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Merge pull request #23 from KyoheiG3/swift-4
Support Swift 4
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| // | ||
| // BlurLayer.swift | ||
| // DynamicBlurView | ||
| // | ||
| // Created by Kyohei Ito on 2017/08/14. | ||
| // Copyright © 2017年 kyohei_ito. All rights reserved. | ||
| // | ||
|
|
||
| import UIKit | ||
|
|
||
| private extension CGRect { | ||
| func rectangle(_ s: CGSize) -> CGRect { | ||
| let x = origin.x / s.width | ||
| let y = origin.y / s.height | ||
| let width = size.width / s.width | ||
| let height = size.height / s.height | ||
| return CGRect(x: x, y: y, width: width, height: height) | ||
| } | ||
| } | ||
|
|
||
| class BlurLayer: CALayer { | ||
| private static let blurRadiusKey = "blurRadius" | ||
| private static let blurLayoutKey = "blurLayout" | ||
| @NSManaged var blurRadius: CGFloat | ||
| @NSManaged private var blurLayout: CGFloat | ||
|
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| private var fromBlurRadius: CGFloat? | ||
| var presentationRadius: CGFloat { | ||
| if let radius = fromBlurRadius { | ||
| if let layer = presentation() { | ||
| return layer.blurRadius | ||
| } else { | ||
| return radius | ||
| } | ||
| } else { | ||
| return blurRadius | ||
| } | ||
| } | ||
|
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||
| override class func needsDisplay(forKey key: String) -> Bool { | ||
| if key == blurRadiusKey || key == blurLayoutKey { | ||
| return true | ||
| } | ||
| return super.needsDisplay(forKey: key) | ||
| } | ||
|
|
||
| open override func action(forKey event: String) -> CAAction? { | ||
| if event == BlurLayer.blurRadiusKey { | ||
| fromBlurRadius = nil | ||
|
|
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| if let action = super.action(forKey: "opacity") as? CABasicAnimation { | ||
| fromBlurRadius = (presentation() ?? self).blurRadius | ||
|
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| action.keyPath = event | ||
| action.fromValue = fromBlurRadius | ||
| return action | ||
| } | ||
| } | ||
|
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| if event == BlurLayer.blurLayoutKey, let action = super.action(forKey: "opacity") as? CABasicAnimation { | ||
| action.keyPath = event | ||
| action.fromValue = 0 | ||
| action.toValue = 1 | ||
| return action | ||
| } | ||
|
|
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| return super.action(forKey: event) | ||
| } | ||
| } | ||
|
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| extension BlurLayer { | ||
| func draw(_ image: UIImage, fixes isFixes: Bool, baseLayer: CALayer?) { | ||
| contents = image.cgImage | ||
| contentsScale = image.scale | ||
|
|
||
| if isFixes, let blurLayer = presentation() { | ||
| contentsRect = blurLayer.convert(blurLayer.bounds, to: baseLayer).rectangle(image.size) | ||
| } | ||
| } | ||
|
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||
| func refresh() { | ||
| fromBlurRadius = nil | ||
| } | ||
|
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| func animate() { | ||
| UIView.performWithoutAnimation { | ||
| blurLayout = 0 | ||
| } | ||
| blurLayout = 1 | ||
| } | ||
|
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||
| func render(in context: CGContext, for layer: CALayer) { | ||
| let layers = hideOverlappingLayers(layer.sublayers) | ||
| layer.render(in: context) | ||
| layers.forEach { | ||
| $0.isHidden = false | ||
| } | ||
| } | ||
|
|
||
| private func hideOverlappingLayers(_ layers: [CALayer]?) -> [CALayer] { | ||
| var hiddenLayers: [CALayer] = [] | ||
| guard let layers = layers else { | ||
| return hiddenLayers | ||
| } | ||
|
|
||
| for layer in layers.reversed() { | ||
| if isHang(to: layer) { | ||
| return hiddenLayers + hideOverlappingLayers(layer.sublayers) | ||
| } | ||
| if layer.isHidden == false { | ||
| layer.isHidden = true | ||
| hiddenLayers.append(layer) | ||
| } | ||
| if layer == self { | ||
| return hiddenLayers | ||
| } | ||
| } | ||
| return hiddenLayers | ||
| } | ||
|
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| private func isHang(to target: CALayer) -> Bool { | ||
| var layer = superlayer | ||
| while layer != nil { | ||
| if layer == target { | ||
| return true | ||
