| Flutter Windows Embedder |

Public Member Functions | Protected Member Functions | Friends | List of all members
flutter::FlutterWindowsEngine Class Reference

`#include <flutter_windows_engine.h>`

## Public Member Functions
| FlutterWindowsEngine (const FlutterProjectBundle &project, std::shared_ptr< WindowsProcTable > windows_proc_table=nullptr)
virtual | ~FlutterWindowsEngine ()
bool | Run ()
bool | Run (std::string_view entrypoint)
virtual bool | running () const
virtual bool | Stop ()
std::unique_ptr< FlutterWindowsView > | CreateView (std::unique_ptr< WindowBindingHandler > window)
virtual void | RemoveView (FlutterViewId view_id)
FlutterWindowsView * | view (FlutterViewId view_id) const
FlutterDesktopPluginRegistrarRef | GetRegistrar ()
void | AddPluginRegistrarDestructionCallback (FlutterDesktopOnPluginRegistrarDestroyed callback, FlutterDesktopPluginRegistrarRef registrar)
void | SetSwitches (const std::vector< std::string > &switches)
FlutterDesktopMessengerRef | messenger ()
IncomingMessageDispatcher * | message_dispatcher ()
TaskRunner * | task_runner ()
BinaryMessenger * | messenger_wrapper ()
FlutterWindowsTextureRegistrar * | texture_registrar ()
egl::Manager * | egl_manager () const
WindowProcDelegateManager * | window_proc_delegate_manager ()
void | SendWindowMetricsEvent (const FlutterWindowMetricsEvent &event)
void | SendPointerEvent (const FlutterPointerEvent &event)
void | SendKeyEvent (const FlutterKeyEvent &event, FlutterKeyEventCallback callback, void *user_data)
KeyboardHandlerBase * | keyboard_key_handler ()
TextInputPlugin * | text_input_plugin ()
bool | SendPlatformMessage (const char *channel, const uint8_t *message, const size_t message_size, const FlutterDesktopBinaryReply reply, void *user_data)
void | SendPlatformMessageResponse (const FlutterDesktopMessageResponseHandle *handle, const uint8_t *data, size_t data_length)
void | HandlePlatformMessage (const FlutterPlatformMessage *)
void | ReloadSystemFonts ()
void | ScheduleFrame ()
void | SetNextFrameCallback (fml::closure callback)
bool | RegisterExternalTexture (int64_t texture_id)
bool | UnregisterExternalTexture (int64_t texture_id)
bool | MarkExternalTextureFrameAvailable (int64_t texture_id)
virtual bool | PostRasterThreadTask (fml::closure callback) const
void | OnVsync (intptr_t baton)
bool | DispatchSemanticsAction (uint64_t id, FlutterSemanticsAction action, fml::MallocMapping data)
void | UpdateSemanticsEnabled (bool enabled)
bool | semantics_enabled () const
void | UpdateAccessibilityFeatures ()
void | UpdateHighContrastMode ()
bool | high_contrast_enabled () const
void | SetRootIsolateCreateCallback (const fml::closure &callback)
std::string | GetExecutableName () const
void | OnQuit (std::optional< HWND > hwnd, std::optional< WPARAM > wparam, std::optional< LPARAM > lparam, UINT exit_code)
void | RequestApplicationQuit (HWND hwnd, WPARAM wparam, LPARAM lparam, AppExitType exit_type)
void | OnDwmCompositionChanged ()
void | OnWindowStateEvent (HWND hwnd, WindowStateEvent event)
std::optional< LRESULT > | ProcessExternalWindowMessage (HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
WindowsLifecycleManager * | lifecycle_manager ()
std::shared_ptr< WindowsProcTable > | windows_proc_table ()

## Protected Member Functions
virtual std::unique_ptr< KeyboardHandlerBase > | CreateKeyboardKeyHandler (BinaryMessenger *messenger, KeyboardKeyEmbedderHandler::GetKeyStateHandler get_key_state, KeyboardKeyEmbedderHandler::MapVirtualKeyToScanCode map_vk_to_scan)
virtual std::unique_ptr< TextInputPlugin > | CreateTextInputPlugin (BinaryMessenger *messenger)
void | OnPreEngineRestart ()
virtual void | OnChannelUpdate (std::string name, bool listening)

## Friends
class | EngineModifier

## Detailed Description

Definition at line 90 of file flutter_windows_engine.h.

## Constructor & Destructor Documentation

## ◆ FlutterWindowsEngine()

flutter::FlutterWindowsEngine::FlutterWindowsEngine | ( | const FlutterProjectBundle & | project,
|  | std::shared_ptr< WindowsProcTable > | windows_proc_table = `nullptr`
| ) |  |

Definition at line 147 of file flutter_windows_engine.cc.

