mathjax-fonts-in-latex

Allows you to use MathJax's fonts in LaTeX. Why? If you're creating diagrams in MetaPost (or any other drawing program that can use LaTeX labels) to display on a website alongside MathJax then it's nice to have the font in the diagrams match the maths font, and MathJax's version of computer modern is a much heavier weight than the one that comes with LaTeX.

Below are two screenshots of example.html with maths rendered with MathJax up the top, and a MetaPost diagram at the bottom. Note how thin the font is in the "before" diagram: this is LaTeX's default version of computer modern, which looks out of place alongside MathJax's.

Installation

make install

Then to check that it's working, run

make examples

which creates example-diagram-1.pdf and example.pdf.

example.pdf

This is how example.pdf should appear:

Usage

Add \usepackage{mathjax} to your tex file (or your texpre file for inclusion in metapost). There are two options you can set: osf which gives you old style figures in maths, and slgreek which makes the capital greek letters slanted (use \upGamma etc to get upright ones). e.g. \usepackage[osf,slgreek]{mathjax} to turn them both on.

Run make examples to make the example files: example.pdf, example-diagram-1.pdf, and example.html which displays MathJax and the diagram. If everything's working right, it should look like the "after" screenshot above.

You can use the TEX macro in metapost and configure it to load the mathjax package, as in example-diagram.mp, or you can create a file "texpre.tex":

%&latex
\documentclass[12pt]{article}
\usepackage{mathjax}
\begin{document}

And set MPTEXPRE=/path/to/texpre.tex in your shell (this also works for btex ... etex style labels).

Or you can use

defaultfont:="mathjaxr--base";
defaultscale := 12pt/fontsize defaultfont; %scale to 12pt

for plain text labels (label("foo",...).

Getting other glyphs working

I haven't gotten every possible symbol in the MathJax fonts working, just some common ones. Some I've left in the default font (e.g. the integral symbol). So here's a guide on getting other symbols to work, if they exist in the MathJax fonts.

See if the glyph you want is mentioned in the .enc files created by otftotfm, in "~/.texmf-var/fonts/enc/dvips/lcdftools/":

grep <glyphname> ~/.texmf-var/fonts/enc/dvips/lcdftools/*.enc

Glyph names: https://github.com/adobe-type-tools/agl-aglfn/blob/master/glyphlist.txt
Note: to find out which font a .enc file corresponds to, look at the last line in the file, or use grep -A1 "Command line:" ~/.texmf-var/fonts/enc/dvips/lcdftools/*.enc

If the glyph's there, make note of the hex address it's at. e.g. this fragment from a .enc file shows the glyphs in the address range 20 to 2F. The comma glyph is at the address 2C.

%20
  /space /exclam /quotedbl /numbersign /dollar /percent /ampersand /quoteright
  /parenleft /parenright /asterisk /plus /comma /hyphen /period /slash

If the glyph isn't in any .enc file, then you'll need to find out which font it comes from. You can search for the glyph in the fonts' list of supported glyphs:

otfinfo -g *.otf | grep <glyphname>

Or if you'd rather see the glyphs, you can install fntsample (e.g., sudo apt-get install fntsample) then run make fontsamples. Look through the pdfs to find out which font has the glyph.
Note: there are more MathJax fonts than the ones I've used. You can add any of the following to the FONTS list in the Makefile:

MathJax_AMS-Regular.otf          MathJax_SansSerif-Bold.otf
MathJax_Caligraphic-Bold.otf     MathJax_SansSerif-Italic.otf
MathJax_Caligraphic-Regular.otf  MathJax_SansSerif-Regular.otf
MathJax_Fraktur-Bold.otf         MathJax_Script-Regular.otf
MathJax_Fraktur-Regular.otf      MathJax_Size1-Regular.otf
MathJax_Main-Bold.otf            MathJax_Size2-Regular.otf
MathJax_Main-Italic.otf          MathJax_Size3-Regular.otf
MathJax_Main-Regular.otf         MathJax_Size4-Regular.otf
MathJax_Math-BoldItalic.otf      MathJax_Typewriter-Regular.otf
MathJax_Math-Italic.otf          MathJax_WinChrome-Regular.otf
MathJax_Math-Regular.otf         MathJax_WinIE6-Regular.otf

Once you've found the glyph in a font, save a copy of that font's .enc file as e.g. "foo.enc" and add the glyph name to one of the /.notdef spaces (remember what hex address it's at). Edit the Makefile's "install:" section so that otftotfm uses foo.enc, e.g.

otftotfm -a -e foo <font.otf> <fontname>

Add lines to mathjax.sty to make the glyph available, e.g.

\DeclareMathSymbol{,}\mathpunct{operators}{"2C}

(2C was the hex address from the enc file we found. The "operators" font was declared earlier in mathjax.sty with \DeclareSymbolFont{operators}{T1}{MathJax}{m}{n} to refer to the "MathJax" font defined as \DeclareFontShape{T1}{MathJax}{m}{n}{ <-> mathjaxr }{}, which uses "mathjaxr" created in the Makefile with the line otftotfm -a -e mathjaxr MathJax_Main-Regular.otf mathjaxr which uses the file "mathjaxr.enc" as the encoding.)

Then run make install.