89 lines
2.7 KiB
Plaintext
89 lines
2.7 KiB
Plaintext
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.\" $Id: TIFFFieldWriteCount.3tiff,v 1.1 2012-07-29 15:45:30 tgl Exp $
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.\"
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.\" Copyright (c) 2012, Tom Lane <tgl@sss.pgh.pa.us>
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.\"
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.\" Permission to use, copy, modify, distribute, and sell this software and
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.\" its documentation for any purpose is hereby granted without fee, provided
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.\" that (i) the above copyright notices and this permission notice appear in
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.\" all copies of the software and related documentation, and (ii) the names of
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.\" Sam Leffler and Silicon Graphics may not be used in any advertising or
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.\" publicity relating to the software without the specific, prior written
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.\" permission of Sam Leffler and Silicon Graphics.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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.\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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.\"
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.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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.\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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.\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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.\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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.\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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.\" OF THIS SOFTWARE.
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.\"
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.if n .po 0
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.TH TIFFFieldWriteCount 3TIFF "July 26, 2012" "libtiff"
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.SH NAME
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TIFFFieldWriteCount \- Get number of values to be written to field
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.SH SYNOPSIS
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.B "#include <tiffio.h>"
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.sp
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.BI "int TIFFFieldWriteCount(const TIFFField* " fip ")"
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.SH DESCRIPTION
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.BR TIFFFieldWriteCount
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returns the number of values to be written into the specified
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TIFF field; that is, the number of arguments that should be supplied to
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.BR TIFFSetField .
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For most field types this is a small positive integer, typically 1 or 2,
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but there are some special values:
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.br
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.BR TIFF_VARIABLE
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indicates that a variable number of values is possible; then, a
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.BR uint16
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.I count
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argument and a pointer
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.I data
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argument must be supplied to
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.BR TIFFSetField .
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.br
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.BR TIFF_VARIABLE2
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is the same as
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.BR TIFF_VARIABLE
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except that the
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.I count
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argument must have type
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.BR uint32 .
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(On most modern machines, this makes no practical difference, and the
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.I count
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argument can simply be an
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.BR int
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in either case.)
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.br
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.BR TIFF_SPP
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indicates that the number of arguments must be equal to the image's
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number of samples per pixel.
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.P
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.I fip
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is a field information pointer previously returned by
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.BR TIFFFindField ,
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.BR TIFFFieldWithTag ,
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or
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.BR TIFFFieldWithName .
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.P
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For most field types,
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.BR TIFFFieldWriteCount
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returns the same value as
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.BR TIFFFieldReadCount ,
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but there are some exceptions.
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.br
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.SH "RETURN VALUES"
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.br
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.BR TIFFFieldWriteCount
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returns an integer.
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.br
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.SH "SEE ALSO"
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.BR libtiff (3TIFF),
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.PP
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Libtiff library home page:
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.BR http://www.remotesensing.org/libtiff/
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