#!/bin/sh
# A stupid script to switch GL libs on chakra/archlinux
USAGE=0
F_FGLRX="/usr/lib/fglrx/fglrx-libGL.so.1.2"
F_MESA="/usr/lib/libGL.so.1.2.mesa"
F_TARGETS="/usr/lib/libGL.so.1.2"
F32_FGLRX="/usr/lib32/fglrx/fglrx-libGL.so.1.2"
F32_MESA="/usr/lib32/libGL.so.1.2.mesa"
F32_TARGETS="/usr/lib32/libGL.so.1.2"

if [ -z $1 ]; then
  USAGE=1
fi
if [ $USAGE -eq 1 ]; then
  echo "Usage: $0 amd|intel|query"
  exit 0
fi

function fix_links {
    ln -sf ${F_MESA} ${F_TARGETS}
    ln -sf ${F_TARGETS} /usr/lib/libGL.so.1
    ln -sf ${F_TARGETS} /usr/lib/libGL.so

    if [ -e $F32_FGLRX ]; then
      ln -sf ${F32_MESA} ${F32_TARGETS}
      ln -sf ${F32_TARGETS} /usr/lib32/libGL.so.1
      ln -sf ${F32_TARGETS} /usr/lib32/libGL.so
    fi
}
function switch_ati {
    ln -sf ${F_FGLRX} ${F_TARGETS}
    if [ -e $F32_FGLRX ]; then
      ln -sf ${F_FGLRX} ${F_TARGETS}
    fi
}

function switch_intel {
    ln -sf ${F_MESA} ${F_TARGETS}
    if [ -e $F32_FGLRX ]; then
      ln -sf ${F_MESA} ${F_TARGETS}
    fi
}
function print_current {
  CURRENT_GL=`ls -l ${F_TARGETS}|awk '{print $11}'`
#  echo $CURRENT_GL
  if [ -z $CURRENT_GL ]; then
    echo unknown
    exit 1
  fi
  if [ "$CURRENT_GL" = ${F_FGLRX} ]; then
    echo "amd"
  fi
  if [ "$CURRENT_GL" = ${F_MESA} ]; then
    echo "intel"
  fi
}

if [ "$1" = "amd" ]; then
  fix_links
  switch_ati
else
  if [ "$1" = "intel" ];then
    fix_links
    switch_intel
  else
    if [ "$1" = "query" ]; then
      print_current
    fi
  fi
fi