[
https://issues.apache.org/jira/browse/PDFBOX-2105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Antti Lankila updated PDFBOX-2105:
----------------------------------
Comment: was deleted
(was: I can't seem to figure out how to attach a file to this bugreport in JIRA.
https://bel.fi/alankila/pdfbox-multipagetiff.diff
is the patch I would like to attach. I'll keep it here.)
> Support for multipage TIFFs in CCITTFactory, makes PDFBox capable of doing
> tiff2pdf
> -----------------------------------------------------------------------------------
>
> Key: PDFBOX-2105
> URL: https://issues.apache.org/jira/browse/PDFBOX-2105
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel
> Reporter: Antti Lankila
> Priority: Minor
> Labels: features, patch
> Attachments: pdfbox-multipagetiff.diff
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> I created a patch based on Sergey Ushakov's work that handles multipage
> TIFFs. This allows fast and efficient conversion from TIFF to PDF
> The general approach is to provide a new factory method that accepts an image
> (page) number, and then appropriate page number is located when the CCITT
> stream is being extracted.
> There's a minor inefficiency in this approach because the seek starts from
> the beginning for each page, causing O(N^2) algorithm when extracting every
> page, but maximum size for file appears to be 2 GB and the cost for finding a
> single page will still be low, so I bet this will never come up in practice.
> There is no method that tells how many pages TIFF files have. I opted to
> simply return null from the factory method that accepts page number if there
> is no such page, so users can use this as condition to break from a TIFF to
> PDF conversion loop.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
