| | 1 | <!-- Creator : groff version 1.18.1 --> |
| | 2 | <!-- CreationDate: Mon Mar 13 18:03:10 2006 --> |
| | 3 | <html> |
| | 4 | <head> |
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| | 7 | <title>TIFFReadTile</title> |
| | 8 | </head> |
| | 9 | <body> |
| | 10 | |
| | 11 | <h1 align=center>TIFFReadTile</h1> |
| | 12 | <a href="#NAME">NAME</a><br> |
| | 13 | <a href="#SYNOPSIS">SYNOPSIS</a><br> |
| | 14 | <a href="#DESCRIPTION">DESCRIPTION</a><br> |
| | 15 | <a href="#NOTES">NOTES</a><br> |
| | 16 | <a href="#RETURN VALUES">RETURN VALUES</a><br> |
| | 17 | <a href="#DIAGNOSTICS">DIAGNOSTICS</a><br> |
| | 18 | <a href="#SEE ALSO">SEE ALSO</a><br> |
| | 19 | |
| | 20 | <hr> |
| | 21 | <a name="NAME"></a> |
| | 22 | <h2>NAME</h2> |
| | 23 | <!-- INDENTATION --> |
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| | 27 | <td width="8%"></td> |
| | 28 | <td width="91%"> |
| | 29 | <p>TIFFReadTile − read and decode a tile of data from |
| | 30 | an open <small>TIFF</small> file</p> |
| | 31 | </td> |
| | 32 | </table> |
| | 33 | <a name="SYNOPSIS"></a> |
| | 34 | <h2>SYNOPSIS</h2> |
| | 35 | <!-- INDENTATION --> |
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| | 41 | <p><b>#include <tiffio.h></b></p> |
| | 42 | <!-- INDENTATION --> |
| | 43 | <p><b>tsize_t TIFFReadTile(TIFF *</b><i>tif</i><b>, |
| | 44 | tdata_t</b> <i>buf</i><b>, uint32</b> <i>x</i><b>, |
| | 45 | uint32</b> <i>y</i><b>, uint32</b> <i>z</i><b>, |
| | 46 | tsample_t</b> <i>sample</i><b>)</b></p> |
| | 47 | </td> |
| | 48 | </table> |
| | 49 | <a name="DESCRIPTION"></a> |
| | 50 | <h2>DESCRIPTION</h2> |
| | 51 | <!-- INDENTATION --> |
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| | 57 | <p>Return the data for the tile <i>containing</i> the |
| | 58 | specified coordinates. The data placed in <i>buf</i> are |
| | 59 | returned decompressed and, typically, in the native byte- |
| | 60 | and bit-ordering, but are otherwise packed (see further |
| | 61 | below). The buffer must be large enough to hold an entire |
| | 62 | tile of data. Applications should call the routine |
| | 63 | <i>TIFFTileSize</i> to find out the size (in bytes) of a |
| | 64 | tile buffer. The <i>x</i> and <i>y</i> parameters are always |
| | 65 | used by <i>TIFFReadTile</i>. The <i>z</i> parameter is used |
| | 66 | if the image is deeper than 1 slice |
| | 67 | (<i>ImageDepth</i>>1). The <i>sample</i> parameter is |
| | 68 | used only if data are organized in separate planes |
| | 69 | (<i>PlanarConfiguration</i>=2).</p> |
| | 70 | </td> |
| | 71 | </table> |
| | 72 | <a name="NOTES"></a> |
| | 73 | <h2>NOTES</h2> |
| | 74 | <!-- INDENTATION --> |
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| | 79 | <td width="91%"> |
| | 80 | <p>The library attempts to hide bit- and byte-ordering |
| | 81 | differences between the image and the native machine by |
| | 82 | converting data to the native machine order. Bit reversal is |
| | 83 | done if the <i>FillOrder</i> tag is opposite to the native |
| | 84 | machine bit order. 16- and 32-bit samples are automatically |
| | 85 | byte-swapped if the file was written with a byte order |
| | 86 | opposite to the native machine byte order,</p> |
| | 87 | </td> |
| | 88 | </table> |
| | 89 | <a name="RETURN VALUES"></a> |
| | 90 | <h2>RETURN VALUES</h2> |
| | 91 | <!-- INDENTATION --> |
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| | 95 | <td width="8%"></td> |
| | 96 | <td width="91%"> |
| | 97 | <p><i>TIFFReadTile</i> returns −1 if it detects an |
| | 98 | error; otherwise the number of bytes in the decoded tile is |
| | 99 | returned.</p> |
| | 100 | </td> |
| | 101 | </table> |
| | 102 | <a name="DIAGNOSTICS"></a> |
| | 103 | <h2>DIAGNOSTICS</h2> |
| | 104 | <!-- INDENTATION --> |
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| | 109 | <td width="91%"> |
| | 110 | <p>All error messages are directed to the |
| | 111 | <b>TIFFError</b>(3TIFF) routine.</p> |
| | 112 | </td> |
| | 113 | </table> |
| | 114 | <a name="SEE ALSO"></a> |
| | 115 | <h2>SEE ALSO</h2> |
| | 116 | <!-- INDENTATION --> |
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| | 119 | <tr valign="top" align="left"> |
| | 120 | <td width="8%"></td> |
| | 121 | <td width="91%"> |
| | 122 | <p><b>TIFFCheckTile</b>(3TIFF), |
| | 123 | <b>TIFFComputeTile</b>(3TIFF), <b>TIFFOpen</b>(3TIFF), |
| | 124 | <b>TIFFReadEncodedTile</b>(3TIFF), |
| | 125 | <b>TIFFReadRawTile</b>(3TIFF), <b>libtiff</b>(3TIFF)</p> |
| | 126 | <!-- INDENTATION --> |
| | 127 | <p>Libtiff library home page: |
| | 128 | <b>http://www.remotesensing.org/libtiff/</b></p> |
| | 129 | </td> |
| | 130 | </table> |
| | 131 | <hr> |
| | 132 | </body> |
| | 133 | </html> |
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