Static kCIContextWorkingFormat 

pub unsafe static kCIContextWorkingFormat: &'static CIContextOption

Available on crate feature CIContext only.

A Core Image context option key to specify the pixel format to for intermediate results when rendering.

The value for this key is an NSNumber instance containing a CIFormat value.

The supported values for the working pixel format are: CIFormat | Notes —————–– | ––––––– kCIFormatRGBA8 | Uses less memory but has less precision an range kCIFormatRGBAh | Uses 8 bytes per pixel, supports HDR kCIFormatRGBAf | Only on macOS

If this option is not specified, then the default is kCIFormatRGBAh.

(The default is kCIFormatRGBA8 if your if app is linked against iOS 12 SDK or earlier.)

See also Apple’s documentation