Apache PDFBox Extract Embedded Font to PDF Document
This tutorial demonstrates how to extract an embedded font from a PDF document using Apache PDFBox.
Maven Dependencies
We use Apache Maven to manage our project dependencies. Make sure the following dependencies reside on the class-path.
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>2.0.8</version>
</dependency>Apache PDFBox Extract Embedded Font to PDF Document
The following application extracts all fonts embedded inside a PDF document.
package com.memorynotfound.pdf.pdfbox;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.io.IOUtils;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDResources;
import org.apache.pdfbox.pdmodel.common.PDStream;
import org.apache.pdfbox.pdmodel.font.*;
import org.apache.pdfbox.pdmodel.graphics.PDXObject;
import org.apache.pdfbox.pdmodel.graphics.form.PDFormXObject;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
public class ExtractEmbeddedFonts {
private static final String OUTPUT_DIR = "/tmp/";
public static void main(String[] args) throws Exception{
String filePath = "/tmp/embedded-font.pdf";
try (final PDDocument document = PDDocument.load(new File(filePath))){
for (PDPage page : document.getPages()) {
PDResources resources = page.getResources();
processResources(resources);
}
} catch (IOException e){
System.err.println("Exception while trying to read pdf document - " + e);
}
}
private static void processResources(PDResources resources) throws IOException {
if (resources == null) {
return;
}
for (COSName key : resources.getFontNames()) {
PDFont font = resources.getFont(key);
if (font instanceof PDTrueTypeFont) {
writeFont(font.getFontDescriptor(), font.getName());
} else if (font instanceof PDType0Font) {
PDCIDFont descendantFont = ((PDType0Font) font).getDescendantFont();
if (descendantFont instanceof PDCIDFontType2) {
writeFont(descendantFont.getFontDescriptor(), font.getName());
}
}
}
for (COSName name : resources.getXObjectNames()) {
PDXObject xobject = resources.getXObject(name);
if (xobject instanceof PDFormXObject) {
PDFormXObject xObjectForm = (PDFormXObject) xobject;
PDResources formResources = xObjectForm.getResources();
processResources(formResources);
}
}
}
private static void writeFont(PDFontDescriptor fd, String name) throws IOException {
if (fd != null) {
PDStream ff2Stream = fd.getFontFile2();
if (ff2Stream != null) {
String fontFile = OUTPUT_DIR + name + ".ttf";
try (FileOutputStream fos = new FileOutputStream(new File(fontFile))) {
System.out.println("Writing font:" + fontFile);
IOUtils.copy(ff2Stream.createInputStream(), fos);
}
}
}
}
}Demo
When we run the application. The embedded font is extracted from the PDF document.
References
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