TIFFReadTile(3TIFF)                                        TIFFReadTile(3TIFF)



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

SYNOPSIS
       #include <tiffio.h>

       tsize_t TIFFReadTile(TIFF *tif, tdata_t buf, uint32 x, uint32 y, uint32
       z, tsample_t sample)

DESCRIPTION
       Return the data for the tile containing the specified coordinates. The
       data placed in buf are returned decompressed and, typically, in the
       native byte- and bit-ordering, but are otherwise packed (see further
       below). The buffer must be large enough to hold an entire tile of data.
       Applications should call the routine TIFFTileSize to find out the size
       (in bytes) of a tile buffer. The x and y parameters are always used by
       TIFFReadTile.  The z parameter is used if the image is deeper than 1
       slice (ImageDepth>1).  The sample parameter is used only if data are
       organized in separate planes (PlanarConfiguration=2).

NOTES
       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
       TIFFReadTile returns -1 if it detects an error; otherwise the number of
       bytes in the decoded tile is returned.

DIAGNOSTICS
       All error messages are directed to the TIFFError(3TIFF) routine.

SEE ALSO
       TIFFCheckTile(3TIFF), TIFFComputeTile(3TIFF), TIFFOpen(3TIFF),
       TIFFReadEncodedTile(3TIFF), TIFFReadRawTile(3TIFF), libtiff(3TIFF)

       Libtiff library home page: http://www.remotesensing.org/libtiff/



libtiff                        December 16, 1991           TIFFReadTile(3TIFF)
