MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class MainClass extends JPanel {

    public void paint(Graphics g) {
        BufferedImage clone = emboss(createImage());

        g.drawImage(clone, 20, 20, this);
    }

    public BufferedImage emboss(BufferedImage src) {
        int width = src.getWidth();
        int height = src.getHeight();

        BufferedImage dst;
        dst = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

        for (int i = 0; i < height; i++)
            for (int j = 0; j < width; j++) {
                int upperLeft = 0;
                int lowerRight = 0;

                if (i > 0 && j > 0)
                    upperLeft = src.getRGB(j - 1, i - 1);

                if (i < height - 1 && j < width - 1)
                    lowerRight = src.getRGB(j + 1, i + 1);

                int redDiff = ((lowerRight >> 16) & 255) - ((upperLeft >> 16) & 255);

                int greenDiff = ((lowerRight >> 8) & 255) - ((upperLeft >> 8) & 255);

                int blueDiff = (lowerRight & 255) - (upperLeft & 255);

                int diff = redDiff;
                if (Math.abs(greenDiff) > Math.abs(diff))
                    diff = greenDiff;
                if (Math.abs(blueDiff) > Math.abs(diff))
                    diff = blueDiff;

                int grayColor = 128 + diff;

                if (grayColor > 255)
                    grayColor = 255;
                else if (grayColor < 0)
                    grayColor = 0;

                int newColor = (grayColor << 16) + (grayColor << 8) + grayColor;

                dst.setRGB(j, i, newColor);
            }

        return dst;
    }

    private BufferedImage createImage() {
        BufferedImage bufferedImage = new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
        Graphics g = bufferedImage.getGraphics();
        g.drawString("www.java2s.com", 20, 20);

        return bufferedImage;
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.getContentPane().add(new MainClass());

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(200, 200);
        frame.setVisible(true);
    }

}