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  1. PDFBox
  2. PDFBOX-993

Image transparency lost when drawing an image (during pdf to image conversion)

          Details

          • Type: Bug
          • Status: Closed
          • Priority: Minor
          • Resolution: Fixed
          • Affects Version/s: 1.5.0
          • Fix Version/s: 1.6.0
          • Component/s: None
          • Labels:

            Description

            My scenario is converting an existing PDF to an image. When the PDF contains an image with transparency the transparency is lost and the image is drawn at 100% opacity.

            This fix is related (and depends on) the issue: https://issues.apache.org/jira/browse/PDFBOX-975

            All that is needed is to set the composite of the graphics before drawing the image as specified in the graphics state (See attached patch)

            Note: line number in patch maybe off since it was created from 1.5.0 but after fixing 975.

              Attachments

              1. pdf-with-transparent-image.pdf
                45 kB
                Jesse Eichar
              2. image-transparency-and-text.patch
                2 kB
                Jesse Eichar
              3. drawImageTransparency.patch
                2 kB
                Jesse Eichar
              4. before-fix.png
                360 kB
                Jesse Eichar
              5. after-fix.png
                314 kB
                Jesse Eichar

                Activity

                  People

                  • Assignee:
                    lehmi Andreas Lehmkühler
                    Reporter:
                    jeichar Jesse Eichar
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                    Dates

                    • Created:
                      Updated:
                      Resolved: