how to evaluate the "emoji support level" in given font?

Doug Ewell doug at
Sat Sep 10 17:25:29 CDT 2016

suzuki toshiya wrote:

> Is it possible to design a subset of emoji to serve common use of
> emoji? Or, if such attempt (evaluate the support level of emoji by
> checking some codepoints) is wrong, is there any good method to
> evaluate the support level of emoji in given font?

This could be a more complex question for emoji than for writing 
systems. Users might have different expectations of what constitutes 
"support" for emoji as compared to, say, Latin or Kanji. They might 
expect to be able to select text or emoji rendering via U+FE0E and 
U+FE0F, or might expect support for ZWNJ sequences. fontconfig may or 
may not be wired to take this into account.

On the other hand, as far as full or less-than-full coverage is 
concerned, does fontconfig currently insist on 100% coverage of all 
characters in a script? Nearly all fonts offer Basic Latin (ASCII) 
support, while relatively few have glyphs for the Latin Extended-E 
block. Is the latter required in order to claim "Latin script support," 
and if not, would similar criteria apply when determining "emoji 

Not trying to be critical, just trying to understand the expectations.

Doug Ewell | Thornton, CO, US | 

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