TIFFReadRawTile

Section: Misc. Reference Manual Pages (3T)
Updated: December 16, 1991
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NAME

TIFFReadRawTile - return an undecoded tile of data from an open TIFF file

SYNOPSIS

#include <tiffio.h>
int TIFFReadRawTile(TIFF* tif, u_int tile, u_char* buf, u_int size)

DESCRIPTION

Read the contents of the specified tile into the (user supplied) data buffer. The actual number of bytes of data that were placed in buf is returned; TIFFReadEncodedTile() returns -1 if an error was encountered. 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().

DIAGNOSTICS

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