[beamergui] Added Xsetup script for beamergui

1 files changed, 93 insertions, 0 deletions

diff --git a/remote/modules/beamergui/data/etc/X11/Xsetup.d/99-beamergui-mode_setter b/remote/modules/beamergui/data/etc/X11/Xsetup.d/99-beamergui-mode_setter
new file mode 100755
index 00000000..f58933e2
--- /dev/null
+++ b/remote/modules/beamergui/data/etc/X11/Xsetup.d/99-beamergui-mode_setter
@@ -0,0 +1,93 @@
+#! /bin/bash
+# This script explicitely needs bash for the arrays
+
+## This script adds the common resolutions to the Xserver if and only if there
+## is a beamer connected. If additionally 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=("${MODES[@]}" "1280x1024 109.00  1280 1368 1496 1712  1024 1027 1034 1063 -hsync +vsync")
+################################################################################
+
+# Get initial information about the screend from xrandr
+XRANDR=$( xrandr --current )
+XRANDRV=$( xrandr --current --verbose )
+
+# Get the names of the connected outputs 
+declare -a OUTPUTNAMES
+while read line; do
+  OUTPUTNAMES+=("$(echo "$line" | grep -o "^\S*" )")
+done < <( echo "$XRANDR" | grep -i " connected" )
+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.
+if [ ${#OUTPUTNAMES[@]} -eq 2 ]; then
+  if ! ( echo "$XRANDR" | egrep \
+    "^${OUTPUTNAMES[0]}.*[[:digit:]]{2,}mm x [[:digit:]]{2,}mm" > /dev/null \
+    && echo "$XRANDR" | egrep \
+    "^${OUTPUTNAMES[1]}.*[[:digit:]]{2,}mm x [[:digit:]]{2,}mm" > /dev/null )
+  then    
+
+    # Create all modes, so that X knows them by name "<width>x<height>"
+    for i in "${MODES[@]}"; do
+      xrandr --current --newmode $i > /dev/null 2>&1 
+    done
+
+    # Add the modes to the outputs, this means that, if this action is
+    # successful they can be applied to the screens.
+    for i in "${OUTPUTNAMES[@]}"; do 
+      for j in "${MODES[@]}"; do 
+        xrandr --current --addmode $i $(echo $j| awk '{print $1;}')
+      done
+    done
+
+    # Check which of the outputs is the beamer. Just for reference.
+    if [[ -z "$(echo "$XRANDR" | egrep \
+      "^${OUTPUTNAMES[0]}.*[[:digit:]]{2,}mm x [[:digit:]]{2,}mm")" ]]; then
+      BEAMER=0;
+    else
+      BEAMER=1;
+    fi
+    # echo -ne "${OUTPUTNAMES[$BEAMER]} is a beamer. "
+
+    ## Finally if the EDID is present apply a proper resolution.
+    # Find out, if the beamer transmits reliable EDID data. The data in xrandr
+    # should be reliable if the EDID is present.
+    if echo "$XRANDRV" | grep -Pzo \
+      "^${OUTPUTNAMES[$BEAMER]}\N*\n((\ |\t)+\N*\n)+" \
+      | grep EDID > /dev/null ; then
+
+      #echo "EDID present"
+
+
+      # If the breamer transmits the EDID there shall be a preferred resolution.
+      OPTIMALRES=$(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.
+      xrandr \
+        --output ${OUTPUTNAMES[$((1-$BEAMER))]} --mode $OPTIMALRES \
+        --primary \
+        --output ${OUTPUTNAMES[$BEAMER]} --mode $OPTIMALRES \
+        --same-as ${OUTPUTNAMES[$((1-$BEAMER))]}
+    fi
+  fi
+fi