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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/**********************************************************************

    Sega Master System "Light Phaser" (light gun) emulation

**********************************************************************/

#ifndef MAME_BUS_SMS_CTRL_LPHASER_H
#define MAME_BUS_SMS_CTRL_LPHASER_H

#pragma once


#include "smsctrl.h"



//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> sms_light_phaser_device

class sms_light_phaser_device : public device_t,
							public device_sms_control_port_interface
{
public:
	// construction/destruction
	sms_light_phaser_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);

	// optional information overrides
	virtual ioport_constructor device_input_ports() const override;

	DECLARE_READ_LINE_MEMBER( th_pin_r );
	DECLARE_INPUT_CHANGED_MEMBER( position_changed );

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;

	// device_sms_control_port_interface overrides
	virtual uint8_t peripheral_r() override;

private:
	required_ioport m_lphaser_pins;
	required_ioport m_lphaser_x;
	required_ioport m_lphaser_y;

	int m_sensor_last_state;
	emu_timer *m_lphaser_timer;

	TIMER_CALLBACK_MEMBER(sensor_check);
	int bright_aim_area(int lgun_x, int lgun_y );
	uint16_t screen_hpos_nonscaled(int scaled_hpos);
	uint16_t screen_vpos_nonscaled(int scaled_vpos);
};


// device type definition
DECLARE_DEVICE_TYPE(SMS_LIGHT_PHASER, sms_light_phaser_device)


#endif // MAME_BUS_SMS_CTRL_LPHASER_H