Am 20.12.2017 um 12:20 schrieb Robson Peixoto:
Hi guys,
We are using PDFBox(1.x) and Itext(4.x) to split a PDF in multiples pages. The Itext has
a very useful class, UnembedFontPdfSmartCopy, that "Makes a copy of a PDF,
unembedding all embedded fonts. All font headers and descriptors are preserved and only
the font file is removed."
How can I do it using PDFBox?
Any ideas?
There is no such utility but yes it could be done, you'd have to access
the resources (sometimes recursively, e.g. forms and patterns), then the
fonts, then go through the font dictionaries (use PDFDebugger to see
their structure, there are different ones), then find /FontFile or
/FontFile2 or /FontFile3, and remove that entry.
However this is something that is undesirable IMHO, and my help will be
minimal (I'll answer specific questions but won't write a full utility
for that). The resulting file might not always be displayed properly.
Embedding fonts is best practice, in PDF/A it is mandatory.
Tilman
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