precomp-cpp icon indicating copy to clipboard operation
precomp-cpp copied to clipboard
verified publisher icon schnaader

Support more PDF filters

Open schnaader opened this issue 10 years ago • 1 comments

Good explanation of filters, cascades and a list of available filters: http://blog.didierstevens.com/2008/05/19/pdf-stream-objects/

FlateDecode is already implemented

  • Most important ones would be ASCII85Decode and LZWDecode
  • Implementing cascades would be nice, but I'm not sure how common they are
  • CCITTFaxDecode is very common, but probably hard to implement

schnaader avatar Jan 07 '16 09:01 schnaader

For ASCII85Decode, there's code in paq8pxd that can be used as a reference. It might be possible to modify/extend some of the Base64 routines in Precomp for it.

schnaader avatar Jan 24 '18 14:01 schnaader