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

          Activity

            People

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

              • Created:
                Updated:
                Resolved: