ICEpdf
  1. ICEpdf
  2. PDF-631

Addition of smooth scaling algorithm to ImageReferenceFactory

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 5.0.2
          • Fix Version/s: 5.0.3
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description

            When an image is drawn by the ImageReference class there is a catch for Throwable, generally the only way to get to the catch is a out of memory error. A client submited a file that looked considerably better when rendering using a restricted memory which caused the catch clause to execute.

            In this catch clause the image is scaled in size using a very simple algorithm. The interesting thing about the scale is that it uses surprising little memory and the next call to paint generally executes correctly.

              Activity

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              Patrick Corless created issue -
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              Patrick Corless added a comment -

              The algorithm is quite simple

              if (width > 1000 && width < 2000)

              { width = 1000; }

              else if (width > 2000)

              { width = 2000; }

              scaledImage = image.getScaledInstance(
              width, -1, Image.SCALE_SMOOTH);

              But the net effect can be a significant reduction in memory consumption during the paint. I expect this algorithm to be improved over time.

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              Patrick Corless added a comment - The algorithm is quite simple if (width > 1000 && width < 2000) { width = 1000; } else if (width > 2000) { width = 2000; } scaledImage = image.getScaledInstance( width, -1, Image.SCALE_SMOOTH); But the net effect can be a significant reduction in memory consumption during the paint. I expect this algorithm to be improved over time.
              Patrick Corless made changes -
              Field Original Value New Value
              Fix Version/s 5.0.3 [ 11070 ]
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              Patrick Corless added a comment -

              Update has been added to branch only at this point.

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              Patrick Corless added a comment - Update has been added to branch only at this point.
              Patrick Corless made changes -
              Status Open [ 1 ] Resolved [ 5 ]
              Resolution Fixed [ 1 ]
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #37314 Tue Aug 06 15:07:08 MDT 2013 patrick.corless PDF-631 addition of new smoothScaled image scaling algorithm.
              Files Changed
              Commit graph MODIFY /icepdf/branches/icepdf-5.0.1/icepdf/core/src/org/icepdf/core/pobjects/graphics/ImageReferenceFactory.java
              Commit graph ADD /icepdf/branches/icepdf-5.0.1/icepdf/core/src/org/icepdf/core/pobjects/graphics/SmoothScaledImageReference.java
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #37475 Wed Aug 21 13:01:07 MDT 2013 patrick.corless PDF-631 addition of new smoothScaled image scaling algorithm.
              Files Changed
              Commit graph ADD /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/graphics/SmoothScaledImageReference.java
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/graphics/ImageReferenceFactory.java
              Patrick Corless made changes -
              Status Resolved [ 5 ] Closed [ 6 ]

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  Dates

                  • Created:
                    Updated:
                    Resolved: