Simple wrapper script to take nicer X11 screenshots, that look alike with either SSD or CSD windows.

screenshot

#!/bin/bash

# Simple wrapper script to take nicer X11 screenshots:
#   - uniform appearance whether the target window is using server-side or client-side decorations ;
#   - wallpaper and background removed ;
#   - shadow effect ;
#   - always sending the result to the clipboard.
#
# Prerequisites:
#   - X11 environment and basic utilities (xprop, import);
#   - *maim* screenshot utility ;
#   - *xdotool* ;
#   - *xclip* ;
#   - *imagemagick* tools (convert) ;
#   - libnotify along with the *notify-send* command ;
#
# All these should be installed by default on most Linux distributions or just one install command away from the standard repositories.
# Note that it will not work with environments using Wayland.

set -e
PATH=$(/usr/bin/getconf PATH)

function Usage {
    echo -e "Usage: $0 {desktop|zone|window} [delay]\n\tdelay: in seconds"
    exit 1
}

([[ $# -eq 0 ]] || [[ $# -gt 2 ]]) && Usage

COMMAND=$1
DELAY=${2-0}

[[ $DELAY =~ ^-?[0-9]+$ ]] || Usage

DATE=$(date +%Y%m%d-%H%M%S)
FILENAME=$DATE.png
DEST=$HOME/Images/$FILENAME # SET AT YOUR CONVENIENCE

case $COMMAND in
    desktop)
        maim -x :0.0 -d $DELAY $DEST
        ;;
    zone)
        maim -s -d $DELAY $DEST
        ;;
    window)
        NOCSD_PROP="_NET_FRAME_EXTENTS(CARDINAL)"
        WINID=$(xdotool selectwindow)
        if [[ -z $(xprop -id $WINID | grep $NOCSD_PROP) ]]
        then
            maim -d $DELAY -i $WINID $DEST
        else
            import -delay $DELAY -window $WINID -frame $DEST
            convert $DEST \( +clone -background black -shadow 40x20+0+0 \) +swap -background none -layers merge +repage $DEST
        fi
        ;;
    *)
        Usage
esac

xclip -selection clipboard -t image/png $DEST

notify-send -t 5000 -u low -i gnome-screenshot "Screenshot" "$COMMAND, delay = $DELAY sec.\nPicture sent to the clipboard and saved in file: $DEST."

exit 0