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- /*****************************************************************
- * fbext.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.
- *
- * 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
- * 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 =
- "$FBM fbext.c <1.0> 25-Jun-90 (C) 1989,1990 by Michael Mauldin, source \
- code available free from MLM@CS.CMU.EDU and from UUNET archives$";
- #endif
-
- main (argc, argv)
- char *argv[];
- { 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 '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);
- }
-