#! /bin/bash
#
# By Carlo Wood, 24 Oct 1998
#
# Revised for RedHat 9 with kernel 2.6 at 13 Aug 2003
# Only quake 2.30 is now supported.
#
# READ THE HOWTO at: http://www.xs4all.nl/~carlo17/3dfx/
#

if [ -f /usr/sbin/gpm ]; then
  GPM=/usr/sbin/gpm
else
  GPM=`which gpm`
fi

if [ -f /etc/redhat-release ]; then
  . /etc/sysconfig/mouse
fi

# Mount cd in case we want audio
#sudo /bin/mount -r -t iso9660 /dev/cdrom /cdrom 2> /dev/null

# This MUST be the *real* path name, not a symlink.
# If it was a symlink, then it won't work until you
# remove /etc/ld.so.cache and rerun ldconfig.
#
# Example: If this reads "cd /usr/local/games/quake2" and
# /usr/local/games is a symbolic link to /opt/games, then it won't
# work, not even after changing this to cd /opt/games/quake2,
# until you remove /etc/ld.so.cache and rerun ldconfig.
#
# This MUST be the same as /usr/local/games/quake2,
# although it is allowed to make that a symbolic link.
# (ie let /usr/local/games point to /opt/games).
#
cd /usr/local/games/quake2

# Detect if we have an NVidia graphics card
if [ ! -e /proc/driver/nvidia/cards/0 ]; then
  HAVE_NVIDIA=no
else
  HAVE_NVIDIA=yes
  # Do a few sanity checks
  if [ ! -f /usr/X11R6/lib/modules/drivers/nvidia_drv.o ]; then
    echo "nVidia graphics card detected, but no nvidia driver!"
    echo "Please go and check http://www.nvidia.com/ for the linux drivers!"
    exit
  fi
  if [ -z "$DISPLAY" ]; then
    echo "The nVidia driver does not support running from the console."
    echo "Start q2 from the X windowing system."
    exit
  fi
  if [ -f /usr/X11R6/lib/modules/extensions/libglx.a ]; then
    echo "Old libglx still present!  Please remove/rename it!"
    exit
  fi
  if [ -f /usr/X11R6/lib/modules/extensions/libGLcore.a ]; then
    echo "Dangerous (old) libGLcore module still present!  Please remove/rename it!"
    echo "You might also choose to remove the 'Load \"GLcore\"' from the Module"
    echo "section of your /etc/X11/XF86Config-4 file (I'd say, comment it out anyway)."
    exit
  fi
  OTHERLIBSPATTERN=`ls /usr/X11R6/lib/libGL.so* /usr/X11R6/lib/libGLcore.so* 2>/dev/null`
  if [ ! -z "$OTHERLIBSPATTERN" ]; then
    echo "Please rid of colliding libraries in /usr/X11R6/lib,"
    echo "(libGL.so* and libGLcore.so*)."
    exit
  fi
  if [ ! -e /usr/X11R6/lib/modules/extensions/libglx.so ]; then
    echo "Missing symlink to /usr/X11R6/lib/modules/extensions/libglx.so.X.Y.Z"
    exit
  fi
  if [ ! -f /usr/lib/libGL.so ]; then
    echo "Missing symlink to /usr/lib/libGL.so.X.Y.Z"
    exit
  fi
  LIBGLXVERSION=`ls /usr/X11R6/lib/modules/extensions/libglx.so.*.*.* | sed -e 's/.*libglx\.so\.//'`
  LIBGLVERSION=`ls /usr/lib/libGL.so.*.*.* | sed -e 's/.*libGL\.so\.//'`
  echo "LIBGLXVERSION = $LIBGLXVERSION"
  echo "LIBGLVERSION = $LIBGLVERSION"
  if [ "$LIBGLXVERSION" != "$LIBGLVERSION" ]; then
    echo "Wrong version of /usr/lib/libGL.so.X.Y.Z present!  Please remove/rename it!"
    echo "Make sure that the symlink /usr/lib/libGL.so to the library provided by nVidia."
    exit
  fi
  NVDRIVERPATTERN=`cat /proc/modules | grep '^nvidia'`
  if [ -z "$NVDRIVERPATTERN" ]; then
    echo "No nVidia kernel module loaded!"
    echo "Did you add a line \"alias char-major-195 nvidia\" to /etc/modprobe.conf?"
    echo "Please check http://www.nvidia.com/ for the linux kernel module."
  fi
fi

if [ -z "$DISPLAY" ]; then
  # Release mouse, the gl driver won't get it otherwise.
  sudo $GPM -k
  echo "Running from console";
else
  echo "X windowing system detected";
  if [ "$HAVE_NVIDIA" = no ]; then
    export MESA_GLX_FX=fullscreen
  fi
fi

# Multiplier
GAMMA_MULTIPLIER=3
if [ -z "$DISPLAY" ]; then
  # Increase gamma for Voodoo2
  export SSTV2_GAMMA=$GAMMA_MULTIPLIER
  export SSTV2_RGAMMA=$GAMMA_MULTIPLIER
  export SSTV2_GGAMMA=$GAMMA_MULTIPLIER
  export SSTV2_BGAMMA=$GAMMA_MULTIPLIER
else
  # Increase gamma for X
  # Get the current gamma values
  XGAMMA_VALUES=`xgamma 2>&1`
  RGAMMA=`echo "$XGAMMA_VALUES" | sed -e 's/.*Red *\([0-9]*\.[0-9]*\).*/\1/'`
  GGAMMA=`echo "$XGAMMA_VALUES" | sed -e 's/.*Green *\([0-9]*\.[0-9]*\).*/\1/'`
  BGAMMA=`echo "$XGAMMA_VALUES" | sed -e 's/.*Blue *\([0-9]*\.[0-9]*\).*/\1/'`
  # Calculate new values
  NRGAMMA=`echo $RGAMMA $GAMMA_MULTIPLIER | awk '{ printf("%.3f\n", $1 * $2); }'`
  NGGAMMA=`echo $GGAMMA $GAMMA_MULTIPLIER | awk '{ printf("%.3f\n", $1 * $2); }'`
  NBGAMMA=`echo $BGAMMA $GAMMA_MULTIPLIER | awk '{ printf("%.3f\n", $1 * $2); }'`
  # Set it
  echo "Changing gamma settings:"
  xgamma -rgamma $NRGAMMA -ggamma $NGGAMMA -bgamma $NBGAMMA
fi

# Quake 3.20beta
if [ -z "$DISPLAY" ]; then
  # Started from console
  # glibc version
  LD_PRELOAD="/usr/lib/libglide2x.so" \
  ./quake2 +set vid_ref gl +set gl_driver lib3dfxgl.so $*
else
  # Started from X windowing system
  if [ "$HAVE_NVIDIA" = no ]; then
    LD_PRELOAD="/usr/lib/libglide2x.so" \
    ./quake2 +set vid_ref glx +set gl_driver lib3dfxgl.so +set _windowed_mouse 1 $*
  else
    # Using nVidia driver!
    echo "nVidia driver"
    ./quake2 +set vid_ref glx +set gl_driver libGL.so +set _windowed_mouse 1 $*
  fi
fi

export LD_LIBRARY_PATH=

# Turn off 3dfx card
if [ "$HAVE_NVIDIA" = no ]; then
  sudo /usr/local/glide/bin/pass
fi
if [ -z "$DISPLAY" ]; then
  # Try to recover keyboard in case of a crash
  sudo /usr/bin/kbd_mode -a
  # Reset VT
  sleep 8
  reset
  # Restart mouse
  if [ -z "$XMOUSETYPE" ]; then
    # Fix this if you haven't RedHat
    XMOUSETYPE="PS/2"
  fi
  sudo $GPM -t $XMOUSETYPE
  # Change back to X windowing system
  #chvt 7
else
  # Restore gamma settings
  xgamma -rgamma $RGAMMA -ggamma $GGAMMA -bgamma $BGAMMA
fi