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 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
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.remotesensing.org/libtiff/