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.
  
  #include "flutter/lib/ui/dart_ui.h"
  
  #include "flutter/fml/build_config.h"
  #include "flutter/lib/ui/compositing/scene.h"
  #include "flutter/lib/ui/compositing/scene_builder.h"
  #include "flutter/lib/ui/dart_runtime_hooks.h"
  #include "flutter/lib/ui/isolate_name_server/isolate_name_server_natives.h"
  #include "flutter/lib/ui/painting/canvas.h"
  #include "flutter/lib/ui/painting/codec.h"
  #include "flutter/lib/ui/painting/color_filter.h"
  #include "flutter/lib/ui/painting/engine_layer.h"
  #include "flutter/lib/ui/painting/gradient.h"
  #include "flutter/lib/ui/painting/image.h"
  #include "flutter/lib/ui/painting/image_descriptor.h"
  #include "flutter/lib/ui/painting/image_filter.h"
  #include "flutter/lib/ui/painting/image_shader.h"
  #include "flutter/lib/ui/painting/immutable_buffer.h"
  #include "flutter/lib/ui/painting/path.h"
  #include "flutter/lib/ui/painting/path_measure.h"
  #include "flutter/lib/ui/painting/picture.h"
  #include "flutter/lib/ui/painting/picture_recorder.h"
  #include "flutter/lib/ui/painting/vertices.h"
  #include "flutter/lib/ui/semantics/semantics_update.h"
  #include "flutter/lib/ui/semantics/semantics_update_builder.h"
  #include "flutter/lib/ui/semantics/string_attribute.h"
  #include "flutter/lib/ui/text/font_collection.h"
  #include "flutter/lib/ui/text/paragraph.h"
  #include "flutter/lib/ui/text/paragraph_builder.h"
  #include "flutter/lib/ui/window/platform_configuration.h"
  #include "third_party/tonic/converter/dart_converter.h"
  #include "third_party/tonic/logging/dart_error.h"
  
  using tonic::ToDart;
  
  namespace flutter {
  namespace {
  
  static tonic::DartLibraryNatives* g_natives;
  
  Dart_NativeFunction GetNativeFunction(Dart_Handle name,
                                        int argument_count,
                                        bool* auto_setup_scope) {
    return g_natives->GetNativeFunction(name, argument_count, auto_setup_scope);
  }
  
  const uint8_t* GetSymbol(Dart_NativeFunction native_function) {
    return g_natives->GetSymbol(native_function);
  }
  
  }  // namespace
  
  void DartUI::InitForGlobal() {
    if (!g_natives) {
      g_natives = new tonic::DartLibraryNatives();
      Canvas::RegisterNatives(g_natives);
      CanvasGradient::RegisterNatives(g_natives);
      CanvasImage::RegisterNatives(g_natives);
      CanvasPath::RegisterNatives(g_natives);
      CanvasPathMeasure::RegisterNatives(g_natives);
      Codec::RegisterNatives(g_natives);
      ColorFilter::RegisterNatives(g_natives);
      DartRuntimeHooks::RegisterNatives(g_natives);
      EngineLayer::RegisterNatives(g_natives);
      FontCollection::RegisterNatives(g_natives);
      ImageDescriptor::RegisterNatives(g_natives);
      ImageFilter::RegisterNatives(g_natives);
      ImageShader::RegisterNatives(g_natives);
      ImmutableBuffer::RegisterNatives(g_natives);
      IsolateNameServerNatives::RegisterNatives(g_natives);
      NativeStringAttribute::RegisterNatives(g_natives);
      Paragraph::RegisterNatives(g_natives);
      ParagraphBuilder::RegisterNatives(g_natives);
      Picture::RegisterNatives(g_natives);
      PictureRecorder::RegisterNatives(g_natives);
      Scene::RegisterNatives(g_natives);
      SceneBuilder::RegisterNatives(g_natives);
      SemanticsUpdate::RegisterNatives(g_natives);
      SemanticsUpdateBuilder::RegisterNatives(g_natives);
      Vertices::RegisterNatives(g_natives);
      PlatformConfiguration::RegisterNatives(g_natives);
    }
  }
  
  void DartUI::InitForIsolate() {
    FML_DCHECK(g_natives);
    Dart_Handle result = Dart_SetNativeResolver(
        Dart_LookupLibrary(ToDart("dart:ui")), GetNativeFunction, GetSymbol);
    if (Dart_IsError(result)) {
      Dart_PropagateError(result);
    }
  }
  
  }  // namespace flutter
  