/* Copyright (C) 1990, 1992, 1993 Aladdin Enterprises.  All rights reserved.

This file is part of Ghostscript.

Ghostscript is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY.  No author or distributor accepts responsibility
to anyone for the consequences of using it or for whether it serves any
particular purpose or works at all, unless he says so in writing.  Refer
to the Ghostscript General Public License for full details.

Everyone is granted permission to copy, modify and redistribute
Ghostscript, but only under the conditions described in the Ghostscript
General Public License.  A copy of this license is supposed to have been
given to you along with Ghostscript so you can know your rights and
responsibilities.  It should be in a file named COPYING.  Among other
things, the copyright notice and this notice must be preserved on all
copies.  */

/*
 * gdev8510.c
 *
 * C.Itoh M8510 printer driver for ghostscript.
 * by Bob Smith <bob@snuffy.penfield.ny.us>
 */

#include "gdevprn.h"

/* The device descriptor */
private dev_proc_print_page(m8510_print_page);
gx_device_printer far_data gs_m8510_device =
	prn_device(prn_std_procs, "m8510",
		85,				/* width_10ths, 8.5" */
		110,				/* height_10ths, 11" */
		160,				/* x_dpi */
		144,				/* y_dpi */
		0,0,0.5,0,			/* left, bottom, right, and top margins */
		1, m8510_print_page);

/* ------ forward declarations ------ */

private void m8510_output_run(P4(gx_device_printer *pdev,
	byte *out, int pass, FILE *prn_stream));

/* ------ internal routines ------ */

/* Send the page to the printer. */
private int
m8510_print_page(gx_device_printer *pdev, FILE *prn_stream)
{
	int line_size = gdev_mem_bytes_per_scan_line((gx_device *)pdev);
	byte *in1 = (byte *) gs_malloc(8, line_size, "m8510_print_page(in1)");
	byte *in2 = (byte *) gs_malloc(8, line_size, "m8510_print_page(in2)");
	byte *out = (byte *) gs_malloc(8, line_size, "m8510_print_page(out)");
	int lnum = 0;
	int code = 0;
	byte *inp, *in_end, *outp;
	int i;

	if (in1 == 0 || in2 == 0 || out == 0) {
		code = gs_error_VMerror;
		gs_note_error(code);
		goto out;
	}

	/*
	 * Initialize the printer.
	 * NLQ mode, proportional print (160x144 dpi).
	 * and 16/144" linefeeds.
	 */
	fwrite("\033m2\033P\033T16", 1, 9, prn_stream);

	/* Transfer pixels to printer */
	while ( lnum < pdev->height ) {
		/* get a raster */
		for (i = 7; i >= 0; i--) {
			gdev_prn_copy_scan_lines(pdev, lnum, &in1[i*line_size], line_size);
			lnum++;
			gdev_prn_copy_scan_lines(pdev, lnum, &in2[i*line_size], line_size);
			lnum++;
		}

		/* Transpose the 1st pass of data. */
		in_end = in1 + line_size;
		for (inp = in1, outp = out; inp < in_end; inp++, outp += 8)
			gdev_prn_transpose_8x8(inp, line_size, outp, 1);

		/* send the 1st line */
		m8510_output_run(pdev, out, 0, prn_stream);

		/* Transpose the 2nd pass of data. */
		in_end = in2 + line_size;
		for (inp = in2, outp = out; inp < in_end; inp++, outp += 8)
			gdev_prn_transpose_8x8(inp, line_size, outp, 1);

		/* send the 2nd line */
		m8510_output_run(pdev, out, 1, prn_stream);
	}

	/* reset the printer. */
	fwrite("\033c1", 1, 3, prn_stream);
	fflush(prn_stream);

out:;
	if (out) gs_free((char *) out, 8, line_size, "m8510_print_page(out)");
	if (in2) gs_free((char *) in2, 8, line_size, "m8510_print_page(in2)");
	if (in1) gs_free((char *) in1, 8, line_size, "m8510_print_page(in1)");

	return code;
}

private void
m8510_output_run(gx_device_printer *pdev,
	byte *out, int pass, FILE *prn_stream)
{
	byte *out_end = out + pdev->width;
	char tmp[10];
	int count;

	/*
	 * Remove trailing 0s.
	 * out must be a multiple of 8 bytes.
	 */
	while (out_end > out
		&& out_end[-1] == 0
		&& out_end[-2] == 0
		&& out_end[-3] == 0
		&& out_end[-4] == 0
		&& out_end[-5] == 0
		&& out_end[-6] == 0
		&& out_end[-7] == 0
		&& out_end[-8] == 0)
			out_end -= 8;

	/* Transfer the line of data. */
	count = out_end - out;
	if (count) {
		sprintf(tmp, "\033g%03d", count/8);
		fwrite(tmp, 1, 5, prn_stream);
		fwrite(out, 1, count, prn_stream);
		fwrite("\r", 1, 1, prn_stream);
	}

	if (pass) fwrite("\n", 1, 1, prn_stream);
}
