Returns a new image created by multiplying the image’s RGB values by its alpha values.
- iOS 10.0+
- macOS 10.12+
- Mac Catalyst 13.0+
- tvOS 10.0+
- Core Image
An image object representing the result of the operation.
Premultiplied alpha speeds up the rendering of images, so Core Image filters require that input image data be premultiplied. If you have an image without premultiplied alpha that you want to feed into a filter, use this method before applying the filter.