TIFFReadTile man page on QNX

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TIFFReadTile(3TIFF)					   TIFFReadTile(3TIFF)

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

       #include <tiffio.h>

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

       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).

       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 automati‐
       cally byte-swapped if the file was written with a byte  order  opposite
       to the native machine byte order,

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

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

       TIFFCheckTile(3TIFF),  TIFFComputeTile(3TIFF),  TIFFOpen(3TIFF),	 TIFF‐
       ReadEncodedTile(3TIFF), TIFFReadRawTile(3TIFF), libtiff(3TIFF)

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

libtiff			       December 16, 1991	   TIFFReadTile(3TIFF)
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