text: // Copyright 2013 The Flutter Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef SHELL_PLATFORM_IOS_FRAMEWORK_SOURCE_FLUTTER_OVERLAY_VIEW_H_
  #define SHELL_PLATFORM_IOS_FRAMEWORK_SOURCE_FLUTTER_OVERLAY_VIEW_H_
  
  #include <UIKit/UIKit.h>
  
  #include <memory>
  
  #include "flutter/fml/memory/weak_ptr.h"
  #include "flutter/shell/common/shell.h"
  #import "flutter/shell/platform/darwin/ios/ios_context_gl.h"
  #import "flutter/shell/platform/darwin/ios/ios_surface.h"
  #import "flutter/shell/platform/darwin/ios/ios_surface_gl.h"
  
  #import "flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.h"
  
  /// UIViews that are used by |FlutterPlatformViews| to present Flutter
  /// rendering on top of system compositor rendering (ex. a web view).
  ///
  /// When there is a view composited by the system compositor within a Flutter
  /// view hierarchy, instead of rendering into a single render target, Flutter
  /// renders into multiple render targets (depending on the number of
  /// interleaving levels between Flutter & non-Flutter contents). While the
  /// FlutterView contains the backing store for the root render target, the
  /// FlutterOverlay view contains the backing stores for the rest. The overlay
  /// views also handle touch propagation and the like for touches that occurs
  /// either on overlays or otherwise may be intercepted by the platform views.
  @interface FlutterOverlayView : UIView
  
  - (instancetype)initWithFrame:(CGRect)frame NS_UNAVAILABLE;
  - (instancetype)initWithCoder:(NSCoder*)aDecoder NS_UNAVAILABLE;
  
  - (instancetype)init NS_DESIGNATED_INITIALIZER;
  - (instancetype)initWithContentsScale:(CGFloat)contentsScale;
  
  @end
  
  #endif  // SHELL_PLATFORM_IOS_FRAMEWORK_SOURCE_FLUTTER_OVERLAY_VIEW_H_
  