TIFFRewriteDirectory

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 ALSO
       libtiff(3T),  TIFFOpen(3T), TIFFError(3T), TIFFReadDirectory(3T), TIFF-
       SetDirectory(3T)



                              September 26, 2001        TIFFWriteDirectory(3T)