chris writes:
>> [ ... snip ... ]
>> Solution:
>>
>> Redefine org-babel-latex-preamble to remove
>> the offending line.
>>
>> (setq org-babel-latex-preamble
>> '(lambda (_)
>> "\\documentclass[preview]{standalone}"))
>>
>> With this setup, my example
>>
>> #+header: :fit yes :headers '("\\usepackage{tikz}")
>> #+begin_src latex :exports results :results raw file :file
>> test-tikz-triangle.svg
>> \begin{tikzpicture}
>> \draw[draw=black, fill=blue!10] (0,4) -- (3,0) -- (-3,0) -- cycle;
>> \end{tikzpicture}
>> #+end_src
>>
>> exports correctly to an .svg file.
>
> Hmm, your fix works perfectly! And it's a `defcustom` variable so it's not
> even a hack.
Yes, I only thought about that afterwards.
> I guess that since you haven't selected specific method like:
> `#+header: :imagemagick yes`, the method used is `inkscape`
> (`ob-latex.el` file):
> ```
> (defcustom org-babel-latex-pdf-svg-process
> "inkscape \
> --pdf-poppler \
> --export-area-drawing \
> --export-text-to-path \
> --export-plain-svg \
> --export-filename=%O \
> %f"
> "Command to convert a PDF file to an SVG file."
> :group 'org-babel
> :type 'string
> :package-version '(Org . "9.6"))
> ```
>
I would have been, but I've got inkscape installed via Linux Mint apt
repo and it appears to be just a bit too old to have the --pdf-poppler
option. Right now, for testing, I'm just using the first thing I have at
hand that works, which is pdftocairo:
: (setq org-babel-latex-pdf-svg-process "pdftocairo -svg %f %O")
I'll probably switch to inkscape for options like not exporting text to
paths.
I also considered dvisvgm, which I use for snippet preview, but I
*think* that using xetex, I could not use dvisvgm for Babel blocks
because the Babel latex-to-svg process expects a pdf to be produced,
whereas xelatex only outputs dvi (actually an extended dvi format called
xdv) if you use the -no-pdf option. Could be wrong.
> I don't know if you use `org-latex-preview` for `tikz` snippets? Maybe you
> don't because that doesn't export to `html`.
>
> I use `(setq org-preview-latex-default-process 'dvipng)`, and I guess it
> would be nice to add an new option in `(defcustom
> org-preview-latex-process-alist` to add `inkscape`.
I imagine that's possible.
But on raw tikz snippets (not src blocks), this already works well for
me with dvisvgm. To get it working with xetex I have customized the
dvisvgm option in org-preview-latex-process-alist:
...
(dvisvgm :programs
("xelatex" "dvisvgm")
:description "xdv > svg"
:message "you need to install the programs: xetex and dvisvgm."
:image-input-type "xdv" :image-output-type "svg"
:image-size-adjust (1.7 . 1.5)
:latex-compiler ("xelatex -no-pdf -interaction nonstopmode
-output-directory %o %f")
:image-converter ("dvisvgm %f --no-fonts --exact-bbox
--scale=%S --output=%O")))
...
> So with you solution, I guess when we export to `html`, the "normal" `latex`
> formulas are rendered by `mathjax`, which works very well, and the `tikz`
> diagrams are automatically exported as a `svg` image, while the code to
> produce them is not exported.
>
> I suppose you use those `latex` code block for exporting to `html` purpose?
Yes, that's my aim.
Yours,
Christian
