At 09:39 AM 2/24/2006, Petter Nyström wrote:
Hello! I am browsing the internet for code
libraries to work with PDF documents. So far, iText looks the best!
iText is an excellent library for many
things PDF - but certainly not all...
One of the basic things I want to do is to pull
images out of a PDF, let third-party software
modify these images and then plug the modified
images back into the PDF without changing the
document layout. Can iText do this?
No.
In fact, I am not aware of ANY
non-commercial library that will provide that
level of functionality (specifically the "putting
back" part - the extraction is easy).
Or to what extent can iText help me in writing my own code for doing this?
You could use iText to extract the
images, though you'd also need a VERY detailed
understanding of image handling and color
management in order to make sure that the
extracted data was in the correct form.
Depending on what types of modifications
you are going to allow the 3rd party tools to do,
it MIGHT be possible to use iText, but you'd need
to work at a very low level of PDF functionality
to find, modify and replace the relevant objects.
When I set out on my search for PDF libraries,
my highest goal was really to find a PDF parser.
I would love to find code that takes a PDF
document and turns it into a data structure
representing the elements in the PDF - i.e. a
parse tree. Then I could traverse this tree and
do whatever modifications I'd like to the nodes
therein. When finished, I'd need some code to
turn the parse tree back into a flat string - a PDF document.
There are a couple of commercial libraries that offer this feature.
Leonard
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Leonard Rosenthol <mailto:[EMAIL PROTECTED]>
Chief Technical Officer <http://www.pdfsages.com>
PDF Sages, Inc. 215-938-7080 (voice)
215-938-0880 (fax)
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