Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/ImageBlur/BUILD

@@ -0,0 +1,18 @@
+load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
+
+swift_library(
+    name = "ImageBlur",
+    module_name = "ImageBlur",
+    srcs = glob([
+		"Sources/**/*.swift",
+    ]),
+    copts = [
+        "-warnings-as-errors",
+    ],
+    deps = [
+	    "//submodules/FastBlur:FastBlur",
+    ],
+    visibility = [
+        "//visibility:public",
+    ],
+)

submodules/ImageBlur/Sources/ImageBlur.swift

@@ -0,0 +1,116 @@
+import UIKit
+import Accelerate
+
+private func imageBuffer(from data: UnsafeMutableRawPointer!, width: vImagePixelCount, height: vImagePixelCount, rowBytes: Int) -> vImage_Buffer {
+    return vImage_Buffer(data: data, height: vImagePixelCount(height), width: vImagePixelCount(width), rowBytes: rowBytes)
+}
+
+public func blurredImage(_ image: UIImage, radius: CGFloat, iterations: Int = 3) -> UIImage? {
+    guard let cgImage = image.cgImage, let providerData = cgImage.dataProvider?.data else {
+        return nil
+    }
+    
+    if image.size.width <= 0.0 || image.size.height <= 0 || radius <= 0 {
+        return image
+    }
+    
+    var boxSize = UInt32(radius)
+    if boxSize % 2 == 0 {
+        boxSize += 1
+    }
+    
+    let bytes = cgImage.bytesPerRow * cgImage.height
+    let inData = malloc(bytes)
+    var inBuffer = imageBuffer(from: inData, width: vImagePixelCount(cgImage.width), height: vImagePixelCount(cgImage.height), rowBytes: cgImage.bytesPerRow)
+    
+    let outData = malloc(bytes)
+    var outBuffer = imageBuffer(from: outData, width: vImagePixelCount(cgImage.width), height: vImagePixelCount(cgImage.height), rowBytes: cgImage.bytesPerRow)
+    
+    let tempSize = vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer, nil, 0, 0, boxSize, boxSize, nil, vImage_Flags(kvImageEdgeExtend + kvImageGetTempBufferSize))
+    let tempData = malloc(tempSize)
+    
+    defer {
+        free(inData)
+        free(outData)
+        free(tempData)
+    }
+    
+    
+    let source = CFDataGetBytePtr(providerData)
+    memcpy(inBuffer.data, source, bytes)
+    
+    
+    for _ in 0 ..< iterations {
+        vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer, tempData, 0, 0, boxSize, boxSize, nil, vImage_Flags(kvImageEdgeExtend))
+        
+        let temp = inBuffer.data
+        inBuffer.data = outBuffer.data
+        outBuffer.data = temp
+    }
+    
+    let context = cgImage.colorSpace.flatMap {
+        CGContext(data: inBuffer.data, width: cgImage.width, height: cgImage.height, bitsPerComponent: cgImage.bitsPerComponent, bytesPerRow: cgImage.bytesPerRow, space: $0, bitmapInfo: cgImage.bitmapInfo.rawValue)
+    }
+    
+    let blurredCGImage = context?.makeImage()
+    if let blurredCGImage = blurredCGImage {
+        return UIImage(cgImage: blurredCGImage, scale: image.scale, orientation: image.imageOrientation)
+    } else {
+        return nil
+    }
+}
+
+public func verticalBlurredImage(_ image: UIImage, radius: CGFloat, iterations: Int = 3) -> UIImage? {
+    guard let cgImage = image.cgImage, let providerData = cgImage.dataProvider?.data else {
+        return nil
+    }
+    
+    if image.size.width <= 0.0 || image.size.height <= 0 || radius <= 0 {
+        return image
+    }
+    
+    var boxSize = UInt32(radius)
+    if boxSize % 2 == 0 {
+        boxSize += 1
+    }
+    
+    let bytes = cgImage.bytesPerRow * cgImage.height
+    let inData = malloc(bytes)
+    var inBuffer = imageBuffer(from: inData, width: vImagePixelCount(cgImage.width), height: vImagePixelCount(cgImage.height), rowBytes: cgImage.bytesPerRow)
+    
+    let outData = malloc(bytes)
+    var outBuffer = imageBuffer(from: outData, width: vImagePixelCount(cgImage.width), height: vImagePixelCount(cgImage.height), rowBytes: cgImage.bytesPerRow)
+    
+    let tempSize = vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer, nil, 0, 0, boxSize, 1, nil, vImage_Flags(kvImageEdgeExtend + kvImageGetTempBufferSize))
+    let tempData = malloc(tempSize)
+    
+    defer {
+        free(inData)
+        free(outData)
+        free(tempData)
+    }
+    
+    
+    let source = CFDataGetBytePtr(providerData)
+    memcpy(inBuffer.data, source, bytes)
+    
+    
+    for _ in 0 ..< iterations {
+        vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer, tempData, 0, 0, boxSize, 1, nil, vImage_Flags(kvImageEdgeExtend))
+        
+        let temp = inBuffer.data
+        inBuffer.data = outBuffer.data
+        outBuffer.data = temp
+    }
+    
+    let context = cgImage.colorSpace.flatMap {
+        CGContext(data: inBuffer.data, width: cgImage.width, height: cgImage.height, bitsPerComponent: cgImage.bitsPerComponent, bytesPerRow: cgImage.bytesPerRow, space: $0, bitmapInfo: cgImage.bitmapInfo.rawValue)
+    }
+    
+    let blurredCGImage = context?.makeImage()
+    if let blurredCGImage = blurredCGImage {
+        return UIImage(cgImage: blurredCGImage, scale: image.scale, orientation: image.imageOrientation)
+    } else {
+        return nil
+    }
+}