On 9/25/2025 23:03, Thomas Wolff via Cygwin wrote:
Am 26.09.2025 um 07:33 schrieb Jim Garrison via Cygwin:
This is a very minor and totally cosmetic issue, but it's been around
"forever" so I'm curious if I'm the only one seeing it.
When displaying colored text in mintty configured with a block cursor
and dark background, as the cursor moves across text (in vi, say) it
will change the color of the rightmost pixel column of certain
characters (not all). This happens when moving the cursor left-to-
right, and the discolored bits disappear (or go back to their original
color) when moving right-to-left.
I'm pretty sure this has to do with anti-aliasing, and may not even be
mintty's problem, but I've never seen it anywhere else.
I put a couple of small demonstration screenshots on Google Drive:
Actual size: https://drive.google.com/file/
d/1gF86FJMJqQJDaFHTVZXEZrMNIyRtTCSL/view?usp=sharing
Enlarged view: https://drive.google.com/file/
d/15zWPNZQvryILvqRhaiFE3O35L057R8jQ/view?usp=sharing
Is this effect affected by the Font smooting setting?
Good catch! Changing Font-Smoothing to Partial or None greatly reduces
the problem but it doesn't go away completely. After further
experimentation I find that it also depends on the font.
I tried a few:
Affected: Lucida Console, Courier, Cascadia Code
Not affected: Lucida Sans Typewriter, Consolas, Brougham
The "Not affected" fonts don't display the problem with any
font-smoothing setting, while for the affected fonts the problem is
still present but affects fewer characters with font-smoothing None or
Partial.
[Also, I got the directions backwards in my original message. The issue
occurs when moving the cursor R-to-L, and "corrects" when moving L-to-R.]
--
Jim Garrison
[email protected]
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