150 : project_(std::make_unique<FlutterProjectBundle>(project)),
151 windows_proc_table_(std::move(windows_proc_table)),
152 aot_data_(nullptr, nullptr),
153 views_mutex_(fml::SharedMutex::Create()),
154 lifecycle_manager_(std::make_unique<WindowsLifecycleManager>(this)) {
155 if (windows_proc_table_ == nullptr) {
156 windows_proc_table_ = std::make_shared<WindowsProcTable>();
157 }
158
159 gl_ = egl::ProcTable::Create();
160
161 embedder_api_.struct_size = sizeof(FlutterEngineProcTable);
162 FlutterEngineGetProcAddresses(&embedder_api_);
163
164 task_runner_ =
165 std::make_unique<TaskRunner>(
166 embedder_api_.GetCurrentTime, [this](const auto* task) {
167 if (!engine_) {
168 FML_LOG(ERROR)
169 << "Cannot post an engine task when engine is not running.";
170 return;
171 }
172 if (embedder_api_.RunTask(engine_, task) != kSuccess) {
173 FML_LOG(ERROR) << "Failed to post an engine task.";
174 }
175 });
176
177 // Set up the legacy structs backing the API handles.
178 messenger_ =
179 fml::RefPtr<FlutterDesktopMessenger>(new FlutterDesktopMessenger());
180 messenger_->SetEngine(this);
181 plugin_registrar_ = std::make_unique<FlutterDesktopPluginRegistrar>();
182 plugin_registrar_->engine = this;
183
184 messenger_wrapper_ =
185 std::make_unique<BinaryMessengerImpl>(messenger_->ToRef());
186 message_dispatcher_ =
187 std::make_unique<IncomingMessageDispatcher>(messenger_->ToRef());
188
189 texture_registrar_ =
190 std::make_unique<FlutterWindowsTextureRegistrar>(this, gl_);
191
192 // Check for impeller support.
193 auto& switches = project_->GetSwitches();
194 enable_impeller_ = std::find(switches.begin(), switches.end(),
195 "--enable-impeller=true") != switches.end();
196
197 egl_manager_ = egl::Manager::Create(enable_impeller_);
198 window_proc_delegate_manager_ = std::make_unique<WindowProcDelegateManager>();
199 window_proc_delegate_manager_->RegisterTopLevelWindowProcDelegate(
200 [](HWND hwnd, UINT msg, WPARAM wpar, LPARAM lpar, void* user_data,
201 LRESULT* result) {
202 BASE_DCHECK(user_data);
203 FlutterWindowsEngine* that =
204 static_cast<FlutterWindowsEngine*>(user_data);
205 BASE_DCHECK(that->lifecycle_manager_);
206 return that->lifecycle_manager_->WindowProc(hwnd, msg, wpar, lpar,
207 result);
208 },
209 static_cast<void*>(this));
210
211 // Set up internal channels.
212 // TODO: Replace this with an embedder.h API. See
213 // https://github.com/flutter/flutter/issues/71099
214 internal_plugin_registrar_ =
215 std::make_unique<PluginRegistrar>(plugin_registrar_.get());
216
217 accessibility_plugin_ = std::make_unique<AccessibilityPlugin>(this);
218 AccessibilityPlugin::SetUp(messenger_wrapper_.get(),
219 accessibility_plugin_.get());
220
221 cursor_handler_ =
222 std::make_unique<CursorHandler>(messenger_wrapper_.get(), this);
223 platform_handler_ =
224 std::make_unique<PlatformHandler>(messenger_wrapper_.get(), this);
225 settings_plugin_ = std::make_unique<SettingsPlugin>(messenger_wrapper_.get(),
226 task_runner_.get());
227 }

References flutter::egl::ProcTable::Create().

## ◆ ~FlutterWindowsEngine()

flutter::FlutterWindowsEngine::~FlutterWindowsEngine | ( |  | ) |
| virtual

Definition at line 229 of file flutter_windows_engine.cc.

229 {
230 messenger_->SetEngine(nullptr);
231 Stop();
232 }

## Member Function Documentation

## ◆ AddPluginRegistrarDestructionCallback()

void flutter::FlutterWindowsEngine::AddPluginRegistrarDestructionCallback | ( | FlutterDesktopOnPluginRegistrarDestroyed | callback,
|  | FlutterDesktopPluginRegistrarRef | registrar
| ) |  |

Definition at line 672 of file flutter_windows_engine.cc.

674 {
675 plugin_registrar_destruction_callbacks_[callback] = registrar;
676 }

References callback.

Referenced by FlutterDesktopPluginRegistrarSetDestructionHandler().

## ◆ CreateKeyboardKeyHandler()

std::unique_ptr< KeyboardHandlerBase > flutter::FlutterWindowsEngine::CreateKeyboardKeyHandler | ( | BinaryMessenger * | messenger,
|  | KeyboardKeyEmbedderHandler::GetKeyStateHandler | get_key_state,
|  | KeyboardKeyEmbedderHandler::MapVirtualKeyToScanCode | map_vk_to_scan
| ) |  |
| protected virtual

Definition at line 817 of file flutter_windows_engine.cc.

820 {
821 auto keyboard_key_handler = std::make_unique<KeyboardKeyHandler>(messenger);
822 keyboard_key_handler->AddDelegate(
823 std::make_unique<KeyboardKeyEmbedderHandler>(
824 [this](const FlutterKeyEvent& event, FlutterKeyEventCallback callback,
825 void* user_data) {
826 return SendKeyEvent(event, callback, user_data);
827 },
828 get_key_state, map_vk_to_scan));
829 keyboard_key_handler->AddDelegate(
830 std::make_unique<KeyboardKeyChannelHandler>(messenger));
831 keyboard_key_handler->InitKeyboardChannel();
832 return keyboard_key_handler;
833 }

References callback, and user_data.

## ◆ CreateTextInputPlugin()

std::unique_ptr< TextInputPlugin > flutter::FlutterWindowsEngine::CreateTextInputPlugin | ( | BinaryMessenger * | messenger | ) |
| protected virtual

Definition at line 835 of file flutter_windows_engine.cc.

836 {
837 return std::make_unique<TextInputPlugin>(messenger, this);
838 }

## ◆ CreateView()

std::unique_ptr< FlutterWindowsView > flutter::FlutterWindowsEngine::CreateView | ( | std::unique_ptr< WindowBindingHandler > | window | ) |

Definition at line 495 of file flutter_windows_engine.cc.

496 {
497 auto view_id = next_view_id_;
498 auto view = std::make_unique<FlutterWindowsView>(
499 view_id, this, std::move(window), windows_proc_table_);
500
501 view->CreateRenderSurface();
502
503 next_view_id_++;
504
505 {
506 // Add the view to the embedder. This must happen before the engine
507 // is notified the view exists and starts presenting to it.
508 fml::UniqueLock write_lock{*views_mutex_};
509 FML_DCHECK(views_.find(view_id) == views_.end());
510 views_[view_id] = view.get();
511 }
512
513 if (!view->IsImplicitView()) {
514 FML_DCHECK(running());
515
516 struct Captures {
517 fml::AutoResetWaitableEvent latch;
518 bool added;
519 };
520 Captures captures = {};
521
522 FlutterWindowMetricsEvent metrics = view->CreateWindowMetricsEvent();
523
524 FlutterAddViewInfo info = {};
525 info.struct_size = sizeof(FlutterAddViewInfo);
526 info.view_id = view_id;
527 info.view_metrics = &metrics;
528 info.user_data = &captures;
529 info.add_view_callback = [](const FlutterAddViewResult* result) {
530 Captures* captures = reinterpret_cast<Captures*>(result->user_data);
531 captures->added = result->added;
532 captures->latch.Signal();
533 };
534
535 FlutterEngineResult result = embedder_api_.AddView(engine_, &info);
536 if (result != kSuccess) {
537 FML_LOG(ERROR)
538 << "Starting the add view operation failed. FlutterEngineAddView "
539 "returned an unexpected result: "
540 << result << ". This indicates a bug in the Windows embedder.";
541 FML_DCHECK(false);
542 return nullptr;
543 }
544
545 // Block the platform thread until the engine has added the view.
546 // TODO(loicsharma): This blocks the platform thread eagerly and can
547 // cause unnecessary delay in input processing. Instead, this should block
548 // lazily only when the app does an operation which needs the view.
549 // https://github.com/flutter/flutter/issues/146248
550 captures.latch.Wait();
551
552 if (!captures.added) {
553 // Adding the view failed. Update the embedder's state to match the
554 // engine's state. This is unexpected and indicates a bug in the Windows
555 // embedder.
556 FML_LOG(ERROR) << "FlutterEngineAddView failed to add view";
557 fml::UniqueLock write_lock{*views_mutex_};
558 views_.erase(view_id);
559 return nullptr;
560 }
561 }
562
563 return std::move(view);
564 }

Referenced by CreateViewController().

