#include "Image.H"
#include "iostream.h"
#include "fstream.h"

Image::Image() { 
	xdim = 0;
	ydim = 0;
}

Image::Image(int x, int y) { 
	xdim = x;
	ydim = y;
	pixels.resize(x*y*3);
	for (int i = 0; i < x*y*3; i++)
		pixels[i] = 255;
}

Image::Image(const Image & s) 
{
	xdim = s.xdim; ydim = s.ydim;
	pixels.resize(s.xdim*s.ydim*3);
	pixels = s.pixels;
}

Image::~Image() {
}

Image &
Image::operator =(const Image & s) { 
	return * this;
}


void Image::rect(int x1,int y1,int x2,int y2) {
	int xmin, xmax, ymin, ymax;
	xmin = (x1< x2) ? x1 : x2;
	xmax = (x1< x2) ? x2 : x1;
	ymin = (y1< y2) ? y1 : y2;
	ymax = (y1< y2) ? y2 : y1;
	for (int x = xmin; x <= xmax; x++){
	    setPixel(x, ymin);
	    setPixel(x, ymax);
	    }
	for (int y = ymin; y <= ymax; y++){
	    setPixel(xmin, y);
	    setPixel(xmax, y);
	    }
}


void Image::setPixel(int x, int y) {
	if ((x >= xdim) || (y >= ydim)) return;
	pixels[(y*xdim + x)*3] = 0;
	pixels[(y*xdim + x)*3+1] = 0;
	pixels[(y*xdim + x)*3+2] = 0;
}

void Image::writePPM( char *filename) const {
	ofstream ofs;
	ofs.open(filename);
	ofs << "P3 " << xdim << " " << ydim << " 255" << endl;
	for (int i = 0; i < xdim*ydim ; i++ ){
	    ofs << pixels[i*3] << " " << pixels[i*3+1] << " ";
	    ofs << pixels[i*3+2] << endl;
	    }
	ofs.close();
}