.\" $Id: TIFFReadRawTile.3tiff,v 1.2 2005-11-02 11:07:18 dron Exp $
.\"
.\" Copyright (c) 1988-1997 Sam Leffler
.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
.\"
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.\"
.if n .po 0
.TH TIFFReadRawTile 3TIFF "October 15, 1995" "libtiff"
.SH NAME
TIFFReadRawTile \- return an undecoded tile of data from an open
.SM TIFF
file
.SH SYNOPSIS
.B "#include <tiffio.h>"
.sp
.BI "tsize_t TIFFReadRawTile(TIFF *" tif ", ttile_t " tile ", tdata_t " buf ", tsize_t " size ")"
.SH DESCRIPTION
Read the contents of the specified tile into the (user supplied) data buffer.
Note that the value of
.I tile
is a ``raw tile number.'' That is, the caller must take into account whether
or not the data is organized in separate planes (\c
.IR PlanarConfiguration =2).
.I 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 typically
be at least as large as the value returned by
.IR TIFFTileSize .
.SH "RETURN VALUES"
The actual number of bytes of data that were placed in
.I buf
is returned;
.IR TIFFReadEncodedTile
returns \-1 if an error was encountered.
.SH DIAGNOSTICS
All error messages are directed to the
.BR TIFFError (3TIFF)
routine.
.SH "SEE ALSO"
.BR TIFFOpen (3TIFF),
.BR TIFFReadEncodedTile (3TIFF),
.BR TIFFReadTile (3TIFF),
.BR TIFFTileSize (3TIFF),
.BR libtiff (3TIFF)
.PP
Libtiff library home page:
.BR http://www.remotesensing.org/libtiff/