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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "content/renderer/gamepad_shared_memory_reader.h" | 5 #include "content/renderer/gamepad_shared_memory_reader.h" |
6 | 6 |
7 #include "base/debug/trace_event.h" | 7 #include "base/debug/trace_event.h" |
8 #include "base/metrics/histogram.h" | 8 #include "base/metrics/histogram.h" |
9 #include "content/common/gamepad_messages.h" | |
10 #include "content/common/gamepad_user_gesture.h" | 9 #include "content/common/gamepad_user_gesture.h" |
11 #include "content/public/renderer/render_thread.h" | 10 #include "content/public/renderer/render_thread.h" |
12 #include "content/common/gamepad_hardware_buffer.h" | 11 #include "content/common/gamepad_hardware_buffer.h" |
13 #include "ipc/ipc_sync_message_filter.h" | 12 #include "ipc/ipc_sync_message_filter.h" |
14 | 13 |
15 namespace content { | 14 namespace content { |
16 | 15 |
17 GamepadSharedMemoryReader::GamepadSharedMemoryReader() | 16 GamepadSharedMemoryReader::GamepadSharedMemoryReader( |
18 : gamepad_hardware_buffer_(NULL), | 17 const scoped_refptr<base::MessageLoopProxy>& io_message_loop) |
| 18 : io_message_loop_(io_message_loop), |
| 19 main_message_loop_(base::MessageLoopProxy::current()), |
| 20 gamepad_hardware_buffer_(NULL), |
| 21 gamepad_listener_(NULL), |
| 22 is_polling_(false), |
19 ever_interacted_with_(false) { | 23 ever_interacted_with_(false) { |
| 24 } |
| 25 |
| 26 bool GamepadSharedMemoryReader::EnsurePollingStarted() { |
| 27 if (is_polling_) |
| 28 return true; |
| 29 |
20 CHECK(RenderThread::Get()->Send(new GamepadHostMsg_StartPolling( | 30 CHECK(RenderThread::Get()->Send(new GamepadHostMsg_StartPolling( |
21 &renderer_shared_memory_handle_))); | 31 &renderer_shared_memory_handle_))); |
| 32 |
22 // If we don't get a valid handle from the browser, don't try to Map (we're | 33 // If we don't get a valid handle from the browser, don't try to Map (we're |
23 // probably out of memory or file handles). | 34 // probably out of memory or file handles). |
24 bool valid_handle = base::SharedMemory::IsHandleValid( | 35 bool valid_handle = base::SharedMemory::IsHandleValid( |
25 renderer_shared_memory_handle_); | 36 renderer_shared_memory_handle_); |
26 UMA_HISTOGRAM_BOOLEAN("Gamepad.ValidSharedMemoryHandle", valid_handle); | 37 UMA_HISTOGRAM_BOOLEAN("Gamepad.ValidSharedMemoryHandle", valid_handle); |
27 if (!valid_handle) | 38 if (!valid_handle) |
28 return; | 39 return false; |
| 40 |
29 renderer_shared_memory_.reset( | 41 renderer_shared_memory_.reset( |
30 new base::SharedMemory(renderer_shared_memory_handle_, true)); | 42 new base::SharedMemory(renderer_shared_memory_handle_, true)); |
31 CHECK(renderer_shared_memory_->Map(sizeof(GamepadHardwareBuffer))); | 43 CHECK(renderer_shared_memory_->Map(sizeof(GamepadHardwareBuffer))); |
32 void *memory = renderer_shared_memory_->memory(); | 44 void *memory = renderer_shared_memory_->memory(); |
33 CHECK(memory); | 45 CHECK(memory); |
34 gamepad_hardware_buffer_ = | 46 gamepad_hardware_buffer_ = |
35 static_cast<GamepadHardwareBuffer*>(memory); | 47 static_cast<GamepadHardwareBuffer*>(memory); |
| 48 |
| 49 is_polling_ = true; |
| 50 return true; |
36 } | 51 } |
37 | 52 |
38 void GamepadSharedMemoryReader::SampleGamepads(blink::WebGamepads& gamepads) { | 53 void GamepadSharedMemoryReader::SampleGamepads(blink::WebGamepads& gamepads) { |
| 54 if (!EnsurePollingStarted()) |
| 55 return; |
| 56 |
39 // ========== | 57 // ========== |
40 // DANGER | 58 // DANGER |
41 // ========== | 59 // ========== |
42 // | 60 // |
43 // This logic is duplicated in Pepper as well. If you change it, that also | 61 // This logic is duplicated in Pepper as well. If you change it, that also |
