Recipe for creating Windows ICO files with ImageMagick?

Question

I would like to create .ico icon for my Windows application dynamically (from the SVG file) by using ImageMagick. How do I do that?

Microsoft lists vari

Answer 1

It doesn't seem like ImageMagick alone can do this as it does not handle SVG resizing in a sane way (but instead resizes the SVG only after rasterizing which produces a horrid result)

By using inkscape to do the conversion it appears to be possible though, e.g. The following one liner should give you a usable icon with all icon sizes:

mkdir temp; declare -a res=(16 24 32 48 64 128 256); for f in *.svg; do for r in "${res[@]}"; do inkscape -z -e temp/${f}${r}.png -w $r -h $r $f; done; resm=( "${res[@]/#/temp/$f}" ); resm=( "${resm[@]/%/.png}" ); convert "${resm[@]}" ${f%%.*}.ico; done; rm -rf temp;

The above will not however give you 8 and 4 bit icons within the file (I think these are only needed for older windows versions that are no longer supported) It should be possible with a bit more work to have it do these if you need them.