/* Copyright (C) 1993 Aladdin Enterprises.  All rights reserved.
  
  This file is part of GNU Ghostscript.
  
  GNU 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 GNU Ghostscript General Public License for full details.
  
*/

/* gdevcif.c */
/* The `Fake bitmapped device to estimate rendering time' 
   slightly modified to produce CIF files from PostScript.
   So anyone can put a nice logo free on its chip!
   Frederic Petrot, petrot@masi.ibp.fr */

#include "gdevprn.h"

/* Define the device parameters. */
#ifndef X_DPI
#  define X_DPI 72
#endif
#ifndef Y_DPI
#  define Y_DPI 72
#endif

/* The device descriptor */
private dev_proc_print_page(cif_print_page);
gx_device_printer far_data gs_cif_device =
  prn_device(prn_std_procs, "cif",
	DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
	X_DPI, Y_DPI,
	0,0,0,0,
	1, cif_print_page);

/* Send the page to the output. */
private int
cif_print_page(gx_device_printer *pdev, FILE *prn_stream)
{	int line_size = gdev_mem_bytes_per_scan_line((gx_device *)pdev);
	int lnum;
	byte *in = (byte *)gs_malloc(line_size, 1, "cif_print_page(in)");
	char *s;
	int scanline, scanbyte;
	int length, start; /* length is the number of successive 1 bits, */
			   /* start is the set of 1 bit start position */

	if (in == 0)
		return_error(gs_error_VMerror);

	if ((s = strchr(pdev->fname, '.')) == NULL)
		length = strlen(pdev->fname) + 1;
	else
		length = s - pdev->fname;
	s = (char *)gs_malloc(length, sizeof(char), "cif_print_page(s)");

	strncpy(s, pdev->fname, length);
	*(s + length) = '\0';
	fprintf(prn_stream, "DS1 25 1;\n9 %s;\nLCP;\n", s);
	gs_free(s, length, 1, "cif_print_page(s)");

   for (lnum = 0; lnum < pdev->height; lnum++) {   
      gdev_prn_copy_scan_lines(pdev, lnum, in, line_size);
      length = 0;
      for (scanline = 0; scanline < line_size; scanline++)
#ifdef TILE			/* original, simple, inefficient algorithm */
         for (scanbyte = 0; scanbyte < 8; scanbyte++)
            if (((in[scanline] >> scanbyte) & 1) != 0)
               fprintf(prn_stream, "B4 4 %d %d;\n",
                  (scanline * 8 + (7 - scanbyte)) * 4,
                  (pdev->height - lnum) * 4);
#else				/* better algorithm */
         for (scanbyte = 7; scanbyte >= 0; scanbyte--)
            /* cheap linear reduction of rectangles in lines */
            if (((in[scanline] >> scanbyte) & 1) != 0) {
               if (length == 0)
                  start = (scanline * 8 + (7 - scanbyte));
               length++;
            } else {
               if (length != 0)
                  fprintf(prn_stream, "B%d 4 %d %d;\n", length * 4,
                           start * 4 + length * 2,
                           (pdev->height - lnum) * 4);
               length = 0;
            }
#endif
   }
	fprintf(prn_stream, "DF;\nC1;\nE\n");
	gs_free(in, line_size, 1, "cif_print_page(in)");
	return 0;
}
