#!/bin/bash
#
# convert (essentially from AdobeRGB or CMYK) to sRGB jpg
# and optionally resize
#
#
# From a IM Forum discussion...
# http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=16464&start=15
#
# Curtisy of  Albert25  -- 26 June 2010
#
###

# paths to profile file locations
srgb=/docs/photos/icc/sRGB.icm
cmyk=/docs/photos/icc/USWebCoatedSWOP.icc

# defaults
outdir=.
debug=

# read options
while getopts "dvho:s:a:" opt
do
  case $opt in
    "d|v" ) debug=1;; # verbose is same as debug for now
    "s"   ) size=$OPTARG;;
    "o"   ) outdir=$OPTARG;;
    "a"   ) add_options=$OPTARG;;
    "h"   ) cat <<END_HELP;
Usage: $0 [options] FILE [FILE...]
Options:
    -h                   Print this help
    -d                   Print debugging info while processing
    -v                   Be verbose (same as -d for now)
    -s nnn[xhhh]    Specify new width in pixels or new size as widthxheight (ie -w 640x480)
    -a "im options" Additional options for IM
    -o dir              Output directory
END_HELP
            exit 0;;
  esac
done

shift $(($OPTIND - 1))

if [ -n "$size" ]; then
   resize="-resize $size"
else
   resize=
fi

shopt -s nullglob
for f in "$@"
do
   # skip if not jpeg or tiff
   #[[ "$f" =~ '\.(jpe?g|tiff?)$' ]] || continue

   dir=$(dirname "$f")
   name=$(basename "$f")
   base=${name%.*}

   profile="/tmp/$base.icc"

   out="$outdir/$base-x$size.jpg"

   # extract possible color profile
   [ -n "$debug" ] && echo "    extracting profile $f"
   convert "$f" "$profile" 2>/dev/null

   [ -n "$debug" ] && echo "    resize = $resize"

   if [ -s "$profile" ]; then
      # we have an embedded profile, so ImageMagick will use that anyway
      [ -n "$debug" ] && echo "    convert with embedded profile $f"
      convert "$f" -profile "$srgb" +profile '*' $resize $add_options "$out" \
      && echo -e "\tOK $out"
   else
      # no embedded profile in source
      if identify -format "%r" "$f" | grep CMYK >/dev/null ; then
         # CMYK file without embedded profile
         [ -n "$debug" ] && echo "    convert cmyk without embedded profile $f"
         convert "$f" -profile "$cmyk" -profile "$srgb" +profile '*' $resize $add_options "$out" \
         && echo -e "\tOK $out"
         # alternative would be
         #convert "$f" -colorspace RGB -resize $size "$out"
      else
         # No profile and not CMYK. Probably already in RGB. Just resize
         [ -n "$debug" ] && echo "    resizing only $f"
         convert "$f" $resize $add_options "$out" \
         && echo -e "\tOK $out"
      fi
   fi
   [ -f "$profile" ] && rm "$profile"
done