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<!-- Creator : groff version 1.18.1 -->
<!-- CreationDate: Sat Feb 24 18:37:20 2007 -->
<html>
<head>
<meta name="generator" content="groff -Thtml, see www.gnu.org">
<meta name="Content-Style" content="text/css">
<title>INTRO</title>
</head>
<body>
<h1 align=center>INTRO</h1>
<a href="#NAME">NAME</a><br>
<a href="#SYNOPSIS">SYNOPSIS</a><br>
<a href="#DESCRIPTION">DESCRIPTION</a><br>
<a href="#DATA TYPES">DATA TYPES</a><br>
<a href="#LIST OF ROUTINES">LIST OF ROUTINES</a><br>
<a href="#TAG USAGE">TAG USAGE</a><br>
<a href="#PSEUDO TAGS">PSEUDO TAGS</a><br>
<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
<a href="#SEE ALSO">SEE ALSO</a><br>
<a href="#BUGS">BUGS</a><br>
<hr>
<a name="NAME"></a>
<h2>NAME</h2>
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<td width="91%">
<p><big>libtiff − introduction to <i>libtiff</i>, a
library for reading and writing</big> TIFF
<big>files</big></p>
</td>
</table>
<a name="SYNOPSIS"></a>
<h2>SYNOPSIS</h2>
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<td width="91%">
<p><big><b>#include <tiffio.h></b></big></p>
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<p><big>cc file.c <b>-ltiff</b></big></p>
</td>
</table>
<a name="DESCRIPTION"></a>
<h2>DESCRIPTION</h2>
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<td width="91%">
<p><big><i>libtiff</i> is a library for reading and writing
data files encoded with the <i>Tag Image File</i> format,
Revision 6.0 (or revision 5.0 or revision 4.0). This file
format is suitable for archiving multi-color and
monochromatic image data.</big></p>
<!-- INDENTATION -->
<p><big>The library supports several compression algorithms,
as indicated by the <i>Compression</i> field, including: no
compression (1),</big> CCITT <big>1D Huffman compression
(2),</big> CCITT <big>Group 3 Facsimile compression
(3),</big> CCITT <big>Group 4 Facsimile compression (4),
Lempel-Ziv & Welch compression (5), baseline JPEG
compression (7), word-aligned 1D Huffman compression
(32771), and PackBits compression (32773). In addition,
several nonstandard compression algorithms are supported:
the 4-bit compression algorithm used by the
<i>ThunderScan</i> program (32809) (decompression only),
NeXT’s 2-bit compression algorithm (32766)
(decompression only), an experimental LZ-style algorithm
known as Deflate (32946), and an experimental CIE LogLuv
compression scheme designed for images with high dynamic
range (32845 for LogL and 32845 for LogLuv). Directory
information may be in either little- or big-endian byte
order−byte swapping is automatically done by the
library. Data bit ordering may be either Most Significant
Bit (</big> MSB <big>) to Least Significant Bit (</big> LSB
<big>) or</big> LSB <big>to</big> MSB. <big>Finally, the
library does not support files in which the
<i>BitsPerSample</i>, <i>Compression</i>,
<i>MinSampleValue</i>, or <i>MaxSampleValue</i> fields are
defined differently on a per-sample basis (in Rev. 6.0 the
<i>Compression</i> tag is not defined on a per-sample basis,
so this is immaterial).</big></p>
</td>
</table>
<a name="DATA TYPES"></a>
<h2>DATA TYPES</h2>
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<td width="91%">
<p><big>The library makes extensive use of C typedefs to
promote portability. Two sets of typedefs are used, one for
communication with clients of the library and one for
internal data structures and parsing of the</big> TIFF
<big>format. The following typedefs are exposed to users
either through function definitions or through parameters
