redhat man page for tiffreadtile

TIFFReadTile(3T)														  TIFFReadTile(3T)

NAME
       TIFFReadTile - read and decode a tile of data from an open TIFF file

SYNOPSIS
       #include <tiffio.h>
       tsize_t TIFFReadTile(TIFF* tif, tdata_t buf, uint32 x, uint32 y, uint32 z, tsample_t sample)

DESCRIPTION
       Return the data for the tile containing the specified coordinates.  The data placed in buf are returned decompressed and, typically, in the
       native byte- and bit-ordering, but are otherwise packed (see further below).  The buffer must be large enough to hold  an  entire  tile	of
       data.   Applications  should  call  the	routine TIFFTileSize to find out the size (in bytes) of a tile buffer.	The x and y parameters are
       always used by TIFFReadTile.  The z parameter is used if the image is deeper than 1 slice (ImageDepth>1).  The  sample  parameter  is  used
       only if data are organized in separate planes (PlanarConfiguration=2).

NOTES
       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 automat-
       ically byte-swapped if the file was written with a byte order opposite to the native machine byte order,

RETURN VALUES
       TIFFReadTile returns -1 if it detects an error; otherwise the number of bytes in the decoded tile is returned.

DIAGNOSTICS
       All error messages are directed to the TIFFError(3T) routine.

SEE ALSO
       libtiff(3T), TIFFCheckTile(3T), TIFFComputeTile(3T), TIFFOpen(3T), TIFFReadEncodedTile(3T), TIFFReadRawTile(3T)

								 December 16, 1991						  TIFFReadTile(3T)