PDFlib Cookbook

cookbook

images/image_rounded_corners

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/* $Id: image_rounded_corners.java,v 1.9 2014/01/30 14:05:25 rjs Exp $
 * Image with rounded corners:
 * Place an image with rounded corners
 *
 * Get the dimensions of an image and create a clipping path as a rectangle of
 * 0.5 of the width and height of the image and with rounded corners. Fit the
 * image into a box with the position and size of the clipping path.
 *
 * 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_rounded_corners
{
    public static void main (String argv[])
    {
	/* This is where the data files are. Adjust as necessary. */
	String searchpath = "../input";
	String outfile = "image_rounded_corners.pdf";
	String title = "Image with Rounded Corners";

	pdflib p = null;
	int exitcode = 0;
	String imagefile = "nesrin.jpg";
	int image;
	double width, height;   // width and height of the image
	int radius=50;          // radius of the circle describing a rounded corner
	int x=20, y=20;         // lower left position of the image

	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 $");

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

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

	    /* Start a page with the image dimensions */
	    p.begin_page_ext(width, height, "");

	    /* Save the current graphics state including the clipping path */
	    p.save();

	    /* Define a path as a rectangle of 0.5 of the original width and height
	     * of the image and with rounded corners
	     */
	    width *= 0.5;
	    height *= 0.5;

	    p.moveto(x + radius, y);
	    p.lineto(x + width - radius, y);
	    p.arc(x + width - radius, y + radius, radius, 270, 360);
	    p.lineto(x + width, y + height - radius );
	    p.arc(x + width - radius, y + height - radius, radius, 0, 90);
	    p.lineto(x + radius, y + height);
	    p.arc(x + radius, y + height - radius, radius, 90, 180);
	    p.lineto(x , y + radius);
	    p.arc(x + radius, y + radius, radius, 180, 270);

	    /* Set clipping path to defined path */
	    p.clip();

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

	    /* Fit the image into a box with the size and start point (x,y) of the
	     * clipping path. The image is placed in the center of the box using a
	     * fit method of "meet" which will scale the image proportionally until
	     * it completely covers the box */
	    p.fit_image(image, x, y, "boxsize {" + width + " " + height +
		"} position center fitmethod=meet");

	    /* Close image and restore original clipping (no clipping) */
	    p.close_image(image);
	    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");
	    exitcode = 1;
        } catch (Exception e) {
            System.err.println(e.getMessage());
	    exitcode = 1;
        } finally {
            if (p != null) {
                p.delete();
            }
	    System.exit(exitcode);
        }
    }
}