adamgraham

/// An extension to provide conversion to and from HSL (hue, saturation, lightness) colors.
extension UIColor {

    /// The HSL (hue, saturation, lightness) components of a color.
    struct HSL: Hashable {

        /// The hue component of the color, in the range [0, 360°].
        var hue: CGFloat
        /// The saturation component of the color, in the range [0, 100%].
        var saturation: CGFloat

shavit

/*
  Change the opacity of a CIFilter.
*/
func changeOpacity(to opacity: CGFloat, on filter: CIFilter, original image: UIImage) -> CIImage? {
  guard let backgroundImage: CIImage = CIImage(image: image) else { fatalError() }
  
  // The CIColorMatrix filter, will contain the requested filter and control its opacity
  guard let overlayFilter: CIFilter = CIFilter(name: "CIColorMatrix") else { fatalError() }
  let overlayRgba: [CGFloat] = [0, 0, 0, opacity]
  let alphaVector: CIVector = CIVector(values: overlayRgba, count: 4)

victusfate

Mark Essel10-Aug-2015 02:41 PM

Summary:
The issue specifically arises when a user has iCloud photo backup enabled, and attempts to export a substantial video to the photo library (the longer the video the longer the delay, exponentially slower)

https://gist.github.com/victusfate/8969a70e82c00ae448a7

Steps to Reproduce:
1. turn on icloud photo backup
2. run the attached code snippet in an app for a given videoURL

soffes

//
//  GPUImageTextureInput+CIImage.h
//  GPUImage
//
//  Created by Sam Soffes on 3/4/14.
//  Copyright (c) 2014 Sam Soffes. All rights reserved.
//

#import "GPUImageTextureInput.h"