tiffreadrawtile(3)
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) coordi
nate 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(3) rou
tine.
SEE ALSO
- libtiff(3), TIFFOpen(3), TIFFReadEncodedTile(3), TIFFRead_
Tile(3), TIFFTileSize(3)