VistaIOSelectBand(3)

NAME
VistaIOSelectBand - select bands of image pixels

SYNOPSIS
#include <vistaio.h>

VistaIOBoolean VistaIOSelectBand (routine, image, band, npixels, first_pixel)
    VistaIOStringConst routine;
    VistaIOImage image;
    VistaIOBand band;
    int *npixels;
    VistaIOPointer *first_pixel;

ARGUMENTS

routine
    Names the routine that is using VistaIOSelectBand to check its arguments. This name is included in any error messages produced by VistaIOSelectBand.

image
    Specifies the image whose pixels are to be selected.

band
    May specify a particular band of the image to be selected, or may be VistaIOAllBands to indicate that all bands of the image should be selected.

npixels
    Returns the number of pixels selected, or may be NULL

first_pixel
    Returns the address of the first pixel selected, or may be NULL

DESCRIPTION
VistaIOSelectBand selects one or all bands of an image for processing.

The image argument specifies the image, and band specifies either a single band or all bands of that image. VistaIOSelectBand checks the validity of those two arguments, then returns via npixels and first_pixel the number and location of the selected pixels. (The pixels will be occupying a contiguous block of memory.) Either npixels or first_pixel may be NULL if the corresponding return value is wanted.

RETURN VALUES
VistaIOSelectBand returns TRUE if its image and band arguments are consistent, and FALSE otherwise.

SEE ALSO
VistaIOImage(3),

DIAGNOSTICS

``Routine: Band band referenced in image of nbands band(s).''
    The band argument is invalid given the number of bands in image. Routine will be the name supplied by the routine argument.

AUTHOR
Art Pope <pope@cs.ubc.ca> Adaption to vistaio: Gert Wollny <gw.fossdev@gmail.com>