Frames and special characters from bitmap TTF font are not visible

[atlka]

Windows 10 Pro

Platform ServicePack Version      VersionString
-------- ----------- -------      -------------
 Win32NT             10.0.19041.0 Microsoft Windows NT 10.0.19041.0

Windows Terminal
Version: 1.3.2651.0

Steps to reproduce

Use TTF font containing only embeded bitmaps, for example https://www.pg.gda.pl/~atlka/fonts/terminusa.ttf with 12pt size and 96DPI (no scaling) screen settings.
In the profile settings.json insert:

"fontFace": "Terminusa",
"fontSize": 12,

Expected behavior

All bitmap glyphs form bitmap font are displayed on the terminal like in the cmd.exe window.

Actual behavior

You can see letters and digits but no special chars and frames - they are just blanks.

[zadjii-msft]

no special chars and frames

What characters are you trying to output exactly? The exact UTF-8 encoding of the characters would help here immensely, or even just copy-pasting the character into github

[atlka]

far with Windows Terminal example:

far with Cmd.exe example:

Cmd.exe with ssh.exe and test UTF8 file:

With Windows Terminal we can see only blanks here.
If I try to display a char which glyph is not included in bitmap font Windows Terminal displays it, probably substituting it from other font - the default Cascadia font I think.

[DHowett]

oh my gosh, you're totally right!

/cc @miniksa for fun

When we get the geometries from the font for the box-drawing characters, there aren't any. This is obvious in retrospect. I totally forgot that TTF files with bitmap strikes were a thing.