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graphics/overprinting_text

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/* $Id: overprinting_text.java,v 1.6 2013/02/20 10:35:46 stm Exp $

 * Overprinting text:

 * Create text which will overprint other page contents instead of knocking

 * it out

 *

 * Create an extended graphics state with the options

 * "overprintfill=true overprintmode=1".

 *

 * 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 overprinting_text {

    public static void main(String argv[]) {

        /* This is where the data files are. Adjust as necessary. */

        String searchpath = "../input";

        String outfile = "overprinting_text.pdf";

        String title = "Overprinting Text";


        pdflib p = null;


        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");


            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: 1.6 $");


            /* Load the font. */

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

            if (font == -1)

                throw new Exception("Error: " + p.get_errmsg());


            /* Start page */

            p.begin_page_ext(400, 300, "");


            /* Draw a red background rectangle */

            p.setcolor("fill", "cmyk", 0, 1, 1, 0);

            p.rect(0, 0, 400, 300);

            p.fill();


            /* Save the current graphics state */

            p.save();


            /* Create an extended graphics state */

            int gstate = p.create_gstate("overprintfill overprintmode=1");


            /* Apply the extended graphics state */

            p.set_gstate(gstate);


            /*

             * Show some text which will overprint other page contents according

             * to the graphics state set

             */

            String fontopts = "font=" + font + " fontsize=36";


            p.setcolor("fill", "cmyk", 0, 0, 0, 1);

            p.fit_textline("overprinting text", 20, 200, fontopts);


            /* Restore the current graphics state */

            p.restore();


            /*

             * Show some text. It will not be overprinting since the old

             * graphics state has been restored with no overprinting set.

             */

            p.setcolor("fill", "cmyk", 0, 0, 0, 1);

            p.fit_textline("text not overprinting", 20, 100, fontopts);


            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();

            }

        }

    }

}