forked from Mirrors/freeswitch
e6e5fde3b0
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13134 d0543943-73ff-0310-b7d9-9358b9ac24b2
219 lines
7.9 KiB
HTML
219 lines
7.9 KiB
HTML
<!-- Creator : groff version 1.18.1 -->
|
|
<!-- CreationDate: Mon Mar 13 18:03:09 2006 -->
|
|
<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 − 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 <tiffio.h></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— 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 ‘‘chopped
|
|
strips’’ 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 "%s"</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 "%s"
|
|
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 "%s" (%lu,
|
|
expecting %lu); tag ignored</b>. The specified tag’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 "%s"</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 "%s";
|
|
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
|
|
"ImageLength" 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
|
|
"PlanarConfig" 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
|
|
"StripOffsets" 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
|
|
"TileOffsets" 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
|
|
"StripByteCounts" 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
|
|
"StripByteCounts" 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 "StripByteCounts" 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>
|