pngcrush.sh

   1 #!/bin/bash
   2
   3 png=$1
   4 out=$2
   5
   6 steps=()
   7
   8 function step() {
   9     "$@"
  10     mv -f {_,}_.png
  11     steps+=($(stat -f "%z" _.png))
  12 }
  13
  14 pngcrush=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/pngcrush
  15
  16 if grep CgBI "${png}" &>/dev/null; then
  17     if [[ ${png} != ${out} ]]; then
  18         cp -a "${png}" "${out}"
  19     fi
  20
  21     exit 0
  22 fi
  23
  24 step cp -fa "${png}" __.png
  25
  26 #step "${pngcrush}" -q -rem alla -reduce -brute -iphone {,_}_.png
  27
  28 #step "${pngcrush}" -q -rem alla -reduce -brute {,_}_.png
  29 #step pincrush {,_}_.png
  30
  31 step "${pngcrush}" -q -rem alla -reduce -iphone {,_}_.png
  32
  33 #"${pngcrush}" -q -rem alla -reduce -brute -iphone "${png}" 1.png
  34 #"${pngcrush}" -q -iphone _.png 2.png
  35 #ls -la 1.png 2.png
  36
  37 mv -f _.png "${out}"
  38
  39 echo -n "${png##*/} "
  40 for ((i = 0; i != ${#steps[@]}; ++i)); do
  41     if [[ $i != 0 ]]; then
  42         echo -n " "
  43     fi
  44
  45     echo -n "${steps[i]}"
  46 done
  47
  48 printf $' %.0f%%\n' "$((steps[${#steps[@]}-1] * 100 / steps[0]))"