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_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_ 6#define PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_ 7 8#include "base/atomicops.h" 9#include "base/strings/string16.h" 10#include "ppapi/c/ppb_gamepad.h" 11#include "ppapi/shared_impl/ppapi_shared_export.h" 12 13namespace ppapi { 14 15// TODO(brettw) when we remove the non-IPC-based gamepad implementation, this 16// code should all move into the GamepadResource. 17 18#pragma pack(push, 1) 19 20// This must match the definition of blink::Gamepad. The GamepadHost unit test 21// has some compile asserts to validate this. 22struct WebKitGamepad { 23 static const size_t kIdLengthCap = 128; 24 static const size_t kAxesLengthCap = 16; 25 static const size_t kButtonsLengthCap = 32; 26 27 // Is there a gamepad connected at this index? 28 bool connected; 29 30 // Device identifier (based on manufacturer, model, etc.). 31 char16 id[kIdLengthCap]; 32 33 // Monotonically increasing value referring to when the data were last 34 // updated. 35 unsigned long long timestamp; 36 37 // Number of valid entries in the axes array. 38 unsigned axes_length; 39 40 // Normalized values representing axes, in the range [-1..1]. 41 float axes[kAxesLengthCap]; 42 43 // Number of valid entries in the buttons array. 44 unsigned buttons_length; 45 46 // Normalized values representing buttons, in the range [0..1]. 47 float buttons[kButtonsLengthCap]; 48}; 49 50// This must match the definition of blink::Gamepads. The GamepadHost unit 51// test has some compile asserts to validate this. 52struct WebKitGamepads { 53 static const size_t kItemsLengthCap = 4; 54 55 // Number of valid entries in the items array. 56 unsigned length; 57 58 // Gamepad data for N separate gamepad devices. 59 WebKitGamepad items[kItemsLengthCap]; 60}; 61 62// This is the structure store in shared memory. It must match 63// content/common/gamepad_hardware_buffer.h. The GamepadHost unit test has 64// some compile asserts to validate this. 65struct ContentGamepadHardwareBuffer { 66 base::subtle::Atomic32 sequence; 67 WebKitGamepads buffer; 68}; 69 70#pragma pack(pop) 71 72PPAPI_SHARED_EXPORT void ConvertWebKitGamepadData( 73 const WebKitGamepads& webkit_data, 74 PP_GamepadsSampleData* output_data); 75 76} // namespace ppapi 77 78#endif // PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_ 79