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    Length: 2328 (0x918)
    Types: TextFile
    Names: »iff_stdim.h++«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─ ⟦this⟧ »EUUGD11/euug-87hel/sec1/image/varc++/iff_stdim.h++« 

TextFile

/* file: image.h  */

/* iff: Standard image file format					*/

/* (c) Copyright 1982,
   William S. Havens
   Laboratory for Computational Vision
   University of British Columbia

   Adapted from image files developed by Randy Schulz at 
    the University of Wisconsin-Madison
   Differences:
    1) Uses bit-stream I/O allowing random access of arbitrary size pixels.
    2) Pixels may range in size from 0 to sizeof(long) = 32-bits.
    3) Signed/unsigned images are supported.
    4) Positive/negative images are supported.
    5) Extensible user-defined parameter space is defined.
*/

#include  "bitio.h++"


/* Image file definitions						*/

#define IMAGIC	"Imagefile"	/* Magic number for image files		*/
#define	IMVERSION 2		/* iff version number			*/
#define	IMBPP     8		/* Default number of bits per pixel	*/
#define IMSIGNED  0		/* Default image is unsigned		*/
#define	IMPOSTVE  1		/* Default image is positive encoded	*/
#define	IMNPARMS  6		/* # of image parameters in header	*/

#define IMBLKSZE BBLKSZE	/* Use block size of bitio file		*/
#define IMHDRSZE 1024		/* Physical header size in file		*/

struct image 
       {
	struct iff_bfile	*bfile;		/* bitio file pointer			*/
	long	nrows;		/* Number of rows in image		*/
	long	ncols;		/* Number of columns in image		*/
	short	bpp;		/* Bits per pixel			*/
	short	is_signed;	/* Signed / Unsigned image		*/
	short	positive;	/* Positive / Negative image		*/
	short	hdroffset;	/* Header offset in file in bits	*/
  } ;


struct image *iopen(...), *idopen(...);

/* Image header format	*/
#define IMHDRFMT  "Imagefile version-%d: nrows = %D ncols = %D bpp = %hd signed = %hd positive = %hd\n"


/* Macros */

#define getpix(ifp)		bget ((ifp)->bfile, (ifp)->bpp, (ifp)->is_signed)
#define putpix(ifp,pixel)	bput ((ifp)->bfile, pixel, (ifp)->bpp)
#define isync(ifp)		bsync ((ifp)->bfile)
#define iseek(ifp,row,col)	bseek ((ifp)->bfile, (long)((((ifp)->ncols*(row))+(col))*((ifp)->bpp)+(ifp)->hdroffset), 0)
#define ierror(ifp)		berror ((ifp)->bfile)
#define ieof(ifp)		beof ((ifp)->bfile)

/* end of file image.h */
/*
Copyright (C) 1986, David Sher in the University of Rochester
Permission is granted to any individual or institution to use, copy, or
redistribute this software so long as it is not sold for profit, provided
this copyright notice is retained.
*/