// TextToJpeg.java - creates a JPEG image to display text in a crawler-safe fashion
// By Rowland http://rowland.blcss.com/

import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.io.*;
import com.sun.image.codec.jpeg.*;


class TextToJpeg {
    public Color bgcolor= Color.white;
    public Color fgcolor= Color.black;
    public int fontsize= 14;
    public int fontstyle= Font.PLAIN;
    public String fontname = "Arial";
    public String text= "???";

    public TextToJpeg() { }
    public TextToJpeg(Color _bgcolor, Color _fgcolor, int _fontsize) {
	bgcolor= _bgcolor;  fgcolor= _fgcolor;  fontsize= _fontsize;
    }

    public BufferedImage getBufferedImage(String _text) {
	text= _text;
	return getBufferedImage();
    }
    public BufferedImage getBufferedImage()   {
	FontMetrics fm;
	BufferedImage img = new BufferedImage(1000, 200, BufferedImage.TYPE_INT_RGB);
	// ...big canvas because we don't know how big we'll need
	Graphics2D g2 = img.createGraphics();
	g2.setBackground(bgcolor);
	g2.clearRect(0,0, 1000,200);
	g2.setColor(fgcolor);
	Font font = new Font(fontname, fontstyle, fontsize);
	g2.setFont(font);
	fm= g2.getFontMetrics();
	float ascent= fm.getAscent();

	FontRenderContext frc= g2.getFontRenderContext();
	TextLayout tl = new TextLayout(text, font, frc);
	float descent= tl.getDescent();
	float advance= tl.getAdvance();
	tl.draw(g2, 0.0f, (float)ascent);

	// Now extract the part we want...
	BufferedImage img2= img.getSubimage(0, 0, (int)advance, (int)(ascent+descent));
	g2.dispose();
	return img2;
    }

    public void jpegEncode(OutputStream out, String _text)  throws IOException {
	text= _text;
	jpegEncode(out);
    }
    public void jpegEncode(OutputStream out) throws IOException {
	BufferedImage img= getBufferedImage();
	JPEGImageEncoder encoder= JPEGCodec.createJPEGEncoder(out);
	JPEGEncodeParam param =  encoder.getDefaultJPEGEncodeParam(img);
	param.setQuality(1.0f, true);
	encoder.encode(img, param);
    }

    public void jpegEncodeToFile(String _text, String filespec) throws IOException  {
	jpegEncodeToFile(_text, new File(filespec));
    }
    public void jpegEncodeToFile(String filespec)  throws IOException {
	jpegEncodeToFile(new File(filespec));
    }
    public void jpegEncodeToFile(String _text, File f)  throws IOException{
	text= _text;
	jpegEncodeToFile(f);
    }
    public void jpegEncodeToFile(File f) throws IOException {
	FileOutputStream fout= new FileOutputStream(f);
	jpegEncode(fout);
	fout.close();
    }

    public static void main(String args[]) {
	try {
	TextToJpeg t2j= new TextToJpeg();
	t2j.text= args[0];
	t2j.jpegEncodeToFile(args[1]);
	} catch (Exception E) {
	    System.err.println(E.toString()); 
	}
    }
}