content/renderer/gpu/compositor_external_begin_frame_source.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_RENDERER_GPU_COMPOSITOR_EXTERNAL_BEGIN_FRAME_SOURCE_H_
   6 #define CONTENT_RENDERER_GPU_COMPOSITOR_EXTERNAL_BEGIN_FRAME_SOURCE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "cc/scheduler/begin_frame_source.h"
  12 #include "content/renderer/gpu/compositor_forwarding_message_filter.h"
  13
  14 namespace IPC {
  15 class Message;
  16 class SyncMessageFilter;
  17 }
  18
  19 namespace content {
  20
  21 // This class can be created only on the main thread, but then becomes pinned
  22 // to a fixed thread where cc::Scheduler is running.
  23 class CompositorExternalBeginFrameSource
  24     : public cc::BeginFrameSourceBase,
  25       public NON_EXPORTED_BASE(base::NonThreadSafe) {
  26  public:
  27   explicit CompositorExternalBeginFrameSource(
  28       CompositorForwardingMessageFilter* filter,
  29       IPC::SyncMessageFilter* sync_message_filter,
  30       int routing_id);
  31   ~CompositorExternalBeginFrameSource() override;
  32
  33   // cc::BeginFrameSourceBase implementation.
  34   void OnNeedsBeginFramesChange(bool needs_begin_frames) override;
  35   void SetClientReady() override;
  36
  37  private:
  38   class CompositorExternalBeginFrameSourceProxy
  39       : public base::RefCountedThreadSafe<
  40                    CompositorExternalBeginFrameSourceProxy> {
  41    public:
  42     explicit CompositorExternalBeginFrameSourceProxy(
  43         CompositorExternalBeginFrameSource* begin_frame_source)
  44         : begin_frame_source_(begin_frame_source) {}
  45     void ClearBeginFrameSource() { begin_frame_source_ = NULL; }
  46     void OnMessageReceived(const IPC::Message& message) {
  47       if (begin_frame_source_)
  48         begin_frame_source_->OnMessageReceived(message);
  49     }
  50
  51    private:
  52     friend class base::RefCountedThreadSafe<
  53                      CompositorExternalBeginFrameSourceProxy>;
  54     virtual ~CompositorExternalBeginFrameSourceProxy() {}
  55
  56     CompositorExternalBeginFrameSource* begin_frame_source_;
  57
  58     DISALLOW_COPY_AND_ASSIGN(CompositorExternalBeginFrameSourceProxy);
  59   };
  60
  61   void OnMessageReceived(const IPC::Message& message);
  62
  63   void OnBeginFrame(const cc::BeginFrameArgs& args);
  64   bool Send(IPC::Message* message);
  65
  66   scoped_refptr<CompositorForwardingMessageFilter> begin_frame_source_filter_;
  67   scoped_refptr<CompositorExternalBeginFrameSourceProxy>
  68       begin_frame_source_proxy_;
  69   scoped_refptr<IPC::SyncMessageFilter> message_sender_;
  70   int routing_id_;
  71   CompositorForwardingMessageFilter::Handler begin_frame_source_filter_handler_;
  72
  73   DISALLOW_COPY_AND_ASSIGN(CompositorExternalBeginFrameSource);
  74 };
  75
  76 }  // namespace content
  77
  78 #endif  // CONTENT_RENDERER_GPU_COMPOSITOR_EXTERNAL_BEGIN_FRAME_SOURCE_H_