import java.util.Map;

import javax.imageio.ImageIO;
import java.awt.Graphics2D;


import java.util.HashMap;
import java.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;


public class Utils {
    public static String getZplCode(BufferedImage bitmap, Boolean addHeaderFooter) {
        ZPLConverter zp = new ZPLConverter();
        zp.setCompressHex(true);
        zp.setBlacknessLimitPercentage(80);
        BufferedImage grayBitmap = toGrayScale(bitmap);
        return zp.convertFromImage(grayBitmap, addHeaderFooter);
    }

    public static void main(String[] args) throws IOException {
        BufferedImage bitmap = ImageIO.read(new File("/Users/shradheyathakre/Downloads/temp.png"));
        System.out.println(getZplCode(bitmap, true));
    }

    public static BufferedImage toGrayScale(BufferedImage img) {
        for (int x = 0; x < img.getWidth(); ++x) {
            for (int y = 0; y < img.getHeight(); ++y)
            {
                int rgb = img.getRGB(x, y);
                int r = (rgb >> 16) & 0xFF;
                int g = (rgb >> 8) & 0xFF;
                int b = (rgb & 0xFF);

                int grayLevel = (r + g + b) / 3;
                int gray = (grayLevel << 16) + (grayLevel << 8) + grayLevel;
                img.setRGB(x, y, gray);
            }
        }

        return img;
    }
}