ICEpdf
  1. ICEpdf
  2. PDF-240

Jbig2 regression in 4.1.1

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 4.1.1
          • Fix Version/s: 4.1.3
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description

            A user has pointed out a regression in the jbig2 support. I've looked into this issue an little closer and the claim is valid. An error check was added for empty JBIG2Global values in the Stream class which is causing the regression. The Hashtable processing block in the jbig2Decode method should instead read:

                     Hashtable decodeparms = library.getDictionary(entries, "DecodeParms");
                        if (decodeparms != null) {
                            Stream globalsStream = (Stream) library.getObject(decodeparms, "JBIG2Globals");
                            if (globalsStream != null){
                                byte[] globals = globalsStream.getDecodedStreamBytes();
                                if (globals != null && globals.length > 0) {
                                    decoder.setGlobalData(globals);
                                    globals = null;
                                }
                            }
                        }

              Activity

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              Patrick Corless added a comment -

              Checked in patch to fix jbig 2 decoding error when no decode parameters are encountered.

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              Patrick Corless added a comment - Checked in patch to fix jbig 2 decoding error when no decode parameters are encountered.

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  Dates

                  • Created:
                    Updated:
                    Resolved: