(apologies for possible multiple copies ; feel free to forward this message)
Dear all, Starting with Gecko 31 (to be released the week of July 22), the recommended fonts for the MathML rendering are mathematical fonts with an OpenType MATH table [1]. The old math fonts (e.g. MathJax TeX, STIX General) are now deprecated in favor of the modern OpenType math fonts (e.g. Latin Modern Math, XITS Math, Cambria Math). There are still some known bugs/limitations in Gecko, math fonts and systems so that might take some time before the migration can be fully done. However, note that we plan to remove support for the old fonts in a near future, so please upgrade your setup as soon as possible and report any issues you find. In particular: * For Web users: If you installed MathML fonts in the past, please consider cleaning up your previous installation. Read [2] for the latest documentation of the recommended math fonts. On desktop, if you use Windows >= 7 or if you have a TeX distribution installed, it's now really likely that you don't need to install additional math fonts. On mobile devices, the MathML fonts add-on [3] is still the only option for now but we have work-in-progress patches for Android and FirefoxOS. Currently, there is not any native feature to configure your preferred math fonts, but Firefox users can try the MathML-font-settings add-on [4]. * For Web authors: If you use Web font versions of deprecated math fonts (e.g. MathJax TeX or STIX General), perhaps with the help of the ::-moz-math-stretchy pseudo-element, you should update your pages. The rule is now very simple: just apply the desired font-family on the <math> elements. You might also provide WOFF fallback or additional font-family for the text. Download [5] to get WOFF fonts together with CSS stylesheets to use on your Website. * For software maintainers: Please ensure that an OpenType MATH font is available on your system or that the appropriate dependencies for Gecko-based programs are set. You might also want to remove obsolete fonts or at least drop the dependencies for Gecko-based programs. * For font designers: You are invited to create your own math fonts and test them with Gecko. Note that fontforge has menus and a Python interface to do that [6] [7]. Existing math fonts have issues with ascent/descent, please be sure that the OS/2 metrics are consistent, so that they work the same in all platforms/browsers. Related news: * The STIX fonts (STIX-Word set) have an OpenType MATH table, but there are known to have many bugs. The STIX Consortium announced version 2.0.0 for early 2015 but for now, it is recommended to use the XITS fork instead [8]. * Partial support for the OpenType MATH table is also available in WebKit Nightly and will improve the rendering of MathML operators [9]. Requests to make OpenType MATH font installed by default on iOS & Mac systems have been submitted to Apple. [1] Section 6.3.6, http://mpeg.chiariglione.org/standards/mpeg-4/open-font-format/text-isoiec-cd-14496-22-3rd-edition [2] https://developer.mozilla.org/en-US/docs/Mozilla/MathML_Project/Fonts [3] https://addons.mozilla.org/firefox/addon/mathml-fonts/ [4] https://addons.mozilla.org/en-US/firefox/addon/mathml-font-settings/ [5] https://github.com/fred-wang/MathFonts/archive/gh-pages.zip [6] http://www.fontforge.org/math.html [7] http://www.fontforge.org/python.html [8] http://www.stixfonts.org/ [9] https://bug-133569-attachments.webkit.org/attachment.cgi?id=233418 -- Frédéric Wang maths-informatique-jeux.com/blog/frederic _______________________________________________ dev-tech-mathml mailing list [hidden email] https://lists.mozilla.org/listinfo/dev-tech-mathml |
Frédéric WANG <[hidden email]> writes:
> ... The old > math fonts (e.g. MathJax TeX, STIX General) are now > deprecated in favor of the modern OpenType math fonts > (e.g. Latin Modern Math, XITS Math, Cambria Math). There are > still some known bugs/limitations in Gecko, math fonts and > systems so that might take some time before the migration > can be fully done. However, note that we plan to remove > support for the old fonts in a near future, so please > upgrade your setup as soon as possible and report any issues > you find. ... Why should it be necessary to remove support for old fonts just because new things will be supported? -- Bill _______________________________________________ dev-tech-mathml mailing list [hidden email] https://lists.mozilla.org/listinfo/dev-tech-mathml |
Le 22/07/2014 08:51, William F Hammond a écrit :
> Why should it be necessary to remove support for old fonts just > because new things will be supported? -- Bill I supposed you understood that it is not "just because new things will be supported" ;-) First the Unicode-only constructions in arbitrary fonts will still be supported, what we want to remove is the old font tables for Asana Math, "STIX General" and MathJax. Asana Math and the "STIX Word" set have an OpenType MATH table so can be used with the new code. Additionally, Latin Modern Math is a "modernized implementation of the Computer Modern fonts" (with reshaping and other stuff that are out of my area of expertise, see the papers on the GUST website for details) and so can now replace the "MathJax TeX" fonts (which is just generated via an autotracer, targeted to MathJax's needs and was a temporary solution to replace the old BaKoMa TeX support). So first, nobody should need these old fonts in the long term since you have equivalent OpenType MATH version... why do you want that?? The technical reason why we want to remove support for these old fonts is that they need special handlings which make the stretchy operator code "complicated" (to use an euphemism). Since we want to optimize it in the future, we will need to cleanup the code before refactoring it. Moving to OpenType MATH has actually been the plan for 7 years, but that finally could only be realized recently, thanks to the Ulule crowdfunding... Moreover, from the user's point of view, you will get a much more consistent way to use the various OpenType MATH fonts in WebKit/Gecko. Basically, you now have only one single Math font to deal with and only need to set the font-family on the <math> (and perhaps the companion fonts for the text). All the mathvariant selection, correction of prime size, math layout parameters, stretchy op constructions etc are stored in the font and Gecko&WebKit only need to read what has been specified by the font authors. One can even create his own math fonts with fontforge and they will be immediately supported by Gecko&WebKit without having to hardcode new data. For example, if some Mathematica people read that, they could just make an OpenType MATH version of their fonts and restore the original 15-years old support in Gecko :-) -- Frédéric Wang maths-informatique-jeux.com/blog/frederic _______________________________________________ dev-tech-mathml mailing list [hidden email] https://lists.mozilla.org/listinfo/dev-tech-mathml |
Free forum by Nabble | Edit this page |