| author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
| Mon, 04 Oct 2010 01:19:32 +0300 | |
| changeset 37 | 758a864f9613 |
| parent 30 | 5dc02b23752f |
| permissions | -rw-r--r-- |
| 0 | 1 |
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Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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<meta name="generator" content="groff -Thtml, see www.gnu.org"> |
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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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<a name="NAME"></a> |
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<h2>NAME</h2> |
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<p>TIFFGetBitRevTable, TIFFReverseBits, TIFFSwabShort, |
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TIFFSwabLong, TIFFSwabArrayOfShort, TIFFSwabArrayOfLong |
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− byte- and bit-swapping routines</p> |
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</table> |
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<a name="SYNOPSIS"></a> |
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<h2>SYNOPSIS</h2> |
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<p><b>#include <tiffio.h></b></p> |
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<p><b>const unsigned char* TIFFGetBitRevTable(int</b> |
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<i>reversed</i><b>)<br> |
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void TIFFReverseBits(u_char *</b><i>data</i><b>, unsigned |
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long</b> <i>nbytes</i><b>)<br> |
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void TIFFSwabShort(uint16 *</b><i>data</i><b>)<br> |
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void TIFFSwabLong(uint32 *</b><i>data</i><b>)<br> |
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void TIFFSwabArrayOfShort(uint16 *</b><i>data</i><b>, |
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unsigned long</b> <i>nshorts</i><b>)<br> |
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void TIFFSwabArrayOfLong(uint32 *</b><i>data</i><b>, |
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unsigned long</b> <i>nlongs</i><b>)</b></p> |
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</td> |
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</table> |
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<a name="DESCRIPTION"></a> |
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<h2>DESCRIPTION</h2> |
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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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performed with a lookup table, which is returned using the |
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<i>TIFFGetBitRevTable</i> function. <i>reversed</i> |
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parameter specifies which table should be returned. Supply |
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<i>1</i> if you want bit reversal table. Supply <i>0</i> to |
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get the table that do not reverse bit values. It is a lookup |
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table that can be used as an <i>identity function</i>; i.e. |
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<i>TIFFNoBitRevTable[n] == n</i>.</p> |
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</td> |
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</table> |
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<a name="DIAGNOSTICS"></a> |
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<h2>DIAGNOSTICS</h2> |
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<p>None.</p> |
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</table> |
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<a name="SEE ALSO"></a> |
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<h2>SEE ALSO</h2> |
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<td width="91%"> |
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<p><b>libtiff</b>(3TIFF)</p> |
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<p>Libtiff library home page: |
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<b>http://www.remotesensing.org/libtiff/</b></p> |
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</td> |
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<hr> |
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</body> |
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