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#! /bin/bash
# This script needs bash for the arrays
# This script adds the common resolutions to the Xserver if and only if there
# is a beamer connected. Additionally, if the preferred resolution is known,
# (i.e. the Xserver received a proper EDID) the latter will be applied.
################################################################################
# Add or remove additional modes here.
declare -a MODES
MODES=("${MODES[@]}" "1280x800 83.50 1280 1352 1480 1680 800 803 809 831 -hsync +vsync")
MODES=("${MODES[@]}" "1440x1050 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync")
MODES=("${MODES[@]}" "1680x1200 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync")
MODES=("${MODES[@]}" "1920x1200 193.25 1920 2056 2256 2592 1200 1203 1209 1245 -hsync +vsync")
MODES=("${MODES[@]}" "1280x720 74.50 1280 1344 1472 1664 720 723 728 748 -hsync +vsync")
MODES=("${MODES[@]}" "1368x768 85.25 1368 1440 1576 1784 768 771 781 798 -hsync +vsync")
MODES=("${MODES[@]}" "1600x900 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync")
MODES=("${MODES[@]}" "1920x1080 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync")
MODES=("${MODES[@]}" "800x600 38.25 800 832 912 1024 600 603 607 624 -hsync +vsync")
MODES=("${MODES[@]}" "1024x768 63.50 1024 1072 1176 1328 768 771 775 798 -hsync +vsync")
MODES=("${MODES[@]}" "1152x864 81.75 1152 1216 1336 1520 864 867 871 897 -hsync +vsync")
MODES=("${MODES[@]}" "1280x960 101.25 1280 1360 1488 1696 960 963 967 996 -hsync +vsync")
MODES=("${MODES[@]}" "1280x1024 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync")
################################################################################
CONFIGFILE="/opt/openslx/beamergui/beamer.conf"
################################################################################
#DRIVER=$(lspci -nnk | grep -i vga -A3 | grep 'in use'| awk '{ print $NF }')
XRANDR=$( xrandr )
XRANDRV=$( xrandr --verbose )
################################################################################
echo "$XRANDR"
#echo "$XRANDRV"
# Get the names of the connected outputs
# This is a rigid approach to determine the connected outputs
declare -a OUTPUTNAMES
while read line; do
OUTPUTNAMES+=("$(awk '{print $1}' <<<"$line" )")
done < <( echo "$XRANDR" | grep -E "[[:digit:]]+mm x [[:digit:]]+mm" )
echo -e "Connected outputs: \e[32m${OUTPUTNAMES[@]}\e[0m"
# The goal is to add more modelines to the X server. While this is done the
# screen is flickering. Hence this is just necessary if there is a beamer. Do
# the flickering magic only if there are two outputs and one is a projector.
#Two outputs?
if [ ${#OUTPUTNAMES[@]} -eq 2 ]; then
echo "Two outputs detected."
# Either of them a projector?
BEAMER=
MAYBEAMER=
SMALL=
for i in 0 1; do
WIDTH=$(grep -E "^${OUTPUTNAMES[$i]}.*[0-9]+mm x [0-9]+mm" <<<"$XRANDR" | head -n 1 | grep -o -E ' [0-9]+mm x' | grep -o -E '[0-9]+')
if [ -z "$WIDTH" ] || [ "$WIDTH" -eq 0 ] || [ "$WIDTH" -gt 900 ]; then
echo "Screen $i is beamer, width is '$WIDTH'"
BEAMER=$i
elif [ -n "$WIDTH" ] && [ "$WIDTH" -gt 700 ]; then
MAYBEAMER=$i
elif [ -n "$WIDTH" ] && [ "$WIDTH" -lt 550 ]; then
SMALL=yes
fi
done
if [ -z "$BEAMER" ] && [ -n "$MAYBEAMER" ] && [ -n "$SMALL" ]; then
# This is a hack on top of the other hack; we already treat outputs reporting a sufficiently large width
# as beamers, as we have encountered such devices in the wild. However, we might have just a large TV connected
# that is intended to be used just like a beamer to present the screen to the audience. So if we have a screen
# that is at least 70cm wide and the other one is no wider than 55cm we treat this as a beamer setup aswell.
# The reasoning here is that if it were a dual screen setup, the screens should be roughly the same size.
echo "Treating $MAYBEAMER as beamer as size difference is big enough"
BEAMER=$MAYBEAMER
fi
if [ -n "$BEAMER" ]; then
echo "${OUTPUTNAMES[$BEAMER]} is a beamer. "
# Create all modes, so that X knows them by name "<width>x<height>"
# Add the modes to the outputs, this means that, if this action is
# successful they can be applied to the screens.
for i in "${MODES[@]}"; do
if xrandr --current --newmode $i; then # > /dev/null 2>&1
echo -e "Created mode ${i%% *}."
