| // Copyright 2015 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 CONTENT_BROWSER_RENDERER_HOST_BEGIN_FRAME_OBSERVER_PROXY_H_ |
| #define CONTENT_BROWSER_RENDERER_HOST_BEGIN_FRAME_OBSERVER_PROXY_H_ |
| |
| #include "content/common/content_export.h" |
| #include "ui/compositor/compositor.h" |
| #include "ui/compositor/compositor_observer.h" |
| |
| namespace cc { |
| struct BeginFrameArgs; |
| } |
| |
| namespace content { |
| |
| // This is the interface from the BeginFrameObserverProxy which manages sending |
| // BeginFrame messages. |
| class BeginFrameObserverProxyClient { |
| public: |
| virtual void SendBeginFrame(const cc::BeginFrameArgs& args) = 0; |
| }; |
| |
| // This class is used to manage all of the RenderWidgetHostView state and |
| // functionality that is associated with BeginFrame message handling. |
| class CONTENT_EXPORT BeginFrameObserverProxy |
| : public ui::CompositorBeginFrameObserver { |
| public: |
| explicit BeginFrameObserverProxy(BeginFrameObserverProxyClient* client); |
| ~BeginFrameObserverProxy() override; |
| |
| void SetNeedsBeginFrames(bool needs_begin_frames); |
| |
| void SetCompositor(ui::Compositor* compositor); |
| void ResetCompositor(); |
| |
| // Overridden from ui::CompositorBeginFrameObserver: |
| void OnSendBeginFrame(const cc::BeginFrameArgs& args) override; |
| |
| private: |
| void StartObservingBeginFrames(); |
| void StopObservingBeginFrames(); |
| |
| // True when RenderWidget needs a BeginFrame message. |
| bool needs_begin_frames_; |
| |
| // Used whether to send begin frame to client or not. When |args| from |
| // Compositor is different from this, send to client. |
| cc::BeginFrameArgs last_sent_begin_frame_args_; |
| |
| BeginFrameObserverProxyClient* client_; |
| ui::Compositor* compositor_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BeginFrameObserverProxy); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_RENDERER_HOST_BEGIN_FRAME_OBSERVER_PROXY_H_ |