PDFlib Cookbook

cookbook

graphics/stamp_on_print_layer

Place a stamp on a layer which is only visible upon printing.

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/*
 * Stamp on print layer:
 * Place a stamp on a layer which is only visible upon printing
 * 
 * Create a layer "stamp" which contains the stamp. The layer properties are set
 * to print, but not display the layer contents on screen.
 * Create some standard text which is displayed and printed by default.  
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: none
 */
package com.pdflib.cookbook.pdflib.graphics;

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

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

        pdflib p = null;
        final int x = 50, y = 50;
        int tf = -1, font, stamplayer;
        int exitcode = 0;
        
        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");

            /* Open the document with the "Layers" navigation tab visible */
            if (p.begin_document(outfile, "openmode=layers") == -1)
                throw new Exception("Error: " + p.get_errmsg());

            p.set_info("Creator", "PDFlib Cookbook");
            p.set_info("Title", title);

            /* Load the font */
            font = p.load_font("Helvetica", "unicode", "");
            if (font == -1)
                throw new Exception("Error: " + p.get_errmsg());

            /* Start page */
            p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
            

            /* ---------------------------------------------------------------
             * Define the layer "stamp" to be hidden when opening the document
             * (initialviewstate=false) and place the stamp on it.
             * ---------------------------------------------------------------
             */
            stamplayer = p.define_layer("stamp", 
                "initialviewstate=false initialprintstate=true");
            p.begin_layer(stamplayer);
            
            /* Fit a 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", x, y, "font=" + font +
                " strokecolor={rgb 1 0 0} textrendering=1 boxsize={500 750} " +
                "strokecolor={rgb 0.5 0 1} stamp=ul2lr");
            
            /* End all layers */
            p.end_layer();

            /* ------------------------------------
             * Place some standard text on the page
             * ------------------------------------
             */
            String optlist = "fontname=Helvetica fontsize=24 encoding=unicode " +
                "leading=120% charref";
            
            tf = p.add_textflow(tf, textflow, optlist);
            if (tf == -1)
                throw new Exception("Error: " + p.get_errmsg());

            String 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("");

            p.end_document("");

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