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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);

        }

    }

}