passed through the varargs interfaces.</big></p></td>
</table>
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<table width="100%" border=0 rules="none" frame="void"
cols="3" cellspacing="0" cellpadding="0">
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<td width="15%"></td>
<td width="46%">
<p><big>typedef unsigned short uint16;</big></p>
</td>
<td width="38%">
<p><big>16-bit unsigned integer</big></p>
</td>
<tr valign="top" align="left">
<td width="15%"></td>
<td width="46%">
<p><big>typedef unsigned <<i>thing</i>>
uint32;</big></p>
</td>
<td width="38%">
<p><big>32-bit unsigned integer</big></p>
</td>
<tr valign="top" align="left">
<td width="15%"></td>
<td width="46%">
<p><big>typedef unsigned int ttag_t;</big></p>
</td>
<td width="38%">
<p><big>directory tag</big></p>
</td>
<tr valign="top" align="left">
<td width="15%"></td>
<td width="46%">
<p><big>typedef uint16 tdir_t;</big></p>
</td>
<td width="38%">
<p><big>directory index</big></p>
</td>
<tr valign="top" align="left">
<td width="15%"></td>
<td width="46%">
<p><big>typedef uint16 tsample_t;</big></p>
</td>
<td width="38%">
<p><big>sample number</big></p>
</td>
<tr valign="top" align="left">
<td width="15%"></td>
<td width="46%">
<p><big>typedef uint32 tstrip_t;</big></p>
</td>
<td width="38%">
<p><big>strip number</big></p>
</td>
<tr valign="top" align="left">
<td width="15%"></td>
<td width="46%">
<p><big>typedef uint32 ttile_t;</big></p>
</td>
<td width="38%">
<p><big>tile number</big></p>
</td>
<tr valign="top" align="left">
<td width="15%"></td>
<td width="46%">
<p><big>typedef int32 tsize_t;</big></p>
</td>
<td width="38%">
<p><big>i/o size in bytes</big></p>
</td>
<tr valign="top" align="left">
<td width="15%"></td>
<td width="46%">
<p><big>typedef void* tdata_t;</big></p>
</td>
<td width="38%">
<p><big>image data ref</big></p>
</td>
<tr valign="top" align="left">
<td width="15%"></td>
<td width="46%">
<p><big>typedef void* thandle_t;</big></p>
</td>
<td width="38%">
<p><big>client data handle</big></p>
</td>
<tr valign="top" align="left">
<td width="15%"></td>
<td width="46%">
<p><big>typedef int32 toff_t;</big></p>
</td>
<td width="38%">
<p><big>file offset</big></p>
</td>
</table>
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cols="2" cellspacing="0" cellpadding="0">
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<td width="91%">
<p><big>Note that <i>tstrip_t</i>, <i>ttile_t</i>, and
<i>tsize_t</i> are constrained to be no more than 32-bit
quantities by 32-bit fields they are stored in in the</big>
TIFF <big>image. Likewise <i>tsample_t</i> is limited by the
16-bit field used to store the <i>SamplesPerPixel</i> tag.
<i>tdir_t</i> constrains the maximum number of</big> IFDs
<big>that may appear in an image and may be an arbitrary
size (w/o penalty). <i>ttag_t</i> must be either int,
unsigned int, pointer, or double because the library uses a
varargs interface and</big> ANSI C <big>restricts the type
of the parameter before an ellipsis to be a promoted type.
<i>toff_t</i> is defined as int32 because TIFF file offsets
are (unsigned) 32-bit quantities. A signed value is used
because some interfaces return −1 on error. Finally,
note that user-specified data references are passed as
opaque handles and only cast at the lowest layers where
their type is presumed.</big></p>
</td>
</table>
<a name="LIST OF ROUTINES"></a>
<h2>LIST OF ROUTINES</h2>
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<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>The following routines are part of the library.
