PDFlib Cookbook

cookbook

images/align_text_at_image

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/* $Id: align_text_at_image.java,v 1.4 2014/01/30 14:05:25 rjs Exp $
 * Align text at image:
 * Align text at an image
 *
 * Align text orientated to the west at the lower right corner of an image by
 * retrieving the coordinates of the image matchbox.
 * Align text orientated to the west at the lower right corner of an image
 * orientated to the west.
 *
 * 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 align_text_at_image
{
    public static void main (String argv[])
    {
	/* This is where the data files are. Adjust as necessary. */
	String searchpath = "../input";
	String outfile = "align_text_at_image.pdf";
	String title = "Align Text at Image";

	pdflib p = null;
	int exitcode = 0;
	String imagefile = "kraxi_logo.tif";
	String optlist;
	int font, image;
	double x1 = 0, x2 = 0, y1 = 0, y2 = 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: 1.4 $");

	    /* Start page */
	    p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
	    
	    font = p.load_font("Helvetica", "unicode", "");
	    if (font == -1)
		throw new Exception("Error: " + p.get_errmsg());

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

	    /* -----------------------------------------------------------------
	     * Align text orientated to the west at the lower right corner of an
	     * image
	     * -----------------------------------------------------------------
	     */
	    
	    /* Place the image in the center of a box using the "boxsize" and 
	     * "position" options. Maintain its proportions using "fitmethod=meet".
	     * Use the "matchbox" option with the "borderwidth" suboption to draw a
	     * small rectangle around the image with the "strokecolor" suboption
	     * determining the border color. 
	     */
	    
	    /* Fit the image */
	    optlist = "boxsize={300 200} position={center} " +
		"fitmethod=meet matchbox={name=giantwing borderwidth=3 " +
		"strokecolor={rgb 0.85 0.83 0.85}}";
	    
	    p.fit_image(image, 100, 500, optlist);
	    
	    /* Retrieve the coordinates of the second (lower right) matchbox corner.
	     * The parameter "1" indicates the first instance of the "giantwing"
	     * matchbox.
	     */
	    if ((int) p.info_matchbox("giantwing", 1, "exists") == 1) {
		    x2 = p.info_matchbox("giantwing", 1, "x2");
		y2 = p.info_matchbox("giantwing", 1, "y2");
	    }
	    
	    /* Start the text line orientated to the west at the corner coordinates
	     * retrieved (x2, y2) with a small offset of 3 or 2, respectively.
	     */
	    optlist = "font=" + font + " fontsize=12 orientate=west";
	    
	    p.fit_textline("Foto: Kraxi", x2+3, y2+2, optlist);
	    
	    
	    /* -----------------------------------------------------------------
	     * Align text orientated to the west at the lower right corner of an
	     * image orientated to the west as well.
	     * -----------------------------------------------------------------
	     */
	    
	    /* Place the image in the center of a box using the "boxsize" and 
	     * "position" options. Maintain its proportions using "fitmethod=meet".
	     * Using the "orientate" option orientate the image to the west. Use the
	     * "matchbox" option with the "borderwidth" suboption to draw a small
	     * rectangle around the image with the "strokecolor" suboption
	     * determining the border color. 
	     */
	    optlist = "boxsize={200 300} position={center} fitmethod=meet " +
		"orientate=west matchbox={name=giantwing borderwidth=3 " +
		"strokecolor={rgb 0.85 0.83 0.85}}";
	    
	    p.fit_image(image, 100, 100, optlist);
	    
	    /* Retrieve the coordinates of the first matchbox corner; usually this
	     * will be the lower left corner but with being orientated to the west
	     * it will be moved to the bottom right. The parameter "2" indicates the
	     * second instance of the "giantwing" matchbox.
	     */
	    if ((int) p.info_matchbox("giantwing", 2, "exists") == 1) {
		    x1 = p.info_matchbox("giantwing", 2, "x1");
		y1 = p.info_matchbox("giantwing", 2, "y1");
	    }
	    
	    /* Start the text line orientated to the west at the corner coordinates
	     * retrieved (x1, y1) with a small offset of 3 or 2, respectively.
	     */
	    optlist = "font=" + font + " fontsize=12 orientate=west";
	    
	    p.fit_textline("Foto: Kraxi", x1+3, y1+2, optlist);
	    
	    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);
        }
    }
}