Image.cxx

   1 #include <cassert>
   2 #include <fstream>
   3 #include <iostream>
   4
   5 #include "Image.hxx"
   6
   7 Image::Image(int resX, int resY)
   8 :
   9   m_resX(resX),
  10   m_resY(resY)
  11 {
  12   assert (resX > 0 && resY > 0);
  13   std::cerr << "(Image): ResX = " << m_resX << ", resY = " << m_resY << std::endl;
  14   m_pixel = new Vec3f[m_resX*m_resY];
  15 }
  16
  17 Image::~Image()
  18 {
  19   delete [] m_pixel;
  20 }
  21
  22 Image::Image()
  23 {
  24 }
  25
  26 Image::Image(const Image& o)
  27 {
  28   operator=(o);
  29 }
  30
  31 Image&
  32 Image::operator=(const Image& o)
  33 {
  34   return *this;
  35 }
  36
  37 Vec3f&
  38 Image::operator()(int x, int y)
  39 {
  40   assert(x >= 0 && x < m_resX);
  41   assert(y >= 0 && y < m_resY);
  42
  43   return m_pixel[y*m_resX+x];
  44 }
  45
  46 void Image::WritePPM(const std::string& fileName)
  47 {
  48   std::cerr << "(Image): Writing to file " << fileName << std::endl;
  49   std::ofstream file(fileName.c_str());
  50
  51   if(!file.is_open())
  52     {
  53       std::cerr << "(Image): Could not open file " << fileName << std::endl;
  54       return;
  55     }
  56
  57   file << "P3" << std::endl;
  58   file << m_resX << " " << m_resY << " " << 255 << std::endl;
  59   for (int y=m_resY-1;y>=0;y--)
  60     {
  61       for (int x=0;x<m_resX;x++)
  62         {
  63           file
  64             << (int)(255.99999999 * (*this)(x,y)[0]) << " "
  65             << (int)(255.99999999 * (*this)(x,y)[1]) << " "
  66             << (int)(255.99999999 * (*this)(x,y)[2]) << " "
  67             << "\t";
  68         }
  69       file << std::endl;
  70       file << std::flush;
  71     }
  72   file.close();
  73  }