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-<!-- Creator : groff version 1.18.1 -->
-<!-- CreationDate: Fri Jul 13 17:43:16 2007 -->
-<html>
-<head>
-<meta name="generator" content="groff -Thtml, see www.gnu.org">
-<meta name="Content-Style" content="text/css">
-<title>TIFFReadDirectory</title>
-</head>
-<body>
-
-<h1 align=center>TIFFReadDirectory</h1>
-<a href="#NAME">NAME</a><br>
-<a href="#SYNOPSIS">SYNOPSIS</a><br>
-<a href="#DESCRIPTION">DESCRIPTION</a><br>
-<a href="#NOTES">NOTES</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><big>TIFFReadDirectory &minus; get the contents of the
-next directory in an open</big> TIFF <big>file</big></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><big><b>#include &lt;tiffio.h&gt;</b></big></p>
-<!-- INDENTATION -->
-<p><big><b>int TIFFReadDirectory(TIFF
-*</b><i>tif</i><b>)</b></big></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><big>Read the next directory in the specified file and
-make it the current directory. Applications only need to
-call <i>TIFFReadDirectory</i> to read multiple subfiles in a
-single</big> TIFF <big>file&mdash; the first directory in a
-file is automatically read when <i>TIFFOpen</i> is
-called.</big></p>
-</td>
-</table>
-<a name="NOTES"></a>
-<h2>NOTES</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><big>If the library is compiled with</big>
-STRIPCHOP_SUPPORT <big>enabled, then images that have a
-single uncompressed strip or tile of data are automatically
-treated as if they were made up of multiple strips or tiles
-of approximately 8 kilobytes each. This operation is done
-only in-memory; it does not alter the contents of the file.
-However, the construction of the &lsquo;&lsquo;chopped
-strips&rsquo;&rsquo; is visible to the application through
-the number of strips [tiles] returned by
-<i>TIFFNumberOfStrips</i>
-[<i>TIFFNumberOfTiles</i>].</big></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><big>If the next directory was successfully read, 1 is
-returned. Otherwise, 0 is returned if an error was
-encountered, or if there are no more directories to be
-read.</big></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><big>All error messages are directed to the
-<i>TIFFError</i>(3TIFF) routine. All warning messages are
-directed to the <i>TIFFWarning</i>(3TIFF) routine.</big></p>
-<!-- INDENTATION -->
-<p><big><b>Seek error accessing TIFF directory</b>. An error
-occurred while positioning to the location of the
-directory.</big></p>
-<!-- INDENTATION -->
-<p><big><b>Wrong data type %d for field &quot;%s&quot;</b>.
-The tag entry in the directory had an incorrect data type.
-For example, an <i>ImageDescription</i> tag with a</big>
-SHORT <big>data type.</big></p>
-<!-- INDENTATION -->
-<p><big><b>TIFF directory is missing required &quot;%s&quot;
-field</b>. The specified tag is required to be present by
-the</big> TIFF <big>5.0 specification, but is missing. The
-directory is (usually) unusable.</big></p>
-<!-- INDENTATION -->
-<p><big><b>%s: Rational with zero denominator</b>. A
-directory tag has a</big> RATIONAL <big>value whose
-denominator is zero.</big></p>
-<!-- INDENTATION -->
-<p><big><b>Incorrect count %d for field &quot;%s&quot; (%lu,
-expecting %lu); tag ignored</b>. The specified tag&rsquo;s
-count field is bad. For example, a count other than 1 for a
-<i>SubFileType</i> tag.</big></p>
-<!-- INDENTATION -->
-<p><big><b>Cannot handle different per-sample values for
-field &quot;%s&quot;</b>. The tag has <i>SamplesPerPixel</i>
-values and they are not all the same; e.g.
-<i>BitsPerSample</i>. The library is unable to handle images
-of this sort.</big></p>
-<!-- INDENTATION -->
-<p><big><b>Count mismatch for field &quot;%s&quot;;
-expecting %d, got %d</b>. The count field in a tag does not
-agree with the number expected by the library. This should
-never happen, so if it does, the library refuses to read the
-directory.</big></p>
-<!-- INDENTATION -->
-<p><big><b>Invalid TIFF directory; tags are not sorted in
-ascending order</b>. The directory tags are not properly
-sorted as specified in the</big> TIFF <big>5.0
-specification. This error is not fatal.</big></p>
-<!-- INDENTATION -->
-<p><big><b>Ignoring unknown field with tag %d (0x%x)</b>. An
-unknown tag was encountered in the directory; the library
-ignores all such tags.</big></p>
-<!-- INDENTATION -->
-<p><big><b>TIFF directory is missing requred
-&quot;ImageLength&quot; field</b>. The image violates the
-specification by not having a necessary field. There is no
-way for the library to recover from this error.</big></p>
-<!-- INDENTATION -->
-<p><big><b>TIFF directory is missing requred
-&quot;PlanarConfig&quot; field</b>. The image violates the
-specification by not having a necessary field. There is no
-way for the library to recover from this error.</big></p>
-<!-- INDENTATION -->
-<p><big><b>TIFF directory is missing requred
-&quot;StripOffsets&quot; field</b>. The image has multiple
-strips, but is missing the tag that specifies the file
-offset to each strip of data. There is no way for the
-library to recover from this error.</big></p>
-<!-- INDENTATION -->
-<p><big><b>TIFF directory is missing requred
-&quot;TileOffsets&quot; field</b>. The image has multiple
-tiles, but is missing the tag that specifies the file offset
-to each tile of data. There is no way for the library to
-recover from this error.</big></p>
-<!-- INDENTATION -->
-<p><big><b>TIFF directory is missing required
-&quot;StripByteCounts&quot; field</b>. The image has
-multiple strips, but is missing the tag that specifies the
-size of each strip of data. There is no way for the library
-to recover from this error.</big></p>
-<!-- INDENTATION -->
-<p><big><b>TIFF directory is missing required
-&quot;StripByteCounts&quot; field, calculating from
-imagelength</b>. The image violates the specification by not
-having a necessary field. However, when the image is
-comprised of only one strip or tile, the library will
-estimate the missing value based on the file size.</big></p>
-<!-- INDENTATION -->
-<p><big><b>Bogus &quot;StripByteCounts&quot; field, ignoring
-and calculating from imagelength</b>. Certain vendors
-violate the specification by writing zero for the
-StripByteCounts tag when they want to leave the value
-unspecified. If the image has a single strip, the library
-will estimate the missing value based on the file
-size.</big></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><big><b>TIFFOpen</b>(3TIFF),
-<b>TIFFWriteDirectory</b>(3TIFF),
-<b>TIFFSetDirectory</b>(3TIFF),
-<b>TIFFSetSubDirectory</b>(3TIFF),
-<b>libtiff</b>(3TIFF)</big></p>
-<!-- INDENTATION -->
-<p><big>Libtiff library home page:
-<b>http://www.remotesensing.org/libtiff/</b></big></p>
-</td>
-</table>
-<hr>
-</body>
-</html>