#!/bin/sh
##############
# Simple script to setup the xorg.conf file as needed
# INPUTS: 
#   1: driver to use or "auto" to auto-detect the best driver
#   2: [optional: /etc/X11/xorg.conf default] path to config file to create
##############
#Get the inputs
driver=$1
file=$2
if [ -z "${file}" ] ; then
  file="/etc/X11/xorg.conf"
fi

CARDNUM=0
createDriverBlock(){
  # INPUTS: 
  # 1: device (vgapci0 by default)
  # 2: driver (automatic by default)
  # OUTPUTS:
  #  $CARDNUM (number) : only set if the input device should be used as the primary GPU
  local _device="$1"
  local _driver="$2"
  if [ -z "${_device}" ] ; then
    _device="vgapci0"
  fi
#
# Assign video driver
#
  
  if [ -z "${_driver}" ] || [ "auto" = "${_driver}" ] ; then
    local temp_driver=""
    temp_driver=`/usr/local/share/trident/scripts/detect-best-driver.sh "${_device}"`
    #check succcess of script and if true assign best-driver if false assign default VESA driver
    if [ $? -eq 0 ] ; then
	_driver=$temp_driver
    else _driver="vesa"
    fi

  fi
  local busid=`pciconf -l "${_device}" | cut -d : -f 2-4`
  local cardnum=`echo "${_device}" | tail -c 2`
  local options
  if [ "${_driver}" = "intel" ] || [ "${_driver}" = "modesetting" ] ; then
    #Disable GPU accelleration for intel/modesetting - causes graphical artifacting (TrueOS 18.06)
    options="Option   \"AccelMethod\"   \"none\""
    #Also save this card number as the primary if on a laptop (NVIDIA optimus?)
    devinfo | grep -q acpi_acad0
    if [ $? -eq 0 ] ; then
      #Got a laptop - go ahead and save this intel GPU as the primary
      CARDNUM=${cardnum}
    fi
  fi
#Add the device section to the 
  echo "Section \"Device\"
  Identifier      \"Card${cardnum}\"
  Driver          \"${_driver}\"
  BusID           \"${busid}\"
  ${options}
EndSection
" >> ${file}
}

#Now copy over the xorg.conf template
template="/usr/local/share/trident/xorg-templates/xorg.conf"
cp -f "${template}" "${file}"

#If auto is selected, determine the best driver
# Note: the CARDNUM variable will return the number of the GPU to use (typically 0)
if [ "${driver}" = "auto" ] || [ -z "${driver}" ] ; then
  for dev in `pciconf -l | grep vgapci | cut -d @ -f 1`
  do
    createDriverBlock "${dev}"
  done
else
  createDriverBlock "vgapci0" "${driver}"
fi
sed -i '' "s|%%CARDNUM%%|${CARDNUM}|g" "${file}"