## ◆ DispatchSemanticsAction()

bool flutter::FlutterWindowsEngine::DispatchSemanticsAction | ( | uint64_t | id,
|  | FlutterSemanticsAction | action,
|  | fml::MallocMapping | data
| ) |  |

Definition at line 876 of file flutter_windows_engine.cc.

879 {
880 return (embedder_api_.DispatchSemanticsAction(engine_, target, action,
881 data.GetMapping(),
882 data.GetSize()) == kSuccess);
883 }

Referenced by flutter::AccessibilityBridgeWindows::DispatchAccessibilityAction().

## ◆ egl_manager()

egl::Manager* flutter::FlutterWindowsEngine::egl_manager | ( |  | ) | const
| inline

Definition at line 165 of file flutter_windows_engine.h.

165 { return egl_manager_.get(); }

Referenced by flutter::FlutterWindowsView::CreateRenderSurface(), FlutterDesktopViewGetGraphicsAdapter(), flutter::FlutterWindowsView::OnWindowSizeChanged(), and flutter::FlutterWindowsTextureRegistrar::RegisterTexture().

## ◆ GetExecutableName()

std::string flutter::FlutterWindowsEngine::GetExecutableName | ( |  | ) | const

Definition at line 902 of file flutter_windows_engine.cc.

902 {
903 std::pair<bool, std::string> result = fml::paths::GetExecutablePath();
904 if (result.first) {
905 const std::string& executable_path = result.second;
906 size_t last_separator = executable_path.find_last_of("/\\");
907 if (last_separator == std::string::npos ||
908 last_separator == executable_path.size() - 1) {
909 return executable_path;
910 }
911 return executable_path.substr(last_separator + 1);
912 }
913 return "Flutter";
914 }

## ◆ GetRegistrar()

FlutterDesktopPluginRegistrarRef flutter::FlutterWindowsEngine::GetRegistrar | ( |  | ) |

Definition at line 668 of file flutter_windows_engine.cc.

668 {
669 return plugin_registrar_.get();
670 }

Referenced by FlutterDesktopEngineGetPluginRegistrar().

## ◆ HandlePlatformMessage()

void flutter::FlutterWindowsEngine::HandlePlatformMessage | ( | const FlutterPlatformMessage * | engine_message | ) |

Definition at line 740 of file flutter_windows_engine.cc.

741 {
742 if (engine_message->struct_size != sizeof(FlutterPlatformMessage)) {
743 FML_LOG(ERROR) << "Invalid message size received. Expected: "
744 << sizeof(FlutterPlatformMessage) << " but received "
745 << engine_message->struct_size;
746 return;
747 }
748
749 auto message = ConvertToDesktopMessage(*engine_message);
750
751 message_dispatcher_->HandleMessage(message, [this] {}, [this] {});
752 }

References message.

Referenced by Run().

## ◆ high_contrast_enabled()

bool flutter::FlutterWindowsEngine::high_contrast_enabled | ( |  | ) | const
| inline

Definition at line 248 of file flutter_windows_engine.h.

248 { return high_contrast_enabled_; }

## ◆ keyboard_key_handler()

KeyboardHandlerBase* flutter::FlutterWindowsEngine::keyboard_key_handler | ( |  | ) |
| inline

Definition at line 182 of file flutter_windows_engine.h.

182 {
183 return keyboard_key_handler_.get();
184 }

Referenced by flutter::FlutterWindowsView::OnPointerMove().

## ◆ lifecycle_manager()

WindowsLifecycleManager* flutter::FlutterWindowsEngine::lifecycle_manager | ( |  | ) |
| inline

Definition at line 293 of file flutter_windows_engine.h.

293 {
294 return lifecycle_manager_.get();
295 }

## ◆ MarkExternalTextureFrameAvailable()

bool flutter::FlutterWindowsEngine::MarkExternalTextureFrameAvailable | ( | int64_t | texture_id | ) |

Definition at line 850 of file flutter_windows_engine.cc.

851 {
852 return (embedder_api_.MarkExternalTextureFrameAvailable(
853 engine_, texture_id) == kSuccess);
854 }

## ◆ message_dispatcher()

IncomingMessageDispatcher* flutter::FlutterWindowsEngine::message_dispatcher | ( |  | ) |
| inline

Definition at line 151 of file flutter_windows_engine.h.

151 {
152 return message_dispatcher_.get();
153 }

Referenced by FlutterDesktopMessengerSetCallback().

## ◆ messenger()

FlutterDesktopMessengerRef flutter::FlutterWindowsEngine::messenger | ( |  | ) |
| inline

Definition at line 149 of file flutter_windows_engine.h.

149 { return messenger_->ToRef(); }

Referenced by FlutterDesktopEngineGetMessenger(), and FlutterDesktopPluginRegistrarGetMessenger().

## ◆ messenger_wrapper()

BinaryMessenger* flutter::FlutterWindowsEngine::messenger_wrapper | ( |  | ) |
| inline

Definition at line 157 of file flutter_windows_engine.h.

157 { return messenger_wrapper_.get(); }

## ◆ OnChannelUpdate()

void flutter::FlutterWindowsEngine::OnChannelUpdate | ( | std::string | name,
|  | bool | listening
| ) |  |
| protected virtual

Definition at line 978 of file flutter_windows_engine.cc.

978 {
979 if (name == "flutter/platform" && listening) {
980 lifecycle_manager_->BeginProcessingExit();
981 } else if (name == "flutter/lifecycle" && listening) {
982 lifecycle_manager_->BeginProcessingLifecycle();
983 }
984 }

## ◆ OnDwmCompositionChanged()

void flutter::FlutterWindowsEngine::OnDwmCompositionChanged | ( |  | ) |

Definition at line 953 of file flutter_windows_engine.cc.

953 {
954 fml::SharedLock read_lock{*views_mutex_};
955
956 for (auto iterator = views_.begin(); iterator != views_.end(); iterator++) {
957 iterator->second->OnDwmCompositionChanged();
958 }
959 }

Referenced by flutter::WindowsLifecycleManager::WindowProc().

