/* Copyright (C) 1996, 1997, 1999 Aladdin Enterprises.  All rights reserved.
  
  This file is part of GNU ghostscript

  GNU ghostscript is free software; you can redistribute it and/or modify it under
  the terms of the GNU General Public License as published by the Free Software
  Foundation; either version 2, or (at your option) any later version.

  GNU ghostscript is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with
  ghostscript; see the file COPYING. If not, write to the Free Software Foundation,
  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

*/

/* $Id: gdevmiff.c,v 1.4 2005/12/13 16:57:18 jemarch Exp $ */
/* MIFF file format driver */
#include "gdevprn.h"

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

/*
 * Default X and Y resolution.
 */
#define X_DPI 72
#define Y_DPI 72

private dev_proc_print_page(miff24_print_page);

private const gx_device_procs miff24_procs =
prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close,
		gx_default_rgb_map_rgb_color, gx_default_rgb_map_color_rgb);
const gx_device_printer gs_miff24_device =
prn_device(miff24_procs, "miff24",
	   DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
	   X_DPI, Y_DPI,
	   0, 0, 0, 0,		/* margins */
	   24, miff24_print_page);

/* Print one page in 24-bit RLE direct color format. */
private int
miff24_print_page(gx_device_printer * pdev, FILE * file)
{
    int raster = gx_device_raster((gx_device *) pdev, true);
    byte *line = gs_alloc_bytes(pdev->memory, raster, "miff line buffer");
    int y;
    int code = 0;		/* return code */

    if (line == 0)		/* can't allocate line buffer */
	return_error(gs_error_VMerror);
    fputs("id=ImageMagick\n", file);
    fputs("class=DirectClass\n", file);
    fprintf(file, "columns=%d\n", pdev->width);
    fputs("compression=RunlengthEncoded\n", file);
    fprintf(file, "rows=%d\n", pdev->height);
    fputs(":\n", file);
    for (y = 0; y < pdev->height; ++y) {
	byte *row;
	byte *end;

	code = gdev_prn_get_bits(pdev, y, line, &row);
	if (code < 0)
	    break;
	end = row + pdev->width * 3;
	while (row < end) {
	    int count = 0;

	    while (count < 255 && row < end - 3 &&
		   row[0] == row[3] && row[1] == row[4] &&
		   row[2] == row[5]
		)
		++count, row += 3;
	    putc(row[0], file);
	    putc(row[1], file);
	    putc(row[2], file);
	    putc(count, file);
	    row += 3;
	}
    }
    gs_free_object(pdev->memory, line, "miff line buffer");

    return code;
}
