Axle has been using a low-resolution 8×8 bitmap font for font rendering, but the author wants to fix it. They explain that font rendering involves telling the computer which pixels should be on or off, darkened, or let the background shine through. They then introduce a minimalist text renderer that uses a simple data format to describe each character as an 8×8 grid of pixels. However, they acknowledge that this approach is limited and lacks the ability to describe curves and use different fonts. They then discuss the TrueType font format and the process of parsing and rendering TrueType fonts, highlighting the challenges and optimizations involved.
https://axleos.com/writing-a-truetype-font-renderer/