#OpenCL in Action
Matthew Scarpino's Book, OpenCL in Action: How to accelerate graphics and computation, is an excellent resource for learning OpenCL. Code is provided with the book and can be obtained from Manning Publications.
I am developing and learning OpenCL on the Mac platform, and so am reimplementing the code from each chapter utilising Xcodes built in frameworks to make host development easier.
Controlling OpenCL on the host became a lot easier with Interoperation with Grand Central Dispatch. Thus I am using as simplified development as possible while using Swift on the host
Inspired by the C++ OpenCL wrapper I also created a Swift wrapper to simplify development located at damienpontifex/SwiftOpenCL and have used that at later times with the Swift Package Manager.