dpi detection

hi guys! since some of us use live usb, why not develop a script for kali to execute during start up so as to calculate the dpi and set the correct configuration for the scaling factor for gnome(may be even for grub)? This idea came across my mind last night when I was booting kali on a macbook retina, I have yet started working on it. Anyone had attempted it before? Most of the applications such as gedit and file manager looks greet, but sometimes the minimizing button and libreoffice still looks very small.