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fbm12s.lha
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flalfb.c
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C/C++ Source or Header
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1994-07-18
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/*****************************************************************
* flalfb.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.
*
* flalfb.c: Fuzzy bitmap allocation
*
* CONTENTS
* alloc_fbm (image)
* free_fbm (image)
*
* EDITLOG
* LastEditDate = Mon Jun 25 00:04:43 1990 - Michael Mauldin
* LastFileName = /usr2/mlm/src/misc/fbm/flalfb.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
*
* 12-Nov-88 Michael Mauldin (mlm) at Carnegie-Mellon University
* Created.
*****************************************************************/
# include <stdio.h>
# include <math.h>
# include <ctype.h>
# include "fbm.h"
/****************************************************************
* alloc_fbm: Allocate enough bytes for the bitmap and colormap
* of an image where the header has already been filled in.
****************************************************************/
#ifndef lint
static char *fbmid =
"$FBM flalfb.c <1.0> 25-Jun-90 (C) 1989,1990 by Michael Mauldin, source \
code available free from MLM@CS.CMU.EDU and from UUNET archives$";
#endif
alloc_fbm (image)
FBM *image;
{ unsigned bmsize, cmsize;
if (! free_fbm (image)) return (0);
/* Calculate bytes needed */
bmsize = (image->hdr.planes * image->hdr.plnlen);
cmsize = image->hdr.clrlen;
if (! (image->bm = (unsigned char *) malloc (bmsize)) ||
(cmsize && ! (image->cm = (unsigned char *) malloc (cmsize))))
{ perror ("alloc_fbm"); exit (1); }
return (1);
}
/****************************************************************
* free_fbm: Free the storage allocate by alloc_fbm
****************************************************************/
free_fbm (image)
FBM *image;
{
if (image->bm)
{ free ((char *) image->bm); image->bm = (unsigned char *) NULL; }
if (image->cm)
{ free ((char *) image->cm); image->cm = (unsigned char *) NULL; }
return (1);
}