Image.cpp

#include "Image.h"
#include <iostream>
#include <cassert>
#include <fstream>

using namespace std;

Image::Image()
{
    tab = nullptr;
    dimx = 0;
    dimy = 0;
}

Image::Image(unsigned int x, unsigned int y)
{
    assert (x>0 && y>0);

    dimx = x;
    dimy = y;
    tab = new Pixel [dimx*dimy];
}

Image::~Image()
{
    dimx = 0;
    dimy = 0;
    delete [] tab;
    tab = NULL;
}


Pixel & Image::getPix(unsigned int x, unsigned int y) const
{
    assert (x>=0 && y>=0);

    return tab[y*dimx+x];;
}

Pixel Image::getPix2(unsigned int x, unsigned int y) const
{
    assert (x>=0 && y>=0); 

    Pixel ret = tab[y*dimx+x];

    return ret;
}

void Image::setPix(unsigned int x, unsigned int y, Pixel couleur)
{
    tab[y*dimx+x] = couleur;
}

void Image::dessinerRectangle(unsigned Xmin, unsigned int Ymin, unsigned int Xmax, unsigned int Ymax, Pixel couleur)
{
    unsigned i,j;

    for(i=Xmin;i<Xmax;i++)
    {
        for(j=Ymin;j<Ymax;j++)
        {
            setPix(i,j,couleur);

        }
    }
}

void Image::effacer (Pixel couleur)
{
    dessinerRectangle(0,0,dimx,dimy,couleur);
}

void Image::sauver(const string &filename) const
{
    ofstream fichier(filename.c_str());
    assert(fichier.is_open());
    fichier << "P3" << endl;
    fichier << dimx << " " << dimy << endl;
    fichier << "255" << endl;
    for (unsigned int y = 0; y < dimy; y++)
        for (unsigned int x = 0; x < dimx; x++)
        {
            Pixel &pix = getPix(x, y);
            fichier << pix.r << " " << pix.g << " " << pix.b << " ";
            //cout<<x<<" , "<<y<<endl;
        }
    cout << "Sauvegarde de l'image " << filename << " ... OK\n";
    fichier.close();
}

void Image::ouvrir(const string &filename)
{
    ifstream fichier(filename.c_str());
    assert(fichier.is_open());
    unsigned char r, g, b;
    string mot;
    dimx = dimy = 0;
    fichier >> mot >> dimx >> dimy >> mot;
    cout<<dimx<<","<<dimy<<endl;
    assert(dimx > 0 && dimy > 0);
    if (tab != nullptr)
        delete[] tab;
    tab = new Pixel[dimx * dimy];
    for (unsigned int y = 0; y < dimy; y++)
        for (unsigned int x = 0; x < dimx; x++)
        {
            fichier >> r >> g >> b;
            //cout<<r<<" , "<<g<<" , "<<b<<endl;
            getPix(x, y).r = r;
            getPix(x, y).g = g;
            getPix(x, y).b = b;
        }
    fichier.close();
    cout << "Lecture de l'image " << filename << " ... OK\n";
}

void Image::afficherConsole()
{
    cout << dimx << " " << dimy << endl;
    for (unsigned int y = 0; y < dimy; ++y)
    {
        for (unsigned int x = 0; x < dimx; ++x)
        {
            Pixel &pix = getPix(x, y);
            cout << pix.r << " " << pix.g << " " << pix.b << " ";
        }
        cout << endl;
    }
}

Pixel * Image::getTab()const
{
    return tab;
}