mirror of
https://github.com/encounter/engine.git
synced 2026-03-30 11:09:55 -07:00
gaaclarke
123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
// 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_COMMON_ANIMATOR_H_
|
|
#define FLUTTER_SHELL_COMMON_ANIMATOR_H_
|
|
|
|
#include <deque>
|
|
|
|
#include "flutter/common/task_runners.h"
|
|
#include "flutter/fml/memory/ref_ptr.h"
|
|
#include "flutter/fml/memory/weak_ptr.h"
|
|
#include "flutter/fml/synchronization/semaphore.h"
|
|
#include "flutter/fml/time/time_point.h"
|
|
#include "flutter/shell/common/pipeline.h"
|
|
#include "flutter/shell/common/rasterizer.h"
|
|
#include "flutter/shell/common/vsync_waiter.h"
|
|
|
|
namespace flutter {
|
|
|
|
namespace testing {
|
|
class ShellTest;
|
|
}
|
|
|
|
/// Executor of animations.
|
|
///
|
|
/// In conjunction with the |VsyncWaiter| it allows callers (typically Dart
|
|
/// code) to schedule work that ends up generating a |LayerTree|.
|
|
class Animator final {
|
|
public:
|
|
class Delegate {
|
|
public:
|
|
virtual void OnAnimatorBeginFrame(fml::TimePoint frame_time) = 0;
|
|
|
|
virtual void OnAnimatorNotifyIdle(int64_t deadline) = 0;
|
|
|
|
virtual void OnAnimatorDraw(
|
|
fml::RefPtr<Pipeline<flutter::LayerTree>> pipeline) = 0;
|
|
|
|
virtual void OnAnimatorDrawLastLayerTree() = 0;
|
|
};
|
|
|
|
Animator(Delegate& delegate,
|
|
TaskRunners task_runners,
|
|
std::unique_ptr<VsyncWaiter> waiter);
|
|
|
|
~Animator();
|
|
|
|
float GetDisplayRefreshRate() const;
|
|
|
|
void RequestFrame(bool regenerate_layer_tree = true);
|
|
|
|
void Render(std::unique_ptr<flutter::LayerTree> layer_tree);
|
|
|
|
//--------------------------------------------------------------------------
|
|
/// @brief Schedule a secondary callback to be executed right after the
|
|
/// main `VsyncWaiter::AsyncWaitForVsync` callback (which is added
|
|
/// by `Animator::RequestFrame`).
|
|
///
|
|
/// Like the callback in `AsyncWaitForVsync`, this callback is
|
|
/// only scheduled to be called once, and it's supposed to be
|
|
/// called in the UI thread. If there is no AsyncWaitForVsync
|
|
/// callback (`Animator::RequestFrame` is not called), this
|
|
/// secondary callback will still be executed at vsync.
|
|
///
|
|
/// This callback is used to provide the vsync signal needed by
|
|
/// `SmoothPointerDataDispatcher`.
|
|
///
|
|
/// @see `PointerDataDispatcher::ScheduleSecondaryVsyncCallback`.
|
|
void ScheduleSecondaryVsyncCallback(const fml::closure& callback);
|
|
|
|
void Start();
|
|
|
|
void Stop();
|
|
|
|
void SetDimensionChangePending();
|
|
|
|
// Enqueue |trace_flow_id| into |trace_flow_ids_|. The corresponding flow
|
|
// will be ended during the next |BeginFrame|.
|
|
void EnqueueTraceFlowId(uint64_t trace_flow_id);
|
|
|
|
private:
|
|
using LayerTreePipeline = Pipeline<flutter::LayerTree>;
|
|
|
|
void BeginFrame(fml::TimePoint frame_start_time,
|
|
fml::TimePoint frame_target_time);
|
|
|
|
bool CanReuseLastLayerTree();
|
|
void DrawLastLayerTree();
|
|
|
|
void AwaitVSync();
|
|
|
|
const char* FrameParity();
|
|
|
|
Delegate& delegate_;
|
|
TaskRunners task_runners_;
|
|
std::shared_ptr<VsyncWaiter> waiter_;
|
|
|
|
fml::TimePoint last_begin_frame_time_;
|
|
int64_t dart_frame_deadline_;
|
|
fml::RefPtr<LayerTreePipeline> layer_tree_pipeline_;
|
|
fml::Semaphore pending_frame_semaphore_;
|
|
LayerTreePipeline::ProducerContinuation producer_continuation_;
|
|
int64_t frame_number_;
|
|
bool paused_;
|
|
bool regenerate_layer_tree_;
|
|
bool frame_scheduled_;
|
|
int notify_idle_task_id_;
|
|
bool dimension_change_pending_;
|
|
SkISize last_layer_tree_size_;
|
|
std::deque<uint64_t> trace_flow_ids_;
|
|
|
|
fml::WeakPtrFactory<Animator> weak_factory_;
|
|
|
|
friend class testing::ShellTest;
|
|
|
|
FML_DISALLOW_COPY_AND_ASSIGN(Animator);
|
|
};
|
|
|
|
} // namespace flutter
|
|
|
|
#endif // FLUTTER_SHELL_COMMON_ANIMATOR_H_
|