/* Copyright (C) 1996, 1997, 1999 Aladdin Enterprises.  All rights reserved.
  
  This file is part of AFPL Ghostscript.
  
  AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND.  No author or
  distributor accepts any responsibility for the consequences of using it, or
  for whether it serves any particular purpose or works at all, unless he or
  she says so in writing.  Refer to the Aladdin Free Public License (the
  "License") for full details.
  
  Every copy of AFPL Ghostscript must include a copy of the License, normally
  in a plain ASCII text file named PUBLIC.  The License grants you the right
  to copy, modify and redistribute AFPL Ghostscript, but only under certain
  conditions described in the License.  Among other things, the License
  requires that the copyright notice and this notice be preserved on all
  copies.
*/

/*$Id: gdevmiff.c,v 1.3 2001/08/01 00:48:23 stefan911 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;
}
