TIFFReadEncodedTile man page on BSDi

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TIFFReadEncodedTile(3T)			  TIFFReadEncodedTile(3T)

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

SYNOPSIS
       #include <tiffio.h>
       int TIFFReadEncodedTile(TIFF* tif,  u_long  tile,  u_char*
       buf, u_long size)

DESCRIPTION
       Read the specified tile of data and place up to size bytes
       of decompressed information in the  (user  supplied)  data
       buffer.

NOTES
       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 dif-
       ferences between the image and the native machine by  con-
       verting 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 automati-
       cally byte-swapped if the file was  written  with  a  byte
       order opposite to the native machine byte order,

RETURN VALUES
       The actual number of bytes of data that were placed in buf
       is returned; TIFFReadEncodedTile returns -1  if	an  error
       was encountered.

DIAGNOSTICS
       All  error messages are directed to the TIFFError(3T) rou-
       tine.

SEE ALSO
       libtiff(3T), TIFFOpen(3T), TIFFReadRawTile(3T),	TIFFRead-
       Tile(3T)

			 October 15, 1995			1

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