Update lottie-ios

submodules/lottie-ios/Sources/Public/macOS/FilepathImageProvider.macOS.swift

@@ -0,0 +1,69 @@
+//
+//  FilepathImageProvider.swift
+//  lottie-swift
+//
+//  Created by Brandon Withrow on 2/1/19.
+//
+
+#if os(macOS)
+import AppKit
+
+/// An `AnimationImageProvider` that provides images by name from a specific filepath.
+public class FilepathImageProvider: AnimationImageProvider {
+
+  // MARK: Lifecycle
+
+  /// Initializes an image provider with a specific filepath.
+  ///
+  /// - Parameter filepath: The absolute filepath containing the images.
+  ///
+  public init(filepath: String) {
+    self.filepath = URL(fileURLWithPath: filepath)
+  }
+
+  public init(filepath: URL) {
+    self.filepath = filepath
+  }
+
+  // MARK: Public
+
+  public func imageForAsset(asset: ImageAsset) -> CGImage? {
+
+    if
+      asset.name.hasPrefix("data:"),
+      let url = URL(string: asset.name),
+      let data = try? Data(contentsOf: url),
+      let image = NSImage(data: data)
+    {
+      return image.CGImage
+    }
+
+    let directPath = filepath.appendingPathComponent(asset.name).path
+    if FileManager.default.fileExists(atPath: directPath) {
+
+      return NSImage(contentsOfFile: directPath)?.CGImage
+    }
+
+    let pathWithDirectory = filepath.appendingPathComponent(asset.directory).appendingPathComponent(asset.name).path
+    if FileManager.default.fileExists(atPath: pathWithDirectory) {
+      return NSImage(contentsOfFile: pathWithDirectory)?.CGImage
+    }
+
+    LottieLogger.shared.assertionFailure("Could not find image \"\(asset.name)\" in bundle")
+    return nil
+  }
+
+  // MARK: Internal
+
+  let filepath: URL
+}
+
+extension NSImage {
+  @nonobjc
+  var CGImage: CGImage? {
+    guard let imageData = tiffRepresentation else { return nil }
+    guard let sourceData = CGImageSourceCreateWithData(imageData as CFData, nil) else { return nil }
+    return CGImageSourceCreateImageAtIndex(sourceData, 0, nil)
+  }
+}
+#endif