TIFFswab(3tiff) - phpMan

SWAB(3TIFF)                                                                           SWAB(3TIFF)



NAME
       TIFFGetBitRevTable,  TIFFReverseBits,  TIFFSwabShort,  TIFFSwabLong, TIFFSwabArrayOfShort,
       TIFFSwabArrayOfLong - byte- and bit-swapping routines

SYNOPSIS
       #include <tiffio.h>

       const unsigned char* TIFFGetBitRevTable(int reversed)
       void TIFFReverseBits(u_char *data, unsigned long nbytes)
       void TIFFSwabShort(uint16 *data)
       void TIFFSwabLong(uint32 *data)
       void TIFFSwabArrayOfShort(uint16 *data, unsigned long nshorts)
       void TIFFSwabArrayOfLong(uint32 *data, unsigned long nlongs)

DESCRIPTION
       The following routines are used by the library to swap 16- and 32-bit data and to  reverse
       the order of bits in bytes.

       TIFFSwabShort  and TIFFSwabLong swap the bytes in a single 16-bit and 32-bit item, respec-
       tively.  TIFFSwabArrayOfShort and TIFFSwabArrayOfLong swap the bytes in an array of 16-bit
       and 32-bit items, respectively.

       TIFFReverseBits  replaces  each  byte in data with the equivalent bit-reversed value. This
       operation is performed with a lookup table, which is returned using the TIFFGetBitRevTable
       function.   reversed  parameter  specifies which table should be returned. Supply 1 if you
       want bit reversal table. Supply 0 to get the table that do not reverse bit values. It is a
       lookup table that can be used as an identity function; i.e.  TIFFNoBitRevTable[n] == n.

DIAGNOSTICS
       None.

SEE ALSO
       libtiff(3TIFF)

       Libtiff library home page: http://www.remotesensing.org/libtiff/



libtiff                                 November 04, 2004                             SWAB(3TIFF)

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