PDFlib Cookbook

cookbook

images/image_dimensions

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/* $Id: image_dimensions.java,v 1.9 2014/01/30 14:05:25 rjs Exp $
 * Image dimensions:
 * Get the dimensions of an image for various purposes
 *
 * Place an image in its original size, retrieve its dimensions using the
 * "matchbox" option and place text directly to the right of the image. Fit an
 * image into a box and use the box dimensions to center text directly below
 * the image. Create a page with the dimensions of an image and place the image
 * so that it covers the page completely.
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: image file
 */
package com.pdflib.cookbook.pdflib.images;

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

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

	pdflib p = null;
	int exitcode = 0;
	String imagefile = "websurfer.jpg";
	String imagefile2 = "nesrin.jpg";
	int font, image;
	double x2 = 0.0, y2 = 0.0, y3 = 0.0;
	double imagewidth, imageheight;

	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: 1.9 $");

	    /* On page 1, place an image in its original size, retrieve its
	     * dimensions using the "matchbox" option and place text directly
	     * to the right of the image
	     */
	    p.begin_page_ext(0, 0, "width=100 height=100");

	    /* Load the image */
	    image = p.load_image("auto", imagefile, "");
	    if (image == -1)
		throw new Exception("Error: " + p.get_errmsg());

	    /* Fit the image with a matchbox called "web" respresenting
	     * the image dimensions */
	    p.fit_image(image, 20, 20, "matchbox={name=web}");
	    p.close_image(image);

	    /* Retrieve the coordinates of the lower right (x2, y2) and upper right
	     * (x3, Y3) image corners via the matchbox "web" specified above
	     */
	    if ((int) p.info_matchbox("web", 1, "exists") == 1)
	    {
		x2 = p.info_matchbox("web", 1, "x2");
		y2 = p.info_matchbox("web", 1, "y2");
		y3 = p.info_matchbox("web", 1, "y3");
	    }

	    font = p.load_font("Helvetica", "unicode", "");
	    if (font == -1)
		throw new Exception("Error: " + p.get_errmsg());

	    /* Start the text line in x direction at the lower right corner of the
	     * image and in y direction 1/4 of the image height up
	     */
	    p.fit_textline("www.kraxi.com", x2, y2 + (y3 - y2)/4, "font=" + font +
		" fontsize=8");

	    p.end_page_ext("");

	    /* On page 2, fit an image into a box and use the box dimensions to
	     * center text directly below the image
	     */
	    p.begin_page_ext(0, 0, "width=100 height=100");

	    /* Load the image */
	    image = p.load_image("auto", imagefile2, "");
	    if (image == -1)
		throw new Exception("Error: " + p.get_errmsg());

	    /* Fit the image with a matchbox called "web" respresenting
	     * the image dimension
	     */
	    p.fit_image(image, 10, 20, "boxsize={80 50} position={center bottom} " +
		"fitmethod=meet");
	    p.close_image(image);

	    font = p.load_font("Helvetica", "unicode", "");
	    if (font == -1)
		throw new Exception("Error: " + p.get_errmsg());

	    /* Start the text line in x direction at the lower right corner of the
	     * image and in y direction 1/4 of the image height up
	     */
	    p.fit_textline("My holiday photo", 10, 10,
		"boxsize={80 50} position={center bottom} font=" + font +
		" fontsize=8");

	    p.end_page_ext("");

	    /* Create page 3 with the original dimensions of the image and place
	     * the image so that it covers the page completely
	     *
	     * Load the image
	     */
	    image = p.load_image("auto", imagefile2, "");
	    if (image == -1)
		throw new Exception("Error: " + p.get_errmsg());

	    /* Get the width and height of the image */
	    imagewidth = p.info_image(image, "imagewidth", "");
	    imageheight = p.info_image(image, "imageheight", "");

	    /* Start page 3 with the dimensions of the image to be placed */
	    p.begin_page_ext(imagewidth, imageheight, "");

	    /* Fit the image */
	    p.fit_image(image, 0, 0, "");

	    p.close_image(image);

	    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);
        }
    }
}