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text_output/image_as_text_fill_color

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/* $Id: image_as_text_fill_color.java,v 1.11 2016/07/27 08:59:53 stm Exp $

 * Image as text fill color:

 * Create outline text and fill the interior of the glyphs with an image.

 *

 * Define a pattern containing an image and use it as the fill color for the

 * text being filled and stroked.

 *

 * Required software: PDFlib/PDFlib+PDI/PPS 9.0.2

 * Required data: none

 */

package com.pdflib.cookbook.pdflib.text_output;


import com.pdflib.pdflib;

import com.pdflib.PDFlibException;


public class image_as_text_fill_color {

    public static void main(String argv[]) {

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

        String searchpath = "../input";

        String outfile = "image_as_text_fill_color.pdf";

        String title = "Image as Text Fill Color";

        int exitcode = 0;


        pdflib p = null;


        String imagefile = "text_filling.tif";

        int font, pattern, image;

        double imageheight, imagewidth, resx, resy;


        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: 1.11 $");


            /* Load the font. */

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

            if (font == -1)

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


            /* Load the background image */

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

            if (image == -1)

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


            /*

             * Retrieve the image dimensions (related to its original

             * resolution)

             */

            imagewidth = p.info_image(image, "imagewidth", "");

            imageheight = p.info_image(image, "imageheight", "");


            /*

             * The image may have a resolution above 72 dpi. If we used the

             * returned dimensions (in points) for the pattern height and width

             * and placed our image into the pattern, it wouldn't match the

             * pattern size, and a white margin would be left. To make the

             * pattern the same size as the image we calculate the image size

             * based on its resolution.

             *

             * Retrieve the original image resolution

             */

            resx = p.info_image(image, "resx", "");

            resy = p.info_image(image, "resy", "");


            /* Calculate the image dimensions for 72 dpi */

            if (resx > 0) {

                imagewidth = imagewidth * 72 / resx;

                imageheight = imageheight * 72 / resy;

            }


            /*

             * Create a pattern using the retrieved image dimensions. The

             * painttype parameter must be set to 1 since a colorized image is

             * used (as opposed to an image mask).

             */

            pattern = p.begin_pattern_ext(imagewidth, imageheight, "");

            p.fit_image(image, 0, 0, "");

            p.end_pattern();

            p.close_image(image);


            /* Start page */

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


            /*

             * Set the pattern as the current fill color. Encapsulate the

             * setcolor() call with save() and restore() to be able to proceed

             * with the original colors.

             */

            p.save();

           

            /*

             * In addition to filling the text (which is the default), stroke

             * the text by setting the textrendering mode to 2 (fill and stroke)

             * and defining a stroke color different from black.

             */

            p.set_text_option("textrendering=2");

            p.setcolor("stroke", "rgb", 0.5, 0.2, 0.1, 0);

            p.setcolor("fill", "pattern", pattern, 0, 0, 0);


            /*

             * Output the text with the current fill color, i.e. the image in

             * terms of the pattern color

             */

            int fontsize = 50;

            p.set_text_option("font=" + font + " fontsize=" + fontsize);

            p.fit_textline("Hello World!", 50, 500, "");

            p.fit_textline("(says PDFlib GmbH)", 50, 500 - fontsize, "");


            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);

        }

    }

}