On Sun, 18 Feb 2018 13:05:29 +0100
Adam Borowski via Unicode <unicode_at_unicode.org> wrote:
> On Sun, Feb 18, 2018 at 02:14:46AM -0800, James Kass wrote:
> > You probably already know that basic script coverage information is
> > stored internally in OpenType fonts in the OS/2 table.
> >
> > https://docs.microsoft.com/en-us/typography/opentype/spec/os2
>
> It's only a single bit without a meaning beyond "range is considered
> functional". No "basic coverage" vs "good coverage" vs "full
> coverage".
It's worse than that when a script uses characters primarily
associated with another script. For example, to have any confidence
that my Tai Tham font will be used for U+0E4A THAI CHARACTER MAI
TRI or U+0E4B THAI CHARACTER MAI CHATTAWA placed on U+1A4B TAI THAM
LETTER A, I have to set the Thai bit, even though I only have four Thai
characters in my font. (The other two are punctuation.)
Richard.
Received on Sun Feb 18 2018 - 13:11:06 CST
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