#! /bin/sh

# Convert svg file to png with a target width and height
# width and height are derived from the directory name
# of the target. Width and height must be equal

# Arg1: Source svg file
# Arg2: Filename for copyright notice
# Arg3: Target png file

# Extract the icon width from the target path e.g.
# src/ui/gui/icons/48x48/actions/file-save.png
# should result in a width of 48
stripprefix=${3#src*icons\/}
width=${stripprefix%%x*}

# If no width can be extracted from the destination path
# then take the natural width by setting width to 0
case "$width" in
    [0-9][0-9]|[0-9][0-9][0-9])  ;;
    *)                 width="0";;
esac

echo "Converting" $1 "to" $3 "size" $width"x"$width

comment=`cat $2`
gimp -i -d -b "\
(let* ((image (car (file-svg-load 1 \"$1\" \"$1\" 90 $width $width 0 ))))
      (gimp-image-attach-parasite image '(\"gimp-comment\" 0 \"$comment\"))
      (gimp-file-save 1 image (car (gimp-image-get-active-drawable image))
		      \"$3\" \"$3\"))
    (gimp-quit 1)"