testGrayLevelImage2D.cpp

#include <iostream>
#include <fstream>
#include "GrayLevelImage2D.hpp"
 
using namespace std;
 
int main( int argc, char** argv )
{
  {
    //! [tgli2d-sec3]
    GrayLevelImage2D img( 8, 8, 5 ); // imagette 8x8 remplie de 5
    for ( int y = 0; y < img.h(); ++y )
      for ( int x = 0; x < img.w(); ++x )
        std::cout << " " << (int) img.at( x, y ); // la conversion permet de voir les caractères sous forme d'entiers.
    std::cout << std::endl;
    //! [tgli2d-sec3]
  }
  {
    GrayLevelImage2D img( 8, 8, 5 ); // imagette 8x8 remplie de 5
    //! [tgli2d-sec4]
    for ( GrayLevelImage2D::Iterator it = img.begin(), itE = img.end(); it != itE; ++it )
        std::cout << " " << (int) *it; // la conversion permet de voir les caractères sous forme d'entiers.
    //! [tgli2d-sec4]
  }
 
  typedef GrayLevelImage2D::GrayLevel GrayLevel;
  typedef GrayLevelImage2D::Iterator  Iterator;
  GrayLevelImage2D img;
  ifstream input( argv[1] );
  try {
    img.importPGM( input );
  }
  catch ( char const * msg ) {
    std::cerr << "Exception: " << msg << std::endl;
  }
  catch (...) {
    std::cerr << "Exception." << std::endl;
  }
  input.close();
  for ( Iterator it = img.begin(), itE = img.end(); it != itE; ++it )
    {
      const GrayLevel g = (13*((int)(*it))) % 256;
      *it = g;
    }
  ofstream output( argv[2] );
  img.exportPGM( output, false );
  output.close();
  std::cout << std::endl;
  return 0;
}