TIFFReadRawTile - return an undecoded tile of data from an open TIFF file
#include <tiffio.h> tsize_t TIFFReadRawTile(TIFF *tif, ttile_t tile, tdata_t buf, tsize_t size)
TIFFReadRawTile(3TIFF) TIFFReadRawTile(3TIFF)
NAME
TIFFReadRawTile - return an undecoded tile of data from an open TIFF
file
SYNOPSIS
#include <tiffio.h>
tsize_t TIFFReadRawTile(TIFF *tif, ttile_t tile, tdata_t buf, tsize_t
size)
DESCRIPTION
Read the contents of the specified tile into the (user supplied) data
buffer. Note that the value of tile is a ``raw tile number.'' That is,
the caller must take into account whether or not the data is organized
in separate planes (PlanarConfiguration=2). TIFFComputeTile automati-
cally 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 TIFFTileSize.
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(3TIFF) routine.
SEE ALSO
TIFFOpen(3TIFF), TIFFReadEncodedTile(3TIFF), TIFFReadTile(3TIFF),
TIFFTileSize(3TIFF), libtiff(3TIFF)
Libtiff library home page: http://www.simplesystems.org/libtiff/
libtiff October 15, 1995 TIFFReadRawTile(3TIFF)