On Wed, 7 Jul 2010 10:06:15 +0200, Rainer M Krug <r.m.krug@gmail.com> wrote:
> 
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> Hi
> 
> I created the attached latex.org based on the example with pgf/tikz and it
> exports fine into a pdf. But export to html causes the problem, that I get
> only a link to the created graph. If I change :file to :file fsa.png, an
> image is included but it is a) very small and b) nearly completely black.
> 
> I guess, it has to do with the size of the png - but how can I change it?
> :width and :height do not seem to have any impact.

Rainer,

one approach could be to allow latex to create the PDF and the convert
(using the shell, say) the PDF to a PNG and include that:

--8<---------------cut here---------------start------------->8---
#+begin_src latex :file fsa.pdf :packages '(("" "tikz"))

[...]

#+end_src
#+begin_src sh
  convert -density 300 fsa.pdf fsa.png
#+end_src

#+attr_html: width=50%
  [[file:./fsa.png]]
--8<---------------cut here---------------end--------------->8---

This works.  However, my babel knowledge is not up to speed so I don't
know how to tell it to not output anything in the HTML document for
the two babel snippets (latex and sh).  If you know how, let me know!

HTH,
eric