development/MacOSX/svg2icns.sh

   1 #! /bin/bash
   2 ###
   3 ### svg2icns.sh
   4 ###   Create ICNS file from SVG
   5 ###   https://gist.github.com/plroebuck/af19a26c908838c7f9e363c571199deb
   6 ###
   7 ### See also:
   8 ###   <https://stackoverflow.com/questions/12306223/how-to-manually-create-icns-files-using-iconutil#39678276>
   9 ###   <https://developer.apple.com/library/content/documentation/GraphicsAnimation/Conceptual/HighResolutionOSX/Optimizing/Optimizing.html>
  10 ###
  11
  12 script="$(basename $0 .sh)"
  13
  14 PATH=/Applications/Inkscape.app/Contents/MacOS:/Applications/Inkscape.app/Contents/Resources/bin:"$PATH"
  15
  16 CONVERT_BIN=$(which inkscape)
  17 : ${CONVERT_BIN?Requires Inkscape to be installed}
  18
  19 ## Usage function
  20 usage() {
  21     cat <<END_USAGE >&2
  22 Usage: ${script} <svgfilename> [<icnsfilename>]
  23   svgfilename:  input file in SVG format
  24   icnsfilename: output file in ICNS format (optional)
  25
  26 END_USAGE
  27 }
  28
  29 ## Call usage() function if args not supplied
  30 argc="$#"
  31 if [[ "$argc" -lt 1 ]] || [[ "$argc" -gt 2 ]];
  32 then
  33     usage
  34     exit 1
  35 fi
  36
  37 ## Verify first positional argument
  38 svgfilename="$1"
  39 if [ ! -f "${svgfilename}" ];
  40 then
  41     usage
  42     echo "${script}: no such file: ${svgfilename}" >&2
  43     exit 1
  44 else
  45     ## Verify scalable vector graphics file
  46     $(file "${svgfilename}" | cut -d':' -f2- | grep -qs 'SVG')
  47     if [ "$?" -ne 0 ];
  48     then
  49         usage
  50         echo "${script}: SVG file required: ${svgfilename}" >&2
  51         exit 1
  52     fi
  53 fi
  54
  55 ## Verify second positional argument if given
  56 if [ "$argc" -eq 2 ];
  57 then
  58     icnsfilename="$2"
  59     if [ -n "${icnsfilename}" ];
  60     then
  61         ## Ensure file extension
  62         ext=${icnsfilename##*.}
  63         if [ "$ext" != "icns" ];
  64         then
  65             icnsfilename="${icnsfilename}.icns"
  66         fi
  67     else
  68         ## Given empty string as second arg
  69         icnsfilename="${svgfilename%.*}.icns"
  70     fi
  71 else
  72     ## No second arg
  73     icnsfilename="${svgfilename%.*}.icns"
  74 fi
  75
  76 ## Create iconset directory if necessary
  77 iconsetdirname=/tmp/$(basename "${icnsfilename}" .icns)-$$.iconset
  78 mkdir -p "${iconsetdirname}"
  79
  80 ##+---------------------+--------------------+--------------+
  81 ##|      filename       | resolution, pixels | density, PPI |
  82 ##+---------------------+--------------------+--------------+
  83 ##| icon_16x16.png      | 16x16              |           72 |
  84 ##| icon_16x16@2x.png   | 32x32              |          144 |
  85 ##| icon_32x32.png      | 32x32              |           72 |
  86 ##| icon_32x32@2x.png   | 64x64              |          144 |
  87 ##| icon_128x128.png    | 128x128            |           72 |
  88 ##| icon_128x128@2x.png | 256x256            |          144 |
  89 ##| icon_256x256.png    | 256x256            |           72 |
  90 ##| icon_256x256@2x.png | 512x512            |          144 |
  91 ##| icon_512x512.png    | 512x512            |           72 |
  92 ##| icon_512x512@2x.png | 1024x1024          |          144 |
  93 ##+---------------------+--------------------+--------------+
  94
  95 ## Create PNG files as described in table
  96 sizes=( 16 32 128 256 512 )
  97 densities=( 72 144 )
  98
  99 for size in "${sizes[@]}"
 100 do
 101     dimen="${size}x${size}"
 102     for density in "${densities[@]}"
 103     do
 104         if [ "${density}" == "72" ];
 105         then
 106             ## std
 107             resolution="${dimen}"
 108             scale=""
 109         else
 110             ## hires
 111             resolution="$(( $size * 2 ))x$(( $size * 2 ))"
 112             scale="@2x"
 113         fi
 114         pngfilename="${iconsetdirname}/icon_${dimen}${scale}.png"
 115                   inkscape --export-type=png -w $size -h $size -o "${pngfilename}" "${svgfilename}"
 116         if [ "$?" -ne 0 ];
 117         then
 118             echo "${script}: error creating icon file: ${pngfilename}" >&2
 119             exit 1
 120         fi
 121     done
 122 done
 123
 124 ## Convert iconset to ICNS file
 125 iconutil --convert icns --output "${icnsfilename}" "${iconsetdirname}"
 126 if [ "$?" -ne 0 ];
 127 then
 128     echo "${script}: error converting iconset to ICNS: ${iconsetdirname}" >&2
 129     exit 1
 130 else
 131     rm -rf "${iconsetdirname}"
 132 fi
 133
 134 exit 0