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Aliased unicode box drawing characters #17727

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opened 2026-01-31 05:51:32 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 05:51:32 +00:00
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Originally created by @he3als on GitHub (Jun 15, 2022).

Windows Terminal version

1.13.11432.0

Windows build number

10.0.22000.318

Other Software

No response

Steps to reproduce

Test out some of the unicode box drawing characters like U+256D (╭), U+256E (╮), U+256F (╯) in Windows Terminal and you will see that they are aliased. I am using the same font in both Console Host and Windows Terminal. As you zoom in, it seemingly randomly gets anti-aliased and looks normal, but most of the time it doesn't:

https://user-images.githubusercontent.com/65787561/173909326-fdeffd3a-1f02-4c04-a401-3ab62d53dae0.mp4

<html>
  0 1 2 3 4 5 6 7 8 9 A B C D E F
U+250x ─ ━ │ ┃ ┄ ┅ ┆ ┇ ┈ ┉ ┊ ┋ ┌ ┍ ┎ ┏
U+251x ┐ ┑ ┒ ┓ └ ┕ ┖ ┗ ┘ ┙ ┚ ┛ ├ ┝ ┞ ┟
U+252x ┠ ┡ ┢ ┣ ┤ ┥ ┦ ┧ ┨ ┩ ┪ ┫ ┬ ┭ ┮ ┯
U+253x ┰ ┱ ┲ ┳ ┴ ┵ ┶ ┷ ┸ ┹ ┺ ┻ ┼ ┽ ┾ ┿
U+254x ╀ ╁ ╂ ╃ ╄ ╅ ╆ ╇ ╈ ╉ ╊ ╋ ╌ ╍ ╎ ╏
U+255x ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟
U+256x ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ ╭ ╮ ╯
U+257x ╰ ╱ ╲ ╳ ╴ ╵ ╶ ╷ ╸ ╹ ╺ ╻ ╼ ╽ ╾ ╿
</html>

Expected Behavior

I expected it to look like regular CMD/Console Host that looks pretty much perfect no matter the zoom.

https://user-images.githubusercontent.com/65787561/173909556-b31458ba-310c-47b1-99a4-8707561713b4.mp4

Actual Behavior

It looks aliased at most zoom levels, including the default.

image

Originally created by @he3als on GitHub (Jun 15, 2022). ### Windows Terminal version 1.13.11432.0 ### Windows build number 10.0.22000.318 ### Other Software _No response_ ### Steps to reproduce Test out some of the [unicode box drawing characters](https://en.wikipedia.org/wiki/Box-drawing_character#Box_Drawing) like U+256D (╭), U+256E (╮), U+256F (╯) in Windows Terminal and you will see that they are aliased. I am using the same font in both Console Host and Windows Terminal. As you zoom in, it seemingly randomly gets anti-aliased and looks normal, but most of the time it doesn't: https://user-images.githubusercontent.com/65787561/173909326-fdeffd3a-1f02-4c04-a401-3ab62d53dae0.mp4 <html><body> <!--StartFragment-->   | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- U+250x | ─ | ━ | │ | ┃ | ┄ | ┅ | ┆ | ┇ | ┈ | ┉ | ┊ | ┋ | ┌ | ┍ | ┎ | ┏ U+251x | ┐ | ┑ | ┒ | ┓ | └ | ┕ | ┖ | ┗ | ┘ | ┙ | ┚ | ┛ | ├ | ┝ | ┞ | ┟ U+252x | ┠ | ┡ | ┢ | ┣ | ┤ | ┥ | ┦ | ┧ | ┨ | ┩ | ┪ | ┫ | ┬ | ┭ | ┮ | ┯ U+253x | ┰ | ┱ | ┲ | ┳ | ┴ | ┵ | ┶ | ┷ | ┸ | ┹ | ┺ | ┻ | ┼ | ┽ | ┾ | ┿ U+254x | ╀ | ╁ | ╂ | ╃ | ╄ | ╅ | ╆ | ╇ | ╈ | ╉ | ╊ | ╋ | ╌ | ╍ | ╎ | ╏ U+255x | ═ | ║ | ╒ | ╓ | ╔ | ╕ | ╖ | ╗ | ╘ | ╙ | ╚ | ╛ | ╜ | ╝ | ╞ | ╟ U+256x | ╠ | ╡ | ╢ | ╣ | ╤ | ╥ | ╦ | ╧ | ╨ | ╩ | ╪ | ╫ | ╬ | ╭ | ╮ | ╯ U+257x | ╰ | ╱ | ╲ | ╳ | ╴ | ╵ | ╶ | ╷ | ╸ | ╹ | ╺ | ╻ | ╼ | ╽ | ╾ | ╿ <!--EndFragment--> </body> </html> ### Expected Behavior I expected it to look like regular CMD/Console Host that looks pretty much perfect no matter the zoom. https://user-images.githubusercontent.com/65787561/173909556-b31458ba-310c-47b1-99a4-8707561713b4.mp4 ### Actual Behavior It looks aliased at most zoom levels, including the default. ![image](https://user-images.githubusercontent.com/65787561/173909660-9caf3627-1dc5-44dd-a8c6-6e2cd20a3032.png)
claunia added the Needs-TriageIssue-BugNeeds-Tag-Fix labels 2026-01-31 05:51:32 +00:00
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Reference: starred/terminal#17727
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