Where is drracket-core-lib/drracket/private/font.rkt getting the smoothing settings from?

Hi, on Windows I never updated DrRacket past 8.5 because the font smoothing values changed for the worse.

On Linux I have 8.17 flatpak installed and I do know my way around a fontconfig file and environment variables but I need to understand how DrRacket knows what and where to set for None, Some and All so I can see if I can make suggestions on making it better.

The file in the path in the subject line doesn't provide values, just calls something else. I can tell it is not using the values I have defined in the system.

From pixel-peeping I can tell that "All" is using sub-pixel with the colour fringes, "Some" is using greyscale. But settings for hinting, lcdfilter, etc. seem like they need to be adjusted for all 3 categories. Freetype interpreter version # as well makes a difference.

Is there a place where these values are defined? I know it is doing its own thing because it does on Windows.

Read drracket-core-lib/drracket/private/font.rkt and follow the call that supplies the smoothing settings rather than treating that file as the source. Trace where None, Some, and All are defined and how the Windows and Linux values differ; done means identifying those sources clearly enough to evaluate possible improvements.