Use PdfStamper.getOverContent().

----- Original Message -----
From: "Sloey, James" <James.Sloey@(protected)>
To: <itext-questions@(protected)>
Sent: Thursday, May 19, 2005 9:35 PM
Subject: [iText-questions] Insert an image into a PDF template -
PdfContentByte null pointer


I have a PDF template containing a background image and some fields that
I fill with text.
I also need to insert a gif image of the persons signature on the page.
I read an archived reply from Paulo and tried to use PdfContentByte.
If I comment out the image statement the text gets filled in correctly
on the output PDF file and the signature location is printed to stdout.
When I attempt to add the image I get a null pointer error.
Any help would be appreciated
Thanks
Jim Sloey

// example
import java.io.*;
import java.util.*;
import com.lowagie.text.Image;
import com.lowagie.text.pdf.*;
import com.lowagie.text.DocumentException;

public class stampit {
static void fillTemplate (String path, String template, String sig,
String outfile){
//get a handle to the file location
String templatePath = path;

if(templatePath == null)
 {templatePath = "/";}
else if(!templatePath.endsWith("/"))
 {templatePath += "/";}
try
{
// Reads in the pdf Template
PdfReader reader = new PdfReader(templatePath + template);
PdfStamper stamp = new PdfStamper(reader, new
FileOutputStream(path+outfile));
AcroFields form = stamp.getAcroFields();

//set the field values in the pdf form
form.setField("name","James T. Sloey");
float image_loc[] = form.getFieldPositions("signature");
    System.out.println(image_loc[0]);
    System.out.println(image_loc[1]);
    System.out.println(image_loc[2]);
    System.out.println(image_loc[3]);
    System.out.println(image_loc[4]);
// get the image
Image image = Image.getInstance(path+sig);
stamp.getWriter().getDirectContent().addImage(image,100, 0, 0, 100,
image_loc[2], image_loc[4]);
// done
stamp.setFormFlattening(true);
stamp.close();}

catch(Exception e)
{System.out.println("Error: " + e);}
}
public static void main(String[] args) {
String template = "template.pdf";
String path = "/export/home/jsloey/src/";
String outfile = "cn1234567.pdf";
String sigfile = "sig.gif";
System.out.println("Creating "+path+outfile+" from "+path+template);
fillTemplate(path,template, sigfile, outfile);
System.out.println("done");
}
}



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