Why are devanagari characters rendered differently from pdfkit?

[brandoncc]

Hello,

Thank you for this awesome project!

I am having trouble printing devanagari characters, and I'm not sure why. I have created an example using the Martel devanagari font from Google Fonts using the following files:

• svg_content.svg

<svg viewBox="0 0 5500 5500" version="1.1" xmlns="http://www.w3.org/2000/svg">
  <text>
    <tspan x="650" y="-300" textLength="402.4" fill="#333333" style="font-size:232.19814241486068px;font-family:martel-devanagari;">
      हैप्पी
    </tspan>
  </text>
</svg>

• text_content.txt

हैप्पी

• pdfkit.js

const PDFDocument = require('pdfkit');
const SVGtoPDF = require('svg-to-pdfkit');
const fs = require('fs');

PDFDocument.prototype.addSVG = function(svg, x, y, options) {
  return SVGtoPDF(this, svg, x, y, options), this;
};

const doc = new PDFDocument();
const data = fs.readFileSync('svg_content.svg', 'utf8');
const data2 = fs.readFileSync('text_content.txt', 'utf8');

doc.pipe(fs.createWriteStream('output.pdf'));

doc.registerFont('martel-devanagari', 'assets/fonts/martel-devanagari/Martel-Regular.ttf');

doc.addSVG(data, 0, 0);

doc
  .font('assets/fonts/martel-devanagari/Martel-Regular.ttf')
  .fontSize(25)
  .text(data2)
  .text('हैप्पी');

doc.end();

The content comes out like this:

Something is causing the content added using this library to be different, but I don't know what it is.

Any assistance pointing me in the right direction would be very much appreciated!