graphics/overprinting_text

 * 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 Lite/PDFlib/PDFlib+PDI/PPS 7

 * 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;

    int gstate, font;

    try {

        p = new pdflib();

        p.set_parameter("SearchPath", searchpath);

        /* This means we must check return values of load_font() etc. */

        p.set_parameter("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: 1.3 $");

        /* Load the font; for PDFlib Lite: change "unicode" to "winansi" */

        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 */

        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

         */

        p.setfont(font, 36);

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

        p.set_text_pos(20, 200);

        p.show("overprinting text");

        /* 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.setfont(font, 36);

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

        p.set_text_pos(20, 100);

        p.show("text not overprinting");

        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();

            }

        }

    }

}