An optional call to warm up a
CIContext so that subsequent calls to render with the same arguments run more efficiently.
- iOS 11.0+
- macOS 10.13+
- UIKit for Mac 13.0+Beta
- tvOS 11.0+
CGRect defining the region to render.
CGPoint at which you are preparing to render.
Pointer to an error should preparation to render fail.
true if preparation succeeded.
By making this call, the Core Image framework ensures that any needed kernels are compiled, and any intermediate buffers are allocated and marked volatile up front.
Customizing Render Destination
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.Learn more about using Apple's beta software