#!/usr/bin/fish
set offset 0
set 1 $argv[1]
set 2 $argv[2]
if test $argv[3]
    set offset $argv[3]
end

set h1 (identify -format %h "$1")
set h2 (identify -format %h "$2")

if test $h1 -ne $h2
    exit
end


set w1 (identify -format %w "$1")
set w2 (identify -format %w "$2")
set drop (math $w1+$offset)
set width (math $drop+$w2)

set out "$(dirname "$1")/tran_$(basename "$1")"
set work (mktemp)

jpegtran -outfile $work -crop $width $1
jpegtran -outfile $out -drop +$drop $2 $work
rm $work