| 1 | <!-- Creator : groff version 1.18.1 -->
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| 2 | <!-- CreationDate: Fri Jul 13 17:43:16 2007 -->
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| 3 | <html>
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| 4 | <head>
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| 5 | <meta name="generator" content="groff -Thtml, see www.gnu.org">
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| 6 | <meta name="Content-Style" content="text/css">
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| 7 | <title>TIFFReadTile</title>
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| 8 | </head>
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| 9 | <body>
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| 10 |
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| 11 | <h1 align=center>TIFFReadTile</h1>
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| 12 | <a href="#NAME">NAME</a><br>
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| 13 | <a href="#SYNOPSIS">SYNOPSIS</a><br>
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| 14 | <a href="#DESCRIPTION">DESCRIPTION</a><br>
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| 15 | <a href="#NOTES">NOTES</a><br>
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| 16 | <a href="#RETURN VALUES">RETURN VALUES</a><br>
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| 17 | <a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
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| 18 | <a href="#SEE ALSO">SEE ALSO</a><br>
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| 19 |
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| 20 | <hr>
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| 21 | <a name="NAME"></a>
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| 22 | <h2>NAME</h2>
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| 23 | <!-- INDENTATION -->
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| 24 | <table width="100%" border=0 rules="none" frame="void"
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| 25 | cols="2" cellspacing="0" cellpadding="0">
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| 26 | <tr valign="top" align="left">
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| 27 | <td width="8%"></td>
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| 28 | <td width="91%">
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| 29 | <p>TIFFReadTile − read and decode a tile of data from
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| 30 | an open <small>TIFF</small> file</p>
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| 31 | </td>
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| 32 | </table>
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| 33 | <a name="SYNOPSIS"></a>
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| 34 | <h2>SYNOPSIS</h2>
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| 35 | <!-- INDENTATION -->
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| 39 | <td width="8%"></td>
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| 40 | <td width="91%">
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| 41 | <p><b>#include <tiffio.h></b></p>
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| 42 | <!-- INDENTATION -->
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| 43 | <p><b>tsize_t TIFFReadTile(TIFF *</b><i>tif</i><b>,
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| 44 | tdata_t</b> <i>buf</i><b>, uint32</b> <i>x</i><b>,
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| 45 | uint32</b> <i>y</i><b>, uint32</b> <i>z</i><b>,
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| 46 | tsample_t</b> <i>sample</i><b>)</b></p>
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| 47 | </td>
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| 48 | </table>
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| 49 | <a name="DESCRIPTION"></a>
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| 50 | <h2>DESCRIPTION</h2>
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| 51 | <!-- INDENTATION -->
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| 52 | <table width="100%" border=0 rules="none" frame="void"
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| 53 | cols="2" cellspacing="0" cellpadding="0">
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| 55 | <td width="8%"></td>
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| 56 | <td width="91%">
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| 57 | <p>Return the data for the tile <i>containing</i> the
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| 58 | specified coordinates. The data placed in <i>buf</i> are
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| 59 | returned decompressed and, typically, in the native byte-
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| 60 | and bit-ordering, but are otherwise packed (see further
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| 61 | below). The buffer must be large enough to hold an entire
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| 62 | tile of data. Applications should call the routine
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| 63 | <i>TIFFTileSize</i> to find out the size (in bytes) of a
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| 64 | tile buffer. The <i>x</i> and <i>y</i> parameters are always
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| 65 | used by <i>TIFFReadTile</i>. The <i>z</i> parameter is used
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| 66 | if the image is deeper than 1 slice
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| 67 | (<i>ImageDepth</i>>1). The <i>sample</i> parameter is
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| 68 | used only if data are organized in separate planes
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| 69 | (<i>PlanarConfiguration</i>=2).</p>
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| 70 | </td>
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| 71 | </table>
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| 72 | <a name="NOTES"></a>
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| 73 | <h2>NOTES</h2>
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| 74 | <!-- INDENTATION -->
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| 78 | <td width="8%"></td>
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| 79 | <td width="91%">
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| 80 | <p>The library attempts to hide bit- and byte-ordering
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| 81 | differences between the image and the native machine by
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| 82 | converting data to the native machine order. Bit reversal is
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| 83 | done if the <i>FillOrder</i> tag is opposite to the native
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| 84 | machine bit order. 16- and 32-bit samples are automatically
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| 85 | byte-swapped if the file was written with a byte order
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| 86 | opposite to the native machine byte order,</p>
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| 87 | </td>
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| 88 | </table>
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| 89 | <a name="RETURN VALUES"></a>
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| 90 | <h2>RETURN VALUES</h2>
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| 91 | <!-- INDENTATION -->
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| 95 | <td width="8%"></td>
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| 96 | <td width="91%">
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| 97 | <p><i>TIFFReadTile</i> returns −1 if it detects an
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| 98 | error; otherwise the number of bytes in the decoded tile is
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| 99 | returned.</p>
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| 100 | </td>
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| 101 | </table>
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| 102 | <a name="DIAGNOSTICS"></a>
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| 103 | <h2>DIAGNOSTICS</h2>
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| 104 | <!-- INDENTATION -->
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| 106 | cols="2" cellspacing="0" cellpadding="0">
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| 107 | <tr valign="top" align="left">
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| 108 | <td width="8%"></td>
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| 109 | <td width="91%">
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| 110 | <p>All error messages are directed to the
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| 111 | <b>TIFFError</b>(3TIFF) routine.</p>
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| 112 | </td>
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| 113 | </table>
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| 114 | <a name="SEE ALSO"></a>
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| 115 | <h2>SEE ALSO</h2>
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| 116 | <!-- INDENTATION -->
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| 117 | <table width="100%" border=0 rules="none" frame="void"
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| 118 | cols="2" cellspacing="0" cellpadding="0">
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| 120 | <td width="8%"></td>
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| 121 | <td width="91%">
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| 122 | <p><b>TIFFCheckTile</b>(3TIFF),
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| 123 | <b>TIFFComputeTile</b>(3TIFF), <b>TIFFOpen</b>(3TIFF),
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| 124 | <b>TIFFReadEncodedTile</b>(3TIFF),
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| 125 | <b>TIFFReadRawTile</b>(3TIFF), <b>libtiff</b>(3TIFF)</p>
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| 126 | <!-- INDENTATION -->
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| 127 | <p>Libtiff library home page:
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| 128 | <b>http://www.remotesensing.org/libtiff/</b></p>
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| 129 | </td>
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| 130 | </table>
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| 131 | <hr>
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| 132 | </body>
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| 133 | </html>
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