I'm writing a code.
Here is my full source code.
I confirmed that my code runs successfully in Xcode 8.3.3.
However, my code crashed in Xcode 9.x (9.1 and 9.2).
Exactly, my code crashed in "filter.setValue(inputCIImage, forKey: kCIInputImageKey)" with "NSException (sig abrt)"
I did not find the cause even though I used the debugger.
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import UIKit
class ViewController: UIViewController {
@IBOutlet weak var imageView: UIImageView!
let inputImage = UIImage(named: "testImage.png")
override func viewDidLoad() {
super.viewDidLoad()
let inputCIImage = CIImage(image: inputImage!)
let filter = CustomFilter()
filter.setValue(inputCIImage, forKey: kCIInputImageKey)
let outputImage = filter.outputImage!
let context = CIContext()
let outputCGImage = context.createCGImage(outputImage, from: outputImage.extent)
imageView.image = UIImage(cgImage: outputCGImage!)
}
}
class CustomFilter: CIFilter {
var inputImage: CIImage?
override public var outputImage: CIImage! {
get {
if let inputImage = self.inputImage {
let args = [inputImage as AnyObject]
return createCustomKernel().apply(extent: inputImage.extent, arguments: args)
} else {
return nil
}
}
}
func createCustomKernel() -> CIColorKernel {
let kernelString =
"kernel vec4 chromaKey(__sample s){\n" +
"vec4 newPixel = s.rgba;\n" +
"newPixel[0] = 0.0;\n" +
"newPixel[2] = newPixel[2] / 2.0;\n" +
"return newPixel;\n" + "}"
return CIColorKernel(source: kernelString)!
}
}
