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// license:BSD-3-Clause
// copyright-holders:Nathan Woods, Miodrag Milanovic
/****************************************************************************

    printer.c

    Code for handling printer devices

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

#include "emu.h"
#include "printer.h"


// device type definition
DEFINE_DEVICE_TYPE(PRINTER, printer_image_device, "printer_image", "Printer")

//-------------------------------------------------
//  printer_image_device - constructor
//-------------------------------------------------

printer_image_device::printer_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
	device_t(mconfig, PRINTER, tag, owner, clock),
	device_image_interface(mconfig, *this),
	m_online_cb(*this)
{
}


//-------------------------------------------------
//  device_start - device-specific startup
//-------------------------------------------------

void printer_image_device::device_start()
{
	m_online_cb.resolve();
}

/***************************************************************************
    IMPLEMENTATION
***************************************************************************/

/*-------------------------------------------------
    printer_is_ready - checks to see if a printer
    is ready
-------------------------------------------------*/

int printer_image_device::is_ready()
{
	return exists() != 0;
}



/*-------------------------------------------------
    printer_output - outputs data to a printer
-------------------------------------------------*/

void printer_image_device::output(uint8_t data)
{
	if (exists())
	{
		fwrite(&data, 1);
	}
}

/*-------------------------------------------------
    DEVICE_IMAGE_CREATE( printer )
-------------------------------------------------*/

image_init_result printer_image_device::call_create(int format_type, util::option_resolution *format_options)
{
	return call_load();
}

/*-------------------------------------------------
    DEVICE_IMAGE_LOAD( printer )
-------------------------------------------------*/
image_init_result printer_image_device::call_load()
{
	/* send notify that the printer is now online */
	if (!m_online_cb.isnull())
		m_online_cb(true);

	/* we don't need to do anything special */
	return image_init_result::PASS;
}


/*-------------------------------------------------
    DEVICE_IMAGE_UNLOAD( printer )
-------------------------------------------------*/
void printer_image_device::call_unload()
{
	/* send notify that the printer is now offline */
	if (!m_online_cb.isnull())
		m_online_cb(false);
}