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https://issues.apache.org/jira/browse/PDFBOX-2765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14503485#comment-14503485
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Tilman Hausherr commented on PDFBOX-2765:
-----------------------------------------
Exposing private implementation is a somewhat controversial topic here... are
you using this optimizing trick on existing PDF files, or on PDF files created
with PDFBox? It shouldn't happen with PDFBox.
> Add method to subset fonts for document pre-save
> ------------------------------------------------
>
> Key: PDFBOX-2765
> URL: https://issues.apache.org/jira/browse/PDFBOX-2765
> Project: PDFBox
> Issue Type: New Feature
> Components: Writing
> Affects Versions: 2.0.0
> Reporter: Jesse Long
> Priority: Minor
>
> I have a custom COSWriter which compresses all streams and runs a SHA1 sum
> over each object, only writing one instance of each object with the same SHA1
> sum.
> This really helps compress PDFs.
> I use this by calling MyCustomCOSWriter.write(PDDocument);
> The trouble is that I have no way of calling the font subsetting that happens
> in PDDocument.save().
> Could we have a method to perform that font subsetting manually?
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