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<!-- Creator : groff version 1.18.1 --> <!-- CreationDate: Sat Feb 24 18:37:18 2007 --> <html> <head> <meta name="generator" content="groff -Thtml, see www.gnu.org"> <meta name="Content-Style" content="text/css"> <title>SWAB</title> </head> <body> <h1 align=center>SWAB</h1> <a href="#NAME">NAME</a><br> <a href="#SYNOPSIS">SYNOPSIS</a><br> <a href="#DESCRIPTION">DESCRIPTION</a><br> <a href="#DIAGNOSTICS">DIAGNOSTICS</a><br> <a href="#SEE ALSO">SEE ALSO</a><br> <hr> <a name="NAME"></a> <h2>NAME</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p>TIFFGetBitRevTable, TIFFReverseBits, TIFFSwabShort, TIFFSwabLong, TIFFSwabArrayOfShort, TIFFSwabArrayOfLong − byte- and bit-swapping routines</p> </td> </table> <a name="SYNOPSIS"></a> <h2>SYNOPSIS</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p><b>#include <tiffio.h></b></p> <!-- INDENTATION --> <p><b>const unsigned char* TIFFGetBitRevTable(int</b> <i>reversed</i><b>)<br> void TIFFReverseBits(u_char *</b><i>data</i><b>, unsigned long</b> <i>nbytes</i><b>)<br> void TIFFSwabShort(uint16 *</b><i>data</i><b>)<br> void TIFFSwabLong(uint32 *</b><i>data</i><b>)<br> void TIFFSwabArrayOfShort(uint16 *</b><i>data</i><b>, unsigned long</b> <i>nshorts</i><b>)<br> void TIFFSwabArrayOfLong(uint32 *</b><i>data</i><b>, unsigned long</b> <i>nlongs</i><b>)</b></p> </td> </table> <a name="DESCRIPTION"></a> <h2>DESCRIPTION</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p>The following routines are used by the library to swap 16- and 32-bit data and to reverse the order of bits in bytes.</p> <!-- INDENTATION --> <p><i>TIFFSwabShort</i> and <i>TIFFSwabLong</i> swap the bytes in a single 16-bit and 32-bit item, respectively. <i>TIFFSwabArrayOfShort</i> and <i>TIFFSwabArrayOfLong</i> swap the bytes in an array of 16-bit and 32-bit items, respectively.</p> <!-- INDENTATION --> <p><i>TIFFReverseBits</i> replaces each byte in <i>data</i> with the equivalent bit-reversed value. This operation is performed with a lookup table, which is returned using the <i>TIFFGetBitRevTable</i> function. <i>reversed</i> parameter specifies which table should be returned. Supply <i>1</i> if you want bit reversal table. Supply <i>0</i> to get the table that do not reverse bit values. It is a lookup table that can be used as an <i>identity function</i>; i.e. <i>TIFFNoBitRevTable[n] == n</i>.</p> </td> </table> <a name="DIAGNOSTICS"></a> <h2>DIAGNOSTICS</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p>None.</p> </td> </table> <a name="SEE ALSO"></a> <h2>SEE ALSO</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p><b>libtiff</b>(3TIFF)</p> <!-- INDENTATION --> <p>Libtiff library home page: <b>http://www.remotesensing.org/libtiff/</b></p> </td> </table> <hr> </body> </html>
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