kFxPropertyKey_ChangesOutputSize
A key that determines whether your filter has the ability to change the size of its output to be different than the size of its input.
Declaration
var kFxPropertyKey_ChangesOutputSize: String { get }Discussion
The value of this key is a Boolean NSNumber that indicates whether your filter returns an output that has a different size than the input. If not, return NO and your filter’s destinationImageRect(_:sourceImages:destinationImage:pluginState:at:) method will not be called.