[poppler] Direct Poppler access without frontend allowed?
andreasbutti at gmail.com
Wed May 11 23:36:06 PDT 2011
Ok, I can provide my code, but I need some help to complete integrate
What I did now:
I have two PDFs, one for background and one for the foreground, like two
slides on a overhead projector, the second slide is on top of the first
slide. Sometimes there are two pages, 1 foreground and one background,
sometimes there is only one PDF.
Not all source PDFs are used always, and sometimes PDF Pages are used twice.
My code does the following:
* Extract the contents stream of the pages
* Append the stream from one page to the other page
o update all references, e.g. images and fonts, because /F1 in
one document is may not the same font than /F1 in the other
* Write outlines to the document (they have to be created by the
application, because if there are pages inserted / deleted, I
cannot use the original outlines)
* Write metadata (Creator, Autor, Creationdate etc.)
* Writeout the document to a file
o Create new XREF table
o compress the contents of the pages with GZ
My application is mostly written in C++, but I use GTK (no discussion
about this combination;-)).
So I first used the GLib frontend, but there I had problems with
searching, and I cannot access the underlying poppler objects.
The Question is now which frontend I should use.
In my opinion, the best solution is may to create a new frontend, e.g. a
Because then it's possible to change some behaviour, and add other
* Edit text within PDF documents (not add, add is no problem with
* Delete objects from a PDF (e.g. select a rectangle and delete all
objects within this rectangle)
* Copy objects
Currently there is no easy to use application which support these 3
operations for Linux.
If poppler would have such a frontend I'll may append this functionality
to Xournal++ (in the future, not now).
What do you think about this?
Am 11.05.2011 21:43, schrieb Albert Astals Cid:
> A Wednesday, May 11, 2011, Andreas Butti va escriure:
>> Hello everybody
>> I'm working on a new Xournal version (Xournal++, not yet present on a
>> webpage, only in the SVN).
>> I used Poppler to display PDF and also for PDF export, to implement the
>> PDF export (merging two PDFs together) I access Poppler without any
>> I'm working on Ubuntu, which contain all necessary headers, but other
>> distributions don't.
>> Now there is a discussion if it's allowed to access Poppler without
>> frontend, or not.
>> I thought it should be allowed, because on the poppler Wiki are also two
>> projects listed which access poppler without frontent,
>> But now I need a clear answer if it's allowed or not, and if not if
>> there is another way for me to implement this without breaking any rules.
> It is not encouraged since we reserve the right to change the API (and do so)
> at any release (minor versions included) while our API in the frontends is
> much more stable.
> If you tell us what you are missing from the public frontend API we might add
> it, or you might even contribute the code you have that uses the internal API
> so we add it to our frontend ;-)
>> Thank you for the answer.
>> poppler mailing list
>> poppler at lists.freedesktop.org
> poppler mailing list
> poppler at lists.freedesktop.org
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the poppler