// Pixel.cpp       Dave Reed
//
// implementations of the classes in the Pixel hierarchy
/////////////////////////////////////////////////////////////////

#include <iostream>
#include "Pixel.h"
using namespace std;

MonoPixel::MonoPixel()
{
    pixValue = 0;
}

void MonoPixel::Invert() 
{
    pixValue = 1 - pixValue;
}

void MonoPixel::Read(istream & istr)
{
    istr >> pixValue;
}

void MonoPixel::Write(ostream & ostr)
{
    ostr << pixValue;
}

//////////////////////////////////////////////////////////

GrayPixel::GrayPixel(int max)
{
    pixValue = 1;
    maxValue = max;
}

void GrayPixel::Invert() 
{
    pixValue = maxValue - pixValue;
}

void GrayPixel::Read(istream & istr)
{
    istr >> pixValue;
}

void GrayPixel::Write(ostream & ostr)
{
    ostr << pixValue;
}

//////////////////////////////////////////////////////////////

ColorPixel::ColorPixel(int max)
{
    redValue = 1;
    greenValue = 1;
    blueValue = 1;
    maxValue = max;
}

void ColorPixel::Invert() 
{
    redValue = maxValue - redValue;
    greenValue = maxValue - greenValue;
    blueValue = maxValue - blueValue;
}

void ColorPixel::Read(istream & istr)
{
    istr >> redValue >> greenValue >> blueValue;
}

void ColorPixel::Write(ostream & ostr)
{
    ostr << redValue << " " << greenValue << " " << blueValue;
}