pages/page_images
Print information about all images in the document.
Download Java Code Show Output Show Input PDF
import com.pdflib.pCOS;
import com.pdflib.pCOSException;
import com.pdflib.cookbook.pcos.pcos_cookbook_example;
/**
* Print information about all images in the document.
* <p>
* Required software: pCOS interface 3 (pCOS 2.x, PDFlib 7.x, TET 2.2,
* PLOP 3.x)<br>
* Required data: PDF document
*
* @version $Id: page_images.java,v 1.2 2007/09/19 08:45:30 stm Exp $
*/
public class page_images extends pcos_cookbook_example {
/* This is where the data files are. Adjust as necessary. */
private final static String SEARCH_PATH = "../input";
public void example_code(pCOS p, String filename) throws pCOSException, Exception {
/* Open the PDF document */
int doc = p.open_document(filename, "");
if (doc == -1)
throw new Exception("Error: " + p.get_errmsg());
System.out.println("File name: " + p.get_string(doc, "filename"));
int imagecount = 0;
int pagecount = (int) p.get_number(doc, "length:pages");
for (int page = 0; page < pagecount; page += 1) {
imagecount += print_page_image_info(p, doc, page);
}
System.out.println("Image count: " + imagecount);
p.close_document(doc);
}
private int print_page_image_info(pCOS p, int doc, int page)
throws pCOSException {
int images_on_page = (int) p.get_number(doc,
"length:pages[" + page + "]/images");
if (images_on_page > 0) {
System.out.println("Page " + (page + 1));
for (int image = 0; image < images_on_page; image += 1) {
System.out.print(" Image " + (image + 1) + ", ");
String objtype = p.get_string(doc,
"type:pages[" + page + "]/images[" + image + "]/Filter");
if (objtype.equals("name")) {
String filter = p.get_string(doc,
"pages[" + page + "]/images[" + image + "]/Filter");
System.out.print("Filter=" + filter);
}
else if (objtype.equals("array")) {
String filter = p.get_string(doc,
"pages[" + page + "]/images[" + image + "]/Filter[0]");
System.out.print("Filter=" + filter);
int filtercount = (int) p.get_number(doc,
"length:pages[" + page + "]/images[" + image + "]/Filter");
for (int f = 1; f < filtercount; f++) {
filter = p.get_string(doc,
"pages[" + page + "]/images[" + image + "]/Filter[" + f + "]");
System.out.print("+" + filter);
}
}
System.out.print(", "
+ (int) p.get_number(doc, "pages[" + page + "]/images[" + image + "]/Width")
+ "x"
+ (int) p.get_number(doc, "pages[" + page + "]/images[" + image + "]/Height")
+ ", ");
check_colorspace(p, doc, page, image);
System.out.println();
}
}
return images_on_page;
}
private static void check_colorspace(pCOS p, int doc, int page, int image)
throws pCOSException {
String objtype = p.get_string(doc, "type:pages[" + page + "]/images[" + image + "]/ColorSpace");
if (objtype.equals("name")) {
System.out.print(p.get_string(doc, "pages[" + page + "]/images[" + image + "]/ColorSpace"));
}
else if (objtype.equals("array")) {
String cs = p.get_string(doc, "pages[" + page + "]/images[" + image + "]/ColorSpace[0]");
System.out.print(cs);
if (cs.equals("Indexed") || cs.equals("Separation")) {
System.out.print(" "
+ p.get_string(doc, "pages[" + page + "]/images[" + image + "]/ColorSpace[1]"));
}
}
else if (objtype.equals("null")) {
System.out.print("ImageMask");
}
else {
System.out.print("(complex ColorSpace)");
}
}
public page_images(String[] argv, String readable_name,
String search_path, String full_rcs_file_name, String revision) {
super(argv, readable_name, search_path, full_rcs_file_name, revision);
}
public static void main(String argv[]) {
page_images example = new page_images(argv,
"Image XObjects", SEARCH_PATH,
"$RCSfile: page_images.java,v $", "$Revision: 1.2 $");
example.execute();
}
}