src/tiff/html/man/TIFFswab.3tiff.html

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  10
  11 <h1 align=center>SWAB</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="#DIAGNOSTICS">DIAGNOSTICS</a><br>
  16 <a href="#SEE ALSO">SEE ALSO</a><br>
  17
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  19 <a name="NAME"></a>
  20 <h2>NAME</h2>
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  27 <p>TIFFGetBitRevTable, TIFFReverseBits, TIFFSwabShort,
  28 TIFFSwabLong, TIFFSwabArrayOfShort, TIFFSwabArrayOfLong
  29 &minus; byte- and bit-swapping routines</p>
  30 </td>
  31 </table>
  32 <a name="SYNOPSIS"></a>
  33 <h2>SYNOPSIS</h2>
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  40 <p><b>#include &lt;tiffio.h&gt;</b></p>
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  42 <p><b>const unsigned char* TIFFGetBitRevTable(int</b>
  43 <i>reversed</i><b>)<br>
  44 void TIFFReverseBits(u_char *</b><i>data</i><b>, unsigned
  45 long</b> <i>nbytes</i><b>)<br>
  46 void TIFFSwabShort(uint16 *</b><i>data</i><b>)<br>
  47 void TIFFSwabLong(uint32 *</b><i>data</i><b>)<br>
  48 void TIFFSwabArrayOfShort(uint16 *</b><i>data</i><b>,
  49 unsigned long</b> <i>nshorts</i><b>)<br>
  50 void TIFFSwabArrayOfLong(uint32 *</b><i>data</i><b>,
  51 unsigned long</b> <i>nlongs</i><b>)</b></p>
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  54 <a name="DESCRIPTION"></a>
  55 <h2>DESCRIPTION</h2>
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  62 <p>The following routines are used by the library to swap
  63 16- and 32-bit data and to reverse the order of bits in
  64 bytes.</p>
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  66 <p><i>TIFFSwabShort</i> and <i>TIFFSwabLong</i> swap the
  67 bytes in a single 16-bit and 32-bit item, respectively.
  68 <i>TIFFSwabArrayOfShort</i> and <i>TIFFSwabArrayOfLong</i>
  69 swap the bytes in an array of 16-bit and 32-bit items,
  70 respectively.</p>
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  72 <p><i>TIFFReverseBits</i> replaces each byte in <i>data</i>
  73 with the equivalent bit-reversed value. This operation is
  74 performed with a lookup table, which is returned using the
  75 <i>TIFFGetBitRevTable</i> function. <i>reversed</i>
  76 parameter specifies which table should be returned. Supply
  77 <i>1</i> if you want bit reversal table. Supply <i>0</i> to
  78 get the table that do not reverse bit values. It is a lookup
  79 table that can be used as an <i>identity function</i>; i.e.
  80 <i>TIFFNoBitRevTable[n] == n</i>.</p>
  81 </td>
  82 </table>
  83 <a name="DIAGNOSTICS"></a>
  84 <h2>DIAGNOSTICS</h2>
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  91 <p>None.</p>
  92 </td>
  93 </table>
  94 <a name="SEE ALSO"></a>
  95 <h2>SEE ALSO</h2>
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 102 <p><b>libtiff</b>(3TIFF)</p>
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 104 <p>Libtiff library home page:
 105 <b>http://www.remotesensing.org/libtiff/</b></p>
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