2002-10-07 09:47:36 -04:00
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<meta name="generator" content="groff -Thtml, see www.gnu.org">
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<meta name="Content-Style" content="text/css">
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<title>SWAB</title>
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<h1 align=center>SWAB</h1>
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<a href="#NAME">NAME</a><br>
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<a href="#SYNOPSIS">SYNOPSIS</a><br>
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<a href="#DESCRIPTION">DESCRIPTION</a><br>
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<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
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<a href="#SEE ALSO">SEE ALSO</a><br>
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<hr>
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<!-- Creator : groff version 1.18 -->
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<!-- CreationDate: Mon Oct 7 17:36:24 2002 -->
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<a name="NAME"></a>
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<h2>NAME</h2>
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<!-- INDENTATION -->
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<p><table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="8%"></td>
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<td width="91%">
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<p>TIFFReverseBits, TIFFSwabShort, TIFFSwabLong,
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TIFFSwabArrayOfShort, TIFFSwabArrayOfLong − byte- and
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bit-swapping routines</p>
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</td>
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</table></p>
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<a name="SYNOPSIS"></a>
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<h2>SYNOPSIS</h2>
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<p><table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="8%"></td>
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<td width="91%">
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<p><b>#include <tiffio.h><br>
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const unsigned char* TIFFGetBitRevTable(int reversed);<br>
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void TIFFReverseBits(u_char* data, unsigned long nbytes)<br>
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void TIFFSwabShort(uint16* data)<br>
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void TIFFSwabLong(uint32* data)<br>
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void TIFFSwabArrayOfShort(uint16* data, unsigned long
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nshorts)<br>
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void TIFFSwabArrayOfLong(uint32* data, unsigned long
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nlongs)</b></p>
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</td>
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</table></p>
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<a name="DESCRIPTION"></a>
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<h2>DESCRIPTION</h2>
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<p><table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="8%"></td>
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<td width="91%">
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<p>The following routines are used by the library to swap
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16- and 32-bit data and to reverse the order of bits in
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bytes.</p>
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<p><i>TIFFSwabShort</i> and <i>TIFFSwabLong</i> swap the
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bytes in a single 16-bit and 32-bit item, respectively.
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<i>TIFFSwabArrayOfShort</i> and <i>TIFFSwabArrayOfLong</i>
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swap the bytes in an array of 16-bit and 32-bit items,
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respectively.</p>
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<p><i>TIFFReverseBits</i> replaces each byte in <i>data</i>
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with the equivalent bit-reversed value. This operation is
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done with a lookup table, <i>TIFFBitRevTable</i> which is
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declared public. A second table, <i>TIFFNoBitRevTable</i> is
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also declared public; it is a lookup table that can be used
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as an <i>identity function</i>; i.e. <i>TIFFNoBitRevTable[n]
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== n</i>.</p>
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</td>
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</table></p>
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<a name="DIAGNOSTICS"></a>
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<h2>DIAGNOSTICS</h2>
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<p><table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="8%"></td>
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<td width="91%">
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<p>None.</p>
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</td>
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</table></p>
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<a name="SEE ALSO"></a>
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<h2>SEE ALSO</h2>
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<p><table width="100%" border=0 rules="none" frame="void"
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cols="2" cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="8%"></td>
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<td width="91%">
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<p><i>libtiff</i>(3T),</p>
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</td>
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</table></p>
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<hr>
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