Milena (Olena)
User documentation 2.0a Id
|
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_PIXTER2D_HH 00027 # define MLN_CORE_PIXTER2D_HH 00028 00032 00033 # include <mln/core/internal/pixel_iterator_base.hh> 00034 # include <mln/core/alias/point2d.hh> 00035 # include <mln/geom/size2d.hh> 00036 # include <mln/opt/at.hh> 00037 00038 namespace mln 00039 { 00040 00041 /*------------------. 00042 | fwd_pixter2d<I>. | 00043 `------------------*/ 00044 00046 template <typename I> 00047 class fwd_pixter2d 00048 : public internal::forward_pixel_iterator_base_< I, fwd_pixter2d<I> > 00049 { 00050 typedef internal::forward_pixel_iterator_base_< I, fwd_pixter2d<I> > super_; 00051 00052 public: 00054 typedef I image; 00055 00058 fwd_pixter2d(I& image); 00059 00061 void next_(); 00062 00064 void start_(); 00065 00066 private: 00067 00069 unsigned border_x2_; 00070 00072 unsigned row_offset_; 00073 00075 mln_qlf_value(I)* eor_; 00076 00077 using super_::image_; 00078 }; 00079 00080 00081 /*------------------. 00082 | bkd_pixter2d<I>. | 00083 `------------------*/ 00084 00086 template <typename I> 00087 class bkd_pixter2d 00088 : public internal::backward_pixel_iterator_base_< I, bkd_pixter2d<I> > 00089 { 00090 typedef internal::backward_pixel_iterator_base_< I, bkd_pixter2d<I> > super_; 00091 00092 public: 00094 typedef I image; 00095 00098 bkd_pixter2d(I& image); 00099 00101 void next_(); 00102 00104 void start_(); 00105 00106 private: 00107 00109 unsigned border_x2_; 00110 00112 unsigned row_offset_; 00113 00115 mln_qlf_value(I)* bor_; 00116 00117 using super_::image_; 00118 }; 00119 00120 00121 00122 #ifndef MLN_INCLUDE_ONLY 00123 00124 /*------------------. 00125 | fwd_pixter2d<I>. | 00126 `------------------*/ 00127 00128 template <typename I> 00129 inline 00130 fwd_pixter2d<I>::fwd_pixter2d(I& image) 00131 : super_(image), 00132 border_x2_(2 * image.border()), 00133 row_offset_(image.bbox().ncols() + border_x2_) 00134 { 00135 mln_precondition(image.is_valid()); 00136 mln_precondition(image_.is_valid()); 00137 mln_precondition(image_.buffer() == image.buffer()); 00138 } 00139 00140 template <typename I> 00141 inline 00142 void 00143 fwd_pixter2d<I>::next_() 00144 { 00145 ++this->value_ptr_; 00146 if (this->value_ptr_ == eor_ && this->value_ptr_ != this->eoi_) 00147 { 00148 this->value_ptr_ += border_x2_; 00149 eor_ += row_offset_; 00150 } 00151 } 00152 00153 template <typename I> 00154 inline 00155 void 00156 fwd_pixter2d<I>::start_() 00157 { 00158 mln_precondition(image_.is_valid()); 00159 eor_ = & opt::at(image_, geom::min_row(image_), geom::max_col(image_)) + 1; 00160 } 00161 00162 00163 /*------------------. 00164 | fwd_pixter2d<I>. | 00165 `------------------*/ 00166 00167 template <typename I> 00168 inline 00169 bkd_pixter2d<I>::bkd_pixter2d(I& image) 00170 : super_(image), 00171 border_x2_(2 * image.border()), 00172 row_offset_(image.bbox().ncols() + border_x2_) 00173 { 00174 mln_precondition(image.is_valid()); 00175 } 00176 00177 template <typename I> 00178 inline 00179 void 00180 bkd_pixter2d<I>::next_() 00181 { 00182 --this->value_ptr_; 00183 if (this->value_ptr_ == bor_ && this->value_ptr_ != this->boi_) 00184 { 00185 this->value_ptr_ -= border_x2_; 00186 bor_ -= row_offset_; 00187 } 00188 } 00189 00190 template <typename I> 00191 inline 00192 void 00193 bkd_pixter2d<I>::start_() 00194 { 00195 bor_ = & opt::at(image_, geom::max_row(image_), geom::min_col(image_)) - 1; 00196 } 00197 00198 #endif // ! MLN_INCLUDE_ONLY 00199 00200 } // end of namespace mln 00201 00202 #endif // ! MLN_CORE_PIXTER2D_HH