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TIFFReadEncodedTile.3tiff.html
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<!-- Creator : groff version 1.22.4 --> <!-- CreationDate: Sun Nov 2 19:00:00 2025 --> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta name="generator" content="groff -Thtml, see www.gnu.org"> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta name="Content-Style" content="text/css"> <style type="text/css"> p { margin-top: 0; margin-bottom: 0; vertical-align: top } pre { margin-top: 0; margin-bottom: 0; vertical-align: top } table { margin-top: 0; margin-bottom: 0; vertical-align: top } h1 { text-align: center } </style> <title>TIFFReadEncodedTile</title> </head> <body> <h1 align="center">TIFFReadEncodedTile</h1> <a href="#NAME">NAME</a><br> <a href="#SYNOPSIS">SYNOPSIS</a><br> <a href="#DESCRIPTION">DESCRIPTION</a><br> <a href="#NOTES">NOTES</a><br> <a href="#RETURN VALUES">RETURN VALUES</a><br> <a href="#DIAGNOSTICS">DIAGNOSTICS</a><br> <a href="#SEE ALSO">SEE ALSO</a><br> <hr> <h2>NAME <a name="NAME"></a> </h2> <p style="margin-left:11%; margin-top: 1em">TIFFReadEncodedTile − read and decode a tile of data from an open <small>TIFF</small> file</p> <h2>SYNOPSIS <a name="SYNOPSIS"></a> </h2> <p style="margin-left:11%; margin-top: 1em"><b>#include <tiffio.h></b></p> <p style="margin-left:11%; margin-top: 1em"><b>int TIFFReadEncodedTile(TIFF *</b><i>tif</i><b>, ttile_t</b> <i>tile</i><b>, tdata_t</b> <i>buf</i><b>, tsize_t</b> <i>size</i><b>)</b></p> <h2>DESCRIPTION <a name="DESCRIPTION"></a> </h2> <p style="margin-left:11%; margin-top: 1em">Read the specified tile of data and place up to <i>size</i> bytes of decompressed information in the (user supplied) data buffer.</p> <h2>NOTES <a name="NOTES"></a> </h2> <p style="margin-left:11%; margin-top: 1em">The value of <i>tile</i> is a ‘‘raw tile number.’’ That is, the caller must take into account whether or not the data are organized in separate planes (<i>PlanarConfiguration</i>=2). <i>TIFFComputeTile</i> automatically does this when converting an (x,y,z,sample) coordinate quadruple to a tile number. To read a full tile of data the data buffer should be at least as large as the value returned by <i>TIFFTileSize</i>.</p> <p style="margin-left:11%; margin-top: 1em">The library attempts to hide bit- and byte-ordering differences between the image and the native machine by converting data to the native machine order. Bit reversal is done if the <i>FillOrder</i> tag is opposite to the native machine bit order. 16- and 32-bit samples are automatically byte-swapped if the file was written with a byte order opposite to the native machine byte order,</p> <h2>RETURN VALUES <a name="RETURN VALUES"></a> </h2> <p style="margin-left:11%; margin-top: 1em">The actual number of bytes of data that were placed in <i>buf</i> is returned; <i>TIFFReadEncodedTile</i> returns −1 if an error was encountered.</p> <h2>DIAGNOSTICS <a name="DIAGNOSTICS"></a> </h2> <p style="margin-left:11%; margin-top: 1em">All error messages are directed to the <b>TIFFError</b>(3TIFF) routine.</p> <h2>SEE ALSO <a name="SEE ALSO"></a> </h2> <p style="margin-left:11%; margin-top: 1em"><b>TIFFOpen</b>(3TIFF), <b>TIFFReadRawTile</b>(3TIFF), <b>TIFFReadTile</b>(3TIFF), <b>libtiff</b>(3TIFF)</p> <p style="margin-left:11%; margin-top: 1em">Libtiff library home page: <b>http://www.simplesystems.org/libtiff/</b></p> <hr> </body> </html>