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https://issues.apache.org/jira/browse/PDFBOX-4043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16299860#comment-16299860
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Tilman Hausherr commented on PDFBOX-4043:
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No, because this is very specific to the process of extracting pattern images.
PDFGraphicsStreamEngine is really just a minimal thing that must be subclassed
by users, and then you'd have to look at PageDrawer.java and copy & paste what
you like, or do your own.
What my change did was to have a look at the current colorspace when doing
stroke / fill operations. Some people don't need that at all, e.g. people who
just need the shapes of vector operations.
> ExtractImages doesn't extract images from PDPatterns
> ----------------------------------------------------
>
> Key: PDFBOX-4043
> URL: https://issues.apache.org/jira/browse/PDFBOX-4043
> Project: PDFBox
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 2.0.8
> Reporter: Arjohn Kampman
> Assignee: Tilman Hausherr
> Fix For: 2.0.9, 3.0.0 PDFBox
>
> Attachments: Angular-win2pdf.pdf
>
>
> The ExtractImages tool (or the underlying PDFGraphicsStreamEngine) doesn't
> extract images from PDPattern objects, even if they are shown on the page.
> We've found that Win2PDF stores images in such patterns. I have attached a
> sample file that this tool has generated from the Angular website. The sample
> clearly shows many images, but ExtractImages finds none of these.
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