The Graphics implementation is native C-Code. It should be in in this area: https://github.com/espruino/Espruino/blob/master/libs/graphics/jswrap_graphics.c
@AntiCat started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
The Graphics implementation is native C-Code. It should be in in this area: https://github.com/espruino/Espruino/blob/master/libs/graphics/jswrap_graphics.c