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- /*****************************************************************
- * fbsample.c: FBM Release 1.0 25-Feb-90 Michael Mauldin
- *
- * Copyright (C) 1989,1990 by Michael Mauldin. Permission is granted
- * to use this file in whole or in part for any purpose, educational,
- * recreational or commercial, provided that this copyright notice
- * is retained unchanged. This software is available to all free of
- * charge by anonymous FTP and in the UUNET archives.
- *
- * fbsample.c: 1 bit to 8 bit conversion by sampling
- *
- * USAGE
- * % fbsample [ title ] < foo.pbm > foo.fbm
- *
- * EDITLOG
- * LastEditDate = Mon Jun 25 00:04:36 1990 - Michael Mauldin
- * LastFileName = /usr2/mlm/src/misc/fbm/fbsample.c
- *
- * HISTORY
- * 25-Jun-90 Michael Mauldin (mlm@cs.cmu.edu) Carnegie Mellon
- * Package for Release 1.0
- *
- * 20-May-89 Michael Mauldin (mlm) at Carnegie Mellon University
- * Bug fix from Dave Cohrs <dave@cs.wisc.edu>
- *
- * 07-Mar-89 Michael Mauldin (mlm) at Carnegie Mellon University
- * Beta release (version 0.9) mlm@cs.cmu.edu
- *
- * 5-Sep-88 Michael Mauldin (mlm) at Carnegie-Mellon University
- * Created.
- *****************************************************************/
-
- #include <stdio.h>
- #include <ctype.h>
- #include "fbm.h"
-
- int width, height;
-
- # define USAGE \
- "fbsample [ -t'title' -c'credits' -g'grain' -n'nbr' ]\n\
- [ -<type> ] < bitmap > image"
-
- #ifndef lint
- static char *fbmid =
- "$FBM fbsample.c <1.0> 25-Jun-90 (C) 1989,1990 by Michael Mauldin, source \
- code available free from MLM@CS.CMU.EDU and from UUNET archives$";
- #endif
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- char *title = NULL, *credits = NULL;
- register unsigned char *bmp;
- register int i, j, r, c, irow, orow, grain=5, nbr=5, sum;
- int outtype = DEF_1BIT;
- FBM input, output;
-
- /* Clear the memory pointers so alloc_fbm won't be confused */
- input.cm = input.bm = (unsigned char *) NULL;
- output.cm = output.bm = (unsigned char *) NULL;
-
- /* Get the options */
- while (--argc > 0 && (*++argv)[0] == '-')
- { while (*++(*argv))
- { switch (**argv)
- { case 'g': grain = atoi (*argv+1); SKIPARG; break;
- case 'n': nbr = atoi (*argv+1); SKIPARG; break;
- case 't': title = *argv+1; SKIPARG; break;
- case 'c': credits = *argv+1; SKIPARG; break;
- case 'A': outtype = FMT_ATK; break;
- case 'B': outtype = FMT_FACE; break;
- case 'F': outtype = FMT_FBM; break;
- case 'G': outtype = FMT_GIF; break;
- case 'I': outtype = FMT_IFF; break;
- case 'L': outtype = FMT_LEAF; break;
- case 'M': outtype = FMT_MCP; break;
- case 'P': outtype = FMT_PBM; break;
- case 'R': outtype = FMT_RLE; break;
- case 'S': outtype = FMT_SUN; break;
- case 'T': outtype = FMT_TIFF; break;
- case 'X': outtype = FMT_X11; break;
- case 'Z': outtype = FMT_PCX; break;
- default: fprintf (stderr, "Usage: %s\n", USAGE);
- exit (1);
- }
- }
- }
-
- if (grain < 1 || grain > 16)
- { fprintf (stderr,
- "Usage: %s\n%s\n",
- " (grain must be between 1 and 16)\n");
- exit (0);
- }
-
- /* Read pbm bitmap */
- if (! read_bitmap (&input, (char *) NULL))
- { fprintf (stderr, "%s: input garbled or not in PBM format\n", argv[0]);
- exit(1);
- }
-
- if (title == NULL && input.hdr.title[0])
- { title = input.hdr.title; }
-
- if (grain > 1)
- { width = input.hdr.cols / grain;
- height = input.hdr.rows / grain;
- }
- else
- { width = input.hdr.cols - grain + 1;
- height = input.hdr.rows - grain + 1;
- }
-
- orow = 2 * ((width * 8 + 15) / 16);
- irow = input.hdr.rowlen;
-
- fprintf (stderr, "Sample (1bit to 8bit) \"%s\": [%dx%dx1] ==> [%dx%dx8]\n",
- title ? title : "(untitled)",
- input.hdr.cols, input.hdr.rows, width, height);
-
- /* Set up output header */
- output.hdr.cols = width;
- output.hdr.rows = height;
- output.hdr.planes = 1;
- output.hdr.bits = 8;
- output.hdr.physbits = 8;
- output.hdr.rowlen = orow;
- output.hdr.plnlen = orow * height;
- output.hdr.aspect = 1.0;
- output.hdr.clrlen = 0;
-
- if (title) strcpy (output.hdr.title, title);
- if (credits) strcpy (output.hdr.credits, credits);
-
- alloc_fbm (&output);
-
- fprintf (stderr, "width %d, height %d, grain %d, nbr %d, irow %d, orow %d\n",
- width, height, grain, nbr, irow, orow);
-
- for (r=0; r<height; r++)
- { for (c=0; c<width; c++)
- { sum = 0;
- bmp = &(input.bm[(r*grain) * irow + (c*grain)]);
-
- for (j=0; j<nbr; j++, bmp += irow)
- { for (i=0; i<nbr; i++)
- { if (bmp[i]) sum++; }
- }
-
- if (sum > 255) sum = 255;
-
- output.bm[r * orow + c] = sum;
- }
- }
-
- write_bitmap (&output, stdout, outtype);
-
- exit (0);
- }
-