planar_pixel_reference.hppGo to the documentation of this file.00001 /* 00002 Copyright 2005-2007 Adobe Systems Incorporated 00003 00004 Use, modification and distribution are subject to the Boost Software License, 00005 Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at 00006 http://www.boost.org/LICENSE_1_0.txt). 00007 00008 See http://opensource.adobe.com/gil for most recent version including documentation. 00009 */ 00010 00011 /*************************************************************************************************/ 00012 00013 #ifndef GIL_PLANAR_REF_H 00014 #define GIL_PLANAR_REF_H 00015 00024 00025 #include <boost/mpl/range_c.hpp> 00026 #include "gil_config.hpp" 00027 #include "gil_concept.hpp" 00028 #include "color_base.hpp" 00029 #include "channel.hpp" 00030 #include "pixel.hpp" 00031 #include "planar_pixel_iterator.hpp" 00032 00033 namespace boost { namespace gil { 00034 00039 00043 00044 00050 template <typename ChannelReference, typename ColorSpace> // ChannelReference is a channel reference (const or mutable) 00051 struct planar_pixel_reference 00052 : public detail::homogeneous_color_base<ChannelReference,layout<ColorSpace>,mpl::size<ColorSpace>::value> { 00053 typedef detail::homogeneous_color_base<ChannelReference,layout<ColorSpace>,mpl::size<ColorSpace>::value> parent_t; 00054 private: 00055 // These three are only defined for homogeneous pixels 00056 typedef typename channel_traits<ChannelReference>::value_type channel_t; 00057 typedef typename channel_traits<ChannelReference>::const_reference channel_const_reference; 00058 public: 00059 BOOST_STATIC_CONSTANT(bool, is_mutable = channel_traits<ChannelReference>::is_mutable); 00060 typedef pixel<channel_t,layout<ColorSpace> > value_type; 00061 typedef planar_pixel_reference reference; 00062 typedef planar_pixel_reference<channel_const_reference,ColorSpace> const_reference; 00063 00064 planar_pixel_reference(ChannelReference v0, ChannelReference v1) : parent_t(v0,v1) {} 00065 planar_pixel_reference(ChannelReference v0, ChannelReference v1, ChannelReference v2) : parent_t(v0,v1,v2) {} 00066 planar_pixel_reference(ChannelReference v0, ChannelReference v1, ChannelReference v2, ChannelReference v3) : parent_t(v0,v1,v2,v3) {} 00067 planar_pixel_reference(ChannelReference v0, ChannelReference v1, ChannelReference v2, ChannelReference v3, ChannelReference v4) : parent_t(v0,v1,v2,v3,v4) {} 00068 planar_pixel_reference(ChannelReference v0, ChannelReference v1, ChannelReference v2, ChannelReference v3, ChannelReference v4, ChannelReference v5) : parent_t(v0,v1,v2,v3,v4,v5) {} 00069 00070 template <typename P> planar_pixel_reference(const P& p) : parent_t(p) { check_compatible<P>();} 00071 00072 // PERFORMANCE_CHECK: Is this constructor necessary? 00073 template <typename ChannelV, typename Mapping> 00074 planar_pixel_reference(pixel<ChannelV,layout<ColorSpace,Mapping> >& p) : parent_t(p) { check_compatible<pixel<ChannelV,layout<ColorSpace,Mapping> > >();} 00075 00076 // Construct at offset from a given location 00077 template <typename ChannelPtr> planar_pixel_reference(const planar_pixel_iterator<ChannelPtr,ColorSpace>& p, std::ptrdiff_t diff) : parent_t(p,diff) {} 00078 00079 const planar_pixel_reference& operator=(const planar_pixel_reference& p) const { static_copy(p,*this); return *this; } 00080 template <typename P> const planar_pixel_reference& operator=(const P& p) const { check_compatible<P>(); static_copy(p,*this); return *this; } 00081 00082 template <typename P> bool operator==(const P& p) const { check_compatible<P>(); return static_equal(*this,p); } 00083 template <typename P> bool operator!=(const P& p) const { return !