## ◆ OnPreEngineRestart()

void flutter::FlutterWindowsEngine::OnPreEngineRestart | ( |  | ) |
| protected

Definition at line 897 of file flutter_windows_engine.cc.

897 {
898 // Reset the keyboard's state on hot restart.
899 InitializeKeyboard();
900 }

Referenced by Run().

## ◆ OnQuit()

void flutter::FlutterWindowsEngine::OnQuit | ( | std::optional< HWND > | hwnd,
|  | std::optional< WPARAM > | wparam,
|  | std::optional< LPARAM > | lparam,
|  | UINT | exit_code
| ) |  |

Definition at line 946 of file flutter_windows_engine.cc.

949 {
950 lifecycle_manager_->Quit(hwnd, wparam, lparam, exit_code);
951 }

Referenced by flutter::PlatformHandler::QuitApplication().

## ◆ OnVsync()

void flutter::FlutterWindowsEngine::OnVsync | ( | intptr_t | baton | ) |

Definition at line 628 of file flutter_windows_engine.cc.

628 {
629 std::chrono::nanoseconds current_time =
630 std::chrono::nanoseconds(embedder_api_.GetCurrentTime());
631 std::chrono::nanoseconds frame_interval = FrameInterval();
632 auto next = SnapToNextTick(current_time, start_time_, frame_interval);
633 embedder_api_.OnVsync(engine_, baton, next.count(),
634 (next + frame_interval).count());
635 }

Referenced by Run().

## ◆ OnWindowStateEvent()

void flutter::FlutterWindowsEngine::OnWindowStateEvent | ( | HWND | hwnd,
|  | WindowStateEvent | event
| ) |  |

Definition at line 961 of file flutter_windows_engine.cc.

962 {
963 lifecycle_manager_->OnWindowStateEvent(hwnd, event);
964 }

Referenced by flutter::FlutterWindowsView::OnWindowStateEvent(), and flutter::FlutterWindowsView::~FlutterWindowsView().

## ◆ PostRasterThreadTask()

bool flutter::FlutterWindowsEngine::PostRasterThreadTask | ( | fml::closure | callback | ) | const
| virtual

Definition at line 856 of file flutter_windows_engine.cc.

856 {
857 struct Captures {
858 fml::closure callback;
859 };
860 auto captures = new Captures();
861 captures->callback = std::move(callback);
862 if (embedder_api_.PostRenderThreadTask(
863 engine_,
864 [](void* opaque) {
865 auto captures = reinterpret_cast<Captures*>(opaque);
866 captures->callback();
867 delete captures;
868 },
869 captures) == kSuccess) {
870 return true;
871 }
872 delete captures;
873 return false;
874 }

References callback.

Referenced by flutter::FlutterWindowsTextureRegistrar::UnregisterTexture().

## ◆ ProcessExternalWindowMessage()

std::optional< LRESULT > flutter::FlutterWindowsEngine::ProcessExternalWindowMessage | ( | HWND | hwnd,
|  | UINT | message,
|  | WPARAM | wparam,
|  | LPARAM | lparam
| ) |  |

Definition at line 966 of file flutter_windows_engine.cc.

970 {
971 if (lifecycle_manager_) {
972 return lifecycle_manager_->ExternalWindowMessage(hwnd, message, wparam,
973 lparam);
974 }
975 return std::nullopt;
976 }

References message.

Referenced by FlutterDesktopEngineProcessExternalWindowMessage().

## ◆ RegisterExternalTexture()

bool flutter::FlutterWindowsEngine::RegisterExternalTexture | ( | int64_t | texture_id | ) |

Definition at line 840 of file flutter_windows_engine.cc.

840 {
841 return (embedder_api_.RegisterExternalTexture(engine_, texture_id) ==
842 kSuccess);
843 }

## ◆ ReloadSystemFonts()

void flutter::FlutterWindowsEngine::ReloadSystemFonts | ( |  | ) |

Definition at line 754 of file flutter_windows_engine.cc.

754 {
755 embedder_api_.ReloadSystemFonts(engine_);
756 }

Referenced by FlutterDesktopEngineReloadSystemFonts().

## ◆ RemoveView()

void flutter::FlutterWindowsEngine::RemoveView | ( | FlutterViewId | view_id | ) |
| virtual

Definition at line 566 of file flutter_windows_engine.cc.

566 {
567 FML_DCHECK(running());
568
569 // Notify the engine to stop rendering to the view if it isn't the implicit
570 // view. The engine and framework assume the implicit view always exists and
571 // can continue presenting.
572 if (view_id != kImplicitViewId) {
573 struct Captures {
574 fml::AutoResetWaitableEvent latch;
575 bool removed;
576 };
577 Captures captures = {};
578
579 FlutterRemoveViewInfo info = {};
580 info.struct_size = sizeof(FlutterRemoveViewInfo);
581 info.view_id = view_id;
582 info.user_data = &captures;
583 info.remove_view_callback = [](const FlutterRemoveViewResult* result) {
584 // This is invoked on an engine thread. If
585 // |FlutterRemoveViewResult.removed| is `true`, the engine guarantees the
586 // view won't be presented.
587 Captures* captures = reinterpret_cast<Captures*>(result->user_data);
588 captures->removed = result->removed;
589 captures->latch.Signal();
590 };
591
592 FlutterEngineResult result = embedder_api_.RemoveView(engine_, &info);
593 if (result != kSuccess) {
594 FML_LOG(ERROR) << "Starting the remove view operation failed. "
595 "FlutterEngineRemoveView "
596 "returned an unexpected result: "
597 << result
598 << ". This indicates a bug in the Windows embedder.";
599 FML_DCHECK(false);
600 return;
601 }
602
603 // Block the platform thread until the engine has removed the view.
604 // TODO(loicsharma): This blocks the platform thread eagerly and can
605 // cause unnecessary delay in input processing. Instead, this should block
606 // lazily only when an operation needs the view.
607 // https://github.com/flutter/flutter/issues/146248
608 captures.latch.Wait();
609
610 if (!captures.removed) {
611 // Removing the view failed. This is unexpected and indicates a bug in the
612 // Windows embedder.
613 FML_LOG(ERROR) << "FlutterEngineRemoveView failed to remove view";
614 return;
615 }
616 }
617
618 {
619 // The engine no longer presents to the view. Remove the view from the
620 // embedder.
621 fml::UniqueLock write_lock{*views_mutex_};
622
623 FML_DCHECK(views_.find(view_id) != views_.end());
624 views_.erase(view_id);
625 }
626 }

References flutter::kImplicitViewId.

