I need help - I can help - Incremental updates and PDF 1.7

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Incremental updates and PDF 1.7

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=4043
Printed Date: 19 Sep 24 at 8:09PM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Incremental updates and PDF 1.7

Posted By: mLipok
Subject: Incremental updates and PDF 1.7
Date Posted: 16 Sep 24 at 10:47PM

I was in hope to use:

https://developers.foxit.com/developer-hub/document/incremental-updates/

My question is how to setup QPDF object to create PDF 1.7 and not PDF 1.4 ?

I see I can use:

SetPDFAMode

...a few minutes later...

found it ...

$DPL.SetInformation(0, '1.7')

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Here you can find description how to test my examples:
http://www.quickpdf.org/forum/forum_posts.asp?TID=2932&PID=12600&title=drawcapturedpagematrix-matrix-howto#12600

Replies:

Posted By: mLipok
Date Posted: 16 Sep 24 at 11:04PM

My primary needs is related to :
"Incremental updates are required when modifying a digitally signed PDF. Any changes to the existing bytes in the file will invalidate existing signatures, so re-writing the PDF is not an option."

But also I was exptecting that if I use incremental update it means for me "versioning".
So my further question is how I can use ACROBAT READER to switch to view each subsequent version ?

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Here you can find description how to test my examples:
http://www.quickpdf.org/forum/forum_posts.asp?TID=2932&PID=12600&title=drawcapturedpagematrix-matrix-howto#12600

Posted By: mLipok
Date Posted: 16 Sep 24 at 11:07PM

On second thought, if I have a signed PDF file in version 1.4, I won't be able to do anything with it.
I think so because the signed PDF has to be saved as a PDF in version 1.7 before it's signed.

Please let me know if I'm right.

-------------
Here you can find description how to test my examples:
http://www.quickpdf.org/forum/forum_posts.asp?TID=2932&PID=12600&title=drawcapturedpagematrix-matrix-howto#12600