wxlpp / CoreImageHelpers

Syntactic sugar for displaying CIImage using OpenGL and grabbing CIImages from iOS cameras

CoreImageHelpers

Syntactic sugar for displaying CIImage using OpenGL and grabbing CIImages from iOS cameras

Introduction

CoreImageHelpers contains two classes to wrap up all the boilerplate code required for:

• ImageView for displaying CIImage instances with OpenGL and skipping the extra UIImage step
• CameraCaptureHelper for grabbing a series of CIImage instances from either the front or back camera.

Implementation

The project contains a demonstration that applies a Crystallize filter to the camera feed and displays full screen. The code is super simple:

class ViewController: UIViewController, CameraCaptureHelperDelegate
{
    let imageView = ImageView()

    let cameraCaptureHelper = CameraCaptureHelper(cameraPosition: .Front)
    
    let crystallize = CIFilter(name: "CICrystallize",
        withInputParameters: [kCIInputRadiusKey: 30])!
    
    override func viewDidLoad()
    {
        super.viewDidLoad()
     
        view.addSubview(imageView)

        cameraCaptureHelper.delegate = self
    }
    
    override func viewDidLayoutSubviews()
    {
        imageView.frame = view.bounds.insetBy(dx: 50, dy: 50)
    }

    
    func newCameraImage(cameraCaptureHelper: CameraCaptureHelper, image: CIImage)
    {
        crystallize.setValue(image, forKey: kCIInputImageKey)
        
        imageView.image = crystallize.outputImage
    }
}

Installation

Simply copy one or both of ImageView and CameraCaptureHelper

Further Information

This project is a companion to my upcoming book, Core Image for Swift, follow me on Twitter where I am @FlexMonkey to keep up to date with developments!