images/add_opi_info
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
partners.adobe.com/public/developer/en/ps/5660_OPI_2_0.pdf.
Download Java Code Show Output PDF
* 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 7
* 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_parameter("SearchPath", searchpath);
/* This means we must check return values of load_font() etc. */
p.set_parameter("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: 1.2.4.1 $");
/* 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();
}
}
}
}