I would like to create pdfs with ruby. One special need is embedding a picture into text (or a textblock), which means I need to be able to let the text flow around the image. E.g. the image should be in the rigth upper corner and the text should start left of the image and continue after the image by using the whole width of the page. How can I do this in ruby? Thank you for any suggestions!
I like the html -> pdf approach. Although it is probably not the best option (prawn is) it makes it easy to design the pdf. See this website. You could also go for the approach documented at jimneath.org.
Good luck
iText is the heavyweight that will allow you to do anything you want with PDFs you can bridge to it with jRuby.
Another option I used was driving open office (it has a ui less option which you can automate from Ruby)
Although I haven't done it myself I've seen people use a headless Open Office. You can control it from Ruby and use it to generate PDF files. You can even use an Open Office template and just fill in some elements into it.
How about having Ruby generate some LaTeX code, then use pdflatex to produce the PDF?
In the past to get print quality PDFs in Ruby, I used rtex.
It's fast too, which is a real bonus.