Core Issue 574
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// to prevent generation of an implicit copy assignment operator (the reason
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// for generating implicit copy assignment operator is that according to
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// Core Issue 574, a cv-qualified assignment operator is not considered
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// "copy assignment operator").
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// EDG implemented Core Issue 574 starting with EDG Version 3.8. I'm not
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// sure why they did it for a template member function as well.
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#if BOOST_WORKAROUND(__HP_aCC, >= 61700) || BOOST_WORKAROUND(__INTEL_COMPILER, >= 1000)
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const planar_pixel_reference& operator=(const planar_pixel_reference& p) { static_copy(p,*this); return *this; }
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template <typename P> const planar_pixel_reference& operator=(const P& p) { check_compatible<P>(); static_copy(p,*this); return *this; }
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#endif
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template <typename P> bool operator==(const P& p) const { check_compatible<P>(); return static_equal(*this,p); }
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template <typename P> bool operator!=(const P& p) const { return !(*this==p); }
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ChannelReference operator[](std::size_t i) const { return this->at_c_dynamic(i); }
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const planar_pixel_reference* operator->() const { return this; }
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private:
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template <typename Pixel> static void check_compatible() { gil_function_requires<PixelsCompatibleConcept<Pixel,planar_pixel_reference> >(); }
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};
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/////////////////////////////
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// ColorBasedConcept
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/////////////////////////////
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template <typename ChannelReference, typename ColorSpace, int K>
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struct kth_element_type<planar_pixel_reference<ChannelReference,ColorSpace>, K> {
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typedef ChannelReference type;
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};
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template <typename ChannelReference, typename ColorSpace, int K>
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struct kth_element_reference_type<planar_pixel_reference<ChannelReference,ColorSpace>, K> {
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typedef ChannelReference type;
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};
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template <typename ChannelReference, typename ColorSpace, int K>
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struct kth_element_const_reference_type<planar_pixel_reference<ChannelReference,ColorSpace>, K>
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: public add_reference<typename add_const<ChannelReference>::type>
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{
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// typedef typename channel_traits<ChannelReference>::const_reference type;
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};
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/////////////////////////////
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// PixelConcept
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/////////////////////////////
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/// \brief Metafunction predicate that flags planar_pixel_reference as a model of PixelConcept. Required by PixelConcept
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/// \ingroup PixelModelPlanarRef
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template <typename ChannelReference, typename ColorSpace>
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struct is_pixel< planar_pixel_reference<ChannelReference,ColorSpace> > : public mpl::true_{};
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/////////////////////////////
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// HomogeneousPixelBasedConcept
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/////////////////////////////
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/// \brief Specifies the color space type of a planar pixel reference. Required by PixelBasedConcept
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/// \ingroup PixelModelPlanarRef
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template <typename ChannelReference, typename ColorSpace>
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struct color_space_type<planar_pixel_reference<ChannelReference,ColorSpace> > {
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typedef ColorSpace type;
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};
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/// \brief Specifies the color space type of a planar pixel reference. Required by PixelBasedConcept
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/// \ingroup PixelModelPlanarRef
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template <typename ChannelReference, typename ColorSpace>
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struct channel_mapping_type<planar_pixel_reference<ChannelReference,ColorSpace> > {
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typedef typename layout<ColorSpace>::channel_mapping_t type;
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};
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/// \brief Specifies that planar_pixel_reference represents a planar construct. Required by PixelBasedConcept
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/// \ingroup PixelModelPlanarRef
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template <typename ChannelReference, typename ColorSpace>
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struct is_planar<planar_pixel_reference<ChannelReference,ColorSpace> > : mpl::true_ {};
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/// \brief Specifies the color space type of a planar pixel reference. Required by HomogeneousPixelBasedConcept
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/// \ingroup PixelModelPlanarRef
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template <typename ChannelReference, typename ColorSpace>
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struct channel_type<planar_pixel_reference<ChannelReference,ColorSpace> > {
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typedef typename channel_traits<ChannelReference>::value_type type;
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};
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} } // namespace boost::gil
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namespace std {
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// We are forced to define swap inside std namespace because on some platforms (Visual Studio 8) STL calls swap qualified.
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// swap with 'left bias':
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// - swap between proxy and anything
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// - swap between value type and proxy
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// - swap between proxy and proxy
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// Having three overloads allows us to swap between different (but compatible) models of PixelConcept
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/// \brief swap for planar_pixel_reference
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/// \ingroup PixelModelPlanarRef
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template <typename CR, typename CS, typename R> inline
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void swap(const boost::gil::planar_pixel_reference<CR,CS> x, R& y) {
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boost::gil::swap_proxy<typename boost::gil::planar_pixel_reference<CR,CS>::value_type>(x,y);
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}
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/// \brief swap for planar_pixel_reference
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/// \ingroup PixelModelPlanarRef
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template <typename CR, typename CS> inline
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void swap(typename boost::gil::planar_pixel_reference<CR,CS>::value_type& x, const boost::gil::planar_pixel_reference<CR,CS> y) {
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boost::gil::swap_proxy<typename boost::gil::planar_pixel_reference<CR,CS>::value_type>(x,y);
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}
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/// \brief swap for planar_pixel_reference
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/// \ingroup PixelModelPlanarRef
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template <typename CR, typename CS> inline
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void swap(const boost::gil::planar_pixel_reference<CR,CS> x, const boost::gil::planar_pixel_reference<CR,CS> y) {
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boost::gil::swap_proxy<typename boost::gil::planar_pixel_reference<CR,CS>::value_type>(x,y);
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}
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} // namespace std
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#endif
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