ImageSizeInfo constructor
Creates an object to track the backing size of a dart:ui.Image compared to its display size on a Canvas.
This class is used by the framework when it paints an image to a canvas
to report to dart:developer
's postEvent, as well as to the
debugOnPaintImage callback if it is set.
Implementation
const ImageSizeInfo({this.source, required this.displaySize, required this.imageSize});