[poppler] Spec question: Incremental updates and mixing XRef tables and streams
fabiodurso at hotmail.it
Mon Apr 23 09:37:34 PDT 2012
I'm trying to fix https://bugs.freedesktop.org/show_bug.cgi?id=49080.
According to my tests, it seems to me that it's not possible to incrementally-
update a document indexed by a XRef stream by appending a XRef table and
making /Prev point to the previous XRef stream (which is what poppler
currently does). In such cases acroread says:
There was an error opening this document. There was a problem reading this
OTOH, if I append a XRef stream to a document that already has an XRef table
(again, pointing it from /Prev), acroread briefly shows a "I'm recovering a
damaged document" message, but then it opens the file.
My question is whether is it allowed to mix cross-reference tables ans cross-
reference streams in the chain of incremental updates?
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