ICEpdf
  1. ICEpdf
  2. PDF-258

Problem Rendering CCITTFax images

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 4.1.4
          • Fix Version/s: 4.2
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description

            A client has sent in two confidential files which contain document scans saved using different CCITTFax encodings. ICEpdf can't seem to render the images, I suspect the files are encoded using the same PDF generator but there are no clues either way.

            The images render either white or black and there are no exceptions in the logs.

              Activity

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              Patrick Corless created issue -
              Patrick Corless made changes -
              Field Original Value New Value
              Salesforce Case [5007000000FafB1]
              Patrick Corless made changes -
              Fix Version/s 4.2 [ 10243 ]
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #24116 Wed Mar 09 19:08:52 MST 2011 patrick.corless PDF-258 updated the CCITTFax logic to first try JAI loading with header insertion followed by the normal CCITTfax algorithm. This procedure addresses a few problomatic fax images.
              Files Changed
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/filters/CCITTFax.java
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/Stream.java
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              Patrick Corless added a comment -

              I got a poke form Support to take another look at this one. On closer inspection we could load this PDF correctly prior to the 4.1.0 CCITTFax updates. Our older CCITTFaxDecoder class does some funky stuff to try and load propert TIFF image header information which is used by JAI to load the image.

              It turns out that the header work and JAI can load the image. I adjust the stream class to first try and load the fax with JAI and upon failure will fill use the newer CCITTFax code which for the most part does a pretty good job at handling 4.1, 4.2 and 6 compression.

              Show
              Patrick Corless added a comment - I got a poke form Support to take another look at this one. On closer inspection we could load this PDF correctly prior to the 4.1.0 CCITTFax updates. Our older CCITTFaxDecoder class does some funky stuff to try and load propert TIFF image header information which is used by JAI to load the image. It turns out that the header work and JAI can load the image. I adjust the stream class to first try and load the fax with JAI and upon failure will fill use the newer CCITTFax code which for the most part does a pretty good job at handling 4.1, 4.2 and 6 compression.
              Patrick Corless made changes -
              Fix Version/s 4.2 [ 10243 ]
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              Patrick Corless added a comment -

              Closing issue.

              Show
              Patrick Corless added a comment - Closing issue.
              Patrick Corless made changes -
              Status Open [ 1 ] Resolved [ 5 ]
              Resolution Fixed [ 1 ]
              Ken Fyten made changes -
              Status Resolved [ 5 ] Closed [ 6 ]

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  Dates

                  • Created:
                    Updated:
                    Resolved: