TIFFReadEncodedTile(3T)              Image Format Library C++ Reference Manual



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

SYNOPSIS
     #include <tiffio.h>
     int TIFFReadEncodedTile(TIFF* tif, ulong tile, uchar* buf, ulong 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 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,

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) routine.

SEE ALSO
     libtiff(3T), TIFFOpen(3T), TIFFReadRawTile(3T), TIFFReadTile(3T)



















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