#!/bin/sh

# SPDX-FileCopyrightText: 2025 Benjamin Grande M. S. <ben.grande.b@gmail.com>
#
# SPDX-License-Identifier: AGPL-3.0-or-later
#
# https://www.qubes-os.org/doc/gui-configuration/#video-ram-adjustment-for-high-resolution-displays

set -eu

if ! command -v xrandr >/dev/null; then
  print '%s\n' "missing program: xrandr" >&2
  exit 1
fi

gui_mem="$(xrandr --listactivemonitors |
  awk -F'[ /x]' '/^\s+[0-9]+/{if($4>max) max=$4; sum+=$6}
  END {print max*sum*4/1024}')"

if test "${gui_mem}" = "0"; then
  exit
fi

qvm-features dom0 gui-videoram-min "${gui_mem}"
qvm-features dom0 gui-videoram-overhead 0