2002-10-07 09:47:36 -04:00
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<title>TIFFReadEncodedTile</title>
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<h1 align=center>TIFFReadEncodedTile</h1>
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<a href="#NAME">NAME</a><br>
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<a href="#SYNOPSIS">SYNOPSIS</a><br>
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<a href="#DESCRIPTION">DESCRIPTION</a><br>
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<a href="#NOTES">NOTES</a><br>
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<a href="#RETURN VALUES">RETURN VALUES</a><br>
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<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
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<a href="#SEE ALSO">SEE ALSO</a><br>
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<hr>
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2003-11-27 10:07:01 -05:00
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<!-- Creator : groff version 1.17.2 -->
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2003-12-21 16:47:11 -05:00
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<!-- CreationDate: Mon Dec 22 00:39:23 2003 -->
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2002-10-07 09:47:36 -04:00
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<a name="NAME"></a>
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<h2>NAME</h2>
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2003-11-27 10:07:01 -05:00
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<table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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2003-11-27 10:07:01 -05:00
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<td width="10%"></td><td width="90%">
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TIFFReadEncodedTile - read and decode a tile of data from an open <small>TIFF</small> file</td></table>
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2002-10-07 09:47:36 -04:00
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<a name="SYNOPSIS"></a>
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<h2>SYNOPSIS</h2>
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<table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="10%"></td><td width="90%">
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<b>#include <tiffio.h><br>
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int TIFFReadEncodedTile(TIFF* tif, u_long tile, u_char* buf,
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u_long size)</b></td></table>
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<a name="DESCRIPTION"></a>
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<h2>DESCRIPTION</h2>
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<table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="10%"></td><td width="90%">
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Read the specified tile of data and place up to <i>size</i>
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bytes of decompressed information in the (user supplied)
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data buffer.</td></table>
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<a name="NOTES"></a>
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<h2>NOTES</h2>
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<table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="10%"></td><td width="90%">
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The value of <i>tile</i> is a ``raw tile number.'' That is,
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the caller must take into account whether or not the data
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are organized in separate planes
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(<i>PlanarConfiguration</i>=2). <i>TIFFComputeTile</i>
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automatically does this when converting an (x,y,z,sample)
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coordinate quadruple to a tile number. To read a full tile
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of data the data buffer should be at least as large as the
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value returned by <i>TIFFTileSize</i>.</td></table>
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<table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="10%"></td><td width="90%">
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The library attempts to hide bit- and byte-ordering
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differences between the image and the native machine by
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converting data to the native machine order. Bit reversal is
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done if the <i>FillOrder</i> tag is opposite to the native
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machine bit order. 16- and 32-bit samples are automatically
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byte-swapped if the file was written with a byte order
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opposite to the native machine byte order,</td></table>
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<a name="RETURN VALUES"></a>
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<h2>RETURN VALUES</h2>
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<table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="10%"></td><td width="90%">
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The actual number of bytes of data that were placed in
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<i>buf</i> is returned; <i>TIFFReadEncodedTile</i> returns
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-1 if an error was encountered.</td></table>
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<a name="DIAGNOSTICS"></a>
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<h2>DIAGNOSTICS</h2>
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2003-11-27 10:07:01 -05:00
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<table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="10%"></td><td width="90%">
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All error messages are directed to the <i>TIFFError</i>(3T)
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routine.</td></table>
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<a name="SEE ALSO"></a>
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<h2>SEE ALSO</h2>
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2003-11-27 10:07:01 -05:00
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<table width="100%" border=0 rules="none" frame="void"
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2002-10-07 09:47:36 -04:00
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="10%"></td><td width="90%">
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<i>libtiff</i>(3T), <i>TIFFOpen</i>(3T),
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<i>TIFFReadRawTile</i>(3T),
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<i>TIFFReadTile</i>(3T)</td></table>
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2002-10-07 09:47:36 -04:00
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<hr>
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</body>
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</html>
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