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LOGICAL

Section: C Library Functions (3)
Updated: 16 Mar 1998
Index

NAME

logical, logical_and, logical_or, logical_xor, logical_not,logical_band, logical_bor, logical_bxor, logical_bnot,logical_lshift, logical_rshift, logical_eq, logical_ne,logical_lt, logical_le, logical_gt, logical_ge, logical_mask,logical_bandc, logical_borc, logical_bxorc, logical_eqc,logical_nec, logical_ltc, logical_lec, logical_gtc,logical_gec - logical operators on bands

SYNTAX

#include <xite/arithmetic.h>

int logical_and( IBAND input1, IBAND input2,
IBAND output );

int logical_or( IBAND input1, IBAND input2,
IBAND output );

int logical_xor( IBAND input1, IBAND input2,
IBAND output );

int logical_not( IBAND input, IBAND output );

int logical_band( IBAND input1, IBAND input2,
IBAND output );

int logical_bor( IBAND input1, IBAND input2,
IBAND output );

int logical_bxor( IBAND input1, IBAND input2,
IBAND output );

int logical_bnot( IBAND input, IBAND output );

int logical_lshift( IBAND input, IBAND output,
int n );

int logical_rshift( IBAND input, IBAND output,
int n );

int logical_eq( IBAND input1, IBAND input2,
IBAND output );

int logical_ne( IBAND input1, IBAND input2,
IBAND output );

int logical_lt( IBAND input1, IBAND input2,
IBAND output );

int logical_le( IBAND input1, IBAND input2,
IBAND output );

int logical_gt( IBAND input1, IBAND input2,
IBAND output );

int logical_ge( IBAND input1, IBAND input2,
IBAND output );

int logical_mask( IBAND input1, IBAND input2,
IBAND output );

int logical_bandc( IBAND input, IBAND output,
UNS_BYTE c );

int logical_borc( IBAND input, IBAND output,
UNS_BYTE c );

int logical_bxorc( IBAND input, IBAND output,
UNS_BYTE c );

int logical_eqc( IBAND input, IBAND output,
UNS_BYTE c );

int logical_nec( IBAND input, IBAND output,
UNS_BYTE c );

int logical_ltc( IBAND input, IBAND output,
UNS_BYTE c );

int logical_lec( IBAND input, IBAND output,
UNS_BYTE c );

int logical_gtc( IBAND input, IBAND output,
UNS_BYTE c );

int logical_gec( IBAND input, IBAND output,
UNS_BYTE c );

DESCRIPTION

logical is a collection of logical operators on bands.For every pixel position, the unary or binary operatoris performed on the input band(s), and the result isassigned to the output band.

logical_and    - logical and (MIN operator)
logical_or     - logical or  (MAX operator)
logical_xor    - logical xor
logical_not    - logical not
logical_band   - bitwise and
logical_bor    - bitwise or
logical_bxor   - bitwise xor
logical_bnot   - bitwise not
logical_lshift - left shift
logical_rshift - right shift
logical_eq     - equality
logical_ne     - not equality
logical_lt     - less than
logical_le     - less equal
logical_gt     - greater than
logical_ge     - greater equal
logical_mask   - (input2) ? input1 : 0
logical_bandc  - bitwise and with constant c
logical_borc   - bitwise or with constant c
logical_bxorc  - bitwise xor with constant c
logical_eqc    - equal to constant
logical_nec    - not equal to constant
logical_ltc    - less than constant
logical_lec    - less equal constant
logical_gtc    - greater than constant
logical_gec    - greater equal constant

Only the largest rectangle common for all bandsis processed. Identical actual band arguments areallowed.

RESTRICTIONS

Only pixeltype unsigned byte is allowed.

RETURN VALUE

0 => ok
1 => bad pixel value input band 1
2 => bad pixel value input band 2
3 => bad pixel value output band

AUTHOR

Tor Lřnnestad, BLAB, Ifi, UiO

ID

$Id: logical.c,v 1.28 1997/01/09 16:30:39 svein Exp $

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