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cb8eb801a4
Currently, all Flutter threads are managed by the engine itself. This works for all threads except the platform thread. On this thread, the engine cannot see the underlying event multiplexing mechanism. Using the new task runner interfaces, the engine can relinquish the task of setting up the event multiplexing mechanism and instead have the embedder provide one for it during setup. This scheme is only wired up for the platform thread. But, the eventual goal is to expose this message loop interoperability for all threads.
86 lines
2.6 KiB
C++
86 lines
2.6 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_EMBEDDER_EMBEDDER_ENGINE_H_
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#define FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_ENGINE_H_
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#include <memory>
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#include <unordered_map>
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#include "flutter/fml/macros.h"
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#include "flutter/shell/common/shell.h"
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#include "flutter/shell/common/thread_host.h"
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#include "flutter/shell/platform/embedder/embedder.h"
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#include "flutter/shell/platform/embedder/embedder_engine.h"
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#include "flutter/shell/platform/embedder/embedder_external_texture_gl.h"
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#include "flutter/shell/platform/embedder/embedder_thread_host.h"
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namespace shell {
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// The object that is returned to the embedder as an opaque pointer to the
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// instance of the Flutter engine.
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class EmbedderEngine {
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public:
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EmbedderEngine(std::unique_ptr<EmbedderThreadHost> thread_host,
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blink::TaskRunners task_runners,
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blink::Settings settings,
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Shell::CreateCallback<PlatformView> on_create_platform_view,
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Shell::CreateCallback<Rasterizer> on_create_rasterizer,
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EmbedderExternalTextureGL::ExternalTextureCallback
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external_texture_callback);
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~EmbedderEngine();
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bool NotifyCreated();
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bool NotifyDestroyed();
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bool Run(RunConfiguration run_configuration);
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bool IsValid() const;
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bool SetViewportMetrics(blink::ViewportMetrics metrics);
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bool DispatchPointerDataPacket(
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std::unique_ptr<blink::PointerDataPacket> packet);
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bool SendPlatformMessage(fml::RefPtr<blink::PlatformMessage> message);
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bool RegisterTexture(int64_t texture);
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bool UnregisterTexture(int64_t texture);
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bool MarkTextureFrameAvailable(int64_t texture);
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bool SetSemanticsEnabled(bool enabled);
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bool SetAccessibilityFeatures(int32_t flags);
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bool DispatchSemanticsAction(int id,
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blink::SemanticsAction action,
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std::vector<uint8_t> args);
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bool OnVsyncEvent(intptr_t baton,
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fml::TimePoint frame_start_time,
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fml::TimePoint frame_target_time);
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bool PostRenderThreadTask(fml::closure task);
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bool RunTask(const FlutterTask* task);
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private:
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const std::unique_ptr<EmbedderThreadHost> thread_host_;
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std::unique_ptr<Shell> shell_;
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const EmbedderExternalTextureGL::ExternalTextureCallback
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external_texture_callback_;
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bool is_valid_ = false;
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uint64_t next_pointer_flow_id_;
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FML_DISALLOW_COPY_AND_ASSIGN(EmbedderEngine);
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};
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} // namespace shell
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#endif // FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_ENGINE_H_
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