// Copyright (C) 2011, Google Inc. All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // 1. Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // 2. Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the distribution. // // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE // ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH // DAMAGE. #ifndef WebGamepad_h #define WebGamepad_h #include "WebCommon.h" #if BLINK_IMPLEMENTATION #include "wtf/Assertions.h" #endif namespace blink { #pragma pack(push, 1) class WebGamepadButton { public: WebGamepadButton() : pressed(false) , value(0.f) { } WebGamepadButton(bool pressed, float value) : pressed(pressed) , value(value) { } bool pressed; float value; }; // This structure is intentionally POD and fixed size so that it can be shared // memory between hardware polling threads and the rest of the browser. See // also WebGamepads.h. class WebGamepad { public: static const size_t idLengthCap = 128; static const size_t mappingLengthCap = 16; static const size_t axesLengthCap = 16; static const size_t buttonsLengthCap = 32; WebGamepad() : connected(false) , timestamp(0) , axesLength(0) , buttonsLength(0) { id[0] = 0; mapping[0] = 0; } // Is there a gamepad connected at this index? bool connected; // Device identifier (based on manufacturer, model, etc.). WebUChar id[idLengthCap]; // Monotonically increasing value referring to when the data were last // updated. unsigned long long timestamp; // Number of valid entries in the axes array. unsigned axesLength; // Normalized values representing axes, in the range [-1..1]. float axes[axesLengthCap]; // Number of valid entries in the buttons array. unsigned buttonsLength; // Button states WebGamepadButton buttons[buttonsLengthCap]; // Mapping type (for example "standard") WebUChar mapping[mappingLengthCap]; }; #if BLINK_IMPLEMENTATION COMPILE_ASSERT(sizeof(WebGamepad) == 529, WebGamepad_has_wrong_size); #endif #pragma pack(pop) } #endif // WebGamepad_h