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#!/bin/bash
# Defaults
# Taken from https://github.com/guimeira/i3lock-fancy-multimonitor
#
# Modified to remove TEXT option & logic,
# and use /home/<user>/.config/i3lock
# dir for images.
DISPLAY_RE="([0-9]+)x([0-9]+)\\+([0-9]+)\\+([0-9]+)"
IMAGE_RE="([0-9]+)x([0-9]+)"
FOLDER="/home/$(whoami)/.config/i3lock"
LOCK="$FOLDER/lock.png"
PARAMS=""
OUTPUT_IMAGE="/tmp/i3lock.png"
PIXELATE=true
BLURTYPE="1x1"
# Read user input
POSITIONAL=()
for i in "$@"
do
case $i in
-h|--help)
echo "lock: Syntax: lock [-n|--no-text] [-p|--pixelate] [-b=VAL|--blur=VAL]"
echo "for correct blur values, read: http://www.imagemagick.org/Usage/blur/#blur_args"
exit
shift
;;
-b=*|--blur=*)
VAL="${i#*=}"
BLURTYPE=(${VAL//=/ })
shift
;;
-p|--pixelate)
PIXELATE=false
shift # past argument
;;
*) # unknown option
echo "unknown option: $i"
exit
POSITIONAL+=("$1") # save it in an array for later
shift # past argument
;;
esac
done
set -- "${POSITIONAL[@]}" # restore positional parameters
#Take screenshot:
scrot -z $OUTPUT_IMAGE
#Get dimensions of the lock image:
LOCK_IMAGE_INFO=`identify $LOCK`
[[ $LOCK_IMAGE_INFO =~ $IMAGE_RE ]]
IMAGE_WIDTH=${BASH_REMATCH[1]}
IMAGE_HEIGHT=${BASH_REMATCH[2]}
#Execute xrandr to get information about the monitors:
while read LINE
do
#If we are reading the line that contains the position information:
if [[ $LINE =~ $DISPLAY_RE ]]; then
#Extract information and append some parameters to the ones that will be given to ImageMagick:
WIDTH=${BASH_REMATCH[1]}
HEIGHT=${BASH_REMATCH[2]}
X=${BASH_REMATCH[3]}
Y=${BASH_REMATCH[4]}
POS_X=$(($X+$WIDTH/2-$IMAGE_WIDTH/2))
POS_Y=$(($Y+$HEIGHT/2-$IMAGE_HEIGHT/2))
PARAMS="$PARAMS '$LOCK' '-geometry' '+$POS_X+$POS_Y' '-composite'"
fi
done <<<"`xrandr`"
#Execute ImageMagick:
if $PIXELATE ; then
PARAMS="'$OUTPUT_IMAGE' '-scale' '10%' '-scale' '1000%' $PARAMS '$OUTPUT_IMAGE'"
else
PARAMS="'$OUTPUT_IMAGE' '-level' '0%,100%,0.6' '-blur' '$BLURTYPE' $PARAMS '$OUTPUT_IMAGE'"
fi
eval convert $PARAMS
#Lock the screen:
i3lock -i $OUTPUT_IMAGE -t
#Remove the generated image:
rm $OUTPUT_IMAGE