.help impl Sep86 imfort
.ih
NAME
.nf
impl -- put (rewrite) an image line
.fi
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SYNOPSIS
.nf
subroutine impl1r (im, rbuf, ier)
subroutine impl1s (im, sbuf, ier)
subroutine impl2r (im, rbuf, lineno, ier)
subroutine impl2s (im, sbuf, lineno, ier)
subroutine impl3r (im, rbuf, lineno, bandno, ier)
subroutine impl3s (im, sbuf, lineno, bandno, ier)

integer		im		#I image descriptor of open image
real		rbuf(*)		#I output pixel buffer, type real
integer*2	sbuf(*)		#I output pixel buffer, type short
integer		lineno		#I line (row) number (1:axlen(2))
integer		bandno		#I band number (1:axlen(3))
integer		ier		#O status return
.fi
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DESCRIPTION
The \fIimpl\fR procedures are used to rewrite a line (row) of an image.
Procedures are provided for images of from one to three dimensions,
of pixel type short integer or real.  The type real procedures may be
applied to images of either type, but the type short procedures may only
be used to access images of type short.  The input buffer should contain
\fIaxlen(1)\fR pixels ready to be written to the image when the \fIimpl\fR
procedure is called.
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RETURN VALUE
A zero status is returned if the referenced image line is in-bounds and
the actual pixel datatype of the image is one of the types permitted by
the particular operator called.

.nf
IE_NOTSHORT:	imfort short integer i/o requires a type short image
IE_PIXTYPE:	image pixel type must be short or real
IE_WRPIX:	error writing image pixel file
IE_YOOB:	image y coordinates out of range
IE_ZOOB:	image z coordinates out of range
.fi
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SEE ALSO
imgl, imgs, imps
.endhelp