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Photo CD Demo 1
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fbmask.c
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1990-06-24
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/*****************************************************************
* fbmask.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.
*
* fbmask.c: Mask a rectangle with a value (or average)
*
* USAGE
* % fbmask [ flags ] arguments
*
* EDITLOG
* LastEditDate = Mon Jun 25 00:03:41 1990 - Michael Mauldin
* LastFileName = /usr2/mlm/src/misc/fbm/fbmask.c
*
* HISTORY
* 25-Jun-90 Michael Mauldin (mlm@cs.cmu.edu) Carnegie Mellon
* Package for Release 1.0
*
* 07-Mar-89 Michael Mauldin (mlm) at Carnegie Mellon University
* Beta release (version 0.9) mlm@cs.cmu.edu
*
* 29-Aug-88 Michael Mauldin (mlm) at Carnegie-Mellon University
* Created.
*****************************************************************/
# include <stdio.h>
# include <math.h>
# include "fbm.h"
# define USAGE "Usage: fbmask [ -<type> ] x0 y0 x1 y1 value < 8bit > 8bit"
#ifndef lint
static char *fbmid =
"$FBM fbmask.c <1.0> 25-Jun-90 (C) 1989,1990 by Michael Mauldin, source \
code available free from MLM@CS.CMU.EDU and from UUNET archives$";
#endif
main (argc, argv)
char *argv[];
{ FBM image;
register int j, i, val, rowlen;
int x1, x0, y1, y0, n;
int outtype = DEF_8BIT;
/* Clear the memory pointer so alloc_fbm won't be confused */
image.cm = image.bm = (unsigned char *) NULL;
/* Get the options */
while (--argc > 0 && (*++argv)[0] == '-')
{ while (*++(*argv))
{ switch (**argv)
{
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, "%s\n", USAGE);
exit (1);
}
}
}
/* Get arguments */
if (argc != 5)
{ fprintf (stderr, "%s\n", USAGE);
exit (1);
}
x0 = atoi (argv[0]);
y0 = atoi (argv[1]);
x1 = atoi (argv[2]);
y1 = atoi (argv[3]);
val = atoi (argv[4]);
/* Assure x0<x1 and y0<y1, swap if necessary */
if (x0 > x1) { n=x0; x0=x1; x1=n; }
if (y0 > y1) { n=y0; y0=y1; y1=n; }
if (read_bitmap (&image, (char *) NULL))
{
if (image.hdr.planes > 1 ||
image.hdr.clrlen > 0 ||
image.hdr.physbits != 8)
{ fprintf (stderr, "fbmask works only for 8bit grayscale files\n");
exit (1);
}
rowlen = image.hdr.rowlen;
for (j=y0; j<=y1; j++)
{ for (i=x0; i<=x1; i++)
{ image.bm[j*rowlen + i] = val; }
}
write_bitmap (&image, stdout, outtype);
}
else
{ exit (1); }
exit (0);
}