138 lines
5.2 KiB
Plaintext
138 lines
5.2 KiB
Plaintext
.\"
|
|
.\" Copyright (c) 1988-1997 Sam Leffler
|
|
.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
|
|
.\"
|
|
.\" Permission to use, copy, modify, distribute, and sell this software and
|
|
.\" its documentation for any purpose is hereby granted without fee, provided
|
|
.\" that (i) the above copyright notices and this permission notice appear in
|
|
.\" all copies of the software and related documentation, and (ii) the names of
|
|
.\" Sam Leffler and Silicon Graphics may not be used in any advertising or
|
|
.\" publicity relating to the software without the specific, prior written
|
|
.\" permission of Sam Leffler and Silicon Graphics.
|
|
.\"
|
|
.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
|
|
.\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
|
|
.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
|
|
.\"
|
|
.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
|
|
.\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
|
|
.\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
|
|
.\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
|
|
.\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
|
|
.\" OF THIS SOFTWARE.
|
|
.\"
|
|
.if n .po 0
|
|
.TH TIFFWriteDirectory 3TIFF "September 26, 2001" "libtiff"
|
|
.SH NAME
|
|
TIFFWriteDirectory, TIFFRewriteDirectory, TIFFCheckpointDirectory \- write the
|
|
current directory in an open
|
|
.SM TIFF
|
|
file
|
|
.SH SYNOPSIS
|
|
.B "#include <tiffio.h>"
|
|
.sp
|
|
.BI "int TIFFWriteDirectory(TIFF *" tif ")"
|
|
.br
|
|
.BI "int TIFFRewriteDirectory(TIFF *" tif ")"
|
|
.br
|
|
.BI "int TIFFCheckpointDirectory(TIFF *" tif ")"
|
|
.SH DESCRIPTION
|
|
.IR TIFFWriteDirectory
|
|
will write the contents of the current directory to the file and setup to
|
|
create a new subfile in the same file. Applications only need to call
|
|
.IR TIFFWriteDirectory
|
|
when writing multiple subfiles to a single
|
|
.SM TIFF
|
|
file.
|
|
.IR TIFFWriteDirectory
|
|
is automatically called by
|
|
.IR TIFFClose
|
|
and
|
|
.IR TIFFFlush
|
|
to write a modified directory if the file is open for writing.
|
|
.PP
|
|
The
|
|
.IR TIFFRewriteDirectory
|
|
function operates similarly to
|
|
.IR TIFFWriteDirectory,
|
|
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
|
|
.IR TIFFWriteDirectory
|
|
would) it will place them at the end of the file, correcting the pointer from
|
|
the preceding 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.
|
|
.PP
|
|
The
|
|
.IR TIFFCheckpointDirectory
|
|
writes the current state of the tiff directory into the file to make what
|
|
is currently in the file readable. Unlike
|
|
.IR TIFFWriteDirectory,
|
|
.IR TIFFCheckpointDirectory
|
|
does not free up the directory data structures in memory, so they can be
|
|
updated (as strips/tiles are written) and written again. Reading such
|
|
a partial file you will at worst get a tiff read error for the first
|
|
strip/tile encountered that is incomplete, but you will at least get
|
|
all the valid data in the file before that. When the file is complete,
|
|
just use
|
|
.IR TIFFWriteDirectory
|
|
as usual to finish it off cleanly.
|
|
.SH "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.
|
|
.SH DIAGNOSTICS
|
|
All error messages are directed to the
|
|
.IR TIFFError (3TIFF)
|
|
routine.
|
|
.PP
|
|
.BR "Error post-encoding before directory write" .
|
|
Before writing the contents of the current directory, any pending data are
|
|
flushed. This message indicates that an error occurred while doing this.
|
|
.PP
|
|
.BR "Error flushing data before directory write" .
|
|
Before writing the contents of the current directory, any pending data are
|
|
flushed. This message indicates that an error occurred while doing this.
|
|
.PP
|
|
.BR "Cannot write directory, out of space" .
|
|
There was not enough space to allocate a temporary area for the directory that
|
|
was to be written.
|
|
.PP
|
|
.BR "Error writing directory count" .
|
|
A write error occurred when writing the count of fields in the directory.
|
|
.PP
|
|
.BR "Error writing directory contents" .
|
|
A write error occurred when writing the directory fields.
|
|
.PP
|
|
.BR "Error writing directory link" .
|
|
A write error occurred when writing the link to the next directory.
|
|
.PP
|
|
\fBError writing data for field "%s"\fP.
|
|
A write error occurred when writing indirect data for the specified field.
|
|
.PP
|
|
.BR "Error writing TIFF header" .
|
|
A write error occurred when re-writing header at the front of the file.
|
|
.PP
|
|
.BR "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.
|
|
.PP
|
|
.BR "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.
|
|
.SH "SEE ALSO"
|
|
.BR TIFFOpen (3TIFF),
|
|
.BR TIFFError (3TIFF),
|
|
.BR TIFFReadDirectory (3TIFF),
|
|
.BR TIFFSetDirectory (3TIFF),
|
|
.BR libtiff (3TIFF)
|
|
.PP
|
|
Libtiff library home page:
|
|
.BR http://www.simplesystems.org/libtiff/
|