Adding blur to an NSImage using Swift

Question

I'm searching for a way to add a blur effect to a NSImage using Swift.

developing for iOS, UIImage provides a method like

applyLightEffectAtFrame:frame

... but i could not find something equal for Cocoa/an OSX-App.

edit 1: i tried to use CIFilter:

let beginImage = CIImage(data: responseData)
let filter = CIFilter(name: "CIGaussianBlur")
filter.setValue(beginImage, forKey: kCIInputImageKey)
filter.setValue(0.5, forKey: kCIInputIntensityKey)
// HOW CAN I MAKE AN NSIMAGE OUT OF THE CIIMAGE?
let newImage = ???
imageView.image = newImage

Core Image filters are the general equivalent to a lot of the image effects you can find on iOS. — CodaFi, Oct 11 '14 at 00:35
edited my question above; i tried to use the CIFilter thinking i'm on a good way, but couldn't find out how i can convert the CIImage back to NSImage? — ixany, Oct 11 '14 at 12:41
It's a simple enough process using image reps. See: http://stackoverflow.com/questions/17386650/converting-ciimage-into-nsimage — CodaFi, Oct 11 '14 at 21:50

score 2 · Accepted Answer · answered Oct 15 '14 at 12:05

2

I solved this issue by just adding a content filter to my NSImageView within the Interface-Builder.

answered Oct 15 '14 at 12:05

ixany

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Could you please elaborate? I don't see a "content filter" option in IB. – de. Sep 18 '21 at 11:16
Ok found it – last tab in the inspector menu "fx" – de. Sep 18 '21 at 11:21

score 2 · Answer 2 · answered Apr 22 '15 at 14:04

The following (taken from here) works for me

    var originalImage = NSImage(named: "myImageName")
    var inputImage = CIImage(data: originalImage?.TIFFRepresentation)
    var filter = CIFilter(name: "CIGaussianBlur")
    filter.setDefaults()
    filter.setValue(inputImage, forKey: kCIInputImageKey)
    var outputImage = filter.valueForKey(kCIOutputImageKey) as CIImage
    var outputImageRect = NSRectFromCGRect(outputImage.extent())
    var blurredImage = NSImage(size: outputImageRect.size)
    blurredImage.lockFocus()
    outputImage.drawAtPoint(NSZeroPoint, fromRect: outputImageRect, operation: .CompositeCopy, fraction: 1.0)
    blurredImage.unlockFocus()

    imageView.image = blurredImage

Hope it helps the new comers

Adding blur to an NSImage using Swift

2 Answers2