/* $Id: starter_pdfx4.java,v 1.2 2011/08/01 13:52:45 stm Exp $
 *
 * PDF/X-4 starter:
 * Create PDF/X-4 conforming output with layer variants and transparency
 *
 * A low-level layer is created for each of several languages, as well
 * as an image layer. Each of the language layers together with the
 * image layer forms a "layer variant" according to PDF/X-4 (in Acrobat
 * layer variants are called "configurations").
 * This ensures that low-level layers cannot be enabled/disabled individually,
 * but only via the corresponding layer variant. This prevents accidental
 * printing of a language layer without the required image layer.
 *
 * The document contains transparent text which is allowed in
 * PDF/X-4, but not earlier PDF/X standards.
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 8
 * Required data: font file, image file, ICC output intent profile
 *                (see www.pdflib.com for ICC profiles)
 */
package com.pdflib.cookbook.pdflib.pdfx;


import com.pdflib.pdflib;
import com.pdflib.PDFlibException;

class starter_pdfx4 {
    public static void main(String argv[]) {
        /* This is where the data files are. Adjust as necessary. */
        final String searchpath = "../input";

        pdflib p = null;
        final String imagefile = "zebra.tif";
        String optlist;

        int font, image, icc, gstate;
        int layer_english, layer_german, layer_french, layer_image;
        double width, height;

        try {
            p = new pdflib();

            /* This means we must check return values of load_font() etc. */
            p.set_parameter("errorpolicy", "return");

            p.set_parameter("SearchPath", searchpath);

            if (p.begin_document("starter_pdfx4.pdf", "pdfx=PDF/X-4") == -1) {
                throw new Exception("Error: " + p.get_errmsg());
            }

            p.set_info("Creator", "PDFlib starter sample");
            p.set_info("Title", "starter_pdfx4 $Revision: 1.2 $");

            if (p.load_iccprofile("ISOcoated.icc", "usage=outputintent") == -1) {
                System.err.print("Error: " + p.get_errmsg() + "\n");
                System.err.print("Please install the ICC profile package from "
                        + "www.pdflib.com to run the PDF/X starter sample.\n");
                p.delete();
                System.exit(2);
            }

            /*
             * Define the low-level layers. These cannot be controlled directly
             * in Acrobat's layer pane.
             */

            layer_english = p.define_layer("English text", "");
            layer_german = p.define_layer("German text", "");
            layer_french = p.define_layer("French text", "");
            layer_image = p.define_layer("Images", "");

            /* Define a radio button relationship for the language layers.
             * Individual layers will only be visible in Acrobat X (but
             * not Acrobat 9).
             */
            optlist = "group={" + layer_english + " " + layer_german + " "
                        + layer_french + "}";
            p.set_layer_dependency("Radiobtn", optlist);

            /*
             * Define the layer combinations for document variants. The variants
             * control the low-level layers, and can be activated in Acrobat 9's
             * layer pane. Using layer variants we can make sure that the image
             * layer cannot accidentally be disabled; it will always accompany
             * the text regardless of the selected language.
             */

            optlist = "variantname={English variant} includelayers={"
                    + layer_english + " " + layer_image + "} "
                    + "defaultvariant=true createorderlist";
            p.set_layer_dependency("Variant", optlist);

            optlist = "variantname={German variant} includelayers={"
                    + layer_german + " " + layer_image + "}";
            p.set_layer_dependency("Variant", optlist);

            optlist = "variantname={French variant} includelayers={"
                    + layer_french + " " + layer_image + "}";
            p.set_layer_dependency("Variant", optlist);

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

            /* Font embedding is required for PDF/X */
            font = p.load_font("LuciduxSans-Oblique", "winansi", "embedding");

            if (font == -1) {
                throw new Exception("Error: " + p.get_errmsg());
            }

            p.setfont(font, 24);

            p.begin_layer(layer_english);

            p.fit_textline("PDF/X-4 starter sample with layers", 50, 700, "");

            p.begin_layer(layer_german);
            p.fit_textline("PDF/X-4 Starter-Beispiel mit Ebenen", 50, 700, "");

            p.begin_layer(layer_french);
            p.fit_textline("PDF/X-4 Starter exemple avec des calques", 50, 700,
                    "");

            p.begin_layer(layer_image);

            p.setfont(font, 48);

            /* The RGB image needs an ICC profile; we use sRGB. */
            icc = p.load_iccprofile("sRGB", "");
            optlist = "iccprofile=" + icc;
            image = p.load_image("auto", imagefile, optlist);

            if (image == -1) {
                throw new Exception("Error: " + p.get_errmsg());
            }

            /* Place a diagonal stamp across the image area */
            width = p.info_image(image, "width", "");
            height = p.info_image(image, "height", "");

            optlist = "boxsize={" + width + " " + height + "} stamp=ll2ur";
            p.fit_textline("Zebra", 0, 0, optlist);

            /* Set transparency in the graphics state */
            gstate = p.create_gstate("opacityfill=0.5");
            p.set_gstate(gstate);

            /* Place the image on the page and close it */
            p.fit_image(image, (double) 0.0, (double) 0.0, "");
            p.close_image(image);

            /* Close all layers */
            p.end_layer();

            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();
            }
        }
    }
}