Embeds an image in svg

img-to-svg.js

var fs = require('fs'),
    sizeOf = require('image-size');

function usage() {
  console.log('usage: node img-to-svg.js {input}');
  process.exit(1);
}

function template(data) {
  return '<svg xmlns="http://www.w3.org/2000/svg" \n' +
         '  xmlns:xlink="http://www.w3.org/1999/xlink" \n' +
         '  width="' + data.width + 'px" height="' + data.height + 'px">\n' +
         '  <g>\n' +
         '    <image x="0" y="0" width="' + data.width + 'px" height="' + data.height + 'px" xlink:href="data:image/' + ext + ';base64,' + data.base64 + '" />\n' +
         '  </g>\n' +
         '</svg>';
}

if(process.argv.length != 3) {
  usage();
}

var src = process.argv[2],
    dest = src.replace(/\.[^\.]+$/, '.svg'),
    ext = src.match(/\.([^\.]+)$/)[1],
    dim = sizeOf(src);

fs.writeFileSync(dest, template({
  width: dim.width,
  height: dim.height,
  base64: fs.readFileSync(src).toString('base64'),
  ext: ext
}));