DataFlex Requires Chilkat v11.7.0+

A PDF Watermark That Only Appears When Printed

See more PDF Watermark Examples

Demonstrates a watermark that is invisible on screen and appears on paper, which is what a "printed copies are uncontrolled" marking needs. Two approaches can do it: an optional-content layer with layer.view off and layer.print on, which also gives the reader an entry in the layers panel of the viewer (layer.locked stops them switching it), and a Watermark annotation with annotation.view false and annotation.print true. annotation.fixedPrint keeps the printed size and position the same whatever paper it goes on. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoPdf
    Variant vJson
    Handle hoJson
    Variant vJsonOut
    Handle hoJsonOut
    Handle hoPdf2
    Variant vJson2
    Handle hoJson2
    String sTemp1
    String sTemp2

    Move False To iSuccess

    //  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

    Get Create (RefClass(cComChilkatPdf)) To hoPdf
    If (Not(IsComObjectCreated(hoPdf))) Begin
        Send CreateComObject of hoPdf
    End
    Get ComLoadFile Of hoPdf "qa_data/pdf/two_page_memo.pdf" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get ComUpdateString Of hoJson "type" "text" To iSuccess
    Get ComUpdateString Of hoJson "text" "UNCONTROLLED WHEN PRINTED" To iSuccess
    Get ComUpdateString Of hoJson "id" "printonly" To iSuccess

    //  As a layer: off on screen, on when printing, and locked so the reader cannot switch it on.
    Get ComUpdateString Of hoJson "approach" "layer" To iSuccess
    Get ComUpdateString Of hoJson "layer.name" "Print marking" To iSuccess
    Get ComUpdateString Of hoJson "layer.view" "off" To iSuccess
    Get ComUpdateString Of hoJson "layer.print" "on" To iSuccess
    Get ComUpdateBool Of hoJson "layer.locked" True To iSuccess

    Get ComUpdateString Of hoJson "rotation" "diagonal" To iSuccess
    Get ComUpdateString Of hoJson "scale.fit" "page" To iSuccess
    Get ComUpdateNumber Of hoJson "scale.fitPercent" "70" To iSuccess
    Get ComUpdateNumber Of hoJson "opacity" "0.3" To iSuccess

    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonOut
    If (Not(IsComObjectCreated(hoJsonOut))) Begin
        Send CreateComObject of hoJsonOut
    End
    Get pvComObject of hoJson to vJson
    Get pvComObject of hoJsonOut to vJsonOut
    Get ComWatermark Of hoPdf "add" vJson vJsonOut To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComStringOf Of hoJsonOut "id" To sTemp1
    Get ComStringOf Of hoJsonOut "pages" To sTemp2
    Showln "layer id: " sTemp1 " pages: " sTemp2

    Get ComWriteFile Of hoPdf "qa_output/memo_print_only.pdf" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  The same thing as an annotation instead.
    Get Create (RefClass(cComChilkatPdf)) To hoPdf2
    If (Not(IsComObjectCreated(hoPdf2))) Begin
        Send CreateComObject of hoPdf2
    End
    Get ComLoadFile Of hoPdf2 "qa_data/pdf/two_page_memo.pdf" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf2 To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson2
    If (Not(IsComObjectCreated(hoJson2))) Begin
        Send CreateComObject of hoJson2
    End
    Get ComUpdateString Of hoJson2 "type" "text" To iSuccess
    Get ComUpdateString Of hoJson2 "text" "UNCONTROLLED WHEN PRINTED" To iSuccess
    Get ComUpdateString Of hoJson2 "id" "printonly2" To iSuccess
    Get ComUpdateString Of hoJson2 "approach" "annotation" To iSuccess
    Get ComUpdateBool Of hoJson2 "annotation.view" False To iSuccess
    Get ComUpdateBool Of hoJson2 "annotation.print" True To iSuccess
    Get ComUpdateBool Of hoJson2 "annotation.fixedPrint" True To iSuccess
