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-<html>
- <head>
- <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252">
- <link rel=StyleSheet href="style.css" type="text/css">
- <META NAME="keywords" CONTENT="JPEG Metadata Application Segments APP0 APP1 APP2 APP3 APP12 APP13 APP14 EXIF DCF XMP RDF Photoshop IRB IPTC DCMI JFIF">
-
- <title>The PHP JPEG Metadata Toolkit - Documentation</title>
- </head>
-
- <body>
- <div class="headerbar">
- <H1 align="center" style="padding:15">The PHP JPEG Metadata Toolkit - Documentation</H1>
- </div>
-
- <a href="index.html">Go to Documentation - Home</a>
-
- <div class="maintext">
-
- <h2>JFIF &amp; JFIF Extension Function Reference</h2>
- <p>
- The &quot;App 0&quot; segment is often used by the JPEG File Interchange Format (JFIF) information.
- Sometimes, there is an additional &quot;App 0&quot; segment for the JFIF Extension (JFXX) information.
- </p>
-
- <br>
- <br>
-
- <table border cellpadding=8 cellspacing=0>
- <tr>
- <td>Function:</td>
- <td colspan=2><b>get_JFIF</b></td>
- </tr>
- <tr>
- <td>Description:</td>
- <td colspan=2>
- Retrieves information from a JPEG File Interchange Format (JFIF)
- segment and returns it in an array. Uses information supplied by
- the get_jpeg_header_data function
- </td>
- <tr>
- <tr>
- <td>Parameters:</td>
- <td width=1%>jpeg_header_data</td>
- <td>a JPEG header data array in the same format as from get_jpeg_header_data</td>
- </tr>
- <tr>
- <td rowspan=2>Returns:</td>
- <td>JFIF_data</td>
- <td>an array of JFIF data</td>
- </tr>
- <tr>
- <td>FALSE</td>
- <td>if a JFIF segment could not be found</td>
- </tr>
- </table>
-
-
- <br>
- <br>
- <br>
- <br>
-
- <table border cellpadding=8 cellspacing=0>
- <tr>
- <td>Function:</td>
- <td colspan=2><b>put_JFIF</b></td>
- </tr>
- <tr>
- <td>Description:</td>
- <td colspan=2>
- Creates a new JFIF segment from an array of JFIF data in the
- same format as would be retrieved from get_JFIF, and inserts
- this segment into the supplied JPEG header array
- </td>
- <tr>
- <tr>
- <td rowspan=2>Parameters:</td>
- <td width=1%>jpeg_header_data</td>
- <td>a JPEG header data array in the same format as from get_jpeg_header_data, into which the new JFIF segment will be put</td>
- </tr>
- <tr>
- <td width=1%>new_JFIF_array</td>
- <td>a JFIF information array in the same format as from get_JFIF, to create the new segment</td>
- </tr>
- <tr>
- <td rowspan=1>Returns:</td>
- <td>jpeg_header_data</td>
- <td>the JPEG header data array with the new JFIF segment added</td>
- </tr>
- </table>
-
-
- <br>
- <br>
- <br>
- <br>
-
-
- <table border cellpadding=8 cellspacing=0>
- <tr>
- <td>Function:</td>
- <td colspan=2><b>Interpret_JFIF_to_HTML</b></td>
- </tr>
- <tr>
- <td>Description:</td>
- <td colspan=2>
- Generates html showing the JFIF information contained in a JFIF data array, as retrieved with get_JFIF
- </td>
- <tr>
- <tr>
- <td rowspan=2>Parameters:</td>
- <td width=1%>JFIF_array</td>
- <td>a JFIF data array, as from get_JFIF</td>
- </tr>
- <tr>
- <td width=1%>filename</td>
- <td>the name of the JPEG file being processed (used by the script which displays the JFIF thumbnail)</td>
- </tr>
- <tr>
- <td rowspan=1>Returns:</td>
- <td>output</td>
- <td>the HTML string</td>
- </tr>
- </table>
-
-
- <br>
- <br>
- <br>
- <br>
-
- <table border cellpadding=8 cellspacing=0>
- <tr>
- <td>Function:</td>
- <td colspan=2><b>get_JFXX</b></td>
- </tr>
- <tr>
- <td>Description:</td>
- <td colspan=2>
- Retrieves information from a JPEG File Interchange Format Extension (JFXX)
- segment and returns it in an array. Uses information supplied by
- the get_jpeg_header_data function
- </td>
- <tr>
- <tr>
- <td rowspan=1>Parameters:</td>
- <td width=1%>jpeg_header_data</td>
- <td>a JPEG header data array in the same format as from get_jpeg_header_data</td>
- </tr>
- <tr>
- <td rowspan=2>Returns:</td>
- <td>JFXX_data</td>
- <td>an array of JFXX data</td>
- </tr>
- <tr>
- <td width=1%>FALSE</td>
- <td>if a JFXX segment could not be found</td>
- </tr>
- </table>
-
-
- <br>
- <br>
- <br>
- <br>
-
- <table border cellpadding=8 cellspacing=0>
- <tr>
- <td>Function:</td>
- <td colspan=2><b>put_JFXX</b></td>
- </tr>
- <tr>
- <td>Description:</td>
- <td colspan=2>
- Creates a new JFXX segment from an array of JFXX data in the
- same format as would be retrieved from get_JFXX, and inserts
- this segment into the supplied JPEG header array
- </td>
- <tr>
- <tr>
- <td rowspan=2>Parameters:</td>
- <td width=1%>jpeg_header_data</td>
- <td>a JPEG header data array in the same format as from get_jpeg_header_data, into which the new JFXX segment will be put</td>
- </tr>
- <tr>
- <td width=1%>new_JFXX_array</td>
- <td>a JFXX information array in the same format as from get_JFXX, to create the new segment</td>
- </tr>
- <tr>
- <td rowspan=1>Returns:</td>
- <td>jpeg_header_data</td>
- <td>the JPEG header data array with the new JFXX segment added</td>
- </tr>
- </table>
-
-
- <br>
- <br>
- <br>
- <br>
-
-
- <table border cellpadding=8 cellspacing=0>
- <tr>
- <td>Function:</td>
- <td colspan=2><b>Interpret_JFXX_to_HTML</b></td>
- </tr>
- <tr>
- <td>Description:</td>
- <td colspan=2>
- Generates html showing the JFXX thumbnail contained in a JFXX data array, as retrieved with get_JFXX
- </td>
- <tr>
- <tr>
- <td rowspan=2>Parameters:</td>
- <td width=1%>JFXX_array</td>
- <td>a JFXX information array in the same format as from get_JFXX, to create the new segment</td>
- </tr>
- <tr>
- <td width=1%>filename</td>
- <td>the name of the JPEG file being processed (used by the script which displays the JFXX thumbnail)</td>
- </tr>
- <tr>
- <td rowspan=1>Returns:</td>
- <td>output</td>
- <td>the Html string</td>
- </tr>
- </table>
-
-
- <br>
- <br>
-
- </div>
-
- </body>
-</html> \ No newline at end of file