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| guard let filter = CIFitler(name: "CIBlendWithMask") else { | |
| // Could not find the built-in filter | |
| return nil | |
| } | |
| let backgroundImage = CIImage(color: .clear).cropped(to: inputImage.extent) | |
| filter.setValue(backgroundImage, forKey: kCIInputBackgroundImageKey) | |
| filter.setValue(inputImage, forKey: kCIInputImageKey) | |
| filter.setValue(maskImage, forKey: kCIInputMaskImageKey) | |
| return filter.outputImage |
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