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 FLUTTER_SHELL_PLATFORM_DARWIN_IOS_IOS_SURFACE_SOFTWARE_H_
  #define FLUTTER_SHELL_PLATFORM_DARWIN_IOS_IOS_SURFACE_SOFTWARE_H_
  
  #include "flutter/flow/embedded_views.h"
  #include "flutter/fml/macros.h"
  #include "flutter/fml/platform/darwin/scoped_nsobject.h"
  #include "flutter/shell/gpu/gpu_surface_software.h"
  #import "flutter/shell/platform/darwin/ios/ios_context.h"
  #import "flutter/shell/platform/darwin/ios/ios_surface.h"
  
  @class CALayer;
  
  namespace flutter {
  
  class IOSSurfaceSoftware final : public IOSSurface, public GPUSurfaceSoftwareDelegate {
   public:
    IOSSurfaceSoftware(fml::scoped_nsobject<CALayer> layer, std::shared_ptr<IOSContext> context);
  
    ~IOSSurfaceSoftware() override;
  
    // |IOSSurface|
    bool IsValid() const override;
  
    // |IOSSurface|
    void UpdateStorageSizeIfNecessary() override;
  
    // |IOSSurface|
    std::unique_ptr<Surface> CreateGPUSurface(GrDirectContext* gr_context = nullptr) override;
  
    // |GPUSurfaceSoftwareDelegate|
    sk_sp<SkSurface> AcquireBackingStore(const SkISize& size) override;
  
    // |GPUSurfaceSoftwareDelegate|
    bool PresentBackingStore(sk_sp<SkSurface> backing_store) override;
  
   private:
    fml::scoped_nsobject<CALayer> layer_;
    sk_sp<SkSurface> sk_surface_;
  
    FML_DISALLOW_COPY_AND_ASSIGN(IOSSurfaceSoftware);
  };
  
  }  // namespace flutter
  
  #endif  // FLUTTER_SHELL_PLATFORM_DARWIN_IOS_IOS_SURFACE_SOFTWARE_H_
  