Easy Chaining ImageFilter with CoreImage
My App Fil is powered by LightRoom.
LightRoom is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod "LightRoom"
First, create FilterComponents.
Then create a FilterChain using them.
image1 >>> colorControl --* addition
blendImage >>> addition --* overlay
image2 >>> colorControl2 >>> overlay
You can connect FilterChains with each other using >>>
let colorControl = LightRoom.ColorAdjustment.ExposureAdjust(ev: 1)
let chain1 = FilterChain { (image: CIImage?) -> CIImage? in
image >>> colorControl
return colorControl.outputImage
}
let colorControl2 = LightRoom.ColorAdjustment.ColorControls(saturation: 0.3, brightness: 0, contrast: 1)
let chain2 = FilterChain { (image: CIImage?) -> CIImage? in
image >>> colorControl2
return colorControl2.outputImage
}
image1 >>> chain1 >>> chain2
chain2.outputImage
FilterComponent has a CIFilter, which is cached and will be created only once.
This structure is advantageous in performance, and is great for real-time filtering camera implementation.
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