TIFFReadRawTile¶
Synopsis¶
#include <tiffio.h>
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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;
TIFFReadRawTile() returns -1 if an error was encountered.
Diagnostics¶
All error messages are directed to the TIFFErrorExtR() routine.
See also¶
TIFFOpen (3tiff), TIFFReadEncodedTile (3tiff), TIFFReadTile (3tiff), TIFFtile (3tiff), libtiff (3tiff)