#####!/bin/bash
# imgdump.sh 11/26/09
# Periodically dumps an app window as a series of gif files
# Requires import from the imagemagick package
# Requires wmctrl to automatically focus window
# Usage: Edit below to set dump interval in seconds or to change names
# Window name must match the running app exactly, app must be running
# Run script to start recording, first image saved after 10 seconds
# Run script again to stop recording (removes the dump_running file)
# File numbers start at 1000, delete imgdump.ini to reset count
# -------- setup --------------
outdir="imgdump"           # name of directory to save images to
ininame="imgdump.ini"      # name of file to record image number
runfile="dump_running"     # name of file to indicate script is running
window="mevo"              # name of window to dump
interval=60                # number of seconds between dumps
fbase="dump"               # base name for images
fext=".gif"                # extension for images
n=1000                     # starting number for images
# -----------------------------
cd `dirname $0`            # change to working directory
if [ -e $runfile ]; then   # if run with run file present
 rm $runfile               # delete run file
 killall `basename $0`     # stop all instances of this script
else  # run script
 if [ ! -e $outdir ]; then # if output directory not found
  mkdir $outdir            # make output directory
 fi
 echo "delete this to stop dump" > $runfile  # make control file
 if [ -e $ininame ]; then  # if counter ini exists
  read n dummy < $ininame  # set counter
 else
  echo $n > $ininame       # otherwise reset counter ini
 fi
 sleep 10  # initial delay to focus window to dump
 while [ -e $runfile ]; do
  outfile="$outdir/$fbase$n$fext"
  if [ -e $outfile ]; then
   rm $outfile  # remove file if it exists
  fi
  wmctrl -Fa $window               # focus app window
  import -window $window $outfile  # dump app screen to file
  if [ "$?" -eq 0 ]; then  # if dump was successful
   n=$[ $n + 1 ]           # next file number
   echo $n > $ininame      # update counter ini
   sleep $interval         # wait until next dump time
  else # app is no longer running, terminate
   rm $runfile
  fi
 done
 if [ -e $runfile ]; then
  rm $runfile  # remove run file if it exists
 fi
fi