pngcrush.sh

   1 #!/bin/bash
   2
   3 png=$1
   4 out=$2
   5
   6 steps=()
   7
   8 src=${out}.src.png
   9 dst=${out}.dst.png
  10
  11 copy=("${src}" "${dst}")
  12
  13 function step() {
  14     "$@"
  15     mv -f "${dst}" "${src}"
  16     steps+=($(stat -f "%z" "${src}"))
  17 }
  18
  19 pngcrush=$(xcode-select --print-path)/Platforms/iPhoneOS.platform/Developer/usr/bin/pngcrush
  20
  21 if grep CgBI "${png}" &>/dev/null; then
  22     if [[ ${png} != ${out} ]]; then
  23         cp -a "${png}" "${out}"
  24     fi
  25
  26     exit 0
  27 fi
  28
  29 step cp -fa "${png}" "${dst}"
  30
  31 #step "${pngcrush}" -q -rem alla -reduce -brute -iphone "${copy[@]}"
  32
  33 #step "${pngcrush}" -q -rem alla -reduce -brute "${copy[@]}"
  34 #step pincrush "${copy[@]}"
  35
  36 step "${pngcrush}" -q -rem alla -reduce -iphone "${copy[@]}"
  37
  38 #"${pngcrush}" -q -rem alla -reduce -brute -iphone "${png}" 1.png
  39 #"${pngcrush}" -q -iphone _.png 2.png
  40 #ls -la 1.png 2.png
  41
  42 mv -f "${src}" "${out}"
  43
  44 echo -n "${png##*/} "
  45 for ((i = 0; i != ${#steps[@]}; ++i)); do
  46     if [[ $i != 0 ]]; then
  47         echo -n " "
  48     fi
  49
  50     echo -n "${steps[i]}"
  51 done
  52
  53 printf $' %.0f%%\n' "$((steps[${#steps[@]}-1] * 100 / steps[0]))"