else
echo -e "\e[31mFailed to create mode ${i%% *}!\e[0m"
fi
for j in "${OUTPUTNAMES[@]}"; do
if xrandr --current --addmode $j $(echo $i| awk '{print $1;}'); then
echo -e "Added mode ${i%% *} to $j."
else
echo -e "\e[31mFailed to add mode ${i%% *} to $j!\e[0m"
break
fi
done
done
# Finally, if the EDID is present, apply a proper resolution.
# Find out whether the beamer transmits reliable EDID data.
# The data in xrandr should be reliable if the EDID is present.
if echo "$XRANDRV" | grep -Pzo \
"^${OUTPUTNAMES[$BEAMER]}\N*\n((\ |\t)+\N*\n)+" \
| grep EDID > /dev/null ; then
echo "${OUTPUTNAMES[$BEAMER]} [Beamer] provides EDID."
# If the breamer transmits the EDID there shall be a preferred resolution.
OPTIMALRES=$(echo "$XRANDRV" \
| grep -Pzo "^${OUTPUTNAMES[$BEAMER]}\N*\n((\ |\t)+\N*\n)+" \
| grep preferred | awk '{print $1}')
# Apply the optimal resolution tho either of the outputs. The beamer has
# to be the secondary output.
if xrandr \
--output ${OUTPUTNAMES[$((1-$BEAMER))]} --mode $OPTIMALRES \
--primary \
--output ${OUTPUTNAMES[$BEAMER]} --mode $OPTIMALRES \
--same-as ${OUTPUTNAMES[$((1-$BEAMER))]}
then
echo "Applied optimal resolution successfully."
fi
elif [[ -f "$CONFIGFILE" ]]; then
echo "Config file found."
# Get local ip
. /opt/openslx/config
# Try to get a probed mode
PROBEDMODE=$(cat $CONFIGFILE | grep $SLX_PXE_CLIENT_IP | cut -d '=' -f2)
# If a probed mode was found, ..
if [[ -n "$PROBEDMODE" ]]; then
echo "Probed mode found in config file."
# Apply the probed mode from the config file
if xrandr \
--output ${OUTPUTNAMES[$((1-$BEAMER))]} --mode $PROBEDMODE \
--primary \
--output ${OUTPUTNAMES[$BEAMER]} --mode $PROBEDMODE \
--same-as ${OUTPUTNAMES[$((1-$BEAMER))]}
then
echo "Applied probed mode successfully."
fi
else
echo -e "\e[31mERROR: Beamer provides no EDID and no probed mode given in $CONFIGFILE.\e[0m"
fi
else
# Apply a fallback mode
echo -e "\e[31mERROR: Beamer provides no EDID and no config file found in $CONFIGFILE. Falling back to 1024x768.\e[0m"
xrandr \
--output ${OUTPUTNAMES[$((1-$BEAMER))]} --mode 1024x768 \
--primary \
--output ${OUTPUTNAMES[$BEAMER]} --mode 1024x768 \
--same-as ${OUTPUTNAMES[$((1-$BEAMER))]}
fi
else
# In case of two monitors just sort the outputs lexicographically and apply
# the preffered resolution
echo "Dualhead setup deteced. Sorting outputs lexicographically."
readarray -t OUTPUTNAMES \
< <(for a in "${OUTPUTNAMES[@]}"; do echo "$a"; done | sort)
echo ${OUTPUTNAMES[@]}
if xrandr \
--output ${OUTPUTNAMES[0]} --preferred \
--primary \
--output ${OUTPUTNAMES[1]} --preferred \
--right-of ${OUTPUTNAMES[0]}
then
echo "Successfully applied preferred modes on outputs in sorted order."
fi
fi
else
echo -e "\e[32mOther than two outputs.\e[0m"
fi
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