images/add_opi_info
* Add OPI information:
* Attach OPI information to an image
*
* Use the "OPI-1.3" or "OPI-2.0" options of load_image() to attach OPI
* information according to OPI 1.3 or OPI 2.0 to an image, respectively.
*
* From the PDF Reference:
* The Open Prepress Interface (OPI) is a mechanism, originally developed by
* Aldus Corporation, for creating low-resolution placeholders, or proxies, for
* such high-resolution images. The proxy typically consists of a downsampled
* version of the full-resolution image, to be used for screen display and
* proofing. Before the document is printed, it passes through a filter known as
* an OPI server, which replaces the proxies with the original full-resolution
* images.
*
* OPI information in PostScript files is generally referred to as
* "OPI comments". Note that replacing images with OPI always requires suitable
* OPI processing software. PDF display with Acrobat will not be affected by
* OPI.
*
* For more details refer to the OPI 2.0 specification, which is available at
* http://partners.adobe.com/public/developer/en/ps/5660_OPI_2_0.pdf.
*
* 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 add_opi_info
{
public static void main (String argv[])
{
/* This is where the data files are. Adjust as necessary. */
String searchpath = "../input";
String outfile = "add_opi_info.pdf";
String title = "Add OPI Information";
pdflib p = null;
String imagefile = "nesrin.jpg";
int font, image;
int x = 20, y = 500;
int llx = 20, urx = 430, lly = 20, ury = 460;
int tf = -1;
/* The "normalizefilename" option is required for some OPI servers. If it is
* false (default), the supplied image file name will be used without any
* modification; if it is true the image file name will be normalized as
* mandated by the PDF reference.
*
* The examples below use only the required OPI options. For more OPI 1.3
* and 2.0 options refer to the PDFlib API reference. The set of useful
* options depends on the type of OPI server used.
*/
String optlist13 =
"OPI-1.3={normalizefilename " +
"ALDImageFilename={nesrin_hires.jpg} " +
"ALDImageDimensions={745 493} " +
"ALDImageCropRect={10 10 550 390} " +
"ALDImagePosition={10 10 10 540 390 540 390 10} " +
"ALDImageColor={0 0 0 0.5 CustomGray} " +
"ALDImageColorType=Separation }";
String optlist20 =
"OPI-2.0={normalizefilename " +
"ImageFilename={nesrin_hires.jpg} " +
"ImageCropRect={10 10 550 390} " +
"ImageDimensions={745 493} }";
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 font */
font = p.load_font("Courier", "unicode", "");
if (font == -1)
throw new Exception("Error: " + p.get_errmsg());
/* -------------------------------------------------------------
* Place the image in its original size with OPI 1.3 information
* attached
* -------------------------------------------------------------
*/
/* Load the image with the option list for OPI 1.3 information */
image = p.load_image("auto", imagefile, optlist13);
if (image == -1)
throw new Exception("Error: " + p.get_errmsg());
/* Start page 1 */
p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
p.fit_image(image, x, y, "scale=0.5");
tf = p.add_textflow(tf, "", "font=" + font + " fontsize=12");
tf = p.add_textflow(tf,
"Option list for load_image() for OPI 1.3 information:\n\n", "");
tf = p.add_textflow(tf, optlist13, "");
p.fit_textflow(tf, llx, lly, urx, ury, "");
p.end_page_ext("");
p.close_image(image);
tf = -1;
/* -------------------------------------------------------------
* Place the image in its original size with OPI 2.0 information
* attached
* -------------------------------------------------------------
*/
/* Load the image with the option list for OPI 2.0 information */
image = p.load_image("auto", imagefile, optlist20);
if (image == -1)
throw new Exception("Error: " + p.get_errmsg());
/* Start page 2 */
p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
p.fit_image(image, x, y, "scale=0.5");
tf = p.add_textflow(tf, "", "font=" + font + " fontsize=12");
tf = p.add_textflow(tf,
"Option list for load_image() for OPI 2.0 information:\n\n", "");
tf = p.add_textflow(tf, optlist20, "");
p.fit_textflow(tf, llx, lly, urx, ury, "");
p.end_page_ext("");
p.close_image(image);
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");
} catch (Exception e) {
System.err.println(e.toString());
} finally {
if (p != null) {
p.delete();
}
}
}
}