/* Copyright (C) 1990, 1992, 1993 Aladdin Enterprises.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id$*/
/*
 * 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);
const 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(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(pdev->memory, 8, line_size, "m8510_print_page(in1)");
	byte *in2 = (byte *) gs_malloc(pdev->memory, 8, line_size, "m8510_print_page(in2)");
	byte *out = (byte *) gs_malloc(pdev->memory, 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(pdev->memory, (char *) out, 8, line_size, "m8510_print_page(out)");
	if (in2) gs_free(pdev->memory, (char *) in2, 8, line_size, "m8510_print_page(in2)");
	if (in1) gs_free(pdev->memory, (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);
}