| 1 | <!-- Creator : groff version 1.18.1 -->
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| 2 | <!-- CreationDate: Fri Jul 13 17:43:17 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>SWAB</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>SWAB</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="#DIAGNOSTICS">DIAGNOSTICS</a><br>
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| 16 | <a href="#SEE ALSO">SEE ALSO</a><br>
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| 17 |
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| 18 | <hr>
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| 19 | <a name="NAME"></a>
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| 20 | <h2>NAME</h2>
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| 21 | <!-- INDENTATION -->
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| 22 | <table width="100%" border=0 rules="none" frame="void"
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| 23 | cols="2" cellspacing="0" cellpadding="0">
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| 24 | <tr valign="top" align="left">
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| 25 | <td width="8%"></td>
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| 26 | <td width="91%">
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| 27 | <p>TIFFGetBitRevTable, TIFFReverseBits, TIFFSwabShort,
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| 28 | TIFFSwabLong, TIFFSwabArrayOfShort, TIFFSwabArrayOfLong
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| 29 | − byte- and bit-swapping routines</p>
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| 30 | </td>
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| 31 | </table>
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| 32 | <a name="SYNOPSIS"></a>
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| 33 | <h2>SYNOPSIS</h2>
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| 34 | <!-- INDENTATION -->
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| 35 | <table width="100%" border=0 rules="none" frame="void"
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| 36 | cols="2" cellspacing="0" cellpadding="0">
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| 37 | <tr valign="top" align="left">
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| 38 | <td width="8%"></td>
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| 39 | <td width="91%">
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| 40 | <p><b>#include <tiffio.h></b></p>
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| 41 | <!-- INDENTATION -->
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| 42 | <p><b>const unsigned char* TIFFGetBitRevTable(int</b>
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| 43 | <i>reversed</i><b>)<br>
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| 44 | void TIFFReverseBits(u_char *</b><i>data</i><b>, unsigned
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| 45 | long</b> <i>nbytes</i><b>)<br>
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| 46 | void TIFFSwabShort(uint16 *</b><i>data</i><b>)<br>
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| 47 | void TIFFSwabLong(uint32 *</b><i>data</i><b>)<br>
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| 48 | void TIFFSwabArrayOfShort(uint16 *</b><i>data</i><b>,
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| 49 | unsigned long</b> <i>nshorts</i><b>)<br>
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| 50 | void TIFFSwabArrayOfLong(uint32 *</b><i>data</i><b>,
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| 51 | unsigned long</b> <i>nlongs</i><b>)</b></p>
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| 52 | </td>
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| 53 | </table>
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| 54 | <a name="DESCRIPTION"></a>
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| 55 | <h2>DESCRIPTION</h2>
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| 56 | <!-- INDENTATION -->
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| 57 | <table width="100%" border=0 rules="none" frame="void"
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| 58 | cols="2" cellspacing="0" cellpadding="0">
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| 59 | <tr valign="top" align="left">
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| 60 | <td width="8%"></td>
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| 61 | <td width="91%">
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| 62 | <p>The following routines are used by the library to swap
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| 63 | 16- and 32-bit data and to reverse the order of bits in
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| 64 | bytes.</p>
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| 65 | <!-- INDENTATION -->
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| 66 | <p><i>TIFFSwabShort</i> and <i>TIFFSwabLong</i> swap the
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| 67 | bytes in a single 16-bit and 32-bit item, respectively.
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| 68 | <i>TIFFSwabArrayOfShort</i> and <i>TIFFSwabArrayOfLong</i>
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| 69 | swap the bytes in an array of 16-bit and 32-bit items,
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| 70 | respectively.</p>
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| 71 | <!-- INDENTATION -->
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| 72 | <p><i>TIFFReverseBits</i> replaces each byte in <i>data</i>
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| 73 | with the equivalent bit-reversed value. This operation is
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| 74 | performed with a lookup table, which is returned using the
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| 75 | <i>TIFFGetBitRevTable</i> function. <i>reversed</i>
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| 76 | parameter specifies which table should be returned. Supply
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| 77 | <i>1</i> if you want bit reversal table. Supply <i>0</i> to
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| 78 | get the table that do not reverse bit values. It is a lookup
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| 79 | table that can be used as an <i>identity function</i>; i.e.
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| 80 | <i>TIFFNoBitRevTable[n] == n</i>.</p>
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| 81 | </td>
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| 82 | </table>
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| 83 | <a name="DIAGNOSTICS"></a>
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| 84 | <h2>DIAGNOSTICS</h2>
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| 85 | <!-- INDENTATION -->
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| 86 | <table width="100%" border=0 rules="none" frame="void"
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| 87 | cols="2" cellspacing="0" cellpadding="0">
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| 88 | <tr valign="top" align="left">
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| 89 | <td width="8%"></td>
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| 90 | <td width="91%">
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| 91 | <p>None.</p>
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| 92 | </td>
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| 93 | </table>
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| 94 | <a name="SEE ALSO"></a>
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| 95 | <h2>SEE ALSO</h2>
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| 96 | <!-- INDENTATION -->
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| 97 | <table width="100%" border=0 rules="none" frame="void"
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| 98 | cols="2" cellspacing="0" cellpadding="0">
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| 99 | <tr valign="top" align="left">
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| 100 | <td width="8%"></td>
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| 101 | <td width="91%">
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| 102 | <p><b>libtiff</b>(3TIFF)</p>
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| 103 | <!-- INDENTATION -->
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| 104 | <p>Libtiff library home page:
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| 105 | <b>http://www.remotesensing.org/libtiff/</b></p>
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| 106 | </td>
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| 107 | </table>
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| 108 | <hr>
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| 109 | </body>
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| 110 | </html>
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