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February 19, 2018 14:25
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resize images two and three times
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| #! /bin/bash | |
| # prerequisites: libvips http://www.vips.ecs.soton.ac.uk | |
| # http://www.vips.ecs.soton.ac.uk/supported/current/doc/html/libvips/libvips-resample.html#vips-resize | |
| # filename should looks like: `filename.jpg` | |
| cwd=$(pwd) | |
| # re='_([0-9]{2,4})\.(jpg|png)' | |
| re='\.(jpg|jpeg|png)' | |
| resize() | |
| { | |
| # new_width=$(echo "$(vipsheader $1 -f width)"*$2 | bc) | |
| # new_height=$(echo "$(vipsheader $1 -f height)"*$2 | bc) | |
| ext=$(echo ${1##*.}) | |
| new_filename=$(echo "${1//$(echo $1 | grep -ioE $re)}") | |
| # result=$new_filename'_'$new_width'x'$new_height'@'$2'x'.$ext | |
| result=$new_filename'_@'$2'x'.$ext | |
| vips resize $filename $result $2 | |
| } | |
| for f in $cwd/*; do | |
| path=$(basename "$f") | |
| filename=$(echo $path | grep -iE $re) | |
| if [[ $filename ]]; then | |
| resize $filename '2' && resize $filename '3' | |
| fi | |
| done |
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change ext variable