Milena (Olena)
User documentation 2.0a Id
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00001 // Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE) 00002 // 00003 // This file is part of Olena. 00004 // 00005 // Olena is free software: you can redistribute it and/or modify it under 00006 // the terms of the GNU General Public License as published by the Free 00007 // Software Foundation, version 2 of the License. 00008 // 00009 // Olena is distributed in the hope that it will be useful, 00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00012 // General Public License for more details. 00013 // 00014 // You should have received a copy of the GNU General Public License 00015 // along with Olena. If not, see <http://www.gnu.org/licenses/>. 00016 // 00017 // As a special exception, you may use this file as part of a free 00018 // software project without restriction. Specifically, if other files 00019 // instantiate templates or use macros or inline functions from this 00020 // file, or you compile this file and link it with other files to produce 00021 // an executable, this file does not by itself cause the resulting 00022 // executable to be covered by the GNU General Public License. This 00023 // exception does not however invalidate any other reasons why the 00024 // executable file might be covered by the GNU General Public License. 00025 00026 #ifndef MLN_CORE_INTERNAL_PIXEL_ITERATOR_BASE_HH 00027 # define MLN_CORE_INTERNAL_PIXEL_ITERATOR_BASE_HH 00028 00032 00033 # include <mln/core/concept/pixel_iterator.hh> 00034 # include <mln/core/internal/pixel_impl.hh> 00035 # include <mln/core/trait/qlf_value.hh> 00036 00037 00038 namespace mln 00039 { 00040 00041 namespace internal 00042 { 00043 00044 /*---------------------------------------. 00045 | internal::pixel_iterator_base_<I, E>. | 00046 `---------------------------------------*/ 00047 00049 template <typename I, typename E> 00050 class pixel_iterator_base_ : public Pixel_Iterator<E>, 00051 public internal::pixel_impl_<I, E> 00052 { 00053 typedef internal::pixel_impl_<I, E> super_; 00054 00055 protected: 00057 pixel_iterator_base_(I& image); 00058 00059 protected: 00060 00062 mln_qlf_value(I)* boi_; 00063 00065 mln_qlf_value(I)* eoi_; 00066 00068 void start_(); 00069 }; 00070 00071 00072 /*-----------------------------------------------. 00073 | internal::forward_pixel_iterator_base_<I, E>. | 00074 `-----------------------------------------------*/ 00075 00077 template <typename I, typename E> 00078 class forward_pixel_iterator_base_ : public pixel_iterator_base_<I, E> 00079 { 00080 typedef pixel_iterator_base_<I, E> super_; 00081 00082 public: 00083 00087 void start(); 00089 void invalidate(); 00091 bool is_valid() const; 00093 00094 protected: 00095 00097 forward_pixel_iterator_base_(I& image); 00098 }; 00099 00100 00101 /*------------------------------------------------. 00102 | internal::backward_pixel_iterator_base_<I, E>. | 00103 `------------------------------------------------*/ 00104 00106 template <typename I, typename E> 00107 class backward_pixel_iterator_base_ : public pixel_iterator_base_<I, E> 00108 { 00109 typedef pixel_iterator_base_<I, E> super_; 00110 00111 public: 00115 void start(); 00117 void invalidate(); 00119 bool is_valid() const; 00121 00122 protected: 00123 00125 backward_pixel_iterator_base_(I& image); 00126 }; 00127 00128 00129 00130 #ifndef MLN_INCLUDE_ONLY 00131 00132 00133 /*---------------------------------------. 00134 | internal::pixel_iterator_base_<I, E>. | 00135 `---------------------------------------*/ 00136 00137 template <typename I, typename E> 00138 inline 00139 pixel_iterator_base_<I, E>::pixel_iterator_base_(I& image) 00140 : super_(image) 00141 { 00142 mln_precondition(image.is_valid()); 00143 I& ima = this->image_; 00144 boi_ = & ima( ima.domain().pmin() ) - 1; 00145 eoi_ = & ima( ima.domain().pmax() ) + 1; 00146 exact(*this).invalidate(); 00147 } 00148 00149 template <typename I, typename E> 00150 inline 00151 void 00152 pixel_iterator_base_<I, E>::start_() 00153 { 00154 // Default impl is no-op. 00155 } 00156 00157 00158 /*-----------------------------------------------. 00159 | internal::forward_pixel_iterator_base_<I, E>. | 00160 `-----------------------------------------------*/ 00161 00162 template <typename I, typename E> 00163 inline 00164 forward_pixel_iterator_base_<I, E>::forward_pixel_iterator_base_(I& image) 00165 : super_(image) 00166 { 00167 } 00168 00169 template <typename I, typename E> 00170 inline 00171 void 00172 forward_pixel_iterator_base_<I, E>::start() 00173 { 00174 this->value_ptr_ = this->boi_ + 1; 00175 exact(this)->start_(); 00176 } 00177 00178 template <typename I, typename E> 00179 inline 00180 void 00181 forward_pixel_iterator_base_<I, E>::invalidate() 00182 { 00183 this->value_ptr_ = this->eoi_; 00184 } 00185 00186 template <typename I, typename E> 00187 inline 00188 bool 00189 forward_pixel_iterator_base_<I, E>::is_valid() const 00190 { 00191 return this->value_ptr_ != this->eoi_; 00192 } 00193 00194 00195 /*------------------------------------------------. 00196 | internal::backward_pixel_iterator_base_<I, E>. | 00197 `------------------------------------------------*/ 00198 00199 template <typename I, typename E> 00200 inline 00201 backward_pixel_iterator_base_<I, E>::backward_pixel_iterator_base_(I& image) 00202 : super_(image) 00203 { 00204 } 00205 00206 template <typename I, typename E> 00207 inline 00208 void 00209 backward_pixel_iterator_base_<I, E>::start() 00210 { 00211 this->value_ptr_ = this->eoi_ - 1; 00212 exact(this)->start_(); 00213 } 00214 00215 template <typename I, typename E> 00216 inline 00217 void 00218 backward_pixel_iterator_base_<I, E>::invalidate() 00219 { 00220 this->value_ptr_ = this->boi_; 00221 } 00222 00223 template <typename I, typename E> 00224 inline 00225 bool 00226 backward_pixel_iterator_base_<I, E>::is_valid() const 00227 { 00228 return this->value_ptr_ != this->boi_; 00229 } 00230 00231 #endif // ! MLN_INCLUDE_ONLY 00232 00233 } // end of namespace internal 00234 00235 } // end of namespace mln 00236 00237 00238 #endif // ! MLN_CORE_INTERNAL_PIXEL_ITERATOR_BASE_HH