Skip to content

Instantly share code, notes, and snippets.

@manikal
Last active October 27, 2015 11:39
Show Gist options
  • Save manikal/00b54787701e389e648d to your computer and use it in GitHub Desktop.
Save manikal/00b54787701e389e648d to your computer and use it in GitHub Desktop.
CIImage from CAShapeLayer
override func layoutSubviews()
{
if(self.shapeLayer == nil && self.path != nil && self.pathOriginationSize != CGSizeZero)
{
let scaleFactor = self.scaleFactor(self.pathOriginationSize, targetSize: self.bounds.size)
_scaledPath = UIBezierPath(CGPath: self.path.CGPath)
_scaledPath.lineWidth = self.path.lineWidth
_scaledPath.applyTransform(CGAffineTransformMakeScale(scaleFactor.x, scaleFactor.y))
_scaledPath.lineCapStyle = CGLineCap.Round
self.shapeLayer = CAShapeLayer()
self.shapeLayer.path = _scaledPath.CGPath
self.shapeLayer.strokeColor = UIColor.blackColor().CGColor
self.shapeLayer.lineWidth = self.path.lineWidth
let imageSize = CGPathGetBoundingBox(_scaledPath.CGPath).size
UIGraphicsBeginImageContextWithOptions(imageSize, false, UIScreen.mainScreen().scale)
let context = UIGraphicsGetCurrentContext()
self.shapeLayer.renderInContext(context!)
_ = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
let cgImage = self.shapeLayer.contents as! CGImageRef
let inputImage = CIImage(CGImage: cgImage)
let blurFilter = CIFilter(name: "CIZoomBlur")
blurFilter?.setValue(inputImage, forKey: kCIInputImageKey)
blurFilter?.setDefaults()
self.shapeLayer.filters = [blurFilter!]
self.shapeLayer.shouldRasterize = true
self.layer.addSublayer(self.shapeLayer)
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment