213 lines
6.2 KiB
HTML
213 lines
6.2 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
|
|
<HTML><HEAD><TITLE>Manpage of TIFFReadDirectory</TITLE>
|
|
</HEAD><BODY BGCOLOR=WHITE><FONT FACE="helvetica, sans, arial">
|
|
<H1>TIFFReadDirectory</H1>
|
|
Section: Misc. Reference Manual Pages (3T)<BR>Updated: October 15, 1995<BR><A HREF="#index">Index</A>
|
|
<BR><A HREF="index.html">Return to Main Contents</A>
|
|
<HR>
|
|
|
|
<A NAME="lbAB"> </A>
|
|
<H2>NAME</H2>
|
|
|
|
TIFFReadDirectory - get the contents of the next directory in an open
|
|
<FONT SIZE="-1">TIFF</FONT>
|
|
file
|
|
<A NAME="lbAC"> </A>
|
|
<H2>SYNOPSIS</H2>
|
|
|
|
<B>#include <<A HREF="file:/usr/include/tiffio.h">tiffio.h</A>></B>
|
|
|
|
<BR>
|
|
|
|
<B>int TIFFReadDirectory(TIFF* tif)</B>
|
|
|
|
<A NAME="lbAD"> </A>
|
|
<H2>DESCRIPTION</H2>
|
|
|
|
Read the next directory in the specified file and make it the
|
|
current directory.
|
|
Applications only need to call
|
|
<I>TIFFReadDirectory</I>
|
|
|
|
to read multiple subfiles in a single
|
|
<FONT SIZE="-1">TIFF</FONT>
|
|
file-
|
|
the first directory in a file is automatically read when
|
|
<I>TIFFOpen</I>
|
|
|
|
is called.
|
|
<A NAME="lbAE"> </A>
|
|
<H2>NOTES</H2>
|
|
|
|
If the library is compiled with
|
|
<FONT SIZE="-1">STRIPCHOP_SUPPORT</FONT>
|
|
enabled, then images that have a single uncompressed strip or
|
|
tile of data are automatically treated as if they were made
|
|
up of multiple strips or tiles of approximately 8 kilobytes each.
|
|
This operation is done only in-memory; it does not alter the
|
|
contents of the file.
|
|
However, the construction of the ``chopped strips'' is visible
|
|
to the application through the number of strips [tiles]
|
|
returned by
|
|
<I>TIFFNumberOfStrips</I>
|
|
|
|
[<I>TIFFNumberOfTiles</I>].
|
|
|
|
<A NAME="lbAF"> </A>
|
|
<H2>RETURN VALUES</H2>
|
|
|
|
If the next directory was successfully read, 1 is returned.
|
|
Otherwise, 0 is returned if an error was encountered,
|
|
or if there are no more directories to be read.
|
|
<A NAME="lbAG"> </A>
|
|
<H2>DIAGNOSTICS</H2>
|
|
|
|
All error messages are directed to the
|
|
<I><A HREF="TIFFError.3t.html">TIFFError</A></I>(3T)
|
|
|
|
routine.
|
|
All warning messages are directed to the
|
|
<I><A HREF="TIFFWarning.3t.html">TIFFWarning</A></I>(3T)
|
|
|
|
routine.
|
|
<P>
|
|
|
|
<B>Seek error accessing TIFF directory</B>.
|
|
An error occurred while positioning to the location of the
|
|
directory.
|
|
<P>
|
|
|
|
<B>Wrong data type %d for field "%s"</B>.
|
|
The tag entry in the directory had an incorrect data type.
|
|
For example, an
|
|
<I>ImageDescription</I>
|
|
|
|
tag with a
|
|
<FONT SIZE="-1">SHORT</FONT>
|
|
data type.
|
|
<P>
|
|
|
|
<B>TIFF directory is missing required "%s" field</B>.
|
|
The specified tag is required to be present by the
|
|
<FONT SIZE="-1">TIFF</FONT>
|
|
5.0 specification, but is missing.
|
|
The directory is (usually) unusable.
|
|
<P>
|
|
|
|
<B>%s: Rational with zero denominator</B>.
|
|
A directory tag has a
|
|
<FONT SIZE="-1">RATIONAL</FONT>
|
|
value whose denominator is zero.
|
|
<P>
|
|
|
|
<B>Incorrect count %d for field "%s" (%lu, expecting %lu); tag ignored</B>.
|
|
The specified tag's count field is bad.
|
|
For example, a count other than 1 for a
|
|
<I>SubFileType</I>
|
|
|
|
tag.
|
|
<P>
|
|
|
|
<B>Cannot handle different per-sample values for field "%s"</B>.
