CGImageSourceCopyAuxiliaryDataInfoAtIndex(_:_:_:)
Returns auxiliary data, such as mattes and depth information, that accompany the image.
Declaration
func CGImageSourceCopyAuxiliaryDataInfoAtIndex(_ isrc: CGImageSource, _ index: Int, _ auxiliaryImageDataType: CFString) -> CFDictionary?Parameters
- isrc:
The image source that contains the image data.
- index:
The zero-based index into the images of the image source. If the index is invalid, this method returns
NULL. - auxiliaryImageDataType:
The auxiliary data to retrieve. For a list of possible values, see Individual Image Properties and Individual Image Properties.
Return Value
A dictionary that contains the auxiliary data, or NULL if an error occurs.