src/tiff/html/man/TIFFReadTile.3tiff.html

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   7 <title>TIFFReadTile</title>
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  10
  11 <h1 align=center>TIFFReadTile</h1>
  12 <a href="#NAME">NAME</a><br>
  13 <a href="#SYNOPSIS">SYNOPSIS</a><br>
  14 <a href="#DESCRIPTION">DESCRIPTION</a><br>
  15 <a href="#NOTES">NOTES</a><br>
  16 <a href="#RETURN VALUES">RETURN VALUES</a><br>
  17 <a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
  18 <a href="#SEE ALSO">SEE ALSO</a><br>
  19
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  21 <a name="NAME"></a>
  22 <h2>NAME</h2>
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  29 <p>TIFFReadTile &minus; read and decode a tile of data from
  30 an open <small>TIFF</small> file</p>
  31 </td>
  32 </table>
  33 <a name="SYNOPSIS"></a>
  34 <h2>SYNOPSIS</h2>
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  41 <p><b>#include &lt;tiffio.h&gt;</b></p>
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  43 <p><b>tsize_t TIFFReadTile(TIFF *</b><i>tif</i><b>,
  44 tdata_t</b> <i>buf</i><b>, uint32</b> <i>x</i><b>,
  45 uint32</b> <i>y</i><b>, uint32</b> <i>z</i><b>,
  46 tsample_t</b> <i>sample</i><b>)</b></p>
  47 </td>
  48 </table>
  49 <a name="DESCRIPTION"></a>
  50 <h2>DESCRIPTION</h2>
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  57 <p>Return the data for the tile <i>containing</i> the
  58 specified coordinates. The data placed in <i>buf</i> are
  59 returned decompressed and, typically, in the native byte-
  60 and bit-ordering, but are otherwise packed (see further
  61 below). The buffer must be large enough to hold an entire
  62 tile of data. Applications should call the routine
  63 <i>TIFFTileSize</i> to find out the size (in bytes) of a
  64 tile buffer. The <i>x</i> and <i>y</i> parameters are always
  65 used by <i>TIFFReadTile</i>. The <i>z</i> parameter is used
  66 if the image is deeper than 1 slice
  67 (<i>ImageDepth</i>&gt;1). The <i>sample</i> parameter is
  68 used only if data are organized in separate planes
  69 (<i>PlanarConfiguration</i>=2).</p>
  70 </td>
  71 </table>
  72 <a name="NOTES"></a>
  73 <h2>NOTES</h2>
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  80 <p>The library attempts to hide bit- and byte-ordering
  81 differences between the image and the native machine by
  82 converting data to the native machine order. Bit reversal is
  83 done if the <i>FillOrder</i> tag is opposite to the native
  84 machine bit order. 16- and 32-bit samples are automatically
  85 byte-swapped if the file was written with a byte order
  86 opposite to the native machine byte order,</p>
  87 </td>
  88 </table>
  89 <a name="RETURN VALUES"></a>
  90 <h2>RETURN VALUES</h2>
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  97 <p><i>TIFFReadTile</i> returns &minus;1 if it detects an
  98 error; otherwise the number of bytes in the decoded tile is
  99 returned.</p>
 100 </td>
 101 </table>
 102 <a name="DIAGNOSTICS"></a>
 103 <h2>DIAGNOSTICS</h2>
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 110 <p>All error messages are directed to the
 111 <b>TIFFError</b>(3TIFF) routine.</p>
 112 </td>
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 114 <a name="SEE ALSO"></a>
 115 <h2>SEE ALSO</h2>
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 122 <p><b>TIFFCheckTile</b>(3TIFF),
 123 <b>TIFFComputeTile</b>(3TIFF), <b>TIFFOpen</b>(3TIFF),
 124 <b>TIFFReadEncodedTile</b>(3TIFF),
 125 <b>TIFFReadRawTile</b>(3TIFF), <b>libtiff</b>(3TIFF)</p>
 126 <!-- INDENTATION -->
 127 <p>Libtiff library home page:
 128 <b>http://www.remotesensing.org/libtiff/</b></p>
 129 </td>
 130 </table>
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