font rending issue, it seems Anti-aliasing is not applied to red color

tradingpost1 · 2025-01-23 07:30:09

It's very strange that it seems only red color texts have this issue while all other colored texts rendered fine?

I'm using bspwm+picom (via startx), but tried mate DE and it has the same issue.

tradingpost1 · 2025-01-23 07:31:30

Oh, actually the screen snapshot result is fine, doesn't show the issue.
But the actual display result has this issue, which I might have to take photos to show this, wondering if this could be monitor issue or linux's issue

seth · 2025-01-23 11:57:43

Can you make and link a photo that shows the effect?
Speaking of which, please replace the oversized (and now pointless) screenshots w/ symlinks.

Is this a recent regression?
https://bbs.archlinux.org/viewtopic.php?id=302807

tradingpost1 · 2025-01-23 14:33:10

here's the photos , with the red colored one, it is visually ugly without Anti-aliasing, for other colors, I feel they are a lot more smooth.
However both are far from the good looking in the screenshots in the top floor.
I'm not sure if here I have font rendering issue, or it's my eye is sensitive with red color, or the monitor has issue. The monitor is
Dell 4K UHD P2715Q, which is a good one, display via HDMI signal.

seth · 2025-01-23 16:08:20

Your eyes are ok and therefore I also don't think it's the CCD - there's clearly subpixel rendering and it's clearly screwed wrt. the red pixels.

What's the terminal emulator? Do you get the same with others (xterm)?
Also

seth wrote:

Is this a recent regression?
https://bbs.archlinux.org/viewtopic.php?id=302807

tradingpost1 · 2025-01-23 16:18:42

The term in the photo is alacritty, but it's same issue in mate-terminal, xterm, kitty. And even in polybar, eww(the calendar is eww).
So it is system wide.
It appears from some stage. Maybe it's due to the enviroment configrartion, I'll try to create a new user to test

Last edited by tradingpost1 (2025-01-23 16:19:39)

seth · 2025-01-23 16:28:11

alacritty isn't affected by the recent change that killed subpixel hinting in gtk and qt6, maybe your subpixel hinting config is off?
https://wiki.archlinux.org/title/Font_c … xel_layout

Arch Linux

#1 2025-01-23 07:30:09

font rending issue, it seems Anti-aliasing is not applied to red color

#2 2025-01-23 07:31:30

Re: font rending issue, it seems Anti-aliasing is not applied to red color

#3 2025-01-23 11:57:43

Re: font rending issue, it seems Anti-aliasing is not applied to red color

#4 2025-01-23 14:33:10

Re: font rending issue, it seems Anti-aliasing is not applied to red color

#5 2025-01-23 16:08:20

Re: font rending issue, it seems Anti-aliasing is not applied to red color

#6 2025-01-23 16:18:42

Re: font rending issue, it seems Anti-aliasing is not applied to red color

#7 2025-01-23 16:28:11

Re: font rending issue, it seems Anti-aliasing is not applied to red color

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