Create an incremental image source.
- iOS 4.0+
- macOS 10.4+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
- Image I/O
A dictionary that specifies additional creation options. See Image Source Option Dictionary Keys for the keys you can supply.
Returns an image source object. You are responsible for releasing this object using
CGImage creates an empty image source container to which you can add data later by calling the functions
CGImage. You don’t provide data when you call this function.
An incremental image is an image that is created in chunks, similar to the way large images viewed over the web are loaded piece by piece.