If you use PdfSmartCopy, you at least won't get duplicates from the same
document. However, iText doesn't currently look to see if it has (for
example) two identical copies of a font from separate files.

It might be easier to come up with a separate utility to go over a given
PDF and remove redundant objects, and fix up references to them. Not
easy, but quite possible.

Ugh.. My initial thought was to build a hash for each object in a PDF,
and look closely at hash matches to find duplicates. But it won't work.
XObject A might be identical to XObject B, save that they reference
different copies of the same image. A single pass hash of their
toString output would not catch the match, though it would remove the
redundant image. Multiple passes would be necessary until a pass found
no matches. Not Efficient at all, but serviceable.

You might end up with a resource directory that had several aliases for
the same font/image/whatever, but I could live with that.


--Mark Storer
Senior Software Engineer
Cardiff.com

import legalese.Disclaimer;
Disclaimer<Cardiff> DisCard = null;



> -----Original Message-----
> From: mukkakishore@(protected)]
> Sent: Thursday, September 02, 2010 2:28 AM
> To: itext-questions@(protected)
> Subject: [iText-questions] iText combine size large and
> fonts/backgroundsduplicated
>
> Hello Everyone,
>
> We have an issue with huge size of combined PDF File using iText.
>
> We have written a logic to combine the pdf files using iText
> and we observed that, iText Combines PDF successfully. But,
> not removing duplicate fonts, backgrounds.
>
> We tried to perform the same merge using Adobe Standard
> version. The size out of it is 2 MB for 200 files.
>
> But, the same for iText Merge is 15MB. So,we missed something
> and upon investigation, we found that, it is with duplicate
> fonts and backgrounds. Adobe does a consolidation of
> duplication of fonts and page backgrounds.
>
> Our source of pdf files are output from a Single Crystal
> Report. Users will be combining these reports based on their
> requirement from the Crystal Output files. So, there is a
> single type of Crystal Report output in PDF format.
>
> Could you please advise, if we have any Class/function to do this.
>
> Thank you
> Kishore Mukka
>
> --
> This message was sent on behalf of mukkakishore@(protected)
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> http://www.opensubscriber.com/message/itext-questions@(protected)
urceforge.net/5762681.html
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You can also search the keywords list: http://1t3xt.info/tutorials/keywords/