$Id: TIFFFieldWriteCount.3tiff,v 1.2 2016-09-25 20:05:49 bfriesen Exp $

 Copyright (c) 2012, Tom Lane <tgl@sss.pgh.pa.us>

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 its documentation for any purpose is hereby granted without fee, provided
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 TIFFFieldWriteCount 3TIFF "July 26, 2012" "libtiff"
 NAME
TIFFFieldWriteCount - Get number of values to be written to field

 SYNOPSIS
 "#include <tiffio.h>"  "int TIFFFieldWriteCount(const TIFFField* " fip ")" 
 DESCRIPTION
 TIFFFieldWriteCount returns the number of values to be written into the specified
TIFF field; that is, the number of arguments that should be supplied to
 TIFFSetField . For most field types this is a small positive integer, typically 1 or 2,
but there are some special values:


 TIFF_VARIABLE indicates that a variable number of values is possible; then, a
 uint16  count argument and a pointer
 data argument must be supplied to
 TIFFSetField . 

 TIFF_VARIABLE2 is the same as
 TIFF_VARIABLE except that the
 count argument must have type
 uint32 . (On most modern machines, this makes no practical difference, and the
 count argument can simply be an
 int in either case.)


 TIFF_SPP indicates that the number of arguments must be equal to the image's
number of samples per pixel.


 fip is a field information pointer previously returned by
 TIFFFindField ,  TIFFFieldWithTag , or
 TIFFFieldWithName . 

For most field types,
 TIFFFieldWriteCount returns the same value as
 TIFFFieldReadCount , but there are some exceptions.



 "RETURN VALUES"

 TIFFFieldWriteCount returns an integer.



 "SEE ALSO"
 libtiff (3TIFF), 

Libtiff library home page:
 http://www.simplesystems.org/libtiff/