/* Copyright (C) 2001-2006 Artifex Software, Inc.
   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 that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/
/* $Id: gdev8510.c 8250 2007-09-25 13:31:24Z giles $*/
/*
 * C.Itoh M8510 printer driver for ghostscript.
 *
 * By Bob Smith <bob@snuffy.penfield.ny.us>
 */

#include "gdevprn.h"

/* The device descriptor */
static 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 ------ */

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

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

/* Send the page to the printer. */
static 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;
}

static 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);
}
