Gamepad.h

// Copyright 2022 ShenMian
// License(Apache-2.0)
 
#pragma once
 
#include <filesystem>
#include <functional>
#include <math/math.hpp>
#include <string_view>
 
class Gamepad
{
public:
    using handle_type = unsigned short;
 
    enum class Thumb;
    enum class Trigger;
    enum class Button : uint8_t;
 
    Gamepad(handle_type handle = 0);
 
    ~Gamepad();
 
    void update();
 
    Vector2f get(Thumb thumb) const noexcept;
 
    Vector2f get_raw(Thumb thumb) const noexcept;
 
    float get(Trigger trigger) const noexcept;
 
    float get_raw(Trigger trigger) const noexcept;
 
    bool get(Button button) const noexcept;
 
    void set_vibration(float leftSpeed, float rightSpeed);
 
    std::string_view get_name() const;
 
    bool is_connected() const;
 
    bool load_mappings_db(const std::filesystem::path& path);
 
    bool operator==(const Gamepad&) const;
 
    static void init();
    static void deinit();
 
private:
    handle_type handle_;
 
    float left_thumb_deadzone_  = 0.1f;
    float right_thumb_deadzone_ = 0.1f;
    float trigger_threshold_   = 0.01f;
 
    unsigned char buttons_[15] = {};
    float         axes_[6]     = {};
};
 
enum class Gamepad::Thumb
{
    left,
    right
};
 
enum class Gamepad::Trigger
{
    left, 
    right 
};
 
enum class Gamepad::Button : uint8_t
{
    A = 0,
    B = 1,
    X = 2,
    Y = 3,
 
    LeftBumper  = 4,
    RightBumper = 5,
 
    Back  = 6,
    Start = 7,
    Guide = 8,
 
    LeftThumb  = 9,
    RightThumb = 10,
 
    DPAD_Up    = 11,
    DPAD_Right = 12,
    DPAD_Down  = 13,
    DPAD_Left  = 14,
 
    Cross    = A,
    Circle   = B,
    Square   = X,
    Triangle = Y
};