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16<title>TIFFFieldWriteCount</title>
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20
21<h1 align="center">TIFFFieldWriteCount</h1>
22
23<a href="#NAME">NAME</a><br>
24<a href="#SYNOPSIS">SYNOPSIS</a><br>
25<a href="#DESCRIPTION">DESCRIPTION</a><br>
26<a href="#RETURN VALUES">RETURN VALUES</a><br>
27<a href="#SEE ALSO">SEE ALSO</a><br>
28
29<hr>
30
31
32<h2>NAME
33<a name="NAME"></a>
34</h2>
35
36
37
38<p style="margin-left:11%; margin-top: 1em">TIFFFieldWriteCount
39&minus; Get number of values to be written to field</p>
40
41<h2>SYNOPSIS
42<a name="SYNOPSIS"></a>
43</h2>
44
45
46<p style="margin-left:11%; margin-top: 1em"><b>#include
47&lt;tiffio.h&gt;</b></p>
48
49<p style="margin-left:11%; margin-top: 1em"><b>int
50TIFFFieldWriteCount(const TIFFField*</b>
51<i>fip</i><b>)</b></p>
52
53<h2>DESCRIPTION
54<a name="DESCRIPTION"></a>
55</h2>
56
57
58
59<p style="margin-left:11%; margin-top: 1em"><b>TIFFFieldWriteCount</b>
60returns the number of values to be written into the
61specified TIFF field; that is, the number of arguments that
62should be supplied to <b>TIFFSetField</b>. For most field
63types this is a small positive integer, typically 1 or 2,
64but there are some special values: <b><br>
65TIFF_VARIABLE</b> indicates that a variable number of values
66is possible; then, a <b>uint16</b> <i>count</i> argument and
67a pointer <i>data</i> argument must be supplied to
68<b>TIFFSetField</b>. <b><br>
69TIFF_VARIABLE2</b> is the same as <b>TIFF_VARIABLE</b>
70except that the <i>count</i> argument must have type
71<b>uint32</b>. (On most modern machines, this makes no
72practical difference, and the <i>count</i> argument can
73simply be an <b>int</b> in either case.) <b><br>
74TIFF_SPP</b> indicates that the number of arguments must be
75equal to the image&rsquo;s number of samples per pixel.</p>
76
77<p style="margin-left:11%; margin-top: 1em"><i>fip</i> is a
78field information pointer previously returned by
79<b>TIFFFindField</b>, <b>TIFFFieldWithTag</b>, or
80<b>TIFFFieldWithName</b>.</p>
81
82<p style="margin-left:11%; margin-top: 1em">For most field
83types, <b>TIFFFieldWriteCount</b> returns the same value as
84<b>TIFFFieldReadCount</b>, but there are some
85exceptions.</p>
86
87<h2>RETURN VALUES
88<a name="RETURN VALUES"></a>
89</h2>
90
91
92
93<p style="margin-left:11%; margin-top: 1em"><b>TIFFFieldWriteCount</b>
94returns an integer.</p>
95
96<h2>SEE ALSO
97<a name="SEE ALSO"></a>
98</h2>
99
100
101
102<p style="margin-left:11%; margin-top: 1em"><b>libtiff</b>(3TIFF),</p>
103
104<p style="margin-left:11%; margin-top: 1em">Libtiff library
105home page: <b>http://www.simplesystems.org/libtiff/</b></p>
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