Consult specific manual pages for details on their
operation; on most systems doing ‘‘man
function-name’’ will work.</big></p></td>
</table>
<!-- TABS -->
<p><big><i>Name Description</i></big></p>
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<table width="100%" border=0 rules="none" frame="void"
cols="3" cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFCheckpointDirectory</big></p>
</td>
<td width="67%">
<p><big>writes the current state of the directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFCheckTile</big></p>
</td>
<td width="67%">
<p><big>very x,y,z,sample is within image</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFCIELabToRGBInit</big></p>
</td>
<td width="67%">
<p><big>initialize CIE L*a*b* 1976 to RGB conversion
state</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFCIELabToXYZ</big></p>
</td>
<td width="67%">
<p><big>perform CIE L*a*b* 1976 to CIE XYZ
conversion</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFClientOpen</big></p>
</td>
<td width="67%">
<p><big>open a file for reading or writing</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFClose</big></p>
</td>
<td width="67%">
<p><big>close an open file</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFComputeStrip</big></p>
</td>
<td width="67%">
<p><big>return strip containing y,sample</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFComputeTile</big></p>
</td>
<td width="67%">
<p><big>return tile containing x,y,z,sample</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFCurrentDirectory</big></p>
</td>
<td width="67%">
<p><big>return index of current directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFCurrentRow</big></p>
</td>
<td width="67%">
<p><big>return index of current scanline</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFCurrentStrip</big></p>
</td>
<td width="67%">
<p><big>return index of current strip</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFCurrentTile</big></p>
</td>
<td width="67%">
<p><big>return index of current tile</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFDataWidth</big></p>
</td>
<td width="67%">
<p><big>return the size of TIFF data types</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFError</big></p>
</td>
<td width="67%">
<p><big>library error handler</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFFdOpen</big></p>
</td>
<td width="67%">
<p><big>open a file for reading or writing</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFFileName</big></p>
</td>
<td width="67%">
<p><big>return name of open file</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFFileno</big></p>
</td>
<td width="67%">
<p><big>return open file descriptor</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFFindCODEC</big></p>
</td>
<td width="67%">
<p><big>find standard codec for the specific
scheme</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFFlush</big></p>
</td>
<td width="67%">
<p><big>flush all pending writes</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFFlushData</big></p>
</td>
<td width="67%">
<p><big>flush pending data writes</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFGetBitRevTable</big></p>
</td>
<td width="67%">
<p><big>return bit reversal table</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFGetField</big></p>
</td>
<td width="67%">
<p><big>return tag value in current directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFGetFieldDefaulted</big></p>
</td>
<td width="67%">
<p><big>return tag value in current directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFGetMode</big></p>
</td>
<td width="67%">
<p><big>return open file mode</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFGetVersion</big></p>
</td>
<td width="67%">
<p><big>return library version string</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFIsCODECConfigured</big></p>
</td>
<td width="67%">
<p><big>check, whether we have working codec</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFIsMSB2LSB</big></p>
</td>
<td width="67%">
<p><big>return true if image data is being
returned</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%"></td>
<td width="67%">
<p><big>with bit 0 as the most significant bit</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFIsTiled</big></p>
</td>
<td width="67%">
<p><big>return true if image data is tiled</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFIsByteSwapped</big></p>
</td>
<td width="67%">
<p><big>return true if image data is byte-swapped</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFNumberOfStrips</big></p>
</td>
<td width="67%">
<p><big>return number of strips in an image</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFNumberOfTiles</big></p>
</td>
<td width="67%">
<p><big>return number of tiles in an image</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFOpen</big></p>
</td>
<td width="67%">
<p><big>open a file for reading or writing</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFPrintDirectory</big></p>
</td>
<td width="67%">
<p><big>print description of the current
directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFReadBufferSetup</big></p>
</td>
<td width="67%">
<p><big>specify i/o buffer for reading</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFReadDirectory</big></p>
</td>
<td width="67%">
<p><big>read the next directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFReadEncodedStrip</big></p>
</td>
<td width="67%">
<p><big>read and decode a strip of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFReadEncodedTile</big></p>
</td>
<td width="67%">
<p><big>read and decode a tile of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFReadRawStrip</big></p>
</td>
<td width="67%">
<p><big>read a raw strip of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFReadRawTile</big></p>
</td>
<td width="67%">
<p><big>read a raw tile of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFReadRGBAImage</big></p>
</td>
<td width="67%">
<p><big>read an image into a fixed format raster</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFReadScanline</big></p>
</td>
<td width="67%">
<p><big>read and decode a row of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFReadTile</big></p>
</td>
<td width="67%">
<p><big>read and decode a tile of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFRegisterCODEC</big></p>
</td>
<td width="67%">
<p><big>override standard codec for the specific
