ICEpdf
  1. ICEpdf
  2. PDF-286

Create type 4 function results cache.

          Details

          • Type: Improvement Improvement
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 4.2
          • Fix Version/s: 4.2.2
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description

            A community memory posted a sample file that they claimed worked in 4.1.1 but not in 4.2 I took a quick look at the file in question and there is an image on the page that has a colour space that uses a type 4 function. In version 4.1.1, the image comes out blue which is incorrect. In 4.2 the image render correctly because of the type 4 function support but is extreme slow.

            The slowdown is because each colour is value is run thought the type 4 function. The function has no caching so when processing a 2 colour image we do a lot of extra work.

              Activity

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              Repository Revision Date User Message
              ICEsoft Public SVN Repository #24261 Mon Mar 28 07:42:25 MDT 2011 patrick.corless PDF-286 addition of a calculated values cache to the type 4 function logic. Greatly improved performance of function in large mapping such as apply a colour space to an image.
              Files Changed
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/functions/Function_4.java
              Patrick Corless created issue -
              Patrick Corless made changes -
              Field Original Value New Value
              Salesforce Case []
              Fix Version/s 4.2.1 [ 10265 ]
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              Patrick Corless added a comment -

              Added a calculated result cache to the type 4 function. Should have put this in in the initial release as there is significant slowdown when using an type 4 function for an image colour mask.

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              Patrick Corless added a comment - Added a calculated result cache to the type 4 function. Should have put this in in the initial release as there is significant slowdown when using an type 4 function for an image colour mask.
              Patrick Corless made changes -
              Status Open [ 1 ] Resolved [ 5 ]
              Resolution Fixed [ 1 ]
              Arran Mccullough made changes -
              Salesforce Case [5007000000GvQyA]
              Ken Fyten made changes -
              Status Resolved [ 5 ] Closed [ 6 ]

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  Dates

                  • Created:
                    Updated:
                    Resolved: