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// 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 WEBKIT_IMPLEMENTATION
#include <wtf/Assertions.h>
#endif
namespace WebKit {
#pragma pack(push, 1)
// 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 axesLengthCap = 16;
static const size_t buttonsLengthCap = 32;
WebGamepad()
: connected(false)
, timestamp(0)
, axesLength(0)
, buttonsLength(0)
{
id[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;
// Normalized values representing buttons, in the range [0..1].
float buttons[buttonsLengthCap];
};
#if WEBKIT_IMPLEMENTATION
COMPILE_ASSERT(sizeof(WebGamepad) == 465, WebGamepad_has_wrong_size);
#endif
#pragma pack(pop)
}
#endif // WebGamepad_h
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