interchange/embed_xmp

<?php

/* $Id: embed_xmp.php,v 1.3 2009/07/13 11:59:17 rp Exp $

 * Embed XMP:

 * Embed custom XMP metadata in a document

 *

 * Use the "metadata" option of begin_document() to read XMP metadata from an

 * XMP file and embed it in the output document.

 *

 * Required software: PDFlib/PDFlib+PDI/PPS 7

 * Required data: XMP file

 */

/* This is where the data files are. Adjust as necessary. */

$searchpath = "../input";

$outfile = "";

$title = "Embed XMP";

$xmpfile = "simple.xmp";

try {

    $p = new PDFlib();

    $p->set_parameter("SearchPath", $searchpath);

    /* This means we must check return values of load_font() etc. */

    $p->set_parameter("errorpolicy", "return");

    $p->set_parameter("textformat", "utf8");

   

    /* Start the document with an XMP file supplied, containing a few

     * commonly used XMP properties. The XMP metadata will be read from the

     * file and embedded in the document. PDFlib will merge several

     * internally generated entries into the user-supplied XMP, e.g.

     * xmp:CreateDate.

     */

    if ($p->begin_document($outfile,

        "metadata={filename=" . $xmpfile . "}") == 0)

        throw new Exception("Error: " . $p->get_errmsg());

   

    $p->set_info("Creator", "PDFlib Cookbook");

    $p->set_info("Title", $title);

   

    $font = $p->load_font("Helvetica", "unicode", "");

    if ($font == 0)

        throw new Exception("Error: " . $p->get_errmsg());

    /* Start page */

    $p->begin_page_ext(0, 0, "width=a4.width height=a4.height");

   

    $p->setfont($font, 12);

   

    $p->fit_textline("XMP metadata is read from an XMP file and embedded " .

        "in the document.", 20, 600, "");

   

    $p->end_page_ext("");

    $p->end_document("");

    $buf = $p->get_buffer();

    $len = strlen($buf);

    header("Content-type: application/pdf");

    header("Content-Length: $len");

    header("Content-Disposition: inline; filename=embed_xmp.pdf");

    print $buf;

}

catch (PDFlibException $e) {

    die("PDFlib exception occurred:\n" .

        "[" . $e->get_errnum() . "] " . $e->get_apiname() . ": " .

        $e->get_errmsg() . "\n");

}

catch (Exception $e) {

    die($e->getMessage());

}

$p = 0;

?>