1// Copyright (c) 2012 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 PPAPI_PROXY_GAMEPAD_RESOURCE_H_
6#define PPAPI_PROXY_GAMEPAD_RESOURCE_H_
7
8#include "base/basictypes.h"
9#include "base/compiler_specific.h"
10#include "base/memory/scoped_ptr.h"
11#include "base/memory/shared_memory.h"
12#include "ppapi/c/ppb_gamepad.h"
13#include "ppapi/proxy/plugin_resource.h"
14#include "ppapi/proxy/ppapi_proxy_export.h"
15#include "ppapi/shared_impl/ppb_gamepad_shared.h"
16#include "ppapi/thunk/ppb_gamepad_api.h"
17
18struct PP_GamepadsSampleData;
19
20namespace base {
21class SharedMemory;
22}
23
24namespace ppapi {
25namespace proxy {
26
27// This class is a bit weird. It isn't a true resource from the plugin's
28// perspective. But we need to make requests to the browser and get replies.
29// It's more convenient to do this as a resource, so the instance just
30// maintains an internal lazily instantiated copy of this resource.
31class PPAPI_PROXY_EXPORT GamepadResource
32      : public PluginResource,
33        public thunk::PPB_Gamepad_API {
34 public:
35  GamepadResource(Connection connection, PP_Instance instance);
36  virtual ~GamepadResource();
37
38  // Resource implementation.
39  virtual thunk::PPB_Gamepad_API* AsPPB_Gamepad_API() OVERRIDE;
40
41  // PPB_Gamepad_API.
42  virtual void Sample(PP_Instance instance,
43                      PP_GamepadsSampleData* data) OVERRIDE;
44
45 private:
46  void OnPluginMsgSendMemory(const ResourceMessageReplyParams& params);
47
48  scoped_ptr<base::SharedMemory> shared_memory_;
49  const ContentGamepadHardwareBuffer* buffer_;
50
51  // Last data returned so we can use this in the event of a read failure.
52  PP_GamepadsSampleData last_read_;
53
54  DISALLOW_COPY_AND_ASSIGN(GamepadResource);
55};
56
57}  // namespace proxy
58}  // namespace ppapi
59
60#endif  // PPAPI_PROXY_GAMEPAD_RESOURCE_H_
61