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15<title>TIFFReadEncodedTile</title>
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19
20<h1 align=center>TIFFReadEncodedTile</h1>
21
22<a href="#NAME">NAME</a><br>
23<a href="#SYNOPSIS">SYNOPSIS</a><br>
24<a href="#DESCRIPTION">DESCRIPTION</a><br>
25<a href="#NOTES">NOTES</a><br>
26<a href="#RETURN VALUES">RETURN VALUES</a><br>
27<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
28<a href="#SEE ALSO">SEE ALSO</a><br>
29
30<hr>
31
32
33<a name="NAME"></a>
34<h2>NAME</h2>
35
36
37
38<p style="margin-left:11%; margin-top: 1em">TIFFReadEncodedTile
39&minus; read and decode a tile of data from an open
40<small>TIFF</small> file</p>
41
42<a name="SYNOPSIS"></a>
43<h2>SYNOPSIS</h2>
44
45
46<p style="margin-left:11%; margin-top: 1em"><b>#include
47&lt;tiffio.h&gt;</b></p>
48
49<p style="margin-left:11%; margin-top: 1em"><b>int
50TIFFReadEncodedTile(TIFF *</b><i>tif</i><b>, u_long</b>
51<i>tile</i><b>, u_char *</b><i>buf</i><b>, u_long</b>
52<i>size</i><b>)</b></p>
53
54<a name="DESCRIPTION"></a>
55<h2>DESCRIPTION</h2>
56
57
58<p style="margin-left:11%; margin-top: 1em">Read the
59specified tile of data and place up to <i>size</i> bytes of
60decompressed information in the (user supplied) data
61buffer.</p>
62
63<a name="NOTES"></a>
64<h2>NOTES</h2>
65
66
67<p style="margin-left:11%; margin-top: 1em">The value of
68<i>tile</i> is a &lsquo;&lsquo;raw tile
69number.&rsquo;&rsquo; That is, the caller must take into
70account whether or not the data are organized in separate
71planes (<i>PlanarConfiguration</i>=2).
72<i>TIFFComputeTile</i> automatically does this when
73converting an (x,y,z,sample) coordinate quadruple to a tile
74number. To read a full tile of data the data buffer should
75be at least as large as the value returned by
76<i>TIFFTileSize</i>.</p>
77
78<p style="margin-left:11%; margin-top: 1em">The library
79attempts to hide bit- and byte-ordering differences between
80the image and the native machine by converting data to the
81native machine order. Bit reversal is done if the
82<i>FillOrder</i> tag is opposite to the native machine bit
83order. 16- and 32-bit samples are automatically byte-swapped
84if the file was written with a byte order opposite to the
85native machine byte order,</p>
86
87<a name="RETURN VALUES"></a>
88<h2>RETURN VALUES</h2>
89
90
91<p style="margin-left:11%; margin-top: 1em">The actual
92number of bytes of data that were placed in <i>buf</i> is
93returned; <i>TIFFReadEncodedTile</i> returns &minus;1 if an
94error was encountered.</p>
95
96<a name="DIAGNOSTICS"></a>
97<h2>DIAGNOSTICS</h2>
98
99
100<p style="margin-left:11%; margin-top: 1em">All error
101messages are directed to the <b>TIFFError</b>(3TIFF)
102routine.</p>
103
104<a name="SEE ALSO"></a>
105<h2>SEE ALSO</h2>
106
107
108
109<p style="margin-left:11%; margin-top: 1em"><b>TIFFOpen</b>(3TIFF),
110<b>TIFFReadRawTile</b>(3TIFF), <b>TIFFReadTile</b>(3TIFF),
111<b>libtiff</b>(3TIFF)</p>
112
113<p style="margin-left:11%; margin-top: 1em">Libtiff library
114home page: <b>http://www.remotesensing.org/libtiff/</b></p>
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