Graphicsmagick gm convert svg string buffer to sized jpg with 300 DPI setting

index.js

var gm = require('gm');
var source = '<?xml version="1.0" encoding="utf-8"?><svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 2550 3300" enable-background="new 0 0 2550 3300" xml:space="preserve"><g><path fill="#53381A" stroke="#1C1308" d="M807.6,1092.5L527.3,1067c-636.9-25.5-509.5,0-458.6,509.5c51,203.8,0,331.2,254.8,331.2 L807.6,1092.5z"/><path fill="#8A5B28" stroke="#1C1308" d="M909.5,1143.5H629.2c-636.9-25.5-509.5,0-458.6,509.5c51,203.8,25.5,305.7,305.7,229.3 L909.5,1143.5z"/><path fill="#454F2E" stroke="#1C1308" d="M807.6,990.6c127.4-254.8,76.4-305.7,458.6-254.8c509.5,127.4,509.5,152.9,891.6,152.9 c254.8,25.5,509.5,101.9,254.8,407.6l-280.2,509.5H450.9L807.6,990.6z"/><path fill="#76894C" stroke="#1C1308" d="M323.5,1703.9v178.3l1146.4,458.6v-178.3L323.5,1703.9z M807.6,990.6 c127.4-254.8,76.4-305.7,382.1-203.8c509.5,152.9,254.8,152.9,789.7,152.9c254.8,25.5,458.6,101.9,254.8,407.6L1954,1856.8 L527.3,1627.5L807.6,990.6z"/><path fill="#8E996C" stroke="#1C1308" d="M323.5,1703.9c-76.4-254.8,51-229.3,254.8-254.8c254.8-25.5,942.6,178.3,509.5,178.3 c-305.7,25.5-305.7,0-305.7,254.8L323.5,1703.9z M782.1,1882.3c-51-356.7,331.2-203.8,509.5-254.8l178.3,76.4v458.6L782.1,1882.3z" /><path fill="#53381A" stroke="#1C1308" d="M1444.4,1933.2c25.5,509.5,0,484,458.6,484c509.5,0,433.1,0,484-433.1 c0-433.1-25.5-407.6-458.6-458.6C1419,1500.1,1444.4,1525.6,1444.4,1933.2z"/><path fill="#8A5B28" stroke="#1C1308" d="M1520.9,1984.2c25.5,509.5,0,484,458.6,484c509.5,0,433.1,0,484-433.1 c0-433.1-25.5-407.6-458.6-458.6C1495.4,1551.1,1520.9,1576.6,1520.9,1984.2z"/></g></svg>';

var buf = new Buffer(source);
gm(buf, 'svg.svg')
    .resize(2550, 3300)
    .density(300, 300)
    .noProfile()
    .write('./out.jpg', function (err) {
        if (err) {
            console.log(err);
        } else {
            console.log('done');
        }
    });