In one of my applications I need to merge many single PDF documents into one document, where each of the original PDFs is a page. Although many PDF libraries exist for most languages, I would like to write this myself if it's not too hard.
Is it necessary to implement a full-fledged PDF parser in order to merge PDF documents? Where and what would I start to read to find out what is needed for the task?
You can use the Debenu QuickPDF Library Lite (free) version to do it. Here is a very good example how to do it:
http://www.debenu.com/kb/merge-pdf-files-together-programmatically/
Related
We are converting a sizeable document for hosting on ReadTheDocs. We weren't happy with the simple presentation enabled by Markdown table syntax, so we coded our tables as HTML. Very nice in the HTML viewer (e.g., the end of http://manual.cytoscape.org/en/latest/Command_Line_Arguments.html).
In the PDF version generated by ReadTheDocs, each of our tables is completely missing (see page 9 on https://media.readthedocs.org/pdf/cytoscape-working-copy/latest/cytoscape-working-copy.pdf).
Have we made a mistake by coding tables as HTML? Could we have taken a different route and gotten nice tables in both HTML and PDF?
Any advice would be helpful ...
Thanks!
I have not used ReadTheDocs myself, but from reading their Getting Started guide, I assume you are using Sphinx? While Markdown supports embedding raw HTML, Sphinx does not support converting it to other formats.
You should consider moving to reStructuredText (Sphinx's native markup format), as it is much more advanced than Markdown. It can even be extended with custom directives and roles, should you need this. But be sure to first check whether reStructuredText tables offer the flexibility you require. Pandoc can convert your Markdown files to reStructuredText.
I see you are using a table to document command line options. reStructuredText supports documenting command line options using option lists. In theory, you could change how option lists are represented in the output document, but this might not be easy to accomplish, especially for PDF output using LaTeX (shameless plug: using rinohtype for PDF output should make this much easier in the future).
I wasn't able to find anything on the internet and I get the feeling that what I want is not such a trivial thing. To make a long story short: I'd like to get my hands on the underlying code that describes the PDF document of a selected area from a .pdf file. I've been looking for libraries or open source readers but couldn't find anything useful yet.
Does there exist something that might be able to accomplish my needs here or anything that might be reused (like an open source reader) to get there a little faster and not having to write everything from scratch?
You can convert a whole PDF document to PostScript using pdftops, one of the utilities from the poppler PDF rendering library.
This utility enables you to convert individual pages, which is at least a start.
If you just want to extract bitmapped images, try pdfimages from the same package. This extraction can also be restricted to individual pages.
The poppler library was originally written for UNIX-like systems, but there are a couple of windows builds available.
The open source tool from iText called iText RUPS does what you want, showing you all the PDF commands for a particular PDF and allow you to visualize the structure and relationships.
http://sourceforge.net/projects/itextrups/
Our application is receiving PDF file based on 150 pages from business line, I want to extract pages from this pdf file using lua scripts.
Any body share his experience.
Thanks
Sure, you can do this. As long as you write a Lua module that can read PDF files.
There are some Lua modules for writing PDFs, but none for reading them. No public ones, at any rate. You may want to switch to Python for this, as there are quite a few Python modules for dealing with PDFs.
You could write a Lua wrapper calling something like pdftk.
Someone knows how can I create one pdf file from multiple ppt files ?
Whether it to write script or computer program. However if it can be done with some program it will be the best.
I searched the web for something like this but I didn't get any results.
If you want to convert the PPT/PPTX files to PDF and then join those converted PDF files into a single PDF using either .NET or Java, you may try Aspose.Slides and Aspose.Pdf.Kit components.
Aspose.Slides allows you to convert the PPT/PPTX files to PDF and Aspose.Pdf.kit allows you to join the PDF files into a single PDF. Please see if this solution can work for your scenario.
Disclosure: I work as developer evangelist at Aspose.
I want to generate a technical report from lisp (AllegroCL in my case) and I studied various packages/project to help me do this.
Requirements:
Need to generate a PDF
May create an intermediate format like RTF, Restructured TEXT, HTML, Word DOC or Latex
Need to be flexible to be able to add content throughout my application
Need to handle Multi-Page, Headers, Footers, Tables, inclusion of Images.
Possibilities:
cl-pdf and cl-typesetting: I checked this one out and it works for now, but is there a better alternative?
Some Latex generator, but ???
Question:
Do you know alternatives to easily generate (PDF) reports from lisp. What is the best workflow to go for?
we are using cl-pdf and cl-typesetting for the last 3 years and it has numerous issues... (like its confusion around encodings, or silently not rendering things that don't fit, or...) so, i don't recommend new development based on them.
currently we are in the process of moving all our export mechanisms to open document format. openoffice is all happy with it, and there's a plugin for ms office, too.
there's .fodt, the so called flat open document text format, which is a mere xml file describing a document. generating it is as easy as generating xml files.
you can also make parts of your document read-only with a password (insert a section and mark it read-only and protected by a password. when generating the xml, you can generate random hashes as password...).