Current File : //usr/share/texlive/texmf-dist/metafont/misc/mode2dpi.mf

% Usage: mf '\mode=what_ever_mode; \input mode2dpi'

let myexit = primitive_end_;
mode_setup;
string dpi;
dpi := decimal round pixels_per_inch;
message "DPI = " & dpi;
fontmaking := 0;
myexit;