fonttools: try to draw emoji image with windows seguiemj.ttf font failed

I am trying to extract high resolution windows color emoji image from seguiemj.ttf .

What I have already know:

• the font stores emoji in svg format (layered vector drawings in COLR/CPAL)
• the font also has a glyph table

My roadmap: use fonttools load seguiemj.ttf --> use fonttools draw high resolution png image --> save to file

for example, I am trying to try 😀 with glyph name u1F600:

#! /usr/bin/env python
# -*- coding: utf-8 -*-

if __name__=="__main__":
    import sys
    from fontTools.ttLib import TTFont
    from reportlab.lib import colors
    from fontTools.pens.reportLabPen import ReportLabPen, Path


    glyphName = 'u1F600'
    imageFile = "%s.png" % glyphName

    font = TTFont('seguiemj.ttf')
    gs = font.getGlyphSet()
    pen = ReportLabPen(gs, Path(fillColor=colors.red, strokeWidth=5))
    g = gs[glyphName]
    g.draw(pen)

    w, h = g.width, 1000
    from reportlab.graphics import renderPM
    from reportlab.graphics.shapes import Group, Drawing, scale

    # Everything is wrapped in a group to allow transformations.
    g = Group(pen.path)
    g.translate(0, 200)
    g.scale(0.3, 0.3)

    d = Drawing(w, h)
    d.add(g)

    renderPM.drawToFile(d, imageFile, fmt="PNG")

I only get image with emji ontline filled with red color.

What I have missed? Or am I totally on the wrong direction?