This is scaled bitmap, not vector graphics. Can you guess how big the source bitmap is?
16x16 pixels RGB565 bitmap
Each pixel of the source bitmap contains information about the distance to the closest edge of the letter or symbol. The technique is called signed distance fields. It is used e.g. in 3D games for rendering sharp decals without the need for high resolution images. I don’t know if this has any use on Pokitto, just thought it’d be interesting to test.
I used the more advanced RGB color method. You could also use a grayscale source bitmap if you want to save memory and don’t need that sharp corners.
Source code: SDFFont.zip (8.3 KB)