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https://issues.apache.org/jira/browse/PDFBOX-89?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13912242#comment-13912242
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Tilman Hausherr commented on PDFBOX-89:
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Isn't this already there?
> Support PNG Images
> ------------------
>
> Key: PDFBOX-89
> URL: https://issues.apache.org/jira/browse/PDFBOX-89
> Project: PDFBox
> Issue Type: New Feature
> Components: Utilities, Writing
>
> [imported from SourceForge]
> http://sourceforge.net/tracker/index.php?group_id=78314&atid=552835&aid=1277052
> Originally submitted by benlitchfield on 2005-08-30 19:37.
> Support Embedding/Extracting PNG images
> Can we utilize JAI for this.
> A comment from a PDF mailing list
> Actually, PNG->PDF with full transparency is pretty
> easy.
> PNG data is ARGB - you simply split that into an
> A block and an RGB block. The RGB data goes into
> the image XObject as Flate'd data - the A block as the
> SMask for the image...
> Ben Litchfield
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