TIFFWriteDirectory(3T)TIFFWriteDirectory(3T)NAME
TIFFWriteDirectory, TIFFRewriteDirectory - write the current directory
in an open TIFF file
SYNOPSIS
#include <tiffio.h>
int TIFFWriteDirectory(TIFF* tif)
int TIFFRewriteDirectory(TIFF* tif)
DESCRIPTION
TIFFWriteDirectory will write the contents of the current directory to
the file and setup to create a new subfile in the same file. Applica‐
tions only need to call TIFFWriteDirectory when writing multiple sub‐
files to a single TIFF file. TIFFWriteDirectory is automatically
called by TIFFClose and TIFFFlush to write a modified directory if the
file is open for writing.
The TIFFRewriteDirectory function operates similarly to TIFFWriteDirec‐
tory but can be called with directories previously read or written that
already have an established location in the file. It will rewrite the
directory, but instead of place it at it's old location (as TIFFWrite‐
Directory would) it will place them at the end of the file, correcting
the pointer from the preceeding directory or file header to point to
it's new location. This is particularly important in cases where the
size of the directory and pointed to data has grown, so it won't fit in
the space available at the old location.
RETURN VALUES
1 is returned when the contents are successfully written to the file.
Otherwise, 0 is returned if an error was encountered when writing the
directory contents.
DIAGNOSTICS
All error messages are directed to the TIFFError(3T) routine.
Error post-encoding before directory write. Before writing the con‐
tents of the current directory, any pending data are flushed. This
message indicates that an error occurred while doing this.
Error flushing data before directory write. Before writing the con‐
tents of the current directory, any pending data are flushed. This
message indicates that an error occurred while doing this.
Cannot write directory, out of space. There was not enough space to
allocate a temporary area for the directory that was to be written.
Error writing directory count. A write error occurred when writing the
count of fields in the directory.
Error writing directory contents. A write error occurred when writing
the directory fields.
Error writing directory link. A write error occurred when writing the
link to the next directory.
Error writing data for field "%s". A write error occurred when writing
indirect data for the specified field.
Error writing TIFF header. A write error occurred when re-writing
header at the front of the file.
Error fetching directory count. A read error occurred when fetching
the directory count field for a previous directory. This can occur
when setting up a link to the directory that is being written.
Error fetching directory link. A read error occurred when fetching the
directory link field for a previous directory. This can occur when
setting up a link to the directory that is being written.
SEE ALSOlibtiff(3T), TIFFOpen(3T), TIFFError(3T), TIFFReadDirectory(3T), TIFF‐
SetDirectory(3T)
September 26, 2001 TIFFWriteDirectory(3T)
