PDFlib Cookbook

cookbook

images/center_image_on_card

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/* $Id: center_image_on_card.java,v 1.6 2014/01/30 14:05:25 rjs Exp $
 * Center image on card:
 * Place an image on an imported PDF card
 *
 * The image will be placed in the center on the imported PDF page and scaled
 * to 80% of the page size. The height of the image will be scaled accordingly
 * so that the picture will stay in ratio.
 *
 * Required software: PDFlib+PDI/PPS 9
 * Required data: PDF document, image file
 */
package com.pdflib.cookbook.pdflib.images;

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

public class center_image_on_card
{
    public static void main (String argv[])
    {
	/* This is where the data files are. Adjust as necessary. */
	String searchpath = "../input";
	String outfile = "center_image_on_card.pdf";
	String title = "Center Image on Card";

	pdflib p = null;
	String imagefile = "nesrin.jpg";
	String cardfile = "card.pdf";
	int image, card, cardpage;
	double cardwidth, cardheight;
	int exitcode = 0;

	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: 1.6 $");

	    /* Load the image */
	    image = p.load_image("auto", imagefile, "");

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

	    /* Load the card file */
	    card = p.open_pdi_document(cardfile, "");
	    if (card == -1)
		throw new Exception("Error: " + p.get_errmsg());

	    /* Load the first page of the card file */
	    cardpage = p.open_pdi_page(card, 1, "");
	    if (cardpage == -1)
		throw new Exception("Error: " + p.get_errmsg());

	    /* Query the width and height of the first page of the card */
	    cardwidth = p.pcos_get_number(card, "pages[0]/width");
	    cardheight = p.pcos_get_number(card, "pages[0]/height");

	    /* Create a page with the width and height of the card */
	    p.begin_page_ext(0, 0, "width=" + cardwidth + " height=" + cardheight);

	    /* Place the card page */
	    p.fit_pdi_page(cardpage, 0, 0, "");

	    /* Place the image in the center of a box which covers 80% of the card
	     * size and starts from 10 percent of the card width and height. Fit
	     * the image proportionally into the box so that it will cover 80% of
	     * the card size as well.
	     */
	    p.fit_image(image, cardwidth * 0.1, cardheight * 0.1,
		    "boxsize={" + cardwidth * 0.8 + " " + cardheight * 0.8 +
		    "} position=center fitmethod=meet");

	    p.end_page_ext("");
	    p.close_image(image);
	    p.close_pdi_page(cardpage);
	    p.close_pdi_document(card);
	    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);
        }
    }
}