pages/page_colors
List all color spaces.
Download Java Code Show Output Show Input PDF
import com.pdflib.pCOS;
import com.pdflib.pCOSException;
import com.pdflib.cookbook.pcos.pcos_cookbook_example;
/**
* List colorspaces.
* <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_colors.java,v 1.3 2007/09/20 14:45:04 stm Exp $
*/
public class page_colors 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,
/* 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 pagecount = (int) p.get_number(doc, "length:pages");
for (int page = 0; page < pagecount; page++) {
print_colorspaces(p, doc, page);
}
p.close_document(doc);
}
/**
* Print the colorspaces for a given page number.
*
* @param p
* pCOS object
* @param doc
* Document handle
* @param page
* Page number
*
* @throws pCOSException
*/
private void print_colorspaces(pCOS p, int doc, int page)
throws pCOSException {
int colorspacecount = (int) p.get_number(doc,
"length:pages[" + page + "]/colorspaces");
if (colorspacecount > 0) {
System.out.println("Page " + (page + 1));
System.out.print(" " + colorspacecount + " color space");
if (colorspacecount != 1) {
System.out.print("s");
}
if (colorspacecount > 0) {
System.out.print(":");
}
System.out.println();
for (int i = 0; i < colorspacecount; i++) {
String page_colorspace_path =
"pages[" + page + "]/colorspaces[" + i + "]";
print_colorspace(p, doc, page_colorspace_path);
}
}
}
/**
* Print information about a single colorspace of a page.
*
* The pCOS path for the colorspace is expected as
* "pages[i]/colorspaces[j]", with i being the page number and j being the
* number of the colorspace on that page.
*
* @param p
* pCOS object
* @param doc
* Document handle
* @param page_colorspace_path
* The pCOS path to the colorspace of interest
*
* @throws pCOSException
*/
private void print_colorspace(pCOS p, int doc, String page_colorspace_path)
throws pCOSException {
String colorspace = p.get_string(doc, page_colorspace_path + "/name");
System.out.println(" " + colorspace);
int componentcount = (int) p.get_number(doc, "length:"
+ page_colorspace_path + "/components");
System.out.println(" " + componentcount + " component"
+ (componentcount > 1 ? "s" : ""));
if (colorspace.equals("Separation")) {
String colorant =
p.get_string(doc, page_colorspace_path + "/colorantname");
System.out.println(" colorant \"" + colorant + "\"");
}
else if (colorspace.equals("DeviceN")) {
int colorantcount = (int) p.get_number(doc, "length:"
+ page_colorspace_path + "/colorantnames");
System.out.println(" colorants:");
for (int j = 0; j < colorantcount; j += 1) {
System.out.println(" \""
+ p.get_string(doc,
page_colorspace_path + "/colorantnames[" + j + "]")
+ "\"");
}
}
else if (colorspace.equals("Indexed")) {
int baseid = (int) p.get_number(doc,
page_colorspace_path + "/baseid");
System.out.println(" base color space: " +
p.get_string(doc, "colorspaces[" + baseid + "]/name"));
}
}
public page_colors(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_colors example = new page_colors(argv, "Colorspaces per page",
SEARCH_PATH, "$RCSfile: page_colors.java,v $", "$Revision: 1.3 $");
example.execute();
}
}