composeWands

#! /bin/bash
#
# imagemagick script for merging a texture background image
# with separate images of wands that we produced for the
# 7th birthday party of our twins
#
# 2018-02-02

# sample texture
bgTexture=TEXTURE_C.jpg

# test image
# theIM=wands/IMG_9391.jpg

# with this size
sz='2224x2983'
# for debugging, this smaller one is also good
# sz='300x400'

# run of just echo some details.
doRun=true

# loop over all wand images
for f in wands/*.jpg; do

  if [[ ${doRun} == "true" ]]; then
    # resize and darken the bg texture (so that merging works better)
    magick \( ${bgTexture} -resize ${sz} -evaluate subtract 35%  \) \
      \( ${f} -rotate -90 -resize ${sz} \
      -auto-level -evaluate add 7%    \) \
      -compose Darken_Intensity -composite \
      composites/comp_$(basename ${f%%.*}).png
  else
    echo "only debugging ${f} for $(basename ${f}) in $(dirname ${f})"
    echo "-> composites/comp_$(basename ${f%%.*}).png"
  fi

done