ICEpdf
  1. ICEpdf
  2. PDF-350

Enhance transparency groups implementation to avoid loss of render quality.

          Details

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

            Description

            A few releases ago basic support for transparency group support was added. Mainly transparency support for a group of shapes and knockouts.

            The current implementation will detect a transparency group flag on the form object. If detected painting is deferred and the shapes painted to image so that a transparency group can be applied. The problem with this approach is that image will look blurred as document zoom is applied.

            It may be possible to spawn a new graphics context with g2d.createGraphics() in a similar but alternative means to creating the image. A little bit of research needs to be done here.

              Issue Links

              blocks

              Bug - A problem which impairs or prevents the functions of the product. PDF-289 Transparency grouping on colour space support

              • Major - Major loss of function.
              • Closed

              Bug - A problem which impairs or prevents the functions of the product. PDF-373 Error clipping or specifying alpha in jpeg encoded images.

              • Major - Major loss of function.
              • Closed

              Bug - A problem which impairs or prevents the functions of the product. PDF-417 Loss of color on generated images

              • Major - Major loss of function.
              • Closed

                Activity

                Repository Revision Date User Message
                ICEsoft Public SVN Repository #30260 Wed Jul 25 17:41:45 MDT 2012 patrick.corless PDF-350 addition of property org.icepdf.core.disableTransparencyGroup to enable user to turn off transparency group support when raster quality is too low.
                Files Changed
                Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/util/ContentParser.java
                Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/graphics/Shapes.java

                  People

                  • Assignee:
                    Patrick Corless
                    Reporter:
                    Patrick Corless
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                    Dates

                    • Created:
                      Updated: