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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_
#define PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_
#include <stddef.h>
#include "base/atomicops.h"
#include "base/strings/string16.h"
#include "ppapi/c/ppb_gamepad.h"
#include "ppapi/shared_impl/ppapi_shared_export.h"
namespace ppapi {
// TODO(brettw) when we remove the non-IPC-based gamepad implementation, this
// code should all move into the GamepadResource.
#pragma pack(push, 1)
struct WebKitGamepadButton {
bool pressed;
double value;
};
// This must match the definition of blink::Gamepad. The GamepadHost unit test
// has some compile asserts to validate this.
struct WebKitGamepad {
static const size_t kIdLengthCap = 128;
static const size_t kMappingLengthCap = 16;
static const size_t kAxesLengthCap = 16;
static const size_t kButtonsLengthCap = 32;
// Is there a gamepad connected at this index?
bool connected;
// Device identifier (based on manufacturer, model, etc.).
base::char16 id[kIdLengthCap];
// Monotonically increasing value referring to when the data were last
// updated.
unsigned long long timestamp;
// Number of valid entries in the axes array.
unsigned axes_length;
// Normalized values representing axes, in the range [-1..1].
double axes[kAxesLengthCap];
// Number of valid entries in the buttons array.
unsigned buttons_length;
// Normalized values representing buttons, in the range [0..1].
WebKitGamepadButton buttons[kButtonsLengthCap];
// Mapping type (for example "standard")
base::char16 mapping[kMappingLengthCap];
};
// This must match the definition of blink::Gamepads. The GamepadHost unit
// test has some compile asserts to validate this.
struct WebKitGamepads {
static const size_t kItemsLengthCap = 4;
// Number of valid entries in the items array.
unsigned length;
// Gamepad data for N separate gamepad devices.
WebKitGamepad items[kItemsLengthCap];
};
// This is the structure store in shared memory. It must match
// content/common/gamepad_hardware_buffer.h. The GamepadHost unit test has
// some compile asserts to validate this.
struct ContentGamepadHardwareBuffer {
base::subtle::Atomic32 sequence;
WebKitGamepads buffer;
};
#pragma pack(pop)
PPAPI_SHARED_EXPORT void ConvertWebKitGamepadData(
const WebKitGamepads& webkit_data,
PP_GamepadsSampleData* output_data);
} // namespace ppapi
#endif // PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_
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