#include <math.h>
#include <iostream>
#include <stdlib.h>


#include <vector>


#include "defs.h"
#include "functions.h"


/* ----------- functionality of image class ---------- */

image::image ( int m, int n ) : xsize(m), ysize(n)
{
    rgb = new RGB[m*n];
}

/* ----------------------- */

RGB &image::pixel ( int i, int j )
{
    return rgb[i+xsize*j];
}

/* ----------------------- */

int clampnround ( double x )
{
    if (x>255)
        x = 255;
    if (x<0) 
        x = 0;
    return (int)floor(x+.5);
}

ostream &operator<< ( ostream &ofs, RGB c )
{
    int rgb[3];
    rgb[0] = clampnround(255*c.r);
    rgb[1] = clampnround(255*c.g);
    rgb[2] = clampnround(255*c.b);
    ofs << rgb[0] << " " << rgb[1] << " " << rgb[2] << endl;
    return ofs;
}

ostream &operator<< ( ostream &ofs, image i )
{
    int x,y;

    ofs << "P3" << endl;
    ofs << i.xsize << " " << i.ysize << endl;
    ofs << "255" << endl;
    for ( y=i.ysize-1; y>=0; y-- )
        for ( x=0; x<i.xsize; x++ )
            ofs << i.pixel(x,y);
    return ofs;
}

/* -------- </image class> --------*/