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  1. PDFBox
  2. PDFBOX-1233

CCITTFaxG31DDecodeInputStream - Extended codes have wrong length

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.7.0
    • Component/s: None
    • Labels:
      None

      Description

      When dealing with large fax images there are Extended Make Up Codes.
      They are added to the tree as ...

      buildUpMakeUp(LONG_MAKE_UP, WHITE_LOOKUP_TREE_ROOT);
      buildUpMakeUp(LONG_MAKE_UP, BLACK_LOOKUP_TREE_ROOT);

      Accept, the length is 0 based not starting at 1792.

      The quick hack is to create a new method so the length of the node is correct

      private static void buildUpMakeUpLong(short[] codes,
      NonLeafLookupTreeNode root)
      {
      for (int len = 0, c = codes.length; len < c; len++)

      { LookupTreeNode leaf = new MakeUpTreeNode((len + 28) * 64); addLookupTreeNode(codes[len], root, leaf); }

      }

      as thus ...

      buildUpMakeUpLong(LONG_MAKE_UP, WHITE_LOOKUP_TREE_ROOT);
      buildUpMakeUpLong(LONG_MAKE_UP, BLACK_LOOKUP_TREE_ROOT);

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            • Assignee:
              lehmi Andreas Lehmkühler
              Reporter:
              dave.smith Dave Smith
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              • Created:
                Updated:
                Resolved: