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+<!-- Creator : groff version 1.18.1 -->
+<!-- CreationDate: Mon Mar 13 18:03:08 2006 -->
+<html>
+<head>
+<meta name="generator" content="groff -Thtml, see www.gnu.org">
+<meta name="Content-Style" content="text/css">
+<title>TIFFGetField</title>
+</head>
+<body>
+
+<h1 align=center>TIFFGetField</h1>
+<a href="#NAME">NAME</a><br>
+<a href="#SYNOPSIS">SYNOPSIS</a><br>
+<a href="#DESCRIPTION">DESCRIPTION</a><br>
+<a href="#AUTOREGISTERED TAGS">AUTOREGISTERED TAGS</a><br>
+<a href="#RETURN VALUES">RETURN VALUES</a><br>
+<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
+<a href="#SEE ALSO">SEE ALSO</a><br>
+
+<hr>
+<a name="NAME"></a>
+<h2>NAME</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p>TIFFGetField, TIFFVGetField &minus; get the value(s) of a
+tag in an open <small>TIFF</small> file</p>
+</td>
+</table>
+<a name="SYNOPSIS"></a>
+<h2>SYNOPSIS</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p><b>#include &lt;tiffio.h&gt;</b></p>
+<!-- INDENTATION -->
+<p><b>int TIFFGetField(TIFF *</b><i>tif</i><b>, ttag_t</b>
+<i>tag</i><b>,</b> <i>...</i><b>)</b></p>
+<!-- INDENTATION -->
+<p><b>#include &lt;stdarg.h&gt;</b></p>
+<!-- INDENTATION -->
+<p><b>int TIFFVGetField(TIFF *</b><i>tif</i><b>, ttag_t</b>
+<i>tag</i><b>, va_list</b> <i>ap</i><b>)<br>
+int TIFFGetFieldDefaulted(TIFF *</b><i>tif</i><b>,
+ttag_t</b> <i>tag</i><b>,</b> <i>...</i><b>)<br>
+int TIFFVGetFieldDefaulted(TIFF *</b><i>tif</i><b>,
+ttag_t</b> <i>tag</i><b>, va_list</b> <i>ap</i><b>)</b></p>
+</td>
+</table>
+<a name="DESCRIPTION"></a>
+<h2>DESCRIPTION</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p><i>TIFFGetField</i> returns the value of a tag or
+pseudo-tag associated with the the current directory of the
+opened <small>TIFF</small> file <i>tif</i>. (A
+<i>pseudo-tag</i> is a parameter that is used to control the
+operation of the <small>TIFF</small> library but whose value
+is not read or written to the underlying file.) The file
+must have been previously opened with
+<i>TIFFOpen</i>(3TIFF). The tag is identified by <i>tag</i>,
+one of the values defined in the include file <b>tiff.h</b>
+(see also the table below). The type and number of values
+returned is dependent on the tag being requested. The
+programming interface uses a variable argument list as
+prescribed by the <i>stdarg</i>(3) interface. The returned
+values should only be interpreted if <i>TIFFGetField</i>
+returns 1.</p>
+<!-- INDENTATION -->
+<p><i>TIFFVGetField</i> is functionally equivalent to
+<i>TIFFGetField</i> except that it takes a pointer to a
+variable argument list. <i>TIFFVGetField</i> is useful for
+layering interfaces on top of the functionality provided by
+<i>TIFFGetField</i>.</p>
+<!-- INDENTATION -->
+<p><i>TIFFGetFieldDefaulted</i> and
+<i>TIFFVGetFieldDefaulted</i> are identical to
+<i>TIFFGetField</i> and <i>TIFFVGetField</i>, except that if
+a tag is not defined in the current directory and it has a
+default value, then the default value is returned.</p>
+<!-- INDENTATION -->
+<p>The tags understood by <i>libtiff(3TIFF),</i> the number
+of parameter values, and the types for the returned values
+are shown below. The data types are specified as in C and
+correspond to the types used to specify tag values to
+<i>TIFFSetField</i>(3TIFF). Remember that
+<i>TIFFGetField</i> returns parameter values, so all the
+listed data types are pointers to storage where values
+should be returned. Consult the <small>TIFF</small>
+specification (or relevant industry specification) for
+information on the meaning of each tag and their possible
+values.</p></td>
+</table>
+<!-- TABS -->
+
+<p><i>Tag Name Count Types Notes</i></p>
+<!-- TABS -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="5" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_ARTIST</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_BADFAXLINES</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_BITSPERSAMPLE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_CLEANFAXDATA</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_COLORMAP</p>
+</td>
+<td width="8%">
+
+<p>3</p>
+</td>
+<td width="23%">
+
+<p>uint16**</p>
+</td>
+<td width="17%">
+
+<p>1&lt;&lt;BitsPerSample arrays</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_COMPRESSION</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_CONSECUTIVEBADFAXLINES</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_COPYRIGHT</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_DATATYPE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_DATETIME</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_DOCUMENTNAME</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_DOTRANGE</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_EXTRASAMPLES</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint16*,uint16**</p>
+</td>
+<td width="17%">
+
+<p>count &amp; types array</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_FAXFILLFUNC</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>TIFFFaxFillFunc*</p>
+</td>
+<td width="17%">
+
+<p>G3/G4 compression pseudo-tag</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_FAXMODE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>int*</p>
+</td>
+<td width="17%">
+
+<p>G3/G4 compression pseudo-tag</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_FILLORDER</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_GROUP3OPTIONS</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_GROUP4OPTIONS</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_HALFTONEHINTS</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_HOSTCOMPUTER</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_ICCPROFILE</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint32*,void**</p>
+</td>
+<td width="17%">
+
+<p>count, profile data</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_IMAGEDEPTH</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_IMAGEDESCRIPTION</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_IMAGELENGTH</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_IMAGEWIDTH</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_INKNAMES</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_INKSET</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_JPEGCOLORMODE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>int*</p>
+</td>
+<td width="17%">
+
+<p>JPEG pseudo-tag</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_JPEGQUALITY</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>int*</p>
+</td>
+<td width="17%">
+
+<p>JPEG pseudo-tag</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_JPEGTABLES</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint32*,void**</p>
+</td>
+<td width="17%">
+
+<p>count &amp; tables</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_JPEGTABLESMODE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>int*</p>
+</td>
+<td width="17%">
+
+<p>JPEG pseudo-tag</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_MAKE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_MATTEING</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_MAXSAMPLEVALUE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_MINSAMPLEVALUE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_MODEL</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_ORIENTATION</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_PAGENAME</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_PAGENUMBER</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_PHOTOMETRIC</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_PHOTOSHOP</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint32*,void**</p>
+</td>
+<td width="17%">
+
+<p>count, data</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_PLANARCONFIG</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_PREDICTOR</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_PRIMARYCHROMATICITIES</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>float**</p>
+</td>
+<td width="17%">
+
+<p>6-entry array</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_REFERENCEBLACKWHITE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>float**</p>
+</td>
+<td width="17%">
+
+<p>2*SamplesPerPixel array</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_RESOLUTIONUNIT</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_RICHTIFFIPTC</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint32*,void**</p>
+</td>
+<td width="17%">
+
+<p>count, data</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_ROWSPERSTRIP</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_SAMPLEFORMAT</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_SAMPLESPERPIXEL</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_SMAXSAMPLEVALUE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>double*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_SMINSAMPLEVALUE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>double*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_SOFTWARE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_STONITS</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>double**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_STRIPBYTECOUNTS</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_STRIPOFFSETS</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_SUBFILETYPE</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_SUBIFD</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint16*,uint32**</p>
+</td>
+<td width="17%">
+
+<p>count &amp; offsets array</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_TARGETPRINTER</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>char**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_THRESHHOLDING</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_TILEBYTECOUNTS</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_TILEDEPTH</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_TILELENGTH</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_TILEOFFSETS</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32**</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_TILEWIDTH</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint32*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_TRANSFERFUNCTION</p>
+</td>
+<td width="8%">
+
+<p>1 or 3&dagger;</p>
+</td>
+<td width="23%"></td>
+<td width="17%">
+
+<p>uint16**1&lt;&lt;BitsPerSample entry arrays</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_WHITEPOINT</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>float**</p>
+</td>
+<td width="17%">
+
+<p>2-entry array</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_XMLPACKET</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint32*,void**</p>
+</td>
+<td width="17%">
+
+<p>count, data</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_XPOSITION</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>float*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_XRESOLUTION</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>float*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_YCBCRCOEFFICIENTS</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>float**</p>
+</td>
+<td width="17%">
+
+<p>3-entry array</p>
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_YCBCRPOSITIONING</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_YCBCRSUBSAMPLING</p>
+</td>
+<td width="8%">
+
+<p>2</p>
+</td>
+<td width="23%">
+
+<p>uint16*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_YPOSITION</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>float*</p>
+</td>
+<td width="17%">
+</td>
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="41%">
+
+<p>TIFFTAG_YRESOLUTION</p>
+</td>
+<td width="8%">
+
+<p>1</p>
+</td>
+<td width="23%">
+
+<p>float*&Dagger;</p>
+</td>
+<td width="17%">
+</td>
+</table>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p>&dagger; If <i>SamplesPerPixel</i> is one, then a single
+array is returned; otherwise three arrays are returned.<br>
+&Dagger; The contents of this field are quite complex. See
+<i>The ICC Profile Format Specification</i>, Annex B.3
+&quot;Embedding ICC Profiles in TIFF Files&quot; (available
+at http://www.color.org) for an explanation.</p>
+</td>
+</table>
+<a name="AUTOREGISTERED TAGS"></a>
+<h2>AUTOREGISTERED TAGS</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p>If you can&rsquo;t find the tag in the table above that
+means this is unsupported tag. But you still be able to read
+it&rsquo;s value if you know the data type of that tag. For
+example, if you want to read the LONG value from the tag
+33424 and ASCII string from the tag 36867 you can use the
+following code:</p>
+</td>
+</table>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="17%"></td>
+<td width="82%">
+<pre>uint16 count;
+void *data;
+
+TIFFGetField(tiff, 33424, &amp;count, &amp;data);
+printf(&quot;Tag %d: %d, count %d0, 33424, *(uint32 *)data, count);
+TIFFGetField(tiff, 36867, &amp;count, &amp;data);
+printf(&quot;Tag %d: %s, count %d0, 36867, (char *)data, count);
+</pre>
+</td>
+</table>
+<!-- INDENTATION -->
+
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p>is not supported by <b>libtiff(3TIFF),</b> library</p>
+</td>
+</table>
+<a name="RETURN VALUES"></a>
+<h2>RETURN VALUES</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p>1 is returned if the tag is defined in the current
+directory; otherwise a 0 is returned.</p>
+</td>
+</table>
+<a name="DIAGNOSTICS"></a>
+<h2>DIAGNOSTICS</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p>All error messages are directed to the
+<b>TIFFError</b>(3TIFF) routine.</p>
+<!-- INDENTATION -->
+<p><b>Unknown field, tag 0x%x</b>. An unknown tag was
+supplied.</p>
+</td>
+</table>
+<a name="SEE ALSO"></a>
+<h2>SEE ALSO</h2>
+<!-- INDENTATION -->
+<table width="100%" border=0 rules="none" frame="void"
+ cols="2" cellspacing="0" cellpadding="0">
+<tr valign="top" align="left">
+<td width="8%"></td>
+<td width="91%">
+<p><b>TIFFOpen</b>(3TIFF), <b>TIFFSetField</b>(3TIFF),
+<b>TIFFSetDirectory</b>(3TIFF),
+<b>TIFFReadDirectory</b>(3TIFF),
+<b>TIFFWriteDirectory</b>(3TIFF) <b>libtiff</b>(3TIFF),</p>
+<!-- INDENTATION -->
+<p>Libtiff library home page:
+<b>http://www.remotesensing.org/libtiff/</b></p>
+</td>
+</table>
+<hr>
+</body>
+</html>