bug#57693: 29.0.50; Is there a more reliable version of `char-displayable-p'?

[Ihor Radchenko]

Eli Zaretskii <eliz@gnu.org> writes:

>> > The display engine only knows it retroactively, when it tried and
>> > failed to display a character.
>> 
>> The situation is similar to `string-pixel-width'.
>
> ??? You rejected such methods in an earlier message, because it
> required a temporary buffer, which you said will not reproduce the
> exact environment of the buffer where you want to show the character.
> Or what am I missing?

Sorry for not being clear.

I was referring to the approach when we try to insert a text into buffer
(temporary or not) and then check the result in some way.

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Ihor Radchenko,
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