import java.awt.*;
import java.awt.image.*;
import javax.swing.*;

public class OFImage extends BufferedImage {
    public OFImage(BufferedImage image) {
        // TODO Auto-generated constructor stub
        super(image.getColorModel(), image.copyData(null), image.isAlphaPremultiplied(), null);
    }
    public OFImage(int width, int height)
    {
        super(width, height, TYPE_INT_RGB);
    }

    public void setPixel(int x, int y, Color col)
    {
        int pixel = col.getRGB();
        setRGB(x,y,pixel);
    }

    public Color getPixel(int x, int y)
    {
        int pixel = getRGB(x, y);
        return new Color(pixel);
    }

    public void darker()
    {
        int height = getHeight(), width = getWidth();
        for (int y = 0; y < height; y++)
        {
            for (int x = 0; x < width; x++)
            {
                setPixel(x, y, getPixel(x, y).darker());
            }
        }
    }
    public void lighter()
    {
        int height = getHeight(), width = getWidth();
        for (int y = 0; y < height; y++)
        {
            for (int x = 0; x < width; x++)
            {
                setPixel(x, y, getPixel(x, y).brighter());
            }
        }
    }
    public void threshold()
    {
        int height = getHeight(), width = getWidth();
        for (int y = 0; y < height; y++)
        {
            for (int x = 0; x < width; x++)
            {
                Color pixel = getPixel(x, y);
                int brightness = (pixel.getRed() + pixel.getGreen() + pixel.getBlue()) / 3;
                if(brightness <= 85)
                {
                    setPixel(x, y, Color.BLACK);
                }
                else if (brightness <= 170)
                {
                    setPixel(x, y, Color.GRAY);
                }
                else
                {
                    setPixel(x, y, Color.WHITE);
                }

            }
        }
    }
}