PDFlib Cookbook

cookbook

text_output/simple_stamp

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/*
 * $Id: simple_stamp.java,v 1.20 2016/01/11 14:27:14 stm Exp $
 * 
 * Simple stamp:
 * Create a stamp across the page which runs diagonally from one edge to the
 * other
 *
 * Place a text line as outlines like a stamp in the background of a Textflow.
 * Place a text line like a stamp with a certain opacity on an image.
 * 
 * See Cookbook topic "text_output/watermark" for creating watermark stamps
 * which can be edited in Acrobat.
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: none
 */
package com.pdflib.cookbook.pdflib.text_output;

import com.pdflib.pdflib;
import com.pdflib.PDFlibException;

public class simple_stamp
{
    public static void main (String argv[])
    {
	/* This is where the data files are. Adjust as necessary. */
	String searchpath = "../input";
	String outfile = "simple_stamp.pdf";
	String title = "Simple Stamp";

	pdflib p = null;
	int exitcode = 0;
	int font, image, gstate;
	String imagefile = "nesrin.jpg";
	String result;
	int tf = -1;
	final double llx=50, lly=50;

	final String optlist =
	    "fontname=Helvetica fontsize=24 encoding=unicode leading=120% charref";

	final String textflow =
	    "To fold the famous rocket looper proceed as follows:\n" +
	    "Take a DIN A4 sheet.\nFold it lenghtwise in the middle.\nThen, fold " +
	    "the upper corners down.\nFold the long sides inwards that the " +
	    "points A and B meet on the central fold.\nFold the points C and D " +
	    "that the upper corners meet with the central fold as well." +
	    "\nFold the plane in the middle. Fold the wings down that they close " +
	    "with the lower border of the plane.";

	try {
	    p = new pdflib();
	    p.set_option("searchpath={" + searchpath + "}");

	    /* This means we must check return values of load_font() etc. */
	    p.set_option("errorpolicy=return");

	    /* Set an output path according to the name of the topic */
	    if (p.begin_document(outfile, "") == -1)
		throw new Exception("Error: " + p.get_errmsg());

	    p.set_info("Creator", "PDFlib Cookbook");
	    p.set_info("Title", title + " $Revision: 1.20 $");

	    /* Page 1 */
	    p.begin_page_ext(595, 842, "");

	    font = p.load_font("Helvetica-Bold", "unicode", "");

	    if (font == -1)
		throw new Exception("Error: " + p.get_errmsg());

	    /* Fit the text line as outlines like a stamp in the specified box. The
	     * stamp will be placed diagonally from the upper left to the lower
	     * right (stamp=ul2lr).
	     */
	    p.fit_textline("The Famous Rocket Looper", llx, lly, "font=" + font +
		" strokecolor={rgb 1 0 0} textrendering=1 boxsize={500 750} " +
		"strokecolor={rgb 0.5 0 1} stamp=ul2lr");

	    /* Place the Textflow on top of the stamp */
	    tf = p.add_textflow(tf, textflow, optlist);
	    if (tf == -1)
		throw new Exception("Error: " + p.get_errmsg());

	    result = p.fit_textflow(tf, 100, 100, 400, 700, "");
	    if (!result.equals("_stop"))
	    {
		/* Check for errors or more text to be placed */
	    }

	    p.end_page_ext("");

	    /* Page 2 */
	    p.begin_page_ext(350, 220, "");

	    /* Load and place the image first to have it in the background
	    */
	    image = p.load_image("auto", imagefile, "");

	    if (image == -1)
	    throw new Exception("Error: " + p.get_errmsg());

	    p.fit_image(image, 0, 0, "scale=0.5");

	    /* Save the current graphics state */
	    p.save();

	    /* Set the opacity in the current graphics state,
	     * for the stamp to appear slightly transparent
	     */
	    gstate = p.create_gstate("opacityfill=0.5");
	    p.set_gstate(gstate);

	    /* Fit the text line as outlines like a stamp in the specified box.
	     * The stamp will be place diagonally from the lower left to the upper
	     * right (stamp=ll2ur). It will be drawn in a transparent white 
	     * according to the opacity set for the current graphics state.
	     */
	    p.fit_textline("Our Test Image", 30, 10, "font=" + font +
		" fillcolor={rgb 1 1 1} boxsize={300 200} fontsize=1 stamp=ll2ur");

	    p.restore();

	    p.end_page_ext("");

	    p.end_document("");

        } catch (PDFlibException e) {
            System.err.print("PDFlib exception occurred:\n");
            System.err.print("[" + e.get_errnum() + "] " + e.get_apiname() +
                ": " + e.get_errmsg() + "\n");
	    exitcode = 1;
        } catch (Exception e) {
            System.err.println(e.getMessage());
	    exitcode = 1;
        } finally {
            if (p != null) {
                p.delete();
            }
	    System.exit(exitcode);
        }
    }
}