Xbase++ 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. Xbase++

LOCAL nSuccess
LOCAL oPdf
LOCAL oJson
LOCAL oJsonOut

nSuccess := 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

oPdf := CreateObject("Chilkat.Pdf")
nSuccess := oPdf:LoadFile("qa_data/pdf/two_page_memo.pdf")
IF (nSuccess == 0)
    ? oPdf:LastErrorText
    oPdf:destroy()
    RETURN
ENDIF

oJson := CreateObject("Chilkat.JsonObject")
oJson:UpdateString("type", "pdfPage")
oJson: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.
oJson:UpdateInt("pdf.page", 1)

//  Behind the memo's own text, on page one, scaled to the page.
oJson:UpdateString("zOrder", "back")
oJson:UpdateString("pages", "first")
oJson:UpdateString("scale.fit", "page")
oJson:UpdateString("id", "letterhead")

oJsonOut := CreateObject("Chilkat.JsonObject")
nSuccess := oPdf:Watermark("add", oJson, oJsonOut)
IF (nSuccess == 0)
    ? oPdf:LastErrorText
    oPdf:destroy()
    oJson:destroy()
    oJsonOut:destroy()
    RETURN
ENDIF

? "id: " + oJsonOut:StringOf("id") + " pages: " + oJsonOut:StringOf("pages")

nSuccess := oPdf:WriteFile("qa_output/memo_letterhead.pdf")
IF (nSuccess == 0)
    ? oPdf:LastErrorText
    oPdf:destroy()
    oJson:destroy()
    oJsonOut:destroy()
    RETURN
ENDIF

//  Sample output:

//  id: letterhead pages: 1

oPdf:destroy()
oJson:destroy()
oJsonOut:destroy()