|
|
The tag has
|
|
<I>SamplesPerPixel</I>
|
|
|
|
values and they are not all the same; e.g.
|
|
<I>BitsPerSample</I>.
|
|
|
|
The library is unable to handle images of this sort.
|
|
<P>
|
|
|
|
<B>Count mismatch for field "%s"; expecting %d, got %d</B>.
|
|
The count field in a
|
|
tag does not agree with the number expected by the library.
|
|
This should never happen, so if it does, the library refuses to
|
|
read the directory.
|
|
<P>
|
|
|
|
<B>Invalid TIFF directory; tags are not sorted in ascending order</B>.
|
|
The directory tags are not properly sorted as specified
|
|
in the
|
|
<FONT SIZE="-1">TIFF</FONT>
|
|
5.0 specification.
|
|
This error is not fatal.
|
|
<P>
|
|
|
|
<B>Ignoring unknown field with tag %d (0x%x)</B>.
|
|
An unknown tag was encountered in the directory;
|
|
the library ignores all such tags.
|
|
<P>
|
|
|
|
<B>TIFF directory is missing requred "ImageLength" field</B>.
|
|
The image violates the specification by not having a necessary field.
|
|
There is no way for the library to recover from this error.
|
|
<P>
|
|
|
|
<B>TIFF directory is missing requred "PlanarConfig" field</B>.
|
|
The image violates the specification by not having a necessary field.
|
|
There is no way for the library to recover from this error.
|
|
<P>
|
|
|
|
<B>TIFF directory is missing requred "StripOffsets" field</B>.
|
|
The image has multiple strips, but is missing the tag that
|
|
specifies the file offset to each strip of data.
|
|
There is no way for the library to recover from this error.
|
|
<P>
|
|
|
|
<B>TIFF directory is missing requred "TileOffsets" field</B>.
|
|
The image has multiple tiles, but is missing the tag that
|
|
specifies the file offset to each tile of data.
|
|
There is no way for the library to recover from this error.
|
|
<P>
|
|
|
|
<B>TIFF directory is missing required "StripByteCounts" field</B>.
|
|
The image has multiple strips, but is missing the tag that
|
|
specifies the size of each strip of data.
|
|
There is no way for the library to recover from this error.
|
|
<P>
|
|
|
|
<B>TIFF directory is missing required "StripByteCounts" field, calculating from imagelength</B>.
|
|
The image violates the specification by not having a necessary field.
|
|
However, when the image is comprised of only one strip or tile, the
|
|
library will estimate the missing value based on the file size.
|
|
<P>
|
|
|
|
<B>Bogus "StripByteCounts" field, ignoring and calculating from imagelength</B>.
|
|
Certain vendors violate the specification by writing zero for
|
|
the StripByteCounts tag when they want to leave the value
|
|
unspecified.
|
|
If the image has a single strip, the library will estimate
|
|
the missing value based on the file size.
|
|
<A NAME="lbAH"> </A>
|
|
<H2>SEE ALSO</H2>
|
|
|
|
<I><A HREF="libtiff.3t.html">libtiff</A></I>(3T),
|
|
|
|
<I><A HREF="TIFFOpen.3t.html">TIFFOpen</A></I>(3T),
|
|
|
|
<I><A HREF="TIFFWriteDirectory.3t.html">TIFFWriteDirectory</A></I>(3T),
|
|
|
|
<I><A HREF="TIFFSetDirectory.3t.html">TIFFSetDirectory</A></I>(3T),
|
|
|
|
<I><A HREF="TIFFSetSubDirectory.3t.html">TIFFSetSubDirectory</A></I>(3T)
|
|
|
|
|
|
<HR>
|
|
<A NAME="index"> </A><H2>Index</H2>
|
|
<DL>
|
|
<DT><A HREF="#lbAB">NAME</A><DD>
|
|
<DT><A HREF="#lbAC">SYNOPSIS</A><DD>
|
|
<DT><A HREF="#lbAD">DESCRIPTION</A><DD>
|
|
<DT><A HREF="#lbAE">NOTES</A><DD>
|
|
<DT><A HREF="#lbAF">RETURN VALUES</A><DD>
|
|
<DT><A HREF="#lbAG">DIAGNOSTICS</A><DD>
|
|
<DT><A HREF="#lbAH">SEE ALSO</A><DD>
|
|
</DL>
|
|
<HR>
|
|
This document was created by
|
|
<A HREF="index.html">man2html</A>,
|
|
using the manual pages.<BR>
|
|
Time: 01:31:38 GMT, November 23, 1999
|
|
</BODY>
|
|
</HTML>
|