Edit File: TIFFReadTile.3tiff.html
<!-- Creator : groff version 1.18.1 --> <!-- CreationDate: Fri Jul 13 17:43:16 2007 --> <html> <head> <meta name="generator" content="groff -Thtml, see www.gnu.org"> <meta name="Content-Style" content="text/css"> <title>TIFFReadTile</title> </head> <body> <h1 align=center>TIFFReadTile</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> <a name="NAME"></a> <h2>NAME</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p>TIFFReadTile − read and decode a tile of data from an open <small>TIFF</small> file</p> </td> </table> <a name="SYNOPSIS"></a> <h2>SYNOPSIS</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p><b>#include <tiffio.h></b></p> <!-- INDENTATION --> <p><b>tsize_t TIFFReadTile(TIFF *</b><i>tif</i><b>, tdata_t</b> <i>buf</i><b>, uint32</b> <i>x</i><b>, uint32</b> <i>y</i><b>, uint32</b> <i>z</i><b>, tsample_t</b> <i>sample</i><b>)</b></p> </td> </table> <a name="DESCRIPTION"></a> <h2>DESCRIPTION</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p>Return the data for the tile <i>containing</i> the specified coordinates. The data placed in <i>buf</i> are returned decompressed and, typically, in the native byte- and bit-ordering, but are otherwise packed (see further below). The buffer must be large enough to hold an entire tile of data. Applications should call the routine <i>TIFFTileSize</i> to find out the size (in bytes) of a tile buffer. The <i>x</i> and <i>y</i> parameters are always used by <i>TIFFReadTile</i>. The <i>z</i> parameter is used if the image is deeper than 1 slice (<i>ImageDepth</i>>1). The <i>sample</i> parameter is used only if data are organized in separate planes (<i>PlanarConfiguration</i>=2).</p> </td> </table> <a name="NOTES"></a> <h2>NOTES</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p>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> </td> </table> <a name="RETURN VALUES"></a> <h2>RETURN VALUES</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p><i>TIFFReadTile</i> returns −1 if it detects an error; otherwise the number of bytes in the decoded tile is returned.</p> </td> </table> <a name="DIAGNOSTICS"></a> <h2>DIAGNOSTICS</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p>All error messages are directed to the <b>TIFFError</b>(3TIFF) routine.</p> </td> </table> <a name="SEE ALSO"></a> <h2>SEE ALSO</h2> <!-- INDENTATION --> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="8%"></td> <td width="91%"> <p><b>TIFFCheckTile</b>(3TIFF), <b>TIFFComputeTile</b>(3TIFF), <b>TIFFOpen</b>(3TIFF), <b>TIFFReadEncodedTile</b>(3TIFF), <b>TIFFReadRawTile</b>(3TIFF), <b>libtiff</b>(3TIFF)</p> <!-- INDENTATION --> <p>Libtiff library home page: <b>http://www.remotesensing.org/libtiff/</b></p> </td> </table> <hr> </body> </html>
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