Font subpixel antialiasing results in artifacts

[mihe]

Tested versions

• Reproducible in 4.4.dev [694d3c2]
• Reproducible in 4.4.dev [2c136e6]
• Not reproducible in 4.4.dev [14a7e0a]

System information

Godot v4.4.dev (2c136e6) - Windows 11 (10.0.22631) - Vulkan (Mobile) - dedicated NVIDIA GeForce RTX 4070 Laptop GPU (NVIDIA; 32.0.15.6109) - AMD Ryzen 9 7940HS w/ Radeon 780M Graphics (16 Threads)

Issue description

As best I can tell (using git bisect) this looks to be a regression caused by #92797.

When using the "LCD Subpixel" value of the editor setting interface/editor/font_antialiasing, on Windows 11 in my case, I end up getting rendering artifacts around a lot of the text in the editor, which looks like this:

This is what it looks like when using the default grayscale antialiasing:

Here's what subpixel antialiasing looks like up close:

Here's what the grayscale equivalent looks like up close:

Steps to reproduce

• Open the editor.
• Set the interface/editor/font_antialiasing editor setting to "LCD Subpixel".
• Wait for the editor to update everything.
• Note the artifacts.

Minimal reproduction project (MRP)

N/A

[stuartcarnie]

Can confirm I'm seeing oddities, so I'll take a look. Thanks for the report!

[stuartcarnie]

1. Able to reproduce issue
2. Resolved issue

Found the issue, and is fixed in #97217