<?php
/* $Id: starter_tagged.php,v 1.6 2012/05/03 14:00:41 stm Exp $
 *
 * Tagged PDF starter:
 * Create document with structure information for reflow and accessibility
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 7.0.3
 * The basic code also works with PDFlib/PDFlib+PDI/PPS 7.0.0-7.0.2, but these
 * versions require the "lang" option in begin_document() or end_document().
 * Required data: none
 */
/* This is where the data files are. Adjust as necessary. */
$searchpath = dirname(dirname(dirname(__FILE__)))."/input";
$outfilename = "";

/* Required minimum PDFlib version */
$requiredversion = 703;
$requiredvstr = "7.0.3";

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");

    /* Check whether the required minimum PDFlib version is available */
    $major = $p->get_value("major", 0); 
    $minor = $p->get_value("minor", 0);
    $revision = $p->get_value("revision", 0);
	   
    if ($major*100 + $minor*10 + $revision < $requiredversion) 
	throw new Exception("Error: PDFlib " . $requiredvstr . 
	    " or above is required");
    
    if ($p->begin_document($outfilename, "tagged=true lang=en") == 0) {
	throw new Exception("Error: " + $p->get_errmsg());
    }

    $p->set_info("Creator", "PDFlib Cookbook");
    $p->set_info("Title", "starter_tagged");

    /* Automatically create spaces between chunks of text */
    $p->set_parameter("autospace", "true");

    /*
     * open the first structure element as a child of the document
     * structure root (=0)
     */
    $id = $p->begin_item("Document",
	    "Title = {Starter sample for Tagged PDF}");

    $p->begin_page_ext(0, 0,
	    "width=a4.width height=a4.height taborder=structure");

    $p->create_bookmark("Section 1", "");

    $font = $p->load_font("Helvetica", "winansi", "");

    if ($font == 0)
	throw new Exception("Error: " . $p->get_errmsg());

    $p->setfont($font, 24.0);

    $id2 = $p->begin_item("H1", "Title = {Introduction}");
    $p->show_xy("1 Introduction", 50, 700);
    $p->end_item($id2);

    $id2 = $p->begin_item("P", "Title = {Simple paragraph}");
    $p->setfont($font, 12.0);
    $p->continue_text("This PDF has a very simple document structure ");
    $p->continue_text("which demonstrates basic Tagged PDF features ");
    $p->continue_text("for accessibility.");

    $p->end_item($id2);

    /*
     * The page number is created as an artifact; it will be ignored
     * when reflowing the page in Acrobat.
     */
    $id_artifact = $p->begin_item("Artifact", "");
    $p->show_xy("Page 1", 250, 100);
    $p->end_item($id_artifact);

    $p->end_page_ext("");

    $p->end_item($id);
    $p->end_document("");

    $buf = $p->get_buffer();
    $len = strlen($buf);

    header("Content-type: application/pdf");
    header("Content-Length: $len");
    header("Content-Disposition: inline; filename=starter_tagged.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);
}
$p = 0;
?>