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- // Copyright 2020 The Chromium 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 ANDROID_WEBVIEW_BROWSER_GFX_BEGIN_FRAME_SOURCE_WEBVIEW_H_
- #define ANDROID_WEBVIEW_BROWSER_GFX_BEGIN_FRAME_SOURCE_WEBVIEW_H_
- #include <memory>
- #include "base/android/scoped_java_ref.h"
- #include "base/callback.h"
- #include "base/callback_helpers.h"
- #include "base/memory/raw_ptr.h"
- #include "base/no_destructor.h"
- #include "components/power_scheduler/power_mode_voter.h"
- #include "components/viz/common/frame_sinks/begin_frame_source.h"
- #include "components/viz/service/frame_sinks/external_begin_frame_source_android.h"
- namespace android_webview {
- // The BeginFrameSourceWebView implements ExternalBeginFrameSource by observing
- // another begin_frame_source and provides AfterBeginFrame callback that called
- // after BeginFrame is sent out to all observers. It supports hierarchy
- // BeginFrameSourceWebView to provide AddBeginFrameCompletionCallback which will
- // be forwarded to root begin frame source to ensure that callbacks called after
- // all BeginFrames are sent.
- class BeginFrameSourceWebView : public viz::ExternalBeginFrameSource {
- public:
- BeginFrameSourceWebView();
- ~BeginFrameSourceWebView() override;
- // Sets parent of this BeginFrameSource
- void SetParentSource(BeginFrameSourceWebView* parent);
- bool inside_begin_frame() { return inside_begin_frame_; }
- // Schedules BeginFrame completion callback on root begin frame source.
- virtual void AddBeginFrameCompletionCallback(base::OnceClosure callback);
- // Returns last dispatched begin frame args.
- const viz::BeginFrameArgs& LastDispatchedBeginFrameArgs();
- protected:
- void ObserveBeginFrameSource(viz::BeginFrameSource* begin_frame_source);
- virtual void AfterBeginFrame() {}
- private:
- class BeginFrameObserver;
- class BeginFrameSourceClient : public viz::ExternalBeginFrameSourceClient {
- public:
- BeginFrameSourceClient(BeginFrameSourceWebView* owner);
- ~BeginFrameSourceClient();
- // ExternalBeginFrameSourceClient implementation.
- void OnNeedsBeginFrames(bool needs_begin_frames) override;
- private:
- const raw_ptr<BeginFrameSourceWebView> owner_;
- };
- void SendBeginFrame(const viz::BeginFrameArgs& args);
- void OnNeedsBeginFrames(bool needs_begin_frames);
- BeginFrameSourceClient bfs_client_;
- raw_ptr<viz::BeginFrameSource> observed_begin_frame_source_ = nullptr;
- raw_ptr<BeginFrameSourceWebView> parent_ = nullptr;
- std::unique_ptr<BeginFrameObserver> parent_observer_;
- bool inside_begin_frame_ = false;
- std::unique_ptr<power_scheduler::PowerModeVoter> animation_power_mode_voter_;
- };
- // RootBeginFrameSourceWebView is subclass of BeginFrameSourceWebView that
- // observes ExternalBeginFrameSourceAndroid to provide actual BeginFrames from
- // Android Choreographer and implements the logic of
- // AddBeginFrameCompletionCallback.
- class RootBeginFrameSourceWebView : public BeginFrameSourceWebView {
- public:
- static RootBeginFrameSourceWebView* GetInstance();
- void OnUpdateRefreshRate(JNIEnv* env,
- const base::android::JavaParamRef<jobject>& obj,
- float refresh_rate);
- // As this is implementation of root BeginFrameSourceWebView this is actual
- // implementation of scheduling callbacks.
- void AddBeginFrameCompletionCallback(base::OnceClosure callback) override;
- private:
- friend class base::NoDestructor<RootBeginFrameSourceWebView>;
- friend class BeginFrameSourceWebViewTest;
- RootBeginFrameSourceWebView();
- ~RootBeginFrameSourceWebView() override;
- void AfterBeginFrame() override;
- viz::ExternalBeginFrameSourceAndroid begin_frame_source_;
- std::vector<base::ScopedClosureRunner> after_begin_frame_callbacks_;
- base::android::ScopedJavaGlobalRef<jobject> j_object_;
- };
- } // namespace android_webview
- #endif // ANDROID_WEBVIEW_BROWSER_GFX_BEGIN_FRAME_SOURCE_WEBVIEW_H_
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