OFImage

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

/**
 * OFImage is a class that defines an image in OF (Objects First) format.
 *
 * @author Ahmad Lamaul Farid
 * @version 9 Desember 2020
 */

public class OFImage extends BufferedImage
{
    /**
    * Create an OFImage copied from a BufferedImage.
    * @param image The image to copy.
    */
    public OFImage(BufferedImage image)
    {
        super(image.getColorModel(), image.copyData(null), image.isAlphaPremultiplied(), null);
    }

    /**
    * Create an OFImage with specified size and unspecified content.
    * @param width The width of the image.
    * @param height The height of the image.
    */
    public OFImage(int width, int height)
    {
        super(width, height, TYPE_INT_RGB);
    }

    /**
    * Set a given pixel of this image to a specified color. The
    * color is represented as an (r,g,b) value.
    * @param x The x position of the pixel.
    * @param y The y position of the pixel.
    * @param col The color of the pixel.
    */
    public void setPixel(int x, int y, Color col)
    {
        int pixel = col.getRGB();
        setRGB(x, y, pixel);
    }

    /**
    * Get the color value at a specified pixel position.
    * @param x The x position of the pixel.
    * @param y The y position of the pixel.
    * @return The color of the pixel at the given position.
    */
    public Color getPixel(int x, int y)
    {
        int pixel = getRGB(x, y);
        return new Color(pixel);
    }

    /**
    * Make this image a bit darker.
    */
    public void darker()
    {
        int height = getHeight();
        int width = getWidth();
        for (int i = 0; i < height; i++)
        {
            for (int j = 0; j < width; j++)
            {
                setPixel(j, i, getPixel(j, i).darker());
            }
        }
    }

    /**
    * Make this image a bit lighter.
    */
    public void lighter()
    {
        int height = getHeight();
        int width = getWidth();
        for (int i = 0; i < height; i++)
        {
            for (int j = 0; j < width; j++)
            {
                setPixel(j, i, getPixel(j, i).brighter());
            }
        }
    }

    /**
    * Perform a three level threshold operation.
    * That is: repaint the image with only three color values:
    * white, gray, and black.
    */
    public void threshold()
    {
        int height = getHeight();
        int width = getWidth();
        for (int i = 0; i < height; i++)
        {
            for (int j = 0; j < width; j++)
            {
                Color pixel = getPixel(j, i);
                int brightness = (pixel.getRed() + pixel.getBlue() + pixel.getGreen()) / 3;
                if (brightness <= 85)
                {
                    setPixel(j, i, Color.BLACK);
                }

                else if (brightness <= 85 * 2)
                {
                    setPixel(j, i, Color.GRAY);
                }

                else
                {
                    setPixel(j, i, Color.WHITE);
                }
            }
        }
    }
}