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, respectively.
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/