preferredDynamicRange

Specifies the preferred dynamic range behavior of the tone mapping. The value should be kCIDynamicRangeStandard, kCIDynamicRangeConstrainedHigh, kCIDynamicRangeHigh or nil. If nil then it will behave as kCIDynamicRangeHigh.

var preferredDynamicRange: CIDynamicRangeOption? { get set }