/* $Id: simple_stamp.java,v 1.16 2007/10/30 16:16:33 katja 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.
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 7
 * 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 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_parameter("SearchPath", searchpath);

        /* This means we must check return values of load_font() etc. */
        p.set_parameter("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: 1.16 $");

        /* Page 1 */
        p.begin_page_ext(595, 842, "");

        /* For PDFlib Lite: change "unicode" to "winansi" */
        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");
        } catch (Exception e) {
            System.err.println(e.getMessage());
        } finally {
            if (p != null) {
                p.delete();
            }
        }
    }
}