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fbm12s.lha
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fbpalet.c
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1994-07-18
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/*****************************************************************
* fbpalet.c: FBM Release 1.2 07-Apr-93 Michael Mauldin
*
* Copyright (C) 1989-1993 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.
*
* fbpalet.c: Replace one image's color map with another image's.
* The color index plane is not modifed by this action.
*
* Includes option for removing duplicates. That is
* Suppose both color 1 and color 127 are both <0,0,0>
* (pure black)...with the -d option, all uses of color
* 127 get converted to color 1. The colormap is not
* modified by this action.
*
* USAGE
* % fbpalet < image1 > image2
*
* EDITLOG
* LastEditDate = Mon Jun 25 00:03:55 1990 - Michael Mauldin
* LastFileName = /usr2/mlm/src/misc/fbm/fbpalet.c
*
* HISTORY
* 07-Apr-93 Michael Mauldin (mlm) at Carnegie-Mellon University
* Added -J switch
*
* 25-Jun-90 Michael Mauldin (mlm@cs.cmu.edu) Carnegie Mellon
* Package for Release 1.0
*
* 01-May-90 Michael Mauldin (mlm) at Carnegie-Mellon University
* Created.
*****************************************************************/
# include <stdio.h>
# include <math.h>
# include "fbm.h"
# define USAGE \
"Usage: fbpalet [ -m<mapname ] [ -d ] [ -<type> ] < image > image"
#ifndef lint
static char *fbmid =
"$FBM fbpalet.c <1.2> 07-Apr-93 (C) 1989-1993 by Michael Mauldin, source \
code available free from MLM@CS.CMU.EDU and from UUNET archives$";
#endif
int debug = 0;
int removedup = 0;
double expon = 1.0;
main (argc, argv)
char *argv[];
{ FBM image;
FBM mapimage;
int outtype = DEF_8BIT;
char *fname = NULL;
char *mapname = NULL;
/* Get the options */
while (--argc > 0 && (*++argv)[0] == '-')
{ while (*++(*argv))
{ switch (**argv)
{
case 'D': debug++; break;
case 'd': removedup++; break;
case 'm': mapname = *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 'J': outtype = FMT_JPEG; break;
case 'L': outtype = FMT_LEAF; break;
case 'M': outtype = FMT_MCP; break;
case 'P': outtype = FMT_PBM; 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);
}
}
}
/* Clear the memory pointers so alloc_fbm won't be confused */
image.cm = image.bm = (unsigned char *) NULL;
mapimage.cm = mapimage.bm = (unsigned char *) NULL;
/* Read the image */
if (read_bitmap (&image, fname))
{
if (image.hdr.planes == 1 && image.hdr.clrlen == 0)
{ fprintf (stderr, "fbpalet only works on color images\n");
}
/* Read the mapimage */
if (mapname && read_bitmap (&mapimage, mapname))
{
if (mapimage.hdr.planes == 1 && mapimage.hdr.clrlen == 0)
{ fprintf (stderr, "fbpalet only works on mapped color images\n");
exit (0);
}
if (dup_clr (&mapimage, &image) &&
write_bitmap (&image, stdout, outtype))
{ exit (0); }
}
/* Still call dup_clr to transform duplicate colors */
else if (mapname == NULL)
{ if (dup_clr (NULL, &image) &&
write_bitmap (&image, stdout, outtype))
{ exit (0); }
}
}
exit (1);
}
/****************************************************************
* dup_clr: Copy colormap from input to output
* Duplicates are removed, even if input image is NULL.
****************************************************************/
dup_clr (input, output)
FBM *input, *output;
{ register int i, j, clrlen;
register unsigned char *ic, *oc;
unsigned char *r, *g, *b;
unsigned char cmap[256];
int changes = 0, colors;
/*-------- First copy over the new colormap --------*/
if (input)
{ clrlen = input->hdr.clrlen;
/* If output image has another color map, free the old one */
if (output->hdr.clrlen != input->hdr.clrlen)
{ if (output->hdr.clrlen > input->hdr.clrlen)
{ fprintf (stderr,
"fbpalet: warning, new color map is smaller (%d vs %d)\n",
input->hdr.clrlen, output->hdr.clrlen);
}
if (output->hdr.clrlen > 0) free (output->cm);
output->cm = (unsigned char *) malloc (input->hdr.clrlen);
}
/* Replace colormap */
output->hdr.clrlen = clrlen;
ic = input->cm;
oc = output->cm;
for (i=0; i < clrlen; i++)
{ *oc++ = *ic++; }
}
/*-------- Now map duplicate colors to lowest index --------*/
if (!removedup) return (1);
clrlen = output->hdr.clrlen;
colors = clrlen / 3;
/* CMAP will compute transform of body of image */
for (i=0; i<colors; i++) { cmap[i] = i; }
r = output->cm;
g = r + colors;
b = g + colors;
for (i=1; i<colors; i++)
{ for (j=0; j<i; j++)
{ if (r[i] == r[j] && g[i] == g[j] && b[i] == b[j])
{ cmap[i] = j;
if (debug)
{ fprintf (stderr, "Dup: %3d -> %3d <%3d,%3d,%3d>\n",
i, j, r[i], g[i], b[i]);
}
changes++;
break;
}
}
}
if (changes)
{ fprintf (stderr, "fbpalet: %d duplicated colormap entries\n", changes); }
/* Change indices of duplicated colors */
if (changes)
{ ic = output->bm;
oc = ic + output->hdr.plnlen * output->hdr.planes;
for (; ic<oc; ic++)
{ *ic = cmap[*ic]; }
}
return (1);
}