The value of tile is a ‘‘raw tile
number.’’ That is, the caller must take into
account whether or not the data are organized in separate
planes (PlanarConfiguration=2).
TIFFComputeTile automatically does this when
converting an (x,y,z,sample) coordinate quadruple to a tile
number. To read a full tile of data the data buffer should
be at least as large as the value returned by
TIFFTileSize.
The library attempts to hide bit- and byte-ordering
differences between the image and the native machine by
converting data to the native machine order. Bit reversal is
done if the FillOrder tag is opposite to the native
machine bit order. 16- and 32-bit samples are automatically
byte-swapped if the file was written with a byte order
opposite to the native machine byte order,
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