## ◆ RequestApplicationQuit()

void flutter::FlutterWindowsEngine::RequestApplicationQuit | ( | HWND | hwnd,
|  | WPARAM | wparam,
|  | LPARAM | lparam,
|  | AppExitType | exit_type
| ) |  |

Definition at line 939 of file flutter_windows_engine.cc.

942 {
943 platform_handler_->RequestAppExit(hwnd, wparam, lparam, exit_type, 0);
944 }

## ◆ Run() [1/2]

bool flutter::FlutterWindowsEngine::Run | ( |  | ) |

Definition at line 239 of file flutter_windows_engine.cc.

239 {
240 return Run("");
241 }

Referenced by FlutterDesktopEngineRun().

## ◆ Run() [2/2]

bool flutter::FlutterWindowsEngine::Run | ( | std::string_view | entrypoint | ) |

Definition at line 243 of file flutter_windows_engine.cc.

243 {
244 if (!project_->HasValidPaths()) {
245 FML_LOG(ERROR) << "Missing or unresolvable paths to assets.";
246 return false;
247 }
248 std::string assets_path_string = project_->assets_path().u8string();
249 std::string icu_path_string = project_->icu_path().u8string();
250 if (embedder_api_.RunsAOTCompiledDartCode()) {
251 aot_data_ = project_->LoadAotData(embedder_api_);
252 if (!aot_data_) {
253 FML_LOG(ERROR) << "Unable to start engine without AOT data.";
254 return false;
255 }
256 }
257
258 // FlutterProjectArgs is expecting a full argv, so when processing it for
259 // flags the first item is treated as the executable and ignored. Add a dummy
260 // value so that all provided arguments are used.
261 std::string executable_name = GetExecutableName();
262 std::vector<const char*> argv = {executable_name.c_str()};
263 std::vector<std::string> switches = project_->GetSwitches();
264 std::transform(
265 switches.begin(), switches.end(), std::back_inserter(argv),
266 [](const std::string& arg) -> const char* { return arg.c_str(); });
267
268 const std::vector<std::string>& entrypoint_args =
269 project_->dart_entrypoint_arguments();
270 std::vector<const char*> entrypoint_argv;
271 std::transform(
272 entrypoint_args.begin(), entrypoint_args.end(),
273 std::back_inserter(entrypoint_argv),
274 [](const std::string& arg) -> const char* { return arg.c_str(); });
275
276 // Configure task runners.
277 FlutterTaskRunnerDescription platform_task_runner = {};
278 platform_task_runner.struct_size = sizeof(FlutterTaskRunnerDescription);
279 platform_task_runner.user_data = task_runner_.get();
280 platform_task_runner.runs_task_on_current_thread_callback =
281 [](void* user_data) -> bool {
282 return static_cast<TaskRunner*>(user_data)->RunsTasksOnCurrentThread();
283 };
284 platform_task_runner.post_task_callback = [](FlutterTask task,
285 uint64_t target_time_nanos,
286 void* user_data) -> void {
287 static_cast<TaskRunner*>(user_data)->PostFlutterTask(task,
288 target_time_nanos);
289 };
290 FlutterCustomTaskRunners custom_task_runners = {};
291 custom_task_runners.struct_size = sizeof(FlutterCustomTaskRunners);
292 custom_task_runners.platform_task_runner = &platform_task_runner;
293 custom_task_runners.thread_priority_setter =
294 &WindowsPlatformThreadPrioritySetter;
295
296 FlutterProjectArgs args = {};
297 args.struct_size = sizeof(FlutterProjectArgs);
298 args.shutdown_dart_vm_when_done = true;
299 args.assets_path = assets_path_string.c_str();
300 args.icu_data_path = icu_path_string.c_str();
301 args.command_line_argc = static_cast<int>(argv.size());
302 args.command_line_argv = argv.empty() ? nullptr : argv.data();
303
304 // Fail if conflicting non-default entrypoints are specified in the method
305 // argument and the project.
306 //
307 // TODO(cbracken): https://github.com/flutter/flutter/issues/109285
308 // The entrypoint method parameter should eventually be removed from this
309 // method and only the entrypoint specified in project_ should be used.
310 if (!project_->dart_entrypoint().empty() && !entrypoint.empty() &&
311 project_->dart_entrypoint() != entrypoint) {
312 FML_LOG(ERROR) << "Conflicting entrypoints were specified in "
313 "FlutterDesktopEngineProperties.dart_entrypoint and "
314 "FlutterDesktopEngineRun(engine, entry_point). ";
315 return false;
316 }
317 if (!entrypoint.empty()) {
318 args.custom_dart_entrypoint = entrypoint.data();
319 } else if (!project_->dart_entrypoint().empty()) {
320 args.custom_dart_entrypoint = project_->dart_entrypoint().c_str();
321 }
322 args.dart_entrypoint_argc = static_cast<int>(entrypoint_argv.size());
323 args.dart_entrypoint_argv =
324 entrypoint_argv.empty() ? nullptr : entrypoint_argv.data();
325 args.platform_message_callback =
326 [](const FlutterPlatformMessage* engine_message,
327 void* user_data) -> void {
328 auto host = static_cast<FlutterWindowsEngine*>(user_data);
329 return host->HandlePlatformMessage(engine_message);
330 };
331 args.vsync_callback = [](void* user_data, intptr_t baton) -> void {
332 auto host = static_cast<FlutterWindowsEngine*>(user_data);
333 host->OnVsync(baton);
334 };
335 args.on_pre_engine_restart_callback = [](void* user_data) {
336 auto host = static_cast<FlutterWindowsEngine*>(user_data);
337 host->OnPreEngineRestart();
338 };
339 args.update_semantics_callback2 = [](const FlutterSemanticsUpdate2* update,
340 void* user_data) {
341 auto host = static_cast<FlutterWindowsEngine*>(user_data);
342
343 // TODO(loicsharma): Remove implicit view assumption.
344 // https://github.com/flutter/flutter/issues/142845
345 auto view = host->view(kImplicitViewId);
346 if (!view) {
347 return;
348 }
349
350 auto accessibility_bridge = view->accessibility_bridge().lock();
351 if (!accessibility_bridge) {
352 return;
353 }
354
355 for (size_t i = 0; i < update->node_count; i++) {
356 const FlutterSemanticsNode2* node = update->nodes[i];
357 accessibility_bridge->AddFlutterSemanticsNodeUpdate(*node);
358 }
359
360 for (size_t i = 0; i < update->custom_action_count; i++) {
361 const FlutterSemanticsCustomAction2* action = update->custom_actions[i];
362 accessibility_bridge->AddFlutterSemanticsCustomActionUpdate(*action);
363 }
364
365 accessibility_bridge->CommitUpdates();
366 };
367 args.root_isolate_create_callback = [](void* user_data) {
368 auto host = static_cast<FlutterWindowsEngine*>(user_data);
369 if (host->root_isolate_create_callback_) {
370 host->root_isolate_create_callback_();
371 }
372 };
373 args.channel_update_callback = [](const FlutterChannelUpdate* update,
374 void* user_data) {
375 auto host = static_cast<FlutterWindowsEngine*>(user_data);
376 if (SAFE_ACCESS(update, channel, nullptr) != nullptr) {
377 std::string channel_name(update->channel);
378 host->OnChannelUpdate(std::move(channel_name),
379 SAFE_ACCESS(update, listening, false));
380 }
381 };
382
383 args.custom_task_runners = &custom_task_runners;
384
385 if (!platform_view_plugin_) {
386 platform_view_plugin_ = std::make_unique<PlatformViewPlugin>(
387 messenger_wrapper_.get(), task_runner_.get());
388 }
389 if (egl_manager_) {
390 auto resolver = [](const char* name) -> void* {
391 return reinterpret_cast<void*>(::eglGetProcAddress(name));
392 };
393
394 // TODO(schectman) Pass the platform view manager to the compositor
395 // constructors: https://github.com/flutter/flutter/issues/143375
396 compositor_ = std::make_unique<CompositorOpenGL>(this, resolver);
397 } else {
398 compositor_ = std::make_unique<CompositorSoftware>();
399 }
400
401 FlutterCompositor compositor = {};
402 compositor.struct_size = sizeof(FlutterCompositor);
403 compositor.user_data = this;
404 compositor.create_backing_store_callback =
405 [](const FlutterBackingStoreConfig* config,
406 FlutterBackingStore* backing_store_out, void* user_data) -> bool {
407 auto host = static_cast<FlutterWindowsEngine*>(user_data);
408
409 return host->compositor_->CreateBackingStore(*config, backing_store_out);
410 };
411
412 compositor.collect_backing_store_callback =
413 [](const FlutterBackingStore* backing_store, void* user_data) -> bool {
414 auto host = static_cast<FlutterWindowsEngine*>(user_data);
415
416 return host->compositor_->CollectBackingStore(backing_store);
417 };
418
419 compositor.present_view_callback =
420 [](const FlutterPresentViewInfo* info) -> bool {
421 auto host = static_cast<FlutterWindowsEngine*>(info->user_data);
422
423 return host->Present(info);
424 };
425 args.compositor = &compositor;
426
427 if (aot_data_) {
428 args.aot_data = aot_data_.get();
429 }
430
431 // The platform thread creates OpenGL contexts. These
432 // must be released to be used by the engine's threads.
433 FML_DCHECK(!egl_manager_ || !egl_manager_->HasContextCurrent());
434
435 FlutterRendererConfig renderer_config;
436
437 if (enable_impeller_) {
438 // Impeller does not support a Software backend. Avoid falling back and
439 // confusing the engine on which renderer is selected.
440 if (!egl_manager_) {
441 FML_LOG(ERROR) << "Could not create surface manager. Impeller backend "
442 "does not support software rendering.";
443 return false;
444 }
445 renderer_config = GetOpenGLRendererConfig();
446 } else {
447 renderer_config =
448 egl_manager_ ? GetOpenGLRendererConfig() : GetSoftwareRendererConfig();
449 }
450
451 auto result = embedder_api_.Run(FLUTTER_ENGINE_VERSION, &renderer_config,
452 &args, this, &engine_);
453 if (result != kSuccess || engine_ == nullptr) {
454 FML_LOG(ERROR) << "Failed to start Flutter engine: error " << result;
455 return false;
456 }
457
458 // Configure device frame rate displayed via devtools.
459 FlutterEngineDisplay display = {};
460 display.struct_size = sizeof(FlutterEngineDisplay);
461 display.display_id = 0;
462 display.single_display = true;
463 display.refresh_rate =
464 1.0 / (static_cast<double>(FrameInterval().count()) / 1000000000.0);
465
466 std::vector<FlutterEngineDisplay> displays = {display};
467 embedder_api_.NotifyDisplayUpdate(engine_,
468 kFlutterEngineDisplaysUpdateTypeStartup,
469 displays.data(), displays.size());
470
471 SendSystemLocales();
472 SetLifecycleState(flutter::AppLifecycleState::kResumed);
473
474 settings_plugin_->StartWatching();
475 settings_plugin_->SendSettings();
476
477 InitializeKeyboard();
478
479 return true;
480 }

References flutter::FlutterWindowsView::accessibility_bridge(), action, HandlePlatformMessage(), flutter::kImplicitViewId, OnPreEngineRestart(), OnVsync(), user_data, view(), and flutter::WindowsPlatformThreadPrioritySetter().

## ◆ running()

virtual bool flutter::FlutterWindowsEngine::running | ( |  | ) | const
| inline virtual

Definition at line 117 of file flutter_windows_engine.h.

117 { return engine_ != nullptr; }

Referenced by FlutterDesktopEngineDestroy().

## ◆ ScheduleFrame()

void flutter::FlutterWindowsEngine::ScheduleFrame | ( |  | ) |

Definition at line 758 of file flutter_windows_engine.cc.

758 {
759 embedder_api_.ScheduleFrame(engine_);
760 }

Referenced by flutter::FlutterWindowsView::ForceRedraw().

## ◆ semantics_enabled()

bool flutter::FlutterWindowsEngine::semantics_enabled | ( |  | ) | const
| inline

Definition at line 239 of file flutter_windows_engine.h.

239 { return semantics_enabled_; }

Referenced by flutter::AccessibilityPlugin::Announce().

## ◆ SendKeyEvent()

void flutter::FlutterWindowsEngine::SendKeyEvent | ( | const FlutterKeyEvent & | event,
|  | FlutterKeyEventCallback | callback,
|  | void * | user_data
| ) |  |

Definition at line 691 of file flutter_windows_engine.cc.

693 {
694 if (engine_) {
695 embedder_api_.SendKeyEvent(engine_, &event, callback, user_data);
696 }
697 }

## ◆ SendPlatformMessage()

bool flutter::FlutterWindowsEngine::SendPlatformMessage | ( | const char * | channel,
|  | const uint8_t * | message,
|  | const size_t | message_size,
|  | const FlutterDesktopBinaryReply | reply,
|  | void * | user_data
| ) |  |

Definition at line 699 of file flutter_windows_engine.cc.

704 {
705 FlutterPlatformMessageResponseHandle* response_handle = nullptr;
706 if (reply != nullptr && user_data != nullptr) {
707 FlutterEngineResult result =
708 embedder_api_.PlatformMessageCreateResponseHandle(
709 engine_, reply, user_data, &response_handle);
710 if (result != kSuccess) {
711 FML_LOG(ERROR) << "Failed to create response handle";
712 return false;
713 }
714 }
715
716 FlutterPlatformMessage platform_message = {
717 sizeof(FlutterPlatformMessage),
718 channel,
719 message,
720 message_size,
721 response_handle,
722 };
723
724 FlutterEngineResult message_result =
725 embedder_api_.SendPlatformMessage(engine_, &platform_message);
726 if (response_handle != nullptr) {
727 embedder_api_.PlatformMessageReleaseResponseHandle(engine_,
728 response_handle);
729 }
730 return message_result == kSuccess;
731 }

References user_data.

Referenced by FlutterDesktopMessengerSendWithReply().

## ◆ SendPlatformMessageResponse()

void flutter::FlutterWindowsEngine::SendPlatformMessageResponse | ( | const FlutterDesktopMessageResponseHandle * | handle,
|  | const uint8_t * | data,
|  | size_t | data_length
| ) |  |

Definition at line 733 of file flutter_windows_engine.cc.

736 {
737 embedder_api_.SendPlatformMessageResponse(engine_, handle, data, data_length);
738 }

Referenced by FlutterDesktopMessengerSendResponse().

## ◆ SendPointerEvent()

void flutter::FlutterWindowsEngine::SendPointerEvent | ( | const FlutterPointerEvent & | event | ) |

Definition at line 685 of file flutter_windows_engine.cc.

685 {
686 if (engine_) {
687 embedder_api_.SendPointerEvent(engine_, &event, 1);
688 }
689 }

## ◆ SendWindowMetricsEvent()

void flutter::FlutterWindowsEngine::SendWindowMetricsEvent | ( | const FlutterWindowMetricsEvent & | event | ) |

Definition at line 678 of file flutter_windows_engine.cc.

679 {
680 if (engine_) {
681 embedder_api_.SendWindowMetricsEvent(engine_, &event);
682 }
683 }

Referenced by flutter::FlutterWindowsView::SendInitialBounds().

## ◆ SetNextFrameCallback()

void flutter::FlutterWindowsEngine::SetNextFrameCallback | ( | fml::closure | callback | ) |

Definition at line 762 of file flutter_windows_engine.cc.

762 {
763 next_frame_callback_ = std::move(callback);
764
765 embedder_api_.SetNextFrameCallback(
766 engine_,
767 [](void* user_data) {
768 // Embedder callback runs on raster thread. Switch back to platform
769 // thread.
770 FlutterWindowsEngine* self =
771 static_cast<FlutterWindowsEngine*>(user_data);
772
773 self->task_runner_->PostTask(std::move(self->next_frame_callback_));
774 },
775 this);
776 }

Referenced by FlutterDesktopEngineSetNextFrameCallback().

## ◆ SetRootIsolateCreateCallback()

void flutter::FlutterWindowsEngine::SetRootIsolateCreateCallback | ( | const fml::closure & | callback | ) |
| inline

Definition at line 259 of file flutter_windows_engine.h.

259 {
260 root_isolate_create_callback_ = callback;
261 }

References callback.

## ◆ SetSwitches()

void flutter::FlutterWindowsEngine::SetSwitches | ( | const std::vector< std::string > & | switches | ) |

Definition at line 234 of file flutter_windows_engine.cc.

235 {
236 project_->SetSwitches(switches);
237 }

## ◆ Stop()

bool flutter::FlutterWindowsEngine::Stop | ( |  | ) |
| virtual

Definition at line 482 of file flutter_windows_engine.cc.

482 {
483 if (engine_) {
484 for (const auto& [callback, registrar] :
485 plugin_registrar_destruction_callbacks_) {
486 callback(registrar);
487 }
488 FlutterEngineResult result = embedder_api_.Shutdown(engine_);
489 engine_ = nullptr;
490 return (result == kSuccess);
491 }
492 return false;
493 }

Referenced by FlutterDesktopEngineDestroy().

## ◆ task_runner()

TaskRunner* flutter::FlutterWindowsEngine::task_runner | ( |  | ) |
| inline

Definition at line 155 of file flutter_windows_engine.h.

155 { return task_runner_.get(); }

Referenced by flutter::FlutterWindowsTextureRegistrar::MarkTextureFrameAvailable(), and flutter::FlutterWindowsTextureRegistrar::UnregisterTexture().

## ◆ text_input_plugin()

TextInputPlugin* flutter::FlutterWindowsEngine::text_input_plugin | ( |  | ) |
| inline

Definition at line 185 of file flutter_windows_engine.h.

185 { return text_input_plugin_.get(); }

## ◆ texture_registrar()

FlutterWindowsTextureRegistrar* flutter::FlutterWindowsEngine::texture_registrar | ( |  | ) |
| inline

Definition at line 159 of file flutter_windows_engine.h.

159 {
160 return texture_registrar_.get();
161 }

Referenced by FlutterDesktopRegistrarGetTextureRegistrar().

## ◆ UnregisterExternalTexture()

bool flutter::FlutterWindowsEngine::UnregisterExternalTexture | ( | int64_t | texture_id | ) |

Definition at line 845 of file flutter_windows_engine.cc.

845 {
846 return (embedder_api_.UnregisterExternalTexture(engine_, texture_id) ==
847 kSuccess);
848 }

## ◆ UpdateAccessibilityFeatures()

void flutter::FlutterWindowsEngine::UpdateAccessibilityFeatures | ( |  | ) |

Definition at line 916 of file flutter_windows_engine.cc.

916 {
917 UpdateHighContrastMode();
918 }

Referenced by flutter::testing::TEST_F().

## ◆ UpdateHighContrastMode()

void flutter::FlutterWindowsEngine::UpdateHighContrastMode | ( |  | ) |

Definition at line 920 of file flutter_windows_engine.cc.

