text_output/transparent_text

<?php

/* $Id: transparent_text.php,v 1.5 2013/02/22 22:38:08 rp Exp $

 * Transparent text:

 * Create some transparent text

 *

 * Display a background image and show transparent text in the foreground.

 * Create transparency by applying an extended graphics state with the

 * "opacityfill" option set to a value less than 1.

 *

 * Required software: PDFlib/PDFlib+PDI/PPS 9

 * Required data: image file

 */

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

$searchpath = dirname(dirname(dirname(__FILE__)))."/input";

$outfile = "";

$title = "Transparent Text";

$imagefile = "nesrin.jpg";

try {

    $p = new pdflib();

    $p->set_option("searchpath={" . $searchpath . "}");

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

    $p->set_option("errorpolicy=return");

    $p->set_option("stringformat=utf8");

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

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

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

    $p->set_info("Title", $title );

   

    /* Load image */

    $image = $p->load_image("auto", $imagefile, "");

    if ($image == 0)

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

    /* Load the font. */

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

    if ($font == 0)

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

    /* Start page */

    $p->begin_page_ext(842, 595, "");

   

   

    /* Draw a yellow background rectangle */

    $p->setcolor("fill", "rgb", 1, 0.9, 0.58, 0);

    $p->rect(0, 0, 842, 595);

    $p->fill();

   

    /* Output a background image */

    $p->fit_image($image, 50, 50, "");

   

    /* Save the current graphics state. The save/restore of the current

     * state is not necessarily required, but it will help you get back to

     * a graphics state without any transparency.

     */

    $p->save();

   

    /* Create an extended graphics state with transparency set to 50%, using

     * create_gstate() with the "opacityfill" option set to 0.5.

     */

    $gstate = $p->create_gstate("opacityfill=.5");

   

    /* Apply the extended graphics state */

    $p->set_gstate($gstate);

   

    /* Display some red text which will be transparent according to the

     * graphics state set

     */

    $p->setcolor("fill", "rgb", 1, 0.9, 0.58, 0);

    $p->fit_textline("My favorite holiday photo", 100, 100, "font=" . $font .

        " fontsize=50");

   

    /* Restore the current graphics state */

    $p->restore();

   

    $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=transparent_part_of_text.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;

?>