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text_output/transparent_text

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/* $Id: transparent_text.java,v 1.5 2013/01/15 10:12:08 stm Exp $

 * Transparent text:

 * Create some transparent text

 *

 * Display a background image and show transparent text in the foreground.

 * Create transparency by applying an extended graphics state with the

 * "opacityfill" option set to a value less than 1.

 *

 * Required software: PDFlib/PDFlib+PDI/PPS 9

 * Required data: image file

 */

package com.pdflib.cookbook.pdflib.text_output;


import com.pdflib.pdflib;

import com.pdflib.PDFlibException;


public class transparent_text

{

    public static void main (String argv[])

    {

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

    String searchpath = "../input";

    String outfile = "transparent_text.pdf";

    String title = "Transparent Text";


    pdflib p = null;

   

    String imagefile = "nesrin.jpg";

    int image, gstate, font;

 

    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: 1.5 $");

       

        /* Load image */

        image = p.load_image("auto", imagefile, "");

        if (image == -1)

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


        /* Load the font. */

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

        if (font == -1)

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


        /* Start page */

        p.begin_page_ext(842, 595, "");

       

       

        /* Draw a yellow background rectangle */

        p.setcolor("fill", "rgb", 1, 0.9, 0.58, 0);

        p.rect(0, 0, 842, 595);

        p.fill();

       

        /* Output a background image */

        p.fit_image(image, 50, 50, "");

       

        /* Save the current graphics state. The save/restore of the current

         * state is not necessarily required, but it will help you get back to

         * a graphics state without any transparency.

         */

        p.save();

       

        /* Create an extended graphics state with transparency set to 50%, using

         * create_gstate() with the "opacityfill" option set to 0.5.

         */

        gstate = p.create_gstate("opacityfill=.5");

       

        /* Apply the extended graphics state */

        p.set_gstate(gstate);

       

        /* Display some red text which will be transparent according to the

         * graphics state set

         */

        p.setcolor("fill", "rgb", 1, 0.9, 0.58, 0);

        p.fit_textline("My favorite holiday photo", 100, 100, "font=" + font +

            " fontsize=50");

       

        /* Restore the current graphics state */

        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");

        } catch (Exception e) {

            System.err.println(e.getMessage());

        } finally {

            if (p != null) {

                p.delete();

            }

        }

    }

}