#! /bin/sh
## Initialisation of panorama
## Copyright (C) 2006 by Peter J. Gawthrop
## This may be freely used under the GNU Public License (GPL).

gpx=`echo *gpx`

if [ -n $gpx ]; then
    echo "Geotagging using $gpx"
else
    echo "No gpx file founf - not geotagging"
fi

bracket() {
    bracket_value=`exiftool $1| grep "AEB Bracket Value" | awk '{print $5}'`
}

init_pano() {
  if [ -d "Exposure_0" ]; then
      echo "Panorama already initialised"
      exit   
  fi


## Geotag
  if [ -n $gpx ]; then
      ln -s ../$gpx
      GpsPhoto
  fi

  Rotate

  mkdir  Exposure_0
  mkdir  Exposure_over
  mkdir  Exposure_under
  count=-1
  numbers=""
  for image in ${images}; do
    bracket $image
    ##echo $image ${bracket_value}
    if [ "${bracket_value}" -eq "0" ]; then
      let count=${count}+1
      numbers="$numbers $count"
      ln -s ../${image} Exposure_0/${count}.jpg
    fi 
    if [ "${bracket_value}" -lt "0" ]; then
      ln -s ../${image} Exposure_under/${count}.jpg
    fi
    if [ "${bracket_value}" -gt "0" ]; then
      ln -s ../${image} Exposure_over/${count}.jpg
    fi
  done
 
  let total=${count}+1
  echo $total images initialised
}

merge_images() {
    for number in $numbers; do
	echo "Blending image $number"
	Blend Exposure_0/$number.jpg Exposure_under/$number.jpg Exposure_over/$number.jpg $number.jpg
    done
}

## Main part.
Lowercase
images=`ls img_????.jpg 2>/dev/null`
subdirs="Exposure_0 Exposure_under Exposure_over"
this=`basename $PWD`
if [ -z "${images}" ]; then # Recurse
    dirs=`ls`
    for dir in $dirs; do
	if [ -d "$dir" ]; then
	    echo "Doing dir $dir"
	    (cd $dir; pano_init)
	fi
    done
else # Initialise
    N=`ls img_????.jpg | grep -c jpg`
    if [ "$N" -eq 24 ]; then
       echo "Initialising panoramas in ${this} ($N images)"
       init_pano
    else
       echo "Incorrect number of images ($N) in $this"
    fi
fi

merge_images;