fonts/escape_sequences

<?php

/* $Id: escape_sequences.php,v 1.3 2009/07/20 11:20:02 rp Exp $

 * Escape sequences:

 * Use escape sequences in text lines to output octal or hexadecimal values

 *

 * Enable the resolution of escape sequences by setting the "escapesequence"

 * parameter to "true".

 * Output simple text in octal as well as hexadecimal notation using

 * fit_textline().

 *

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

 * Required data: none

 */

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

$searchpath = "../input";

$outfile = "";

$title = "Escape Sequences";

$font;

$x=100;

$xoff=200;

$y=650;

$yoff=35;

 

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", "bytes");

    if ($p->begin_document($outfile, "") == 0)

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

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

    $p->set_info("Title", $title);

   

    /* For PDFlib Lite: change "unicode" to "winansi" */

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

    if ($font == 0)

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

            

    /* Enable escape sequences to be resolved */

    $p->set_parameter("escapesequence", "true");

   

    /* Start page */

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

   

    /* Set the font and font size */

    $p->setfont($font, 18);

   

    /* Output some descriptive text, i.e. the header for a kind of

     * input/output table

     */

    $p->fit_textline("Input", $x, $y, "underline underlinewidth=1");

    $p->fit_textline("Output", $x+$xoff, $y, "underline underlinewidth=1");

   

     

    /* ---------------------------------------------------------

     * Output some text in octal notation using escape sequences

     * ---------------------------------------------------------

     */

 

    /* Show the input text.

     * In PDFlib with PHP, four backslashes are needed to output just one

     * of them. First, the PHP interpreter resolves each pair of backslashes

     * to one backslash. Then, these two backslashes are resolved by PDFlib

     * to one backslash, e.g. "\\\\160" will result in the literal string

     * "\160" in the output.

     */

    $p->fit_textline("\\\\160", $x, $y-=$yoff, "");

   

    /* Output the character "p" by supplying it in octal notation

     * using the escape sequence "\\160". Two backslashes are needed since

     * the PHP interpreter will resolve "\\" to "\". Then, PDFlib will

     * interpret the "\" escape sequence as hexadecimal notation provided

     * that the "escapesequence" parameter has been set to "true" as done

     * above. 

     */

    $p->fit_textline("\\160", $x+$xoff, $y, "");

   

   

    /* ---------------------------------------------------------------

     * Output some German umlauts in hexadecimal notation using escape

     * sequences

     * ---------------------------------------------------------------

     */

            

    /* Show the input text (for a description see above) */

    $p->fit_textline("\\\\xC4", $x, $y-=$yoff, "");

   

    /* Output the character "Ä" by supplying it in hexadecimal notation

     * using the escape sequence "\\xC4" (for a description see above). 

     */

    $p->fit_textline("\\xC4", $x+$xoff, $y, "");

   

   

    /* Show the input text (for a description see above) */

    $p->fit_textline("\\\\xD6", $x, $y-=$yoff, "");

   

    /* Output the character "Ö" by supplying it in hexadecimal notation

     * using the escape sequence "\\xD6" (for a description see above). 

     */

    $p->fit_textline("\\xD6", $x+$xoff, $y, "");

   

   

    /* Show the input text (for a description see above) */

    $p->fit_textline("\\\\xDC", $x, $y-=$yoff, "");

   

    /* Output the character "Ü" by supplying it in hexadecimal notation

     * using the escape sequence "\\xDC" (for a description see above). 

     */

    $p->fit_textline("\\xDC", $x+$xoff, $y, "");

   

    /* Finish page */

    $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=escape_sequences.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;

?>