From: Nick Dokos <ndokos@gmail.com>
To: emacs-orgmode@gnu.org
Subject: Re: Mathjax vs. problems with imagemagick
Date: Sun, 06 Jul 2014 17:25:30 -0400 [thread overview]
Message-ID: <87mwcm6uyd.fsf@gmail.com> (raw)
In-Reply-To: CAD-VTcHumycKQMdfT3X3T0Mb7oMcodgmsMosQrD9F1qzG4qivw@mail.gmail.com
Joseph Vidal-Rosset <joseph.vidal.rosset@gmail.com> writes:
> To convert equations from *.org into *.html, Mathjax is certainly the
> best solution but unfortunately, this solution does not work as soons
> as one need to use some texlive package convenient to produce easily
> proofs in specific format (for example if one uses bussproofs.sty of
> fitch.sty ).
>
> That is why imagemagick is useful. Unfortunately, the produced png
> images in my ltxpng/ have a very bad quality and if the browser load
> them, the result is terrible. I met already this problem and I do not
> remind what was the solution...
>
> I you have suggestions...
>
The process by which images are produced (for imagemagick: dvipng
follows a slightly different path) is to wrap the latex fragment
into a complete latex file, run pdflatex (or whatever your
org-latex-pdf-process says) to produce a pdf file and then run
the imagemagick `convert' program to produce the png.
I'd suggest that you duplicate this process by hand and see where
it goes wrong.
I usually do that by adding a (debug) call into
org-create-formula-image-with-imagemagick like this:
--8<---------------cut here---------------start------------->8---
(let ((latex-header (org-create-formula--latex-header)))
(with-temp-file texfile
(insert latex-header)
(insert "\n\\begin{document}\n"
"\\definecolor{fg}{rgb}{" fg "}\n"
"\\definecolor{bg}{rgb}{" bg "}\n"
"\n\\pagecolor{bg}\n"
"\n{\\color{fg}\n"
string
"\n}\n"
"\n\\end{document}\n")))
(org-latex-compile texfile t)
(debug) <<<<<<<<<<<<<<ADDED THIS
(if (not (file-exists-p pdffile))
(progn (message "Failed to create pdf file from %s" texfile) nil)
(ignore-errors
(if (featurep 'xemacs)
(call-process "convert" nil nil nil
"-density" "96"
"-trim"
"-antialias"
pdffile
"-quality" "100"
;; "-sharpen" "0x1.0"
pngfile)
(call-process "convert" nil nil nil
"-density" dpi
"-trim"
"-antialias"
pdffile
"-quality" "100"
;; "-sharpen" "0x1.0"
pngfile)))
--8<---------------cut here---------------end--------------->8---
I then reload the file (M-x load-file RET /path/to/org.el RET) to pick
up the modified function and proceed normally to export the file. When
the (debug) is executed, I get a debug buffer and I can examine things
like `texfile' and `dpi', using the debugger's `e' command. I then copy
the latex file named by `texfile' to some private directory and run
pdflatex on it and then (using the dpi value the debugger showed me - in
my case, it was "120.0"), I convert to png using the same command as the
function does:
cp /tmp/orgtex3771B9p.tex foo.tex
pdflatex foo.tex
convert -density 120.0 -trim -antialias foo.pdf -quality 100 foo.png
The whole thing is a bit fiddly but not really difficult: it takes more
time to explain than to do.
BTW, if you go this way, don't forget to delete the (debug) afterwards.
HTH.
--
Nick
next prev parent reply other threads:[~2014-07-06 21:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-06 8:03 Mathjax vs. problems with imagemagick Joseph Vidal-Rosset
2014-07-06 8:39 ` briangpowell .
2014-07-06 8:59 ` Joseph Vidal-Rosset
2014-07-06 21:25 ` Nick Dokos [this message]
2014-07-08 13:01 ` Joseph Vidal-Rosset
2014-07-08 13:04 ` Joseph Vidal-Rosset
2014-07-08 13:44 ` Joseph Vidal-Rosset
2014-07-11 0:59 ` Nick Dokos
2014-07-11 7:38 ` Joseph Vidal-Rosset
2014-07-11 15:59 ` Nick Dokos
2014-07-11 16:06 ` Joseph Vidal-Rosset
2014-07-11 18:05 ` Nick Dokos
2014-07-11 18:24 ` Joseph Vidal-Rosset
2014-07-28 14:36 ` Sebastien Vauban
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