| /* |
| * Copyright (C) 2014 Apple 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. |
| */ |
| |
| #pragma once |
| |
| #if ENABLE(GAMEPAD) && PLATFORM(MAC) |
| |
| #include "PlatformGamepad.h" |
| #include <IOKit/hid/IOHIDDevice.h> |
| #include <wtf/HashMap.h> |
| #include <wtf/RetainPtr.h> |
| #include <wtf/UniqueRef.h> |
| |
| namespace WebCore { |
| |
| struct HIDGamepadElement { |
| WTF_MAKE_STRUCT_FAST_ALLOCATED; |
| HIDGamepadElement(double theMin, double theMax, IOHIDElementRef element) |
| : min(theMin) |
| , max(theMax) |
| , rawValue(theMin) |
| , iohidElement(element) |
| { |
| } |
| |
| virtual ~HIDGamepadElement() |
| { |
| } |
| |
| double min; |
| double max; |
| double rawValue; |
| RetainPtr<IOHIDElementRef> iohidElement; |
| |
| virtual bool isButton() const { return false; } |
| virtual bool isAxis() const { return false; } |
| virtual bool isDPad() const { return false; } |
| |
| virtual double normalizedValue() = 0; |
| }; |
| |
| struct HIDGamepadButton : HIDGamepadElement { |
| HIDGamepadButton(uint32_t thePriority, double min, double max, IOHIDElementRef element) |
| : HIDGamepadElement(min, max, element) |
| , priority(thePriority) |
| { |
| } |
| |
| uint32_t priority; |
| |
| bool isButton() const final { return true; } |
| |
| // Buttons normalize to the range (0.0) - (1.0) |
| double normalizedValue() override |
| { |
| return (rawValue - min) / (max - min); |
| } |
| }; |
| |
| struct HIDGamepadAxis : HIDGamepadElement { |
| HIDGamepadAxis(double min, double max, IOHIDElementRef element) |
| : HIDGamepadElement(min, max, element) |
| { |
| } |
| |
| bool isAxis() const final { return true; } |
| |
| // Axes normalize to the range (-1.0) - (1.0) |
| double normalizedValue() override |
| { |
| return (((rawValue - min) / (max - min)) * 2) - 1; |
| } |
| }; |
| |
| struct HIDGamepadDPad : HIDGamepadElement { |
| HIDGamepadDPad(double min, double max, IOHIDElementRef element) |
| : HIDGamepadElement(min, max, element) |
| { |
| } |
| |
| bool isDPad() const final { return true; } |
| |
| virtual double normalizedValue() { RELEASE_ASSERT_NOT_REACHED(); } |
| }; |
| |
| enum class HIDInputType { |
| ButtonPress, |
| NotAButtonPress, |
| }; |
| |
| class HIDGamepad : public PlatformGamepad { |
| public: |
| HIDGamepad(IOHIDDeviceRef, unsigned index); |
| |
| IOHIDDeviceRef hidDevice() const { return m_hidDevice.get(); } |
| |
| HIDInputType valueChanged(IOHIDValueRef); |
| |
| const Vector<double>& axisValues() const final { return m_axisValues; } |
| const Vector<double>& buttonValues() const final { return m_buttonValues; } |
| |
| private: |
| void initElements(); |
| void initElementsFromArray(CFArrayRef); |
| |
| bool maybeAddButton(IOHIDElementRef); |
| bool maybeAddDPad(IOHIDElementRef); |
| bool maybeAddAxis(IOHIDElementRef); |
| |
| void getCurrentValueForElement(const HIDGamepadElement&); |
| |
| RetainPtr<IOHIDDeviceRef> m_hidDevice; |
| |
| HashMap<IOHIDElementCookie, HIDGamepadElement*> m_elementMap; |
| |
| Vector<UniqueRef<HIDGamepadButton>> m_buttons; |
| Vector<UniqueRef<HIDGamepadAxis>> m_axes; |
| Vector<UniqueRef<HIDGamepadDPad>> m_dPads; |
| Vector<double> m_buttonValues; |
| Vector<double> m_axisValues; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(GAMEPAD) && PLATFORM(MAC) |