A quick QML app that renders an icon with the same shape that the Drawer does, then takes a screenshot of it.

gistfile1.txt

//Copyright 2021 Dalton Durst
//
//Permission is hereby granted, free of charge, to any person obtaining a copy
//of this software and associated documentation files (the "Software"), to deal
//in the Software without restriction, including without limitation the rights
//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//copies of the Software, and to permit persons to whom the Software is
//furnished to do so.
//
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//SOFTWARE.

import QtQuick 2.7
import Ubuntu.Components 1.3

MainView {
    id: root
    objectName: 'mainView'
    applicationName: 'icons.dalton'
    automaticOrientation: true

    width: units.gu(45)
    height: units.gu(75)

    Rectangle {
        anchors.fill: parent
        opacity: 0
    }

    Item {
        id: rendering
        anchors.fill: parent

        UbuntuShape {
            opacity: 1
            id : icon
            width: units.gu(64)
            height: units.gu(64)
            relativeRadius: 0.3625
            source: Image {
                sourceSize.width: icon.width
                source: "file:///usr/share/address-book-app/artwork/address-book-app.svg"
            }
        }
    }

    Timer {
        interval: 1000
        onTriggered: icon.grabToImage(function(result) {
            result.saveToFile("/home/phablet/Pictures/wow.png");
        })
        running: true
    }
}