graphics/overprinting_text
Create text which will overprint other page contents instead of knocking it out.
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<?php
/*
* Overprinting text:
* Create text which will overprint other page contents instead of knocking
* it out
*
* Create an extended graphics state with the options
* "overprintfill=true overprintmode=1".
*
* Required software: PDFlib/PDFlib+PDI/PPS 10
* Required data: none
*/
/* This is where the data files are. Adjust as necessary. */
$searchpath = dirname(__FILE__,3)."/input";
$outfile = "";
$title = "Overprinting Text";
try {
$p = new pdflib();
$p->set_option("searchpath={" . $searchpath . "}");
/* This means we must check return values of load_font() etc. */
$p->set_option("errorpolicy=return");
if ($p->begin_document($outfile, "") == 0)
throw new Exception("Error: " . $p->get_errmsg());
$p->set_info("Creator", "PDFlib Cookbook");
$p->set_info("Title", $title );
/* Start page */
$p->begin_page_ext(400, 300, "");
/* Draw a red background rectangle */
$p->setcolor("fill", "cmyk", 0, 1, 1, 0);
$p->rect(0, 0, 400, 300);
$p->fill();
/* Save the current graphics state */
$p->save();
/* Create an extended graphics state */
$gstate = $p->create_gstate("overprintfill overprintmode=1");
/* Apply the extended graphics state */
$p->set_gstate($gstate);
/* Show some text which will overprint other page contents according to
* the graphics state set
*/
$fontopts = "fontname=NotoSerif-Bold fontsize=36";
$p->setcolor("fill", "cmyk", 0, 0, 0, 1);
$p->fit_textline("overprinting text", 20, 200, $fontopts);
/* Restore the current graphics state */
$p->restore();
/* Show some text. It will not be overprinting since the old graphics
* state has been restored with no overprinting set.
*/
$p->setcolor("fill", "cmyk", 0, 0, 0, 1);
$p->fit_textline("text not overprinting", 20, 100, $fontopts);
$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=overprinting_text.pdf");
print $buf;
} catch (PDFlibException $e){
echo("PDFlib exception occurred:\n" .
"[" . $e->get_errnum() . "] " . $e->get_apiname() .
": " . $e->get_errmsg() . "\n");
exit(1);
} catch (Throwable $e) {
echo("PHP exception occurred: " . $e->getMessage() . "\n");
exit(1);
}
$p = 0;
?>