(*this==p); } 00084 00085 ChannelReference operator[](std::size_t i) const { return this->at_c_dynamic(i); } 00086 00087 const planar_pixel_reference* operator->() const { return this; } 00088 private: 00089 template <typename Pixel> static void check_compatible() { gil_function_requires<PixelsCompatibleConcept<Pixel,planar_pixel_reference> >(); } 00090 }; 00091 00093 // ColorBasedConcept 00095 00096 template <typename ChannelReference, typename ColorSpace, int K> 00097 struct kth_element_type<planar_pixel_reference<ChannelReference,ColorSpace>, K> { 00098 typedef ChannelReference type; 00099 }; 00100 00101 template <typename ChannelReference, typename ColorSpace, int K> 00102 struct kth_element_reference_type<planar_pixel_reference<ChannelReference,ColorSpace>, K> { 00103 typedef ChannelReference type; 00104 }; 00105 00106 template <typename ChannelReference, typename ColorSpace, int K> 00107 struct kth_element_const_reference_type<planar_pixel_reference<ChannelReference,ColorSpace>, K> 00108 : public add_reference<typename add_const<ChannelReference>::type> 00109 { 00110 // typedef typename channel_traits<ChannelReference>::const_reference type; 00111 }; 00112 00114 // PixelConcept 00116 00119 template <typename ChannelReference, typename ColorSpace> 00120 struct is_pixel< planar_pixel_reference<ChannelReference,ColorSpace> > : public mpl::true_{}; 00121 00123 // HomogeneousPixelBasedConcept 00125 00128 template <typename ChannelReference, typename ColorSpace> 00129 struct color_space_type<planar_pixel_reference<ChannelReference,ColorSpace> > { 00130 typedef ColorSpace type; 00131 }; 00132 00135 template <typename ChannelReference, typename ColorSpace> 00136 struct channel_mapping_type<planar_pixel_reference<ChannelReference,ColorSpace> > { 00137 typedef typename layout<ColorSpace>::channel_mapping_t type; 00138 }; 00139 00142 template <typename ChannelReference, typename ColorSpace> 00143 struct is_planar<planar_pixel_reference<ChannelReference,ColorSpace> > : mpl::true_ {}; 00144 00147 template <typename ChannelReference, typename ColorSpace> 00148 struct channel_type<planar_pixel_reference<ChannelReference,ColorSpace> > { 00149 typedef typename channel_traits<ChannelReference>::value_type type; 00150 }; 00151 00152 } } // namespace boost::gil 00153 00154 namespace std { 00155 // We are forced to define swap inside std namespace because on some platforms (Visual Studio 8) STL calls swap qualified. 00156 // swap with 'left bias': 00157 // - swap between proxy and anything 00158 // - swap between value type and proxy 00159 // - swap between proxy and proxy 00160 // Having three overloads allows us to swap between different (but compatible) models of PixelConcept 00161 00164 template <typename CR, typename CS, typename R> inline 00165 void swap(boost::gil::planar_pixel_reference<CR,CS> x, R& y) { 00166 boost::gil::swap_proxy<typename boost::gil::planar_pixel_reference<CR,CS>::value_type>(x,y); 00167 } 00168 00169 00172 template <typename CR, typename CS> inline 00173 void swap(typename boost::gil::planar_pixel_reference<CR,CS>::value_type& x, boost::gil::planar_pixel_reference<CR,CS> y) { 00174 boost::gil::swap_proxy<typename boost::gil::planar_pixel_reference<CR,CS>::value_type>(x,y); 00175 } 00176 00177 00180 template <typename CR, typename CS> inline 00181 void swap(boost::gil::planar_pixel_reference<CR,CS> x, boost::gil::planar_pixel_reference<CR,CS> y) { 00182 boost::gil::swap_proxy<typename boost::gil::planar_pixel_reference<CR,CS>::value_type>(x,y); 00183 } 00184 } // namespace std 00185 00186 #endif Generated on Thu Nov 8 21:53:17 2007 for Generic Image Library by 1.4.4 |