Created
October 13, 2017 22:41
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CoreMLHelpers
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extension UIImage { | |
func resizeTo(size: CGSize) -> UIImage { | |
UIGraphicsBeginImageContextWithOptions(size, true, 0.0) | |
self.draw(in: CGRect(origin: CGPoint.zero, size: size)) | |
let renderedImage = UIGraphicsGetImageFromCurrentImageContext() | |
UIGraphicsEndImageContext() | |
return renderedImage! | |
} | |
func buffer() -> CVPixelBuffer? { | |
let attrs = [kCVPixelBufferCGImageCompatibilityKey: kCFBooleanTrue, kCVPixelBufferCGBitmapContextCompatibilityKey: kCFBooleanTrue] as CFDictionary | |
var pixelBuffer : CVPixelBuffer? | |
let status = CVPixelBufferCreate(kCFAllocatorDefault, Int(self.size.width), Int(self.size.height), kCVPixelFormatType_32ARGB, attrs, &pixelBuffer) | |
guard (status == kCVReturnSuccess) else { | |
return nil | |
} | |
CVPixelBufferLockBaseAddress(pixelBuffer!, CVPixelBufferLockFlags(rawValue: 0)) | |
let pixelData = CVPixelBufferGetBaseAddress(pixelBuffer!) | |
let rgbColorSpace = CGColorSpaceCreateDeviceRGB() | |
let context = CGContext(data: pixelData, width: Int(self.size.width), height: Int(self.size.height), bitsPerComponent: 8, bytesPerRow: CVPixelBufferGetBytesPerRow(pixelBuffer!), space: rgbColorSpace, bitmapInfo: CGImageAlphaInfo.noneSkipFirst.rawValue) | |
context?.translateBy(x: 0, y: self.size.height) | |
context?.scaleBy(x: 1.0, y: -1.0) | |
UIGraphicsPushContext(context!) | |
self.draw(in: CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)) | |
UIGraphicsPopContext() | |
CVPixelBufferUnlockBaseAddress(pixelBuffer!, CVPixelBufferLockFlags(rawValue: 0)) | |
return pixelBuffer | |
} | |
} |
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