ICEpdf
  1. ICEpdf
  2. PDF-973

JPEG image with unknown color space encoding

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 6.1
          • Fix Version/s: 6.1.1
          • Component/s: Imaging
          • Labels:
            None
          • Environment:
            any

            Description

            The PDF in question contains many JPEG images that have a indexed colour space that is not correctly being decoded. I've spend some time looking at the data trying to make sense of it but have had no luck as of yet.

            Further investigation is needed.

              Activity

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              Patrick Corless made changes -
              Status Resolved [ 5 ] Closed [ 6 ]
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #49468 Mon Nov 07 15:39:30 MST 2016 patrick.corless PDF-973 updates to how and when we apply blending modes.
              Files Changed
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/util/content/AbstractContentParser.java
              Patrick Corless made changes -
              Status Open [ 1 ] Resolved [ 5 ]
              Resolution Fixed [ 1 ]
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              Patrick Corless added a comment -

              Fix is checked in on the 6.1 branch and trunk.

              Show
              Patrick Corless added a comment - Fix is checked in on the 6.1 branch and trunk.
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              Patrick Corless added a comment -

              As it turns out he fixing the JPEG colour issue was only a small part of the actual problem. The PDF encoder seems to be very CMYK centric as each image is actually made up of four images and is blended using multiply. The example document proved to be an excellent example in improving our blending mode support as its shows how setting an alpha composite can break the model as well as issues that can arise if blending is done too soon resulting in a black resultant image.

              The PDF in question is rendering correctly now but there are still some take aways we need to think about and hopefully we can fix a few more remaining issue with our blending mode implementation.

              Show
              Patrick Corless added a comment - As it turns out he fixing the JPEG colour issue was only a small part of the actual problem. The PDF encoder seems to be very CMYK centric as each image is actually made up of four images and is blended using multiply. The example document proved to be an excellent example in improving our blending mode support as its shows how setting an alpha composite can break the model as well as issues that can arise if blending is done too soon resulting in a black resultant image. The PDF in question is rendering correctly now but there are still some take aways we need to think about and hopefully we can fix a few more remaining issue with our blending mode implementation.
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #48597 Fri Apr 01 13:58:17 MDT 2016 patrick.corless PDF-973 updates to how and when we apply blending modes.
              Files Changed
              Commit graph MODIFY /icepdf/branches/icepdf-6.1.0/icepdf/core/src/org/icepdf/core/util/content/AbstractContentParser.java
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #48595 Fri Apr 01 10:05:08 MDT 2016 patrick.corless PDF-973 updates to how and when we apply blending modes.
              Files Changed
              Commit graph MODIFY /icepdf/branches/icepdf-6.1.0/icepdf/core/src/org/icepdf/core/pobjects/ImageUtility.java
              Commit graph MODIFY /icepdf/branches/icepdf-6.1.0/icepdf/core/src/org/icepdf/core/util/content/AbstractContentParser.java
              Commit graph MODIFY /icepdf/branches/icepdf-6.1.0/icepdf/core/src/org/icepdf/core/pobjects/ImageStream.java
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #48594 Fri Apr 01 10:04:57 MDT 2016 patrick.corless PDF-973 updates to how and when we apply blending modes.
              Files Changed
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/ImageUtility.java
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/ImageStream.java
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/util/content/AbstractContentParser.java
              Arran Mccullough made changes -
              Support Case References Support Case #13676 - https://icesoft.my.salesforce.com/5007000001YHKs0
              Patrick Corless made changes -
              Field Original Value New Value
              Fix Version/s 6.1.1 [ 12975 ]
              Patrick Corless created issue -

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  Dates

                  • Created:
                    Updated:
                    Resolved: