| // 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_FUCHSIA_VSYNC_WAITER_H_ |
| #define FLUTTER_SHELL_PLATFORM_FUCHSIA_VSYNC_WAITER_H_ |
| |
| #include <lib/async/cpp/wait.h> |
| |
| #include "flutter/fml/macros.h" |
| #include "flutter/fml/memory/weak_ptr.h" |
| #include "flutter/fml/time/time_delta.h" |
| #include "flutter/fml/time/time_point.h" |
| #include "flutter/shell/common/vsync_waiter.h" |
| #include "flutter_runner_product_configuration.h" |
| |
| namespace flutter_runner { |
| |
| class VsyncWaiter final : public flutter::VsyncWaiter { |
| public: |
| static constexpr zx_signals_t SessionPresentSignal = ZX_EVENT_SIGNALED; |
| |
| VsyncWaiter(std::string debug_label, |
| zx_handle_t session_present_handle, |
| flutter::TaskRunners task_runners, |
| fml::TimeDelta vsync_offset); |
| |
| ~VsyncWaiter() override; |
| |
| static fml::TimePoint SnapToNextPhase( |
| const fml::TimePoint now, |
| const fml::TimePoint last_frame_presentation_time, |
| const fml::TimeDelta presentation_interval); |
| |
| private: |
| const std::string debug_label_; |
| async::Wait session_wait_; |
| fml::TimeDelta vsync_offset_ = fml::TimeDelta::FromMicroseconds(0); |
| |
| fml::WeakPtrFactory<VsyncWaiter> weak_factory_; |
| |
| // For accessing the VsyncWaiter via the UI thread, necessary for the callback |
| // for AwaitVSync() |
| std::unique_ptr<fml::WeakPtrFactory<VsyncWaiter>> weak_factory_ui_; |
| |
| // |flutter::VsyncWaiter| |
| void AwaitVSync() override; |
| |
| void FireCallbackWhenSessionAvailable(); |
| |
| void FireCallbackNow(); |
| |
| FML_DISALLOW_COPY_AND_ASSIGN(VsyncWaiter); |
| }; |
| |
| } // namespace flutter_runner |
| |
| #endif // FLUTTER_SHELL_PLATFORM_FUCHSIA_VSYNC_WAITER_H_ |