108 lines
2.8 KiB
HTML
108 lines
2.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML><HEAD><TITLE>Manpage of TIFFReadEncodedTile</TITLE>
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</HEAD><BODY BGCOLOR=WHITE><FONT FACE="helvetica, sans, arial">
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<H1>TIFFReadEncodedTile</H1>
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Section: Misc. Reference Manual Pages (3T)<BR>Updated: October 15, 1995<BR><A HREF="#index">Index</A>
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<BR><A HREF="index.html">Return to Main Contents</A>
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<HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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TIFFReadEncodedTile - read and decode a tile of data from an open
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<FONT SIZE="-1">TIFF</FONT>
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file
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>#include <<A HREF="file:/usr/include/tiffio.h">tiffio.h</A>></B>
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<BR>
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<B>int TIFFReadEncodedTile(TIFF* tif, u_long tile, u_char* buf, u_long size)</B>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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Read the specified tile of data and place up to
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<I>size</I>
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bytes of decompressed information in the (user supplied) data buffer.
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<A NAME="lbAE"> </A>
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<H2>NOTES</H2>
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The value of
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<I>tile</I>
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is a ``raw tile number.''
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That is, the caller must take into account whether or not the
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data are organized in separate planes (<I>PlanarConfiguration</I>=2).
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<I>TIFFComputeTile</I>
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automatically does this when converting an (x,y,z,sample)
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coordinate quadruple to a tile number.
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To read a full tile of data the data buffer should be
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at least as large as the value returned by
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<I>TIFFTileSize</I>.
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<P>
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The library attempts to hide bit- and byte-ordering differences
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between the image and the native machine by converting data
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to the native machine order.
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Bit reversal is done if the
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<I>FillOrder</I>
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tag is opposite to the native machine bit order.
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16- and 32-bit samples are automatically byte-swapped if the
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file was written with a byte order opposite to the native
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machine byte order,
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<A NAME="lbAF"> </A>
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<H2>RETURN VALUES</H2>
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The actual number of bytes of data that were placed in
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<I>buf</I>
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is returned;
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<I>TIFFReadEncodedTile</I>
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returns -1 if an error was encountered.
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<A NAME="lbAG"> </A>
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<H2>DIAGNOSTICS</H2>
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All error messages are directed to the
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<I><A HREF="TIFFError.3t.html">TIFFError</A></I>(3T)
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routine.
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<A NAME="lbAH"> </A>
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<H2>SEE ALSO</H2>
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<I><A HREF="libtiff.3t.html">libtiff</A></I>(3T),
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<I><A HREF="TIFFOpen.3t.html">TIFFOpen</A></I>(3T),
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<I><A HREF="TIFFReadRawTile.3t.html">TIFFReadRawTile</A></I>(3T),
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<I><A HREF="TIFFReadTile.3t.html">TIFFReadTile</A></I>(3T)
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT><A HREF="#lbAB">NAME</A><DD>
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<DT><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT><A HREF="#lbAE">NOTES</A><DD>
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<DT><A HREF="#lbAF">RETURN VALUES</A><DD>
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<DT><A HREF="#lbAG">DIAGNOSTICS</A><DD>
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<DT><A HREF="#lbAH">SEE ALSO</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="index.html">man2html</A>,
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using the manual pages.<BR>
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Time: 01:31:38 GMT, November 23, 1999
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