minios/ramfs/etc/init/frecon.conf

# Copyright 2021 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description     "Start Frecon"
author          "chromeos-core-services@google.com"

start on started dbus
expect fork
respawn

pre-start script
  # b/158282097: force reprobe since type-c to DP connectors
  # seems not detected at boot
  for f in /sys/class/drm/*/status; do
    echo detect > "${f}"
  done
  sleep 1s

  resolution="$(/bin/frecon-lite --print-resolution || echo 1000 1000)"
  x_res="${resolution% *}"
  y_res="${resolution#* }"
  if [ "${x_res}" -le "${y_res}" ]; then
    # for tablet mode, add 20px margin for left and right edge.
    CANVAS_SIZE="$(( x_res - 40 ))"
  else
    CANVAS_SIZE="${y_res}"
  fi

  if [ "${CANVAS_SIZE}" -ge 1920 ]; then
    FRECON_SCALING_FACTOR=2
    CANVAS_SIZE="$(( CANVAS_SIZE / 2 ))"
  else
    FRECON_SCALING_FACTOR=1
  fi

  # Save Frecon constants to use in MiniOs.
  mkdir -p /etc/frecon
  echo "${CANVAS_SIZE}" > /etc/frecon/size
  echo "${FRECON_SCALING_FACTOR}" > /etc/frecon/scale
end script

exec frecon-lite --enable-vt1 --daemon --no-login --enable-gfx --enable-vts \
  --scale="${FRECON_SCALING_FACTOR}" --clear="0x202124" \
  --pre-create-vts /dev/null

post-start script
  # Give frecon a second to start up before turning off keyboard input
  # processing and starting MiniOs UI.
  # TODO(b/181366924): MiniOs: detect if Frecon is up before showing screens.
  sleep 1s
  printf "\033]input:off\a" > /run/frecon/vt0
end script