Changes

2.2

o Keeps was_linearized flag with every loaded PDF
o Can count the number of revisions in a PDF, and load a specified revision

2.1 (November 2014)

Technical

o Excised linearization. We recommend qpdflib / qpdf for this task now.
o Encryption now performed by fast C routines, replacing the OCaml ones
o Faster parsing of delayed object streams on large files
o New implementation of Pdf.page_reference_numbers. More robust
o Faster parsing by using better primitive operations for I/O
o Tighter spacing of output in Pdfwrite leading to smaller files
o Fixed pdf_of_pages not to produce duplicate page objects when multiple parts
of the output pdf come from the same input pdf
o Pdfpagelabels bug fixes, especially to alphabetic labels
o Read StemV etc. values from the AFM header directly
o Object streams may be written uncompressed for manual inspection
o Recrypting overhauled. Now a first class citizen.

1.7 (30th August 2013)

There have been significant changes to the API. Changes for the next released
version (1.8) will be less significant. Thereafter, all changes will be
backward-compatible.

Technical

o Support for writing with object streams
o AES256ISO encryption support
o More compact writing of files
o Support for reading many malformed files

Other

o Now under a standard LGPL license
o Has no dependencies
o First import into git for use with GitHub for open development
o Support for ocamlfind