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137 lines
4.6 KiB
C++
137 lines
4.6 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/ui/gfx/cpp/fidl.h>
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#include <fuchsia/ui/scenic/cpp/fidl.h>
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#include <fuchsia/ui/views/cpp/fidl.h>
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#include <lib/fidl/cpp/interface_handle.h>
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#include <lib/fidl/cpp/optional.h>
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#include <lib/fit/function.h>
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#include <lib/ui/scenic/cpp/resources.h>
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#include <lib/ui/scenic/cpp/session.h>
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#include <lib/ui/scenic/cpp/view_ref_pair.h>
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#include "flutter/flow/compositor_context.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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#include "flutter/fml/trace_event.h"
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#include "vulkan_surface_producer.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 {
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public:
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SessionConnection(std::string debug_label,
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fuchsia::ui::views::ViewToken view_token,
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scenic::ViewRefPair view_ref_pair,
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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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~SessionConnection();
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bool has_metrics() const { return scene_update_context_.has_metrics(); }
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const fuchsia::ui::gfx::MetricsPtr& metrics() const {
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return scene_update_context_.metrics();
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}
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void set_metrics(const fuchsia::ui::gfx::Metrics& metrics) {
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fuchsia::ui::gfx::Metrics metrics_copy;
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metrics.Clone(&metrics_copy);
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scene_update_context_.set_metrics(
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fidl::MakeOptional(std::move(metrics_copy)));
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}
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void set_enable_wireframe(bool enable);
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flutter::SceneUpdateContext& scene_update_context() {
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return scene_update_context_;
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}
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scenic::ContainerNode& root_node() { return root_node_; }
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scenic::View* root_view() { return &root_view_; }
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void Present(flutter::CompositorContext::ScopedFrame* frame);
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void OnSessionSizeChangeHint(float width_change_factor,
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float height_change_factor);
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VulkanSurfaceProducer* vulkan_surface_producer() {
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return surface_producer_.get();
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}
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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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const std::string debug_label_;
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scenic::Session session_wrapper_;
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scenic::View root_view_;
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scenic::EntityNode root_node_;
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std::unique_ptr<VulkanSurfaceProducer> surface_producer_;
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flutter::SceneUpdateContext scene_update_context_;
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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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static constexpr int kMaxFramesInFlight = 3;
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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 EnqueueClearOps();
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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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