xbm_writer.cpp

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00001 /*
00002   CLAW - a C++ Library Absolutely Wonderful
00003 
00004   CLAW is a free library without any particular aim but being useful to 
00005   anyone.
00006 
00007   Copyright (C) 2005-2008 Julien Jorge
00008 
00009   This library is free software; you can redistribute it and/or
00010   modify it under the terms of the GNU Lesser General Public
00011   License as published by the Free Software Foundation; either
00012   version 2.1 of the License, or (at your option) any later version.
00013 
00014   This library is distributed in the hope that it will be useful,
00015   but WITHOUT ANY WARRANTY; without even the implied warranty of
00016   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017   Lesser General Public License for more details.
00018 
00019   You should have received a copy of the GNU Lesser General Public
00020   License along with this library; if not, write to the Free Software
00021   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00022 
00023   contact: julien_jorge@yahoo.fr
00024 */
00030 #include <claw/xbm.hpp>
00031 #include <iomanip>
00032 
00033 /*----------------------------------------------------------------------------*/
00037 claw::graphic::xbm::writer::options::options()
00038   : name("noname"), hot(NULL)
00039 {
00040 
00041 } // xbm::writer::options::options()
00042 
00043 /*----------------------------------------------------------------------------*/
00049 claw::graphic::xbm::writer::options::options
00050 ( const std::string& n, const claw::math::coordinate_2d<int>* h )
00051   : name(n), hot(h)
00052 {
00053 
00054 } // xbm::writer::options::options()
00055 
00056 
00057 
00058 
00059 /*----------------------------------------------------------------------------*/
00064 claw::graphic::xbm::writer::writer( const image& img )
00065   : m_image( img )
00066 {
00067 
00068 } // xbm::writer::writer()
00069 
00070 /*----------------------------------------------------------------------------*/
00077 claw::graphic::xbm::writer::writer
00078 ( const image& img, std::ostream& f, const options& opt )
00079   : m_image( img )
00080 {
00081   save(f, opt);
00082 } // xbm::writer::writer()
00083 
00084 /*----------------------------------------------------------------------------*/
00090 void
00091 claw::graphic::xbm::writer::save( std::ostream& f, const options& opt ) const
00092 {
00093   CLAW_PRECOND( !!f );
00094 
00095   f << "#define " << opt.name << "_width " << m_image.width() << "\n";
00096   f << "#define " << opt.name << "_height " << m_image.height() << "\n";
00097 
00098   if ( opt.hot != NULL )
00099     {
00100       f << "#define " << opt.name << "_x_hot " << opt.hot->x << "\n";
00101       f << "#define " << opt.name << "_y_hot " << opt.hot->y << "\n";
00102     }
00103 
00104   f << "static unsigned char " << opt.name << "_bits[] = {\n ";
00105 
00106   save_bits(f);
00107 } // xbm::writer::save()
00108 
00109 /*----------------------------------------------------------------------------*/
00114 void claw::graphic::xbm::writer::save_bits( std::ostream& f ) const
00115 {
00116   const unsigned int max_per_line = (80 - 1) / 6;
00117   const unsigned int nb_pxl = m_image.width() * m_image.height();
00118 
00119   unsigned int pxl_count = 0;
00120   unsigned int per_line = 0;
00121 
00122   for (unsigned int y=0; y!=m_image.height(); ++y)
00123     {
00124       unsigned int x=0;
00125 
00126       while ( x!=m_image.width() )
00127         {
00128           unsigned int v(0);
00129           unsigned int bits;
00130 
00131           for ( bits=0; (x!=m_image.width()) && (bits != 8);
00132                 ++bits, ++x, ++pxl_count )
00133             {
00134               v >>= 1;
00135               if ( m_image[y][x].luminosity() <= 127 )
00136                 v |= 0x80;
00137             }
00138 
00139           v >>= 8 - bits;
00140 
00141           ++per_line;
00142 
00143           f << " 0x" << std::setw(2) << std::setfill('0') << std::hex << v;
00144 
00145           if ( pxl_count != nb_pxl )
00146             {
00147               f  << ",";
00148 
00149               if ( per_line == max_per_line )
00150                 {
00151                   f << "\n ";
00152                   per_line = 0;
00153                 }
00154             }
00155         }
00156     }
00157 
00158   f << "};" << std::endl;
00159 } // xbm::writer::save()

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