in src/scaleDetector.ts [44:58]
public getScale(): Point {
let scaledRect = this.scaleDetectorElement.getBoundingClientRect();
let domRect = this.scaleDetectorElement.getBBox();
if (domRect.height > 0 && domRect.width > 0) {
return {
x: scaledRect.width / domRect.width,
y: scaledRect.height / domRect.height
};
}
return {
x: 1,
y: 1
};
}