From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Cook, Malcolm" <MEC@stowers.org>
Subject: Re: Switch for exported file types when evaluating code blocks
Date: Thu, 18 Jul 2013 00:45:36 +0000
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To: 'Brett Viren' <bv@bnl.gov>, "'emacs-orgmode@gnu.org'" <emacs-orgmode@gnu.org>

>I want graphics files which are exported by evaluated code blocks to be
 >generated in a format best suited to their intended use.  For HTML I
 >want either PNG or SVG.  For LaTeX/PDF I almost always want PDF.  For
 >inline viewing in emacs I want either PNG or SVG.
 >
 >To that end I went a'googling and found this idea:
 >
 >  http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-LaTeX.html#s=
ec-4-3
 >
 >It doesn't work with my copies[1] of emacs and org-mode but I was able
 >to adapt it.  I suck at elisp so this is probably more an accomplishment
 >to me than it appears to most of you!
 >
 >In any case, here is a short org document based on the one I found above
 >in worg which shows what I ended up with:
 >
 >
 >* COMMENT setup
 >#+begin_src emacs-lisp :results silent
 >  (defmacro by-backend (&rest body)
 >    `(case (if (boundp 'backend) backend nil) ,@body))
 >#+end_src
 >
 >* A graph
 >#+header: :file (by-backend (html "graph.png") (latex "graph.pdf") (t "gr=
aph.svg"))
 >#+header: :export results
 >#+begin_src dot
 >digraph Name {
 >        tail -> head;
 >}
 >#+end_src
[Cook, Malcolm]=20

Brett,

Thanks for posting your findings.  They almost help me.

I am looking for a solution to a similar problem.

I tend to work with org-export-babel-evaluate set to nil.  Thus, my code bl=
ocks are not evaled in the context of an export.  Thus at eval time there i=
s no way of knowing what the eventual backend is going to be.

I think I need an approach that auto converts svg to png on-demand/on-the-f=
ly during export.

Has anyone come across a variation on this that works as I am suggesting?

Thanks!