#!/bin/bash

"""
    A script to set up a new mode
    version 1 20150603
    version 2 add check for three parameters
    version 3 use zenity to enter parameters for gtf
    version 4 20160704 New mode name actually now works.
              Add four extra digits to mode name to make conflict
              with an existing mode name less likely
"""

# get parameters for gtf
hvf=$(zenity --forms --title="Screen Resolution Setter" \
             --separator=" " \
             --add-entry="# of Horizontal pixels: " \
             --add-entry="# of Vertical pixels: " \
       -     --add-entry="Frequency: ")
echo ""
echo ""
echo "horiz, vert, frequency: $hvf"

# get the modeline from gtf
modeline=$(gtf $hvf)
modeline=$(echo "$modeline" | tail -n 1)
echo "modeline = $modeline"

# strip mode name from modeline
modeline_sans_name=$(echo $modeline | awk '{$1=""; $2="";print}')
echo "modeline_sans_name = $modeline_sans_name"

# create new mode name - must be unique
hvf=($hvf)
mode=${hvf[0]}x${hvf[1]}_$(($(date +%N)/100000))
echo "mode = $mode"

# now we adapt my old xrandr_1680x1050.sh script
#xrandr --newmode 1680x1050 147.14  1680 1784 1968 2256  1050 1051 1054 1087  -HSync +Vsync
#xrandr --addmode $screen 1680x1050
#xrandr --output $screen --mode 1680x1050

# get name of screen
screen=$(xrandr | grep \ connected | awk '{print $1}')
echo "$screen"

# notify xrandr of new mode
newmode1="xrandr --newmode $mode $modeline_sans_name"
$newmode1
echo "newmode1 = $newmode1"

# made new mode accessible to $screen
newmode2=$(xrandr --addmode $screen $mode)
$newmode2
echo "newmode2 = $newmode2"

# switch to new mode
mode_switch=$(echo "xrandr --output $screen --mode $mode")
# uncomment the following line to implement resolution switching
## $mode_switch
echo "mode_switch = $mode_switch"

nvidia-xconfig --mode 1366x768