Gnome Screen Magnfication Script

zoom.sh

#!/bin/bash

magFloor="1.0"
magDelta="0.2"
magFactor=`gsettings get org.gnome.desktop.a11y.magnifier mag-factor`

if [ -z "$1" ]; then
    magFactor=$magFloor
elif [ "$1" == "in" ]; then
    magFactor=`echo "$magFactor + $magDelta" | bc`
elif [ "$1" == "out" ]; then
    magFactor=`echo "$magFactor - $magDelta" | bc`
else
    echo "Usage: `basename $0` < in | out >"
    exit 1
fi


zoomEnabled="true"
if [ `echo $magFactor' <= '$magFloor | bc` == 1 ]; then
    zoomEnabled="false"
    magFactor=$magFloor
fi


`gsettings set org.gnome.desktop.a11y.applications screen-magnifier-enabled $zoomEnabled`
`gsettings set org.gnome.desktop.a11y.magnifier mag-factor $magFactor`