920 {
921 high_contrast_enabled_ = windows_proc_table_->GetHighContrastEnabled();
922
923 SendAccessibilityFeatures();
924 settings_plugin_->UpdateHighContrastMode(high_contrast_enabled_);
925 }

Referenced by flutter::FlutterWindowsView::OnHighContrastChanged().

## ◆ UpdateSemanticsEnabled()

void flutter::FlutterWindowsEngine::UpdateSemanticsEnabled | ( | bool | enabled | ) |

Definition at line 885 of file flutter_windows_engine.cc.

885 {
886 if (engine_ && semantics_enabled_ != enabled) {
887 fml::SharedLock read_lock{*views_mutex_};
888
889 semantics_enabled_ = enabled;
890 embedder_api_.UpdateSemanticsEnabled(engine_, enabled);
891 for (auto iterator = views_.begin(); iterator != views_.end(); iterator++) {
892 iterator->second->UpdateSemanticsEnabled(enabled);
893 }
894 }
895 }

Referenced by flutter::FlutterWindowsView::OnUpdateSemanticsEnabled(), and flutter::testing::TEST_F().

## ◆ view()

FlutterWindowsView * flutter::FlutterWindowsEngine::view | ( | FlutterViewId | view_id | ) | const

Definition at line 656 of file flutter_windows_engine.cc.

656 {
657 fml::SharedLock read_lock{*views_mutex_};
658
659 auto iterator = views_.find(view_id);
660 if (iterator == views_.end()) {
661 return nullptr;
662 }
663
664 return iterator->second;
665 }

Referenced by flutter::AccessibilityPlugin::Announce(), FlutterDesktopPluginRegistrarGetView(), FlutterDesktopPluginRegistrarGetViewById(), flutter::PlatformHandler::GetHasStrings(), flutter::PlatformHandler::GetPlainText(), Run(), and flutter::PlatformHandler::SetPlainText().

## ◆ window_proc_delegate_manager()

WindowProcDelegateManager* flutter::FlutterWindowsEngine::window_proc_delegate_manager | ( |  | ) |
| inline

Definition at line 167 of file flutter_windows_engine.h.

167 {
168 return window_proc_delegate_manager_.get();
169 }

Referenced by FlutterDesktopPluginRegistrarRegisterTopLevelWindowProcDelegate(), and FlutterDesktopPluginRegistrarUnregisterTopLevelWindowProcDelegate().

## ◆ windows_proc_table()

std::shared_ptr<WindowsProcTable> flutter::FlutterWindowsEngine::windows_proc_table | ( |  | ) |
| inline

Definition at line 297 of file flutter_windows_engine.h.

297 {
298 return windows_proc_table_;
299 }

Referenced by CreateViewController().

## Friends And Related Function Documentation

## ◆ EngineModifier

friend class EngineModifier
| friend

Definition at line 330 of file flutter_windows_engine.h.

The documentation for this class was generated from the following files:

- shell/platform/windows/flutter_windows_engine.h
- shell/platform/windows/flutter_windows_engine.cc

flutter::kImplicitViewId
constexpr FlutterViewId kImplicitViewId
Definition: flutter_windows_engine.h:55
flutter::FlutterWindowsView::CreateRenderSurface
void CreateRenderSurface()
Definition: flutter_windows_view.cc:697
flutter::FlutterWindowsEngine::view
FlutterWindowsView * view(FlutterViewId view_id) const
Definition: flutter_windows_engine.cc:656
user_data
void * user_data
Definition: flutter_windows_view_unittests.cc:53
flutter::FlutterWindowsView::accessibility_bridge
std::weak_ptr< AccessibilityBridgeWindows > accessibility_bridge()
Definition: flutter_windows_view.h:242
flutter::FlutterWindowsEngine::running
virtual bool running() const
Definition: flutter_windows_engine.h:117
flutter::FlutterWindowsEngine::FlutterWindowsEngine
FlutterWindowsEngine(const FlutterProjectBundle &project, std::shared_ptr< WindowsProcTable > windows_proc_table=nullptr)
Definition: flutter_windows_engine.cc:147
flutter::FlutterWindowsView::IsImplicitView
bool IsImplicitView() const
Definition: flutter_windows_view.cc:693
flutter::FlutterWindowsEngine::windows_proc_table
std::shared_ptr< WindowsProcTable > windows_proc_table()
Definition: flutter_windows_engine.h:297
flutter::FlutterWindowsEngine::Stop
virtual bool Stop()
Definition: flutter_windows_engine.cc:482
flutter::FlutterWindowsEngine::messenger
FlutterDesktopMessengerRef messenger()
Definition: flutter_windows_engine.h:149
flutter::FlutterWindowsEngine::keyboard_key_handler
KeyboardHandlerBase * keyboard_key_handler()
Definition: flutter_windows_engine.h:182
flutter::FlutterWindowsEngine::SendKeyEvent
void SendKeyEvent(const FlutterKeyEvent &event, FlutterKeyEventCallback callback, void *user_data)
Definition: flutter_windows_engine.cc:691
flutter::egl::ProcTable::Create
static std::shared_ptr< ProcTable > Create()
Definition: proc_table.cc:12
flutter::FlutterWindowsEngine::UpdateHighContrastMode
void UpdateHighContrastMode()
Definition: flutter_windows_engine.cc:920
flutter::AppLifecycleState::kResumed
@ kResumed
message
Win32Message message
Definition: keyboard_unittests.cc:137
action
int action
Definition: keyboard_key_handler_unittests.cc:116
flutter::egl::Manager::Create
static std::unique_ptr< Manager > Create(bool enable_impeller)
Definition: manager.cc:17
flutter::FlutterWindowsView::CreateWindowMetricsEvent
FlutterWindowMetricsEvent CreateWindowMetricsEvent() const
Definition: flutter_windows_view.cc:375
flutter::FlutterWindowsEngine::Run
bool Run()
Definition: flutter_windows_engine.cc:239
flutter::WindowsPlatformThreadPrioritySetter
static void WindowsPlatformThreadPrioritySetter(FlutterThreadPriority priority)
Definition: flutter_windows_engine.h:60
texture_id
uint32_t texture_id
Definition: compositor_opengl.cc:20
flutter::AccessibilityPlugin::SetUp
static void SetUp(BinaryMessenger *binary_messenger, AccessibilityPlugin *plugin)
Definition: accessibility_plugin.cc:76
flutter::FlutterWindowsEngine::GetExecutableName
std::string GetExecutableName() const
Definition: flutter_windows_engine.cc:902
callback
FlutterDesktopBinaryReply callback
Definition: flutter_windows_view_unittests.cc:52