ICEpdf
  1. ICEpdf
  2. PDF-249

IText 5.03 incorrectly specifying CCITTFax image K value

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 4.1.2
          • Fix Version/s: 4.1.3
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description

            Recently we've been seeing quite a few malformed PDF documents generated with iText. In this particular case the CCITTFax image is encoded with the wrong K value and as a result we don't decode the image using the correct algorithm.

              Activity

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              Ken Fyten made changes -
              Status Resolved [ 5 ] Closed [ 6 ]
              Arran Mccullough made changes -
              Salesforce Case [5007000000EUK1g]
              Patrick Corless made changes -
              Status Open [ 1 ] Resolved [ 5 ]
              Resolution Fixed [ 1 ]
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              Patrick Corless added a comment -

              Added a try catch around the code that matches a K value to a ccittfax algorithm. If an error occurs while decoding the image the fall back code will try the T6 algorithm as a last resort. The PDF in question has the wrong K value but using T6 renders the image. This fix is a work around for the iText encoding issue.

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              Patrick Corless added a comment - Added a try catch around the code that matches a K value to a ccittfax algorithm. If an error occurs while decoding the image the fall back code will try the T6 algorithm as a last resort. The PDF in question has the wrong K value but using T6 renders the image. This fix is a work around for the iText encoding issue.
              Patrick Corless made changes -
              Field Original Value New Value
              Salesforce Case []
              Fix Version/s 4.1.3 [ 10257 ]
              Patrick Corless created issue -
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #23753 Mon Jan 10 07:48:03 MST 2011 patrick.corless PDF-249 added fall back code to the ccittfax k value algorithm selection code. If an error occurs during decode the exception is caught and the T6 algorithm is used to decode the image as a last resort. This address some iText mailformed PDFs.
              Files Changed
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/Stream.java

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  Dates

                  • Created:
                    Updated:
                    Resolved: