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fbm12s.lha
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fbext.c
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1994-07-18
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/*****************************************************************
* fbext.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.
*
* fbext.c:
*
* USAGE
* % fbext [ -w<width> -h<height> -W<maxwidth> -H<maxheight>
* -a<aspect> -t'title' -c'credits' ]
* [ x y width height ] < foo.fbm > bar.fbm
*
* EDITLOG
* LastEditDate = Mon Jun 25 00:02:18 1990 - Michael Mauldin
* LastFileName = /usr2/mlm/src/misc/fbm/fbext.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
*
* 20-May-89 Michael Mauldin (mlm) at Carnegie Mellon University
* Bug fix from Dave Cohrs <dave@cs.wisc.edu>
*
* 20-Apr-89 Michael Mauldin (mlm) at Carnegie Mellon University
* Beta release (version 0.91) mlm@cs.cmu.edu
*
* 22-Aug-88 Michael Mauldin (mlm) at Carnegie-Mellon University
* Created.
*****************************************************************/
# include <stdio.h>
# include <math.h>
# include "fbm.h"
int allowrot = 0;
# define USAGE \
"Usage: fbext [ -w<width> -h<height> ] [ -R ]\n\
[ -W<maxwdith> -H<maxheight> -s<size> ]\n\
[ -a<aspect> -t'title' -c'credits' ] [ -<type> ]\n\
[ x y [ width height ] ] < image > image"
#ifndef lint
static char *fbmid =
"$FBM fbext.c <1.2> 07-Apr-93 (C) 1989-1993 by Michael Mauldin, source \
code available free from MLM@CS.CMU.EDU and from UUNET archives$";
#endif
main (argc, argv)
char *argv[];
{ int xo = -1, yo = -1, w = -1, h = -1, ow = -1, oh = -1, size = -1;
int mh = -1, mw = -1;
double aspect = -1.0;
char title[FBM_MAX_TITLE], credits[FBM_MAX_TITLE];
FBM input, rotated, output, *image = &input;
int outtype = FMT_FBM;
/* Clear the memory pointers so alloc_fbm won't be confused */
input.cm = input.bm = (unsigned char *) NULL;
rotated.cm = rotated.bm = (unsigned char *) NULL;
output.cm = output.bm = (unsigned char *) NULL;
title[0] = '\0';
credits[0] = '\0';
/* Get the options */
while (--argc > 0 && (*++argv)[0] == '-')
{ while (*++(*argv))
{ switch (**argv)
{ case 't': strcpy (title, *argv+1); CLRARG; break;
case 'c': strcpy (credits, *argv+1); CLRARG; break;
case 'a': aspect = atof (*argv+1); SKIPARG; break;
case 'w': ow = atoi (*argv+1); SKIPARG; break;
case 'h': oh = atoi (*argv+1); SKIPARG; break;
case 'W': mw = atoi (*argv+1); SKIPARG; break;
case 'H': mh = atoi (*argv+1); SKIPARG; break;
case 'r': allowrot++; break;
case 's': size = atoi (*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 '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);
}
}
}
if (read_bitmap (&input, (char *) NULL))
{
if (image->hdr.physbits != 8)
{ fprintf (stderr,
"Can't handle images with %d bits and %d physbits per pixel\n",
image->hdr.bits, image->hdr.physbits);
exit (1);
}
/* Get arguments */
if (argc > 0) xo = atoi (argv[0]);
if (xo < 0) xo = 0;
if (argc > 1) yo = atoi (argv[1]);
if (yo < 0) yo = 0;
if (argc > 2) w = atoi (argv[2]);
if (w < 0) w = image->hdr.cols - xo;
if (argc > 3) h = atoi (argv[3]);
if (h < 0) h = image->hdr.rows - yo;
if (argc > 4) ow = atoi (argv[4]);
if (argc > 5) aspect = atof (argv[5]);
/* If 'allowrot' is on, rotate image if its fits better */
if (allowrot && mh > 0 && mw > 0)
{ int inhoriz=0, outhoriz=0;
if (aspect < 0.0) aspect = 1.0;
if (image->hdr.cols >= (image->hdr.aspect * image->hdr.rows)) inhoriz++;
if (mw >= (aspect * mh)) outhoriz++;
if (inhoriz != outhoriz)
{ if (rotate_fbm (image, &rotated, 90))
{ free (image);
image = &rotated;
fprintf (stderr, "Rotating [%dx%d] image for better fit [%dx%d]\n",
image->hdr.rows, image->hdr.cols, mw, mh);
}
}
else
{ exit (1); }
}
/* If max number of pixels specified, calculate width and height */
if (size > 0)
{ if (ow > 0 || oh > 0)
{ fprintf (stderr,
"fbext: error, can only specify one of size and width,height\n");
exit (1);
}
aspect = 1.0;
ow = sqrt ((double) size * w / (h * image->hdr.aspect));
ow &= ~7; /* Make width multiple of 8 */
oh = ow * image->hdr.aspect * h / w;
}
/* If given width and height, must determine output aspect */
if (aspect <= 0.0)
{ if (ow > 0 && oh > 0)
{ aspect = image->hdr.aspect * ow * h / (oh * w); }
else
{ aspect = image->hdr.aspect; }
}
/* If given only maximum sizes, assume largest width */
if (ow <= 0 && oh <= 0)
{ if (mw > 0) ow = mw;
else if (mh > 0) oh = mh;
}
/*
* If given one of width or height, calculate the other.
* If given only aspect ratio, inflate the smaller dimension
*/
if (ow > 0 && oh > 0)
{ /* Nothing to pick */ }
else if (ow <= 0 && oh > 0)
{ ow = ((double) oh + 0.5) * (aspect / image->hdr.aspect) * w / h; }
else if (ow > 0 && oh <= 0)
{ oh = ((double) ow + 0.5) * (image->hdr.aspect / aspect) * h / w; }
else if (aspect != image->hdr.aspect)
{ if (aspect > image->hdr.aspect)
{ oh = h;
ow = ((double) oh + 0.5) * (aspect / image->hdr.aspect) * w / h;
}
else
{ ow = w;
oh = ((double) ow + 0.5) * (input.hdr.aspect / aspect) * h / w;
}
}
else
{ ow = w; oh = h; }
/* If either dimension exceeds given maximums, shrink the image to fit */
if (mh > 0 && oh > mh)
{ ow = ow * mh / oh; oh = mh; }
/* Now extract the specified rectangle and write it out */
if (mw > 0 && ow > mw)
{ oh = oh * mw / ow; ow = mw; }
if (extract_fbm (&input, &output, xo, yo, w, h, ow, oh,
title[0] ? title : NULL,
credits[0] ? credits : NULL))
{ if (write_bitmap (&output, stdout, outtype)) exit (0); }
}
exit (1);
}