AutoIt Requires Chilkat v11.7.0+

Add an Image (Logo) Watermark to a PDF

See more PDF Watermark Examples

Demonstrates an image watermark placed in a corner of every page. The image is a PNG or JPEG given either by path ("image.path") or, as here, as base64 in the JSON itself ("image.base64"), which suits a server that keeps its logo in a database rather than on disk. PNG transparency is kept. Giving only a width keeps the aspect ratio, and the units member says those numbers are inches rather than points. AutoIt

Local $bSuccess = False

;  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 four_pages.pdf

$oPdf = ObjCreate("Chilkat.Pdf")
$bSuccess = $oPdf.LoadFile("qa_data/pdf/four_pages.pdf")
If ($bSuccess = False) Then
    ConsoleWrite($oPdf.LastErrorText & @CRLF)
    Exit
EndIf

$oJson = ObjCreate("Chilkat.JsonObject")
$oJson.UpdateString("type","image")

;  A small PNG logo, base64 encoded.  Use "image.path" instead to name a PNG or JPEG file:
;     ignore = json.UpdateString("image.path","logo.png");
$oJson.UpdateString("image.base64","iVBORw0KGgoAAAANSUhEUgAAAGAAAAAgCAYAAADtwH1UAAAApElEQVR42u3a7QmAIBgAYTdpo/ZphhZti6IBylLrlXoO/G3cIeFHSgAAFDKM08rCy8Jzg6Ug8UJ0JF+EDuSXRGgxX8+jufxlTk0nFuCCiF360aidXICMiDP5uQgCXAxQI782ggAHEu7IP4sgQOcBIMA35ItgBQhQEqBmtbX6xl//hAUI3gcIELwTFiD4LEiA4NNQAYLvA+BGzJ0wvIrwLggA8DgbwPbrr8c7+lkAAAAASUVORK5CYII=")

;  The size to draw it at.  Give only the width and the height follows the aspect ratio.
$oJson.UpdateString("units","in")
$oJson.UpdateNumber("image.width","1.5")

;  Bottom-right, half an inch in from the page edges.
$oJson.UpdateString("position.align","bottomRight")
$oJson.UpdateNumber("position.margin","0.5")
$oJson.UpdateNumber("opacity","0.85")
$oJson.UpdateString("id","logo")

$oJsonOut = ObjCreate("Chilkat.JsonObject")
$bSuccess = $oPdf.Watermark("add",$oJson,$oJsonOut)
If ($bSuccess = False) Then
    ConsoleWrite($oPdf.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("id: " & $oJsonOut.StringOf("id") & " pages: " & $oJsonOut.StringOf("pages") & @CRLF)

$bSuccess = $oPdf.WriteFile("qa_output/four_pages_logo.pdf")
If ($bSuccess = False) Then
    ConsoleWrite($oPdf.LastErrorText & @CRLF)
    Exit
EndIf

;  Sample output:

;  id: logo pages: 1-4