| } | ||
| layer = layer?.superlayer | ||
| } | ||
| return false | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| // | ||
| // CGContext+CGImage.swift | ||
| // DynamicBlurView | ||
| // | ||
| // Created by Kyohei Ito on 2017/08/17. | ||
| // Copyright © 2017年 kyohei_ito. All rights reserved. | ||
| // | ||
|
|
||
| extension CGContext { | ||
| static func imageContext(with quality: CaptureQuality, rect: CGRect, opaque: Bool) -> CGContext? { | ||
| UIGraphicsBeginImageContextWithOptions(rect.size, opaque, quality.imageScale) | ||
| guard let context = UIGraphicsGetCurrentContext() else { | ||
| return nil | ||
| } | ||
|
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||
| context.translateBy(x: -rect.origin.x, y: -rect.origin.y) | ||
| context.interpolationQuality = quality.interpolationQuality | ||
|
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| return context | ||
| } | ||
|
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| func makeImage(with blendColor: UIColor?, blendMode: CGBlendMode, size: CGSize) -> CGImage? { | ||
| if let color = blendColor { | ||
| setFillColor(color.cgColor) | ||
| setBlendMode(blendMode) | ||
| fill(CGRect(origin: .zero, size: size)) | ||
| } | ||
|
|
||
| return makeImage() | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| // | ||
| // CGImage+Accelerate.swift | ||
| // DynamicBlurView | ||
| // | ||
| // Created by Kyohei Ito on 2017/08/17. | ||
| // Copyright © 2017年 kyohei_ito. All rights reserved. | ||
| // | ||
|
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| import Accelerate | ||
|
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| extension CGImage { | ||
| var area: Int { | ||
| return width * height | ||
| } | ||
|
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| private var size: CGSize { | ||
| return CGSize(width: width, height: height) | ||
| } | ||
|
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| private var bytes: Int { | ||
| return bytesPerRow * height | ||
| } | ||
|
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| private func imageBuffer(from data: UnsafeMutableRawPointer!) -> vImage_Buffer { | ||
| return vImage_Buffer(data: data, height: vImagePixelCount(height), width: vImagePixelCount(width), rowBytes: bytesPerRow) | ||
| } | ||
|
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| func blurred(with boxSize: UInt32, iterations: Int, blendColor: UIColor?, blendMode: CGBlendMode) -> CGImage? { | ||
| guard let provider = dataProvider else { | ||
| return nil | ||
| } | ||
|
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| let inData = malloc(bytes) | ||
| var inBuffer = imageBuffer(from: inData) | ||
|
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| let outData = malloc(bytes) | ||
| var outBuffer = imageBuffer(from: outData) | ||
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| let tempSize = vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer, nil, 0, 0, boxSize, boxSize, nil, vImage_Flags(kvImageEdgeExtend + kvImageGetTempBufferSize)) | ||
| let tempData = malloc(tempSize) | ||
|
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| defer { | ||
| free(inData) | ||
| free(outData) | ||
| free(tempData) | ||
| } | ||
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| let source = CFDataGetBytePtr(provider.data) | ||
| memcpy(inBuffer.data, source, bytes) | ||
|
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| for _ in 0..<iterations { | ||
| vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer, tempData, 0, 0, boxSize, boxSize, nil, vImage_Flags(kvImageEdgeExtend)) | ||
|
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| let temp = inBuffer.data | ||
| inBuffer.data = outBuffer.data | ||
| outBuffer.data = temp | ||
| } | ||
|
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| let context = colorSpace.flatMap { | ||
| CGContext(data: inBuffer.data, width: width, height: height, bitsPerComponent: bitsPerComponent, bytesPerRow: bytesPerRow, space: $0, bitmapInfo: bitmapInfo.rawValue) | ||
| } | ||
|
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| return context?.makeImage(with: blendColor, blendMode: blendMode, size: size) | ||
| } | ||
| } |
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