Milena (Olena)
User documentation 2.0a Id
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00001 // Copyright (C) 2007, 2008, 2009, 2010 EPITA Research and Development 00002 // Laboratory (LRDE) 00003 // 00004 // This file is part of Olena. 00005 // 00006 // Olena is free software: you can redistribute it and/or modify it under 00007 // the terms of the GNU General Public License as published by the Free 00008 // Software Foundation, version 2 of the License. 00009 // 00010 // Olena is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 // General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU General Public License 00016 // along with Olena. If not, see <http://www.gnu.org/licenses/>. 00017 // 00018 // As a special exception, you may use this file as part of a free 00019 // software project without restriction. Specifically, if other files 00020 // instantiate templates or use macros or inline functions from this 00021 // file, or you compile this file and link it with other files to produce 00022 // an executable, this file does not by itself cause the resulting 00023 // executable to be covered by the GNU General Public License. This 00024 // exception does not however invalidate any other reasons why the 00025 // executable file might be covered by the GNU General Public License. 00026 00027 #ifndef MLN_CANVAS_BROWSING_DIAGONAL2D_HH 00028 # define MLN_CANVAS_BROWSING_DIAGONAL2D_HH 00029 00033 00034 # include <mln/core/concept/browsing.hh> 00035 # include <mln/core/concept/image.hh> 00036 00037 namespace mln 00038 { 00039 00040 namespace canvas 00041 { 00042 00043 namespace browsing 00044 { 00045 00047 00082 struct diagonal2d_t : public Browsing< diagonal2d_t > 00083 { 00084 // This default constructor is needed for compilation with gcc 00085 // 4.6.0, gcc 4.6.1 and Clang. 00086 diagonal2d_t(); 00087 00088 template <typename F> 00089 void operator()(F& f) const; 00090 }; 00091 00092 extern const diagonal2d_t diagonal2d; 00093 00094 # ifndef MLN_INCLUDE_ONLY 00095 00096 # ifndef MLN_WO_GLOBAL_VARS 00097 00098 const diagonal2d_t diagonal2d; 00099 00100 # endif // ! MLN_WO_GLOBAL_VARS 00101 00102 inline 00103 diagonal2d_t::diagonal2d_t() 00104 { 00105 } 00106 00107 00108 template <typename F> 00109 inline 00110 void 00111 diagonal2d_t::operator()(F& f) const 00112 { 00113 trace::entering("canvas::browsing::diagonal2d"); 00114 00115 typedef typename F::I I; 00116 typedef mln_deduce(I, psite, delta) dpsite; 00117 typedef mln_psite(I) psite; 00118 00119 // Directions 00120 dpsite dp_first(1, 0); 00121 dpsite dp_second(0, 1); 00122 dpsite dp_diag(-1, 1); 00123 00124 mln_deduce(I, psite, delta) diag; 00125 00126 psite 00127 pmin = f.input.domain().pmin(), 00128 pmax = f.input.domain().pmax(); 00129 00130 f.p = pmin; 00131 00132 f.init(); 00133 00134 while (f.input.domain().has(f.p)) 00135 { 00136 psite start_diag = f.p; 00137 // Browse one diag. 00138 f.init_diag(); 00139 while (f.input.domain().has(f.p)) 00140 { 00141 f.next(); 00142 f.p = f.p + dp_diag; 00143 } 00144 00145 // Goto next diag start. 00146 f.p = start_diag + dp_first; 00147 } 00148 f.p = f.p - dp_first; 00149 00150 f.p = f.p + dp_second; 00151 while (f.input.domain().has(f.p)) 00152 { 00153 psite start_diag = f.p; 00154 00155 // Browse one diag. 00156 f.init_diag(); 00157 while (f.input.domain().has(f.p)) 00158 { 00159 f.next(); 00160 f.p = f.p + dp_diag; 00161 } 00162 f.p = f.p - dp_diag; 00163 00164 // Goto next diag start. 00165 f.p = start_diag + dp_second; 00166 } 00167 00168 f.final(); 00169 trace::exiting("canvas::browsing::diagonal2d"); 00170 } 00171 00172 # endif // ! MLN_INCLUDE_ONLY 00173 00174 } // end of namespace mln::canvas::browsing 00175 00176 } // end of namespace mln::canvas 00177 00178 } // end of namespace mln 00179 00180 #endif // ! MLN_CANVAS_BROWSING_DIAGONAL2D_HH