1// Copyright (C) 2011, Google Inc. All rights reserved. 2// 3// Redistribution and use in source and binary forms, with or without 4// modification, are permitted provided that the following conditions are met: 5// 6// 1. Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// 2. Redistributions in binary form must reproduce the above copyright 9// notice, this list of conditions and the following disclaimer in the 10// documentation and/or other materials provided with the distribution. 11// 12// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND 13// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15// ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE 16// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 18// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 19// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 22// DAMAGE. 23 24#ifndef WebGamepad_h 25#define WebGamepad_h 26 27#include "WebCommon.h" 28 29#if WEBKIT_IMPLEMENTATION 30#include <wtf/Assertions.h> 31#endif 32 33namespace WebKit { 34 35#pragma pack(push, 1) 36 37// This structure is intentionally POD and fixed size so that it can be shared 38// memory between hardware polling threads and the rest of the browser. See 39// also WebGamepads.h. 40class WebGamepad { 41public: 42 static const size_t idLengthCap = 128; 43 static const size_t axesLengthCap = 16; 44 static const size_t buttonsLengthCap = 32; 45 46 WebGamepad() 47 : connected(false) 48 , timestamp(0) 49 , axesLength(0) 50 , buttonsLength(0) 51 { 52 id[0] = 0; 53 } 54 55 // Is there a gamepad connected at this index? 56 bool connected; 57 58 // Device identifier (based on manufacturer, model, etc.). 59 WebUChar id[idLengthCap]; 60 61 // Monotonically increasing value referring to when the data were last 62 // updated. 63 unsigned long long timestamp; 64 65 // Number of valid entries in the axes array. 66 unsigned axesLength; 67 68 // Normalized values representing axes, in the range [-1..1]. 69 float axes[axesLengthCap]; 70 71 // Number of valid entries in the buttons array. 72 unsigned buttonsLength; 73 74 // Normalized values representing buttons, in the range [0..1]. 75 float buttons[buttonsLengthCap]; 76}; 77 78#if WEBKIT_IMPLEMENTATION 79COMPILE_ASSERT(sizeof(WebGamepad) == 465, WebGamepad_has_wrong_size); 80#endif 81 82#pragma pack(pop) 83 84} 85 86#endif // WebGamepad_h 87