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.
|