Hi,
I'm trying to get embedding of indirect fonts working with PDFNet.
As a test case I have exported a PDF from OpenOffice with 2 different font choices (attached with the mail). The PDF displays fine in Acrobat reader and Acrobat reports that all three fonts are embedded.
I then strip the fonts using code found in the PDFNet knowledge base:
---snip---
PDFDoc doc = new PDFDoc("test.pdf");
doc.initSecurityHandler();
SDFDoc cos_doc = doc.getSDFDoc();
long num_objs = cos_doc.xRefSize();
for (int i=1; i < num_objs; ++i) {
Obj obj = cos_doc.getObj(i);
if (obj!=null && !obj.isFree()&& obj.isDict()) {
// Process only Fonts
DictIterator itr = obj.find("Type");
if ( ! itr.hasNext() || ! "Font".equals(itr.value().getName()) )
continue;
log.info("Found font: " + itr.value().getName());
itr = obj.find("FontDescriptor");
if ( ! itr.hasNext() )
continue;
if ( ! itr.value().isDict() )
continue;
Obj fd = itr.value();
fd.erase("FontFile");
fd.erase("FontFile2");
fd.erase("FontFile3");
}
}
doc.save("stripped.pdf", 0, null);
doc.close();
---snap---
When I open the resulting PDF file in Acrobat it displays a bunch of boxes instead of the text and also displays a warning that it couldn't find the first of the 2 fonts.
Question: Shouldn't Acrobat find the font installed on my system and use it to render the text?
I then proceed to re-embed the fonts, again with code found in the knowledge base:
--snip---
fontMap.put("BAAAAA+BitstreamVeraSans-Roman", "/usr/share/fonts/truetype/ttf-bitstream-vera/Vera.ttf");
fontMap.put("CAAAAA+BitstreamVeraSerif-Roman", "/usr/share/fonts/truetype/ttf-bitstream-vera/VeraSe.ttf");
PDFDoc doc = new PDFDoc("stripped.pdf");
doc.initSecurityHandler();
PageIterator pageItr = doc.getPageIterator();
while (pageItr.hasNext()) {
Page page = (Page) pageItr.next();
Obj res = page.getResourceDict();
if (res != null) {
Obj fonts = res.findObj("Font");
DictIterator itr = fonts.getDictIterator();
while (itr.hasNext()) {
Obj fnt_dict = itr.value();
Font font = new Font(fnt_dict);
if (font.isEmbedded()) {
continue;
}
StdFile embedFile = new StdFile(fontMap.get(font.getName()), StdFile.e_read_mode);
FilterReader myStream = new FilterReader(embedFile);
Obj fontStream = doc.createIndirectStream(myStream);
fontStream.putNumber("Length1", embedFile.fileSize());
font.GetDescriptor().put("FontFile2", fontStream);
itr.next();
}
}
}
doc.save("embedded.pdf", 0, null);
doc.close();
---snap---
This results in a slight change of the boxes and the error message about the missing font disappers. Acrobat Reader says all fonts are embedded, but I still only see boxes where there previously was text.
What am I doing wrong here? I'm trying this on a Ubuntu box.
BTW: The stripped file is marginally bigger than the original test file whereas the reembedded file is almost 10 times larger.
Regards,
Viktor Rosenfeld
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iSquare GmbH
Entwicklung
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Tel.: 030 / 44 35 09-21
Fax.: 030 / 44 35 09-29
Mail: mathias.peters@isquare.de
Web: www.iSquare.de
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