mk_polaroid_stack(){ local stackfiles=( "$@" ) local CONVERT="convert -quality 01" # this assignment not used in script, just for standalone demo purposes WORK_DIR=`pwd` for i in ${!stackfiles[@]}; do # Use a 'random' angle local angle=$((RANDOM %45 +1)) local angle=$(( (angle / 2) * 2 )) # thumbnail to 120x80 (just dvd for now) TODO get rid of magic numbers $CONVERT "${stackfiles[i]}" -background none -thumbnail 120x80\! \ -bordercolor '#EAEAEA' -shave 4x4 +repage -border 4x4 \ -rotate $angle "$WORK_DIR/tnail${i%.*}.png" stack_files[i]=$WORK_DIR/tnail${i%.*}.png # Composite the polaroid over the canvas # get 'random' coordinates local rand_xloc=$((RANDOM %400 +80)) local rand_yloc=$((RANDOM %200 +50)) local rand_loc="+${rand_xloc}+${rand_yloc}" local img_page[i]="-page $rand_loc" done for i in ${!stack_files[@]}; do local image_page=( "${image_page[@]}" ${img_page[i]} "${stack_files[i]}" ) done $CONVERT -background none -size 640x480 xc:none \ "${image_page[@]}" -mosaic -trim +repage miff:- | $CONVERT -size 720x480 xc:black -background none \ -gravity Center -geometry +0+0 - -composite \ "$WORK_DIR/image_stack.png"}