path_objects/import_path_from_image
Import a path object from an image file and use it for filling, stroking or clipping.
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/*
* Import a path object from an image file and use it for filling, stroking
* or clipping
*
* Use a TIFF or JPEG image containing a clipping path. Import the path
* (while ignoring the pixel data) and use the resulting path object
* for filling, stroking or clipping.
*
* Required software: PDFlib/PDFlib+PDI/PPS 9
* Required data: TIFF or JPEG image containing a clipping path
*/
package com.pdflib.cookbook.pdflib.path_objects;
import com.pdflib.pdflib;
import com.pdflib.PDFlibException;
public class import_path_from_image
{
public static void main (String argv[])
{
/* This is where the data files are. Adjust as necessary. */
String searchpath = "../input";
String outfile = "import_path_from_image.pdf";
String title = "Import path from image";
pdflib p = null;
String imagefile = "child_clipped.jpg";
int image;
int exitcode = 0;
double target_x = 50, target_y = 50; // target location
try {
int path, bbox;
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);
/* Start a page */
p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
/* Load the image file with its integrated clipping path
* Add the following option to retrieve a particular path by
* name: "clippingpathname={Path 47}".
* "infomode" means that the pixel data is ignored and
* not loaded into the PDF to reduce output file size.
*/
image = p.load_image("auto", imagefile, "infomode");
if (image == -1)
throw new Exception("Error: " + p.get_errmsg());
/*
* You can supply formatting options here so that the
* path will be formatted the same way as an image.
*/
String formatting_options = "boxsize={300 300}";
/* Supply the formatting options when retrieving
* the clipping path to ensure correct scaling and placement.
*/
path = (int) p.info_image(image, "clippingpath", formatting_options);
if (path == -1)
throw new Exception("Error: image '" + imagefile + "' doesn't contain clipping path");
/* Mark the target location with a red circle for illustration */
p.set_graphics_option("fillcolor=red");
p.circle(target_x, target_y, 5);
p.fill();
p.save();
/* Optional: retrieve the bounding box of the placed image and
* clip the imported path to this box. This may be useful if the
* image contains irrelevant additional paths outside the image
* area. However, if you need the additional paths you should
* skip the bbox clipping.
*/
bbox = (int) p.info_image(image, "boundingbox", formatting_options);
p.draw_path(bbox, target_x, target_y, "close clip");
/* Draw the path at the target location */
String pathoptlist =
"close stroke strokecolor=red fill fillcolor=blue " +
"linewidth=2 linejoin=round linecap=round ";
p.draw_path(path, target_x, target_y, pathoptlist + formatting_options);
p.restore();
// Delete the path objects
p.delete_path(path);
p.delete_path(bbox);
/* Close the image */
p.close_image(image);
p.end_page_ext("");
p.end_document("");
} catch (PDFlibException e) {
System.err.println("PDFlib exception occurred:");
System.err.println("[" + e.get_errnum() + "] " + e.get_apiname() +
": " + e.get_errmsg());
exitcode = 1;
} catch (Exception e) {
System.err.println(e);
exitcode = 1;
} finally {
if (p != null) {
p.delete();
}
System.exit(exitcode);
}
}
}