power-overlay

because reading Intel RAPL requires root (and also is NOT safe to make it globally readable)

• esc/q to exit
• +/- to change font size
• up/down to change opacity
• drag to move

compile

gcc main.c -o power-overlay `sdl2-config --cflags --libs` -lSDL2_gfx -lm

if you want to add a desktop file

power-overlay.sh

#!/bin/bash
pkexec env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY /home/user/.local/bin/power-overlay

power-overlay.desktop

[Desktop Entry]
Name=power overlay
Exec=power-overlay
Type=Application