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 #include <mln/core/image/image2d.hh> 00028 #include <mln/win/rectangle2d.hh> 00029 00030 #include <mln/value/rgb8.hh> 00031 00032 #include <mln/io/ppm/load.hh> 00033 #include <mln/io/ppm/save.hh> 00034 00035 #include <mln/data/compare.hh> 00036 00037 #include "tests/data.hh" 00038 00039 00040 using namespace mln; 00041 00042 typedef value::rgb<23> rgb23; 00043 00044 struct to23bits : mln::Function_v2v<to23bits> 00045 { 00046 00047 typedef rgb23 result; 00048 result operator()(value::rgb8 v) const 00049 { 00050 result ret(v.red().to_enc() * 256, 00051 v.green().to_enc() * 256, 00052 v.blue().to_enc() * 256); 00053 return ret; 00054 } 00055 }; 00056 00057 struct to8bits : mln::Function_v2v<to8bits> 00058 { 00059 00060 typedef value::rgb8 result; 00061 result operator()(rgb23 v) const 00062 { 00063 result ret(v.red().to_enc() / 256, 00064 v.green().to_enc() / 256, 00065 v.blue().to_enc() / 256); 00066 return ret; 00067 } 00068 }; 00069 00070 int main() 00071 { 00072 using namespace mln; 00073 using value::rgb8; 00074 00075 typedef image2d<rgb8> I; 00076 00077 00078 // load a 8-bit image A 00079 image2d<rgb8> a = io::ppm::load<rgb8>(MLN_IMG_DIR "/lena.ppm"); 00080 image2d<rgb23> b(a.domain()); 00081 00082 image2d<rgb8>::fwd_piter p(b.domain()); 00083 00084 // save it as a 23-bit ppm image B 00085 to23bits f; 00086 for_all(p) 00087 b(p) = f(a(p)); 00088 io::ppm::save(b, "ppm23-out23.ppm"); 00089 00090 // reload B into C 00091 image2d<rgb23> 00092 c = io::ppm::load<rgb23>("ppm23-out23.ppm"); 00093 image2d<rgb8> d(a.domain()); 00094 00095 00096 // save C as a 8-bit ppm image D 00097 to8bits g; 00098 for_all(p) 00099 d(p) = g(c(p)); 00100 io::ppm::save(d, "ppm23-out8.ppm"); 00101 00102 // D shall equal A 00103 mln_assertion(d == a); 00104 00105 }