ReactiveSwift + Metal
Image Processing with Metal API was inspired by BradLarson/GPUImage
Make strong references to these
let source = Camera()
let filter = LuminanceFilter() + RGBFilter(red: 0.1, green: 0.2, blue: 0.3) // Filter is
let target = RenderView()
filter <-- source target <-- filter
Installation via Carthage github "kananats/ReactiveMetal" "master"
Project > Targets > Build Settings > Metal Compiler - Build Options > Header Search Paths $(SRCROOT)/Carthage/Build/iOS/ReactiveMetal.framework/Headers