7.0s - Replaced by Image Conversion library - no direct equivalent

This class has been deprecated in 7.0s.

An interface to a set of image conversion utility callback functions.

The class is a mixin and is intended to be inherited by the client classes which observe the image conversion operations. The functions encapsulated by this class are called when the open, create and conversion operations complete.The interface is also used by the bitmap image rotator and the bitmap image re-scaler. A reference to this object is passed as a parameter when constructing image conversion utility, image rotator and image re-scaler objects.