Splash Logo

Convert the file to BPM truecolor with

convert "$1" -type truecolor "$1.bmp"

Add the logo file to the FILES section of the /etc/mkinitcpio.conf. And the vfat module.

MODULES="usbhid xhci_hcd i915 vfat"
FILES="/home/david/Pictures/logo.bmp"

Then edit your preset(s) under /etc/mkinitcpio.d/<preset>.preset. And add the following

fallback_options="-S autodetect --splash /home/david/Pictures/logo.bmp"
default_options="--splash /home/david/Pictures/logo.bmp"