Hi,

Is there anyway I can tell whether a particular uft8 code-point is
actually implemented in my terminal's current font?

For example, 0xe2 0x96 0x89 "▉" "Left Seven Eighths Block" is often
displayed as the i-don't-know-what-this-is glyph.

Thanks.

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Richard Harnden <richard.nospam@gmail.invalid> wrote:

Hi,

Is there anyway I can tell whether a particular uft8 code-point is
actually implemented in my terminal's current font?

The only way I know is to write a small program to
print it. That is what I did for various UTF-8
characters I like to use.

For example, 0xe2 0x96 0x89 "?" "Left Seven Eighths Block" is often
displayed as the i-don't-know-what-this-is glyph.

FWIW, 7/8 does not print for me on Linux and *BSD, but
on all systems Emacs will print it plus many more that
does not show up on xterm and other terms.

Thanks.

--
csh(1) - "An elegant shell, for a more... civilized age."
- Paraphrasing Star Wars

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On Fri, 20 Dec 2024 13:55:18 +0000, Richard Harnden wrote:

Is there anyway I can tell whether a particular uft8 code-point is
actually implemented in my terminal's current font?

You need some utility to dump out the font’s character-mapping table.

E.g. I wrote a Python script called “code_coverage” here <https://gitlab.com/ldo/python_freetype_examples/>, which will list
the code blocks defined for any specified font.

In this repo <https://gitlab.com/ldo/python_fontconfig_examples/>,
there is a tool called “coverage_list”. This will scan all the fonts
that fontconfig on your system knows about, to find those that cover a
given code block.

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