Delphi ActiveX 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. Delphi ActiveX

var
success: Integer;
pdf: TChilkatPdf;
json: TChilkatJsonObject;
jsonOut: TChilkatJsonObject;

begin
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 := TChilkatPdf.Create(Self);
success := pdf.LoadFile('qa_data/pdf/two_page_memo.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

json := TChilkatJsonObject.Create(Self);
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 := TChilkatJsonObject.Create(Self);
success := pdf.Watermark('add',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('id: ' + jsonOut.StringOf('id') + ' pages: ' + jsonOut.StringOf('pages'));

success := pdf.WriteFile('qa_output/memo_letterhead.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

//  Sample output:

//  id: letterhead pages: 1