One of the requirements for IPPFAX is that the data format be
"pseudo-streamable" so that a receiver would not have to parse the entire
file before being able to render the first page. The group agreed that
allowing random access for no more than a page worth of data at a time would
be acceptable. However, in the sample JBIG-2 encoded pdf file you posted, it
would seem that a parser would have to jump all the way to the end of the
file to read the trailer dictionary first so that it can accurately
interpret all the indirect objects at the front of the file. In section
3.4.4 of the PDF Reference, it even states, "Applications should read a PDF
file from its end."
Is it possible for a parser to still accurately interpret the page &
resource objects without having first traversed the file trailer and catalog
dictionary? Or would linearized PDF be the only other feasible alternative?
This archive was generated by hypermail 2b29 : Wed Jul 31 2002 - 22:34:33 EDT