godot/platform/osx/joystick_osx.h

/*************************************************************************/
/*  joystick_osx.h                                                     */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
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#ifndef JOYSTICKOSX_H
#define JOYSTICKOSX_H

#ifdef MACOS_10_0_4
#include <IOKit/hidsystem/IOHIDUsageTables.h>
#else
#include <Kernel/IOKit/hidsystem/IOHIDUsageTables.h>
#endif
#include <ForceFeedback/ForceFeedback.h>
#include <ForceFeedback/ForceFeedbackConstants.h>
#include <IOKit/hid/IOHIDLib.h>

#include "main/input_default.h"

struct rec_element {
	IOHIDElementRef ref;
	IOHIDElementCookie cookie;

	uint32_t usage;

	int min;
	int max;

	struct Comparator {
		bool operator()(const rec_element p_a, const rec_element p_b) const { return p_a.usage < p_b.usage; }
	};
};

struct joystick {
	IOHIDDeviceRef device_ref;

	Vector<rec_element> axis_elements;
	Vector<rec_element> button_elements;
	Vector<rec_element> hat_elements;

	int id;

	io_service_t ffservice; /* Interface for force feedback, 0 = no ff */
	FFCONSTANTFORCE ff_constant_force;
	FFDeviceObjectReference ff_device;
	FFEffectObjectReference ff_object;
	uint64_t ff_timestamp;
	LONG *ff_directions;
	FFEFFECT ff_effect;
	DWORD *ff_axes;

	void add_hid_elements(CFArrayRef p_array);
	void add_hid_element(IOHIDElementRef p_element);

	bool has_element(IOHIDElementCookie p_cookie, Vector<rec_element> *p_list) const;
	bool config_force_feedback(io_service_t p_service);
	bool check_ff_features();

	int get_hid_element_state(rec_element *p_element) const;

	void free();
	joystick();
};

class JoystickOSX {

	enum {
		JOYSTICKS_MAX = 16,
	};

private:
	InputDefault *input;
	IOHIDManagerRef hid_manager;

	Vector<joystick> device_list;

	bool have_device(IOHIDDeviceRef p_device) const;
	bool configure_joystick(IOHIDDeviceRef p_device_ref, joystick *p_joy);

	int get_joy_index(int p_id) const;

	void poll_joysticks() const;
	void setup_joystick_objects();
	void config_hid_manager(CFArrayRef p_matching_array) const;

	void joystick_vibration_start(int p_id, float p_magnitude, float p_duration, uint64_t p_timestamp);
	void joystick_vibration_stop(int p_id, uint64_t p_timestamp);

public:
	uint32_t process_joysticks(uint32_t p_last_id);

	void _device_added(IOReturn p_res, IOHIDDeviceRef p_device);
	void _device_removed(int p_id);

	JoystickOSX();
	~JoystickOSX();
};

#endif // JOYSTICKOSX_H