metric for block coverage
James Kass via Unicode
unicode at unicode.org
Sun Feb 18 04:14:46 CST 2018
Adam Borowski wrote,
> I'm looking for a way to determine a font's coverage of available scripts.
> It's probably reasonable to do this per Unicode block. Also, it's a safe
> assumption that a font which doesn't know a codepoint can do no complex
> shaping of such a glyph, thus looking at just codepoints should be adequate
> for our purposes.
You probably already know that basic script coverage information is
stored internally in OpenType fonts in the OS/2 table.
Parsing the bits in the "ulUnicodeRange..." entries may be the
simplest way to get basic script coverage info.
OpenType fonts also include script coverage information in the
OpenType tables. A font with an OpenType table for a script would be
likely to have at least some complex script shaping abilities for that
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