There is now a Barcode Font Generator on NPM. You can install it with
npm install -g barcode-font-generator
Then you can create your own barcode font with a simple command like this:
barf -n "Test"; -h 35 -c "code39"
It will create a folder containing the font in .svg, .ttf, .woff and .eot format as well as a sample .html file using the font.
for now only the height of the bars can be manipulated. I will ad some mor features when i find the time.
if you want to hack on the generator yourself, you can of cause clone or fork from the repository on github
Holger Will 