scheme</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFReverseBits</big></p>
</td>
<td width="67%">
<p><big>reverse bits in an array of bytes</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFRGBAImageBegin</big></p>
</td>
<td width="67%">
<p><big>setup decoder state for TIFFRGBAImageGet</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFRGBAImageEnd</big></p>
</td>
<td width="67%">
<p><big>release TIFFRGBAImage decoder state</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFRGBAImageGet</big></p>
</td>
<td width="67%">
<p><big>read and decode an image</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFRGBAImageOK</big></p>
</td>
<td width="67%">
<p><big>is image readable by TIFFRGBAImageGet</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFScanlineSize</big></p>
</td>
<td width="67%">
<p><big>return size of a scanline</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFSetDirectory</big></p>
</td>
<td width="67%">
<p><big>set the current directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFSetSubDirectory</big></p>
</td>
<td width="67%">
<p><big>set the current directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFSetErrorHandler</big></p>
</td>
<td width="67%">
<p><big>set error handler function</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFSetField</big></p>
</td>
<td width="67%">
<p><big>set a tag’s value in the current
directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFSetWarningHandler</big></p>
</td>
<td width="67%">
<p><big>set warning handler function</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFStripSize</big></p>
</td>
<td width="67%">
<p><big>returns size of a strip</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFRawStripSize</big></p>
</td>
<td width="67%">
<p><big>returns the number of bytes in a raw
strip</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFSwabShort</big></p>
</td>
<td width="67%">
<p><big>swap bytes of short</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFSwabLong</big></p>
</td>
<td width="67%">
<p><big>swap bytes of long</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFSwabArrayOfShort</big></p>
</td>
<td width="67%">
<p><big>swap bytes of an array of shorts</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFSwabArrayOfLong</big></p>
</td>
<td width="67%">
<p><big>swap bytes of an array of longs</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFTileRowSize</big></p>
</td>
<td width="67%">
<p><big>return size of a row in a tile</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFTileSize</big></p>
</td>
<td width="67%">
<p><big>return size of a tile</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFUnRegisterCODEC</big></p>
</td>
<td width="67%">
<p><big>unregisters the codec</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFVGetField</big></p>
</td>
<td width="67%">
<p><big>return tag value in current directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFVGetFieldDefaulted</big></p>
</td>
<td width="67%">
<p><big>return tag value in current directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFVSetField</big></p>
</td>
<td width="67%">
<p><big>set a tag’s value in the current
directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFVStripSize</big></p>
</td>
<td width="67%">
<p><big>returns the number of bytes in a strip</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFWarning</big></p>
</td>
<td width="67%">
<p><big>library warning handler</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFWriteDirectory</big></p>
</td>
<td width="67%">
<p><big>write the current directory</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFWriteEncodedStrip</big></p>
</td>
<td width="67%">
<p><big>compress and write a strip of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFWriteEncodedTile</big></p>
</td>
<td width="67%">
<p><big>compress and write a tile of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFWriteRawStrip</big></p>
</td>
<td width="67%">
<p><big>write a raw strip of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFWriteRawTile</big></p>
</td>
<td width="67%">
<p><big>write a raw tile of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFWriteScanline</big></p>
</td>
<td width="67%">
<p><big>write a scanline of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFWriteTile</big></p>
</td>
<td width="67%">
<p><big>compress and write a tile of data</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFXYZToRGB</big></p>
</td>
<td width="67%">
<p><big>perform CIE XYZ to RGB conversion</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFYCbCrToRGBInit</big></p>
</td>
<td width="67%">
<p><big>initialize YCbCr to RGB conversion state</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>TIFFYCbCrtoRGB</big></p>
</td>
<td width="67%">
<p><big>perform YCbCr to RGB conversion</big></p>
</td>
</table>
<!-- INDENTATION -->
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cols="2" cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="8%"></td>
<td width="91%">
<p><big>Auxiliary functions:</big></p></td>
</table>
<!-- TABS -->
<table width="100%" border=0 rules="none" frame="void"
cols="3" cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>_TIFFfree</big></p>
</td>
<td width="67%">
<p><big>free memory buffer</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>_TIFFmalloc</big></p>
</td>
<td width="67%">
<p><big>dynamically allocate memory buffer</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>_TIFFmemcmp</big></p>
</td>
<td width="67%">
<p><big>compare contents of the memory buffers</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>_TIFFmemcpy</big></p>
</td>
<td width="67%">
<p><big>copy contents of the one buffer to
another</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>_TIFFmemset</big></p>
</td>
<td width="67%">
<p><big>fill memory buffer with a constant byte</big></p>
</td>
<tr valign="top" align="left">
<td width="8%"></td>
<td width="23%">
<p><big>_TIFFrealloc</big></p>
</td>
<td width="67%">
<p><big>dynamically reallocate memory buffer</big></p>
</td>
</table>
<a name="TAG USAGE"></a>
<h2>TAG USAGE</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>The table below lists the</big> TIFF <big>tags that
are recognized and handled by the library. If no use is
indicated in the table, then the library reads and writes
the tag, but does not use it internally. Note that some tags
are meaningful only when a particul