Perl Requires Chilkat v11.7.0+

Put a Letterhead Behind the First Page of a PDF

See more PDF Watermark Examples

Demonstrates the pdfPage type, which places a page of another PDF as the watermark. It is the way to use a letterhead, a cover overlay or a vector logo that was saved as a PDF, and unlike an image it stays sharp at any size because it is drawn, not resampled. "zOrder" set to back puts it behind the existing content, where a letterhead belongs, and "pages" set to first restricts it to page one. Perl

use chilkat();

$success = 0;

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

#  The PDF used in this example is available at two_page_memo.pdf

#  The PDF used in this example is available at letterhead.pdf

$pdf = chilkat::CkPdf->new();
$success = $pdf->LoadFile("qa_data/pdf/two_page_memo.pdf");
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

$json = chilkat::CkJsonObject->new();
$json->UpdateString("type","pdfPage");
$json->UpdateString("pdf.path","qa_data/pdf/letterhead.pdf");

#  The page of the source PDF to use (1 by default).  "match" instead of a number places source
#  page n on target page n, which suits a set of per-page backgrounds.
$json->UpdateInt("pdf.page",1);

#  Behind the memo's own text, on page one, scaled to the page.
$json->UpdateString("zOrder","back");
$json->UpdateString("pages","first");
$json->UpdateString("scale.fit","page");
$json->UpdateString("id","letterhead");

$jsonOut = chilkat::CkJsonObject->new();
$success = $pdf->Watermark("add",$json,$jsonOut);
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

print "id: " . $jsonOut->stringOf("id") . " pages: " . $jsonOut->stringOf("pages") . "\r\n";

$success = $pdf->WriteFile("qa_output/memo_letterhead.pdf");
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

#  Sample output:

#  id: letterhead pages: 1