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<title>TIFFReadEncodedTile</title>
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</head>
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<body>
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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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<a name="NAME"></a>
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<h2>NAME</h2>
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<p style="margin-left:11%; margin-top: 1em">TIFFReadEncodedTile
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− read and decode a tile of data from an open
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<small>TIFF</small> file</p>
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<a name="SYNOPSIS"></a>
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<h2>SYNOPSIS</h2>
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<p style="margin-left:11%; margin-top: 1em"><b>#include
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<tiffio.h></b></p>
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<p style="margin-left:11%; margin-top: 1em"><b>int
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TIFFReadEncodedTile(TIFF *</b><i>tif</i><b>, u_long</b>
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<i>tile</i><b>, u_char *</b><i>buf</i><b>, u_long</b>
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<i>size</i><b>)</b></p>
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<a name="DESCRIPTION"></a>
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<h2>DESCRIPTION</h2>
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<p style="margin-left:11%; margin-top: 1em">Read the
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specified tile of data and place up to <i>size</i> bytes of
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decompressed information in the (user supplied) data
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buffer.</p>
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<a name="NOTES"></a>
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<h2>NOTES</h2>
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<p style="margin-left:11%; margin-top: 1em">The value of
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<i>tile</i> is a ‘‘raw tile
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number.’’ That is, the caller must take into
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account whether or not the data are organized in separate
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planes (<i>PlanarConfiguration</i>=2).
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<i>TIFFComputeTile</i> automatically does this when
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converting an (x,y,z,sample) coordinate quadruple to a tile
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number. To read a full tile of data the data buffer should
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be at least as large as the value returned by
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<i>TIFFTileSize</i>.</p>
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<p style="margin-left:11%; margin-top: 1em">The library
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attempts to hide bit- and byte-ordering differences between
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the image and the native machine by converting data to the
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native machine order. Bit reversal is done if the
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<i>FillOrder</i> tag is opposite to the native machine bit
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order. 16- and 32-bit samples are automatically byte-swapped
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if the file was written with a byte order opposite to the
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native machine byte order,</p>
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<a name="RETURN VALUES"></a>
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<h2>RETURN VALUES</h2>
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<p style="margin-left:11%; margin-top: 1em">The actual
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number of bytes of data that were placed in <i>buf</i> is
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returned; <i>TIFFReadEncodedTile</i> returns −1 if an
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error was encountered.</p>
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<a name="DIAGNOSTICS"></a>
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<h2>DIAGNOSTICS</h2>
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<p style="margin-left:11%; margin-top: 1em">All error
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messages are directed to the <b>TIFFError</b>(3TIFF)
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routine.</p>
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<a name="SEE ALSO"></a>
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<h2>SEE ALSO</h2>
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<p style="margin-left:11%; margin-top: 1em"><b>TIFFOpen</b>(3TIFF),
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<b>TIFFReadRawTile</b>(3TIFF), <b>TIFFReadTile</b>(3TIFF),
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<b>libtiff</b>(3TIFF)</p>
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<p style="margin-left:11%; margin-top: 1em">Libtiff library
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home page: <b>http://www.remotesensing.org/libtiff/</b></p>
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