1// Copyright (c) 2011 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_GAMEPAD_SHARED_MEMORY_READER_H_
6#define CONTENT_RENDERER_GAMEPAD_SHARED_MEMORY_READER_H_
7
8#include "base/memory/scoped_ptr.h"
9#include "base/memory/shared_memory.h"
10#include "content/common/gamepad_messages.h"
11#include "content/public/renderer/renderer_gamepad_provider.h"
12#include "third_party/WebKit/public/platform/WebGamepads.h"
13
14namespace content {
15
16struct GamepadHardwareBuffer;
17
18class GamepadSharedMemoryReader : public RendererGamepadProvider {
19 public:
20  explicit GamepadSharedMemoryReader(RenderThread* thread);
21  virtual ~GamepadSharedMemoryReader();
22
23  // RendererGamepadProvider implementation.
24  virtual void SampleGamepads(
25      blink::WebGamepads& gamepads) OVERRIDE;
26  virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
27  virtual void Start(blink::WebPlatformEventListener* listener) OVERRIDE;
28
29 protected:
30  // PlatformEventObserver protected methods.
31  virtual void SendStartMessage() OVERRIDE;
32  virtual void SendStopMessage() OVERRIDE;
33
34 private:
35  void OnGamepadConnected(int index, const blink::WebGamepad& gamepad);
36  void OnGamepadDisconnected(int index, const blink::WebGamepad& gamepad);
37
38  base::SharedMemoryHandle renderer_shared_memory_handle_;
39  scoped_ptr<base::SharedMemory> renderer_shared_memory_;
40  GamepadHardwareBuffer* gamepad_hardware_buffer_;
41
42  bool ever_interacted_with_;
43
44  DISALLOW_COPY_AND_ASSIGN(GamepadSharedMemoryReader);
45};
46
47}  // namespace content
48
49#endif  // CONTENT_RENDERER_GAMEPAD_SHARED_MEMORY_READER_H_
50