Re: [O] Block level specification for tex code html export method

[Andreas Leha]

Hi Haochen,

You can render svg from latex through org directly.  Here is a complete
example including a tikz diagram that that works on my system (once I
tackle a bug in PGF [1]).
It renders
- png by default (and for inlining the image into the org document)
- nothing for latex (directly include the tikz code into the tex document)
- svg for html


--8<---------------cut here---------------start------------->8---
#+LATEX_HEADER: \usepackage{tikz}

First execute the second code block, to define the convenience macro
and to set the required new variables in ob-latex.el.  Then export to
HTML and to pdf to see the tree exported as an SVG image and as
embedded tikz respectively.

* Tikz test
Here's a tree, exported to both html and pdf.

#+header: :file (by-backend (html "tree.svg") (latex "tree.tikz") (t 
"tree.png"))
#+header: :imagemagick :iminoptions -density 600 :imoutoptions -geometry 800
#+header: :results file raw
#+header: :fit yes
#+begin_src latex
  \usetikzlibrary{trees}
  \begin{tikzpicture}
    \node [circle, draw, fill=red!20] at (0,0) {1}
    child { node [circle, draw, fill=blue!30] {2}
      child { node [circle, draw, fill=green!30] {3} }
      child { node [circle, draw, fill=yellow!30] {4} }};
  \end{tikzpicture}
#+end_src

#+results:
[[file:tree.png]]

* COMMENT setup
#+begin_src emacs-lisp :results silent
  (setq org-babel-latex-htlatex "htlatex")
  (defmacro by-backend (&rest body)
    `(case (if (boundp 'backend) (org-export-backend-name backend) nil) ,@body))
#+end_src
--8<---------------cut here---------------end--------------->8---


Regards,
Andreas

[1] http://tex.stackexchange.com/a/232739


Haochen Xie <address@hidden> writes:
> Hi Fabrice,
>
> Thank you for mentioning dvisvgm. I did some researches on it, and it seems 
> that as for now, the only way to invoke dvisvgm is to first export the latex 
> part to dvi, and call dvisvgm
> manually to convert it to svg, then include it in the org file, which, is too 
> troublesome for me. Is there any plan to add dvisvgm as an alternative to 
> dvipng and imagemagick? IMO svg
> images will look much better than png (well, in browsers supporting it), so 
> that's a nice option to have.
>
> Regards,
>
> Haochen
>
> --
>
> Mail from Haochen Xie
>
> On Tue, Aug 11, 2015 at 5:53 PM, Fabrice Popineau <address@hidden> wrote:
>
>
>  2015-08-11 10:47 GMT+02:00 Haochen Xie <address@hidden>:
>
>
>  Hi Andreas,
>
>  Thank you for your reply. I've read the whole thread, and found your
>  example (the second link) very useful. Although for some reason, SVG
>  image is not working well on my machine (not being displayed in
>  chrome, nor on IE. I don't have firefox installed), but since the SVG
>  image generated by imagemagick is indeed a raster image, I don't see
>  any benefit using SVG over PNG, and exporting to PNG works perfectly.
>
>  Use dvisvgm instead of imagemagick to generate the svg file.
>
>  Fabrice