some ligature rendered abnormally

[zhang-stephen]

Windows Terminal version

1.13.10395.0(preview)

Windows build number

10.0.19042.1466

Other Software

Something over SSH to CentOS 7.9:

• neovim 0.6.1
• tmux 3.1a

Fonts:
FiraCode NF(with windows compatible)

Steps to reproduce

1. install FiraCode NF follow above link

2. terminal configuration:

   {
       "protiles": {
            "lists": [
               {
                   "adjustIndistinguishableColors": true,
                   "antialiasingMode": "cleartype",
                   "backgroundImage": null,
                   "closeOnExit": "always",
                   "colorScheme": "Campbell",
                   "commandline": "ssh <username>@<hostname>",
                   "name": "<remoteHost>",
                   "cursorShape": "underscore",
                   "experimental.useAtlasEngine": true,
                   "font": {
                       "face": "FiraCode NF",
                       "size": 11
                   },
                   "guid": "{6c5275a4-b63e-46ce-a2eb-e3ea1f73666f}",
                   "hidden": false,
                   "historySize": 100001,
                   "opacity": 85,
                   "padding": "8",
                   "useAcrylic": true
               }
           ]
       }
   }

3. print this text on terminal(the logo of neovim in following screenshots):
   test.txt

4. it could be reproduced under powershell 7 on Windows

Expected Behavior

the true rendering in other terminal:

Actual Behavior

you can find ligatures not effective in screenshots:

screenshot of Powershell 7:

[Finii]

I believe this is no bug of Windows Terminal but is related to the used font. The linked font is a rather old variant and there have been several fixes in the glyph sizes in the meanwhile. Will check with a HEAD release of that font.

[Finii]

With the HEAD font I can not reproduce the issue (no breaks in horizontal box lines).
https://github.com/ryanoasis/nerd-fonts/blob/master/patched-fonts/FiraCode/Regular/complete/Fira%20Code%20Regular%20Nerd%20Font%20Complete%20Windows%20Compatible.ttf

But then I have not the Powershell window?
Maybe you can give us the NeoVim Ascii Art for a test.

[zadjii-msft]

This might just be the same thing as #12566. Switch to grayscale antialiasing.

[zadjii-msft]

Okay, sorry for the brief reply earlier. Looking more carefully, I'm gonna say this is definitely a /dup of #8993. This isn't an issue with ligatures, but rather the way cleartype antialiasing interacts with box drawing characters.

[ghost]

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!

[zhang-stephen]

With the HEAD font I can not reproduce the issue (no breaks in horizontal box lines). https://github.com/ryanoasis/nerd-fonts/blob/master/patched-fonts/FiraCode/Regular/complete/Fira%20Code%20Regular%20Nerd%20Font%20Complete%20Windows%20Compatible.ttf

But then I have not the Powershell window? Maybe you can give us the NeoVim Ascii Art for a test.

I uploaded the test.txt, includes NeoVim Ascii Art, you can find it in the first issue message. And I will try the HEAD font. thanks.

On the other hand, did you test this issue on stable release? I noticed the page settings is different to preview release.

[zhang-stephen]

Okay, sorry for the brief reply earlier. Looking more carefully, I'm gonna say this is definitely a /dup of #8993. This isn't an issue with ligatures, but rather the way cleartype antialiasing interacts with box drawing characters.

I cannot find effective solution in #8993, any suggestions? I came back to the stable release in MS store right now.

[zadjii-msft]

Set "antialiasingMode": "grayscale", in your profile. See #8993 (comment)

[zhang-stephen]

Set "antialiasingMode": "grayscale", in your profile. See #8993 (comment)

thanks for your reply but it is not effective.

[zadjii-msft]

Could you share your settings.json file?

[zhang-stephen]

settings.zip
Github doesn't support to upload .json file.

I think I found the root cause: "experimental.useAtlasEngine": true, . the rendering looks normal after this field disabled and re-opening the terminal, even "antialiasingMode" filled as cleartype, but I don't remember I have turned on it.

Thank you again.