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RE: Important information about the MathML fonts in Gecko 41

From: Murray Sargent <murrays@exchange.microsoft.com>
Date: Wed, 23 Sep 2015 20:58:21 +0000
To: Frédéric WANG <fred.wang@free.fr>, "Mozilla Math Developers" <dev-tech-mathml@lists.mozilla.org>, "www-math@w3.org" <www-math@w3.org>
Message-ID: <0b9643f99633476bad464ef4183d4ec0@DFM-TK5MBX15-06.exchange.corp.microsoft.com>
Frédéric noted that the STIX font doesn't support the OS/2 USE_TYPO_METRICS flag. 

For math fonts, a workaround is to check if there's a MATH table and use the typo metrics if so. Another work around is to compare the type ascent/descent to the TEXTMETRIC ascent/descent and assume a high font is involved if the latter is significantly bigger (1.5 × or more). Here's a post (http://blogs.msdn.com/b/murrays/archive/2009/12/01/high-fonts-and-math-fonts.aspx#10023606) on high fonts which explains a little more.

Received on Wednesday, 23 September 2015 20:58:57 UTC

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