PDFlib Cookbook

cookbook

graphics/stamp_on_print_layer

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/* $Id: stamp_on_print_layer.java,v 1.5 2013/01/15 10:11:59 stm Exp $
 * 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;
    
    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 + " $Revision: 1.5 $");

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