|
The following routines return status information about an
open TIFF file.
TIFFCurrentDirectory returns the index of the
current directory (directories are numbered starting at 0).
This number is suitable for use with the
TIFFSetDirectory routine.
TIFFLastDirectory returns a non-zero value if the
current directory is the last directory in the file;
otherwise zero is returned.
TIFFCurrentRow, TIFFCurrentStrip, and
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 TIFFOpen or TIFFFdOpen.
TIFFGetMode returns the mode with which the
underlying file was opened. On UNIX systems,
this is the value passed to the open(2) system
call.
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.
|