The following routines return status information about an open
TIFFCurrentDirectory returns the index of the current directory (directories are numbered starting
at 0). This number is suitable for use with the
TIFFLastDirectory returns a non-zero value if the current directory is the last directory in the
file; otherwise zero is returned.
TIFFCurrentTile, return the current row, strip, and tile, respectively, that is being read or
written. These values are updated each time a read or write is done.
TIFFFileno returns the underlying file descriptor used to access the
TIFF image in the filesystem.
TIFFFileName returns the pathname argument passed to
TIFFGetMode returns the mode with which the underlying file was opened. On
UNIX systems, this is the value passed to the
TIFFIsTiled returns a non-zero value if the image data has a tiled organization. Zero is
returned if the image data is organized in strips.
TIFFIsByteSwapped returns a non-zero value if the image data was in a different byte-order than
the host machine. Zero is returned if the TIFF file and local host byte-orders
are the same. Note that TIFFReadTile(), TIFFReadStrip() and
TIFFReadScanline() functions already normally perform byte swapping to local
host order if needed.
TIFFIsUpSampled returns a non-zero value if image data returned through the read interface
routines is being up-sampled. This can be useful to applications that want to
calculate I/O buffer sizes to reflect this usage (though the usual strip and
tile size routines already do this).
TIFFIsMSB2LSB returns a non-zero value if the image data is being returned with bit 0 as the
most significant bit.
TIFFGetVersion returns an
ASCII string that has a version stamp for the
TIFF library software.