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12820b573f
Add a new field, max_frames_in_flight, to FlutterRunnerProductConfiguration. This allows it to be configurable from Fuchsia. Tests were added as well to verify the new behavior.
92 lines
3.2 KiB
C++
92 lines
3.2 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef FLUTTER_SHELL_PLATFORM_FUCHSIA_SESSION_CONNECTION_H_
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#define FLUTTER_SHELL_PLATFORM_FUCHSIA_SESSION_CONNECTION_H_
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#include <fuchsia/scenic/scheduling/cpp/fidl.h>
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#include <fuchsia/ui/scenic/cpp/fidl.h>
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#include <lib/fidl/cpp/interface_handle.h>
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#include <lib/ui/scenic/cpp/session.h>
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#include "flutter/flow/scene_update_context.h"
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#include "flutter/fml/closure.h"
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#include "flutter/fml/macros.h"
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namespace flutter_runner {
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using on_frame_presented_event =
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std::function<void(fuchsia::scenic::scheduling::FramePresentedInfo)>;
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// The component residing on the raster thread that is responsible for
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// maintaining the Scenic session connection and presenting node updates.
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class SessionConnection final : public flutter::SessionWrapper {
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public:
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SessionConnection(std::string debug_label,
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fidl::InterfaceHandle<fuchsia::ui::scenic::Session> session,
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fml::closure session_error_callback,
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on_frame_presented_event on_frame_presented_callback,
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zx_handle_t vsync_event_handle,
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uint64_t max_frames_in_flight);
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~SessionConnection();
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scenic::Session* get() override { return &session_wrapper_; }
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void Present() override;
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static fml::TimePoint CalculateNextLatchPoint(
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fml::TimePoint present_requested_time,
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fml::TimePoint now,
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fml::TimePoint last_latch_point_targeted,
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fml::TimeDelta flutter_frame_build_time,
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fml::TimeDelta vsync_interval,
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std::deque<std::pair<fml::TimePoint, fml::TimePoint>>&
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future_presentation_infos);
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private:
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scenic::Session session_wrapper_;
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on_frame_presented_event on_frame_presented_callback_;
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zx_handle_t vsync_event_handle_;
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fml::TimePoint last_latch_point_targeted_ =
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fml::TimePoint::FromEpochDelta(fml::TimeDelta::Zero());
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fml::TimePoint present_requested_time_ =
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fml::TimePoint::FromEpochDelta(fml::TimeDelta::Zero());
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std::deque<std::pair<fml::TimePoint, fml::TimePoint>>
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future_presentation_infos_ = {};
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bool initialized_ = false;
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// A flow event trace id for following |Session::Present| calls into
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// Scenic. This will be incremented each |Session::Present| call. By
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// convention, the Scenic side will also contain its own trace id that
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// begins at 0, and is incremented each |Session::Present| call.
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uint64_t next_present_trace_id_ = 0;
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uint64_t next_present_session_trace_id_ = 0;
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uint64_t processed_present_session_trace_id_ = 0;
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// The maximum number of frames Flutter sent to Scenic that it can have
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// outstanding at any time. This is equivalent to how many times it has
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// called Present2() before receiving an OnFramePresented() event.
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const int kMaxFramesInFlight;
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int frames_in_flight_ = 0;
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int frames_in_flight_allowed_ = 0;
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bool present_session_pending_ = false;
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void PresentSession();
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static void ToggleSignal(zx_handle_t handle, bool raise);
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FML_DISALLOW_COPY_AND_ASSIGN(SessionConnection);
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};
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} // namespace flutter_runner
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#endif // FLUTTER_SHELL_PLATFORM_FUCHSIA_SESSION_CONNECTION_H_
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