44 // needs to be in sync. See ppapi/proxy/gamepad_resource.cc. | 62 // needs to be in sync. See ppapi/proxy/gamepad_resource.cc. |
45 blink::WebGamepads read_into; | 63 blink::WebGamepads read_into; |
46 TRACE_EVENT0("GAMEPAD", "SampleGamepads"); | 64 TRACE_EVENT0("GAMEPAD", "SampleGamepads"); |
47 | 65 |
48 if (!base::SharedMemory::IsHandleValid(renderer_shared_memory_handle_)) | 66 if (!base::SharedMemory::IsHandleValid(renderer_shared_memory_handle_)) |
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81 // Clear the connected flag if the user hasn't interacted with any of the | 99 // Clear the connected flag if the user hasn't interacted with any of the |
82 // gamepads to prevent fingerprinting. The actual data is not cleared. | 100 // gamepads to prevent fingerprinting. The actual data is not cleared. |
83 // WebKit will only copy out data into the JS buffers for connected | 101 // WebKit will only copy out data into the JS buffers for connected |
84 // gamepads so this is sufficient. | 102 // gamepads so this is sufficient. |
85 for (unsigned i = 0; i < blink::WebGamepads::itemsLengthCap; i++) | 103 for (unsigned i = 0; i < blink::WebGamepads::itemsLengthCap; i++) |
86 gamepads.items[i].connected = false; | 104 gamepads.items[i].connected = false; |
87 } | 105 } |
88 } | 106 } |
89 } | 107 } |
90 | 108 |
| 109 void GamepadSharedMemoryReader::SetGamepadListener( |
| 110 blink::WebGamepadListener* listener) { |
| 111 gamepad_listener_ = listener; |
| 112 } |
| 113 |
91 GamepadSharedMemoryReader::~GamepadSharedMemoryReader() { | 114 GamepadSharedMemoryReader::~GamepadSharedMemoryReader() { |
92 RenderThread::Get()->Send(new GamepadHostMsg_StopPolling()); | 115 RenderThread::Get()->Send(new GamepadHostMsg_StopPolling()); |
93 } | 116 } |
94 | 117 |
| 118 bool GamepadSharedMemoryReader::OnMessageReceived(const IPC::Message& message) { |
| 119 DCHECK(io_message_loop_->BelongsToCurrentThread()); |
| 120 bool handled = true; |
| 121 IPC_BEGIN_MESSAGE_MAP(GamepadSharedMemoryReader, message) |
| 122 IPC_MESSAGE_HANDLER(GamepadMsg_GamepadConnected, OnGamepadConnected) |
| 123 IPC_MESSAGE_HANDLER(GamepadMsg_GamepadDisconnected, OnGamepadDisconnected) |
| 124 IPC_MESSAGE_UNHANDLED(handled = false) |
| 125 IPC_END_MESSAGE_MAP() |
| 126 return handled; |
| 127 } |
| 128 |
| 129 void GamepadSharedMemoryReader::OnGamepadConnected( |
| 130 const GamepadConnectionEventMessageParams& params) { |
| 131 int index = params.index; |
| 132 blink::WebGamepad gamepad; |
| 133 params.GetWebGamepad(&gamepad); |
| 134 |
| 135 // Dispatch on the main JS thread. |
| 136 main_message_loop_->PostTask( |
| 137 FROM_HERE, |
| 138 base::Bind(&GamepadSharedMemoryReader::DispatchGamepadConnected, this, |
| 139 index, gamepad)); |
| 140 } |
| 141 |
| 142 void GamepadSharedMemoryReader::OnGamepadDisconnected( |
| 143 const GamepadConnectionEventMessageParams& params) { |
| 144 int index = params.index; |
| 145 blink::WebGamepad gamepad; |
| 146 params.GetWebGamepad(&gamepad); |
| 147 |
| 148 // Dispatch on the main JS thread. |
| 149 main_message_loop_->PostTask( |
| 150 FROM_HERE, |
| 151 base::Bind(&GamepadSharedMemoryReader::DispatchGamepadDisconnected, this, |
| 152 index, gamepad)); |
| 153 } |
| 154 |
| 155 void GamepadSharedMemoryReader::DispatchGamepadConnected( |
| 156 int index, |
| 157 const blink::WebGamepad& gamepad) { |
| 158 if (gamepad_listener_) |
| 159 gamepad_listener_->onGamepadConnected(index, gamepad); |
| 160 } |
| 161 |
| 162 void GamepadSharedMemoryReader::DispatchGamepadDisconnected( |
| 163 int index, |
| 164 const blink::WebGamepad& gamepad) { |
| 165 if (gamepad_listener_) |
| 166 gamepad_listener_->onGamepadDisconnected(index, gamepad); |
| 167 } |
| 168 |
95 } // namespace content | 169 } // namespace content |
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