-comment=`cat $2`
-gimp -i -b "\
-(let* ((image (car (gimp-file-load 1 \"$1\" \"$1\"))))
- (gimp-image-attach-parasite image (list \"gimp-comment\" 0 \"$comment\"))
+# 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 (gimp --version) >/dev/null 2>&1; then
+ echo "Converting $1 to $3 size $widthx$width with GIMP"
+ comment=`cat $2`
+ # If no width can be extracted from the destination path
+ # then take the natural width by setting width to 0
+ case "$width" in
+ [0-9][0-9] | [0-9][0-9][0-9]) ;;
+ *) width="0";;
+ esac
+ 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\"))