pages/page_colors
List all color spaces.
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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 3.x, PDFlib+PDI/PPS 7.x, TET 2.2,
* PLOP 3.x) <br>
* Required data: PDF document
*
* @version $Id: page_colors.java,v 1.8 2010/10/27 07:48:02 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.pcos_get_string(doc, "filename"));
int pagecount = (int) p.pcos_get_number(doc, "length:pages");
for (int page = 0; page < pagecount; page++) {
analyze_colorspaces(p, doc, page);
}
p.close_document(doc);
}
/**
* Analyze and print the colorspaces for a given page number.
*
* @param p
* pCOS object
* @param doc
* Document handle
* @param page
* Page number
*
* @throws pCOSException
*/
private void analyze_colorspaces(pCOS p, int doc, int page)
throws pCOSException {
int colorspacecount = (int) p.pcos_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++) {
analyze_colorspace(p, doc, 0,
"pages[" + page + "]/colorspaces[" + i + "]");
}
}
}
/**
* Analyze and print information about a single colorspace.
*
* @param p
* pCOS object
* @param doc
* Document handle
* @level
* Recursion level, used for indenting
* @param page_colorspace_path
* The pCOS path to the colorspace of interest
*
* @throws pCOSException
*/
private void analyze_colorspace(pCOS p, int doc, int level, String colorspace_path)
throws pCOSException {
String prefix = get_prefix(level);
String colorspace = p.pcos_get_string(doc, colorspace_path + "/name");
System.out.println(prefix + " " + colorspace);
int componentcount = (int) p.pcos_get_number(doc, "length:"
+ colorspace_path + "/components");
System.out.println(prefix + " " + componentcount + " component"
+ (componentcount > 1 ? "s" : ""));
if (colorspace.equals("ICCBased")) {
System.out.println(prefix + " number of ICC channels: "
+ (int) p.pcos_get_number(doc, colorspace_path
+ "/csarray[1]/N"));
System.out.println(prefix + " size of ICC profile in bytes: "
+ (int) p.pcos_get_number(doc, colorspace_path
+ "/csarray[1]/Length"));
}
else if (colorspace.equals("Lab")) {
System.out.print(prefix + " WhitePoint: ");
for (int j = 0; j < 3; j += 1) {
System.out.print(p.pcos_get_number(doc, colorspace_path
+ "/csarray[1]/WhitePoint[" + j + "]")
+ " ");
}
System.out.println();
}
else if (colorspace.equals("CalGray") || colorspace.equals("CalRGB")) {
System.out.print(prefix + " WhitePoint: ");
for (int j = 0; j < 3; j += 1) {
System.out.print(p.pcos_get_number(doc, colorspace_path
+ "/csarray[1]/WhitePoint[" + j + "]")
+ " ");
}
System.out.println();
}
else if (colorspace.equals("Separation")) {
String colorant = p.pcos_get_string(doc, colorspace_path
+ "/colorantname");
System.out.println(prefix + " colorant \"" + colorant + "\"");
int alternateid = (int) p.pcos_get_number(doc, colorspace_path
+ "/alternateid");
System.out.println(prefix + " alternate color space:");
analyze_colorspace(p, doc, level + 1, "colorspaces[" + alternateid + "]");
}
else if (colorspace.equals("DeviceN")) {
int colorantcount = (int) p.pcos_get_number(doc, "length:"
+ colorspace_path + "/colorantnames");
System.out.println(prefix + " colorants:");
for (int j = 0; j < colorantcount; j += 1) {
System.out.println(prefix + " \""
+ p.pcos_get_string(doc, colorspace_path
+ "/colorantnames[" + j + "]") + "\"");
}
int alternateid = (int) p.pcos_get_number(doc, colorspace_path
+ "/alternateid");
System.out.println(prefix + " alternate color space:");
analyze_colorspace(p, doc, level + 1, "colorspaces[" + alternateid + "]");
}
else if (colorspace.equals("Indexed")) {
int palettesize = (int) p.pcos_get_number(doc, colorspace_path
+ "/csarray[2]");
System.out.println(prefix + " palette size: " + palettesize);
int baseid = (int) p.pcos_get_number(doc, colorspace_path
+ "/baseid");
System.out.println(prefix + " base color space: ");
analyze_colorspace(p, doc, level + 1, "colorspaces[" + baseid + "]");
}
}
/**
* Get a prefix string consisting of spaces that can be used to indent
* lines.
*
* @param level
* indentation level
* @return
* indentation string
*
* @throws pCOSException
*/
private String get_prefix(int level) {
StringBuilder prefix = new StringBuilder();
for (int i = 0; i < level; i += 1) {
prefix.append(" ");
}
return prefix.toString();
}
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: 1.8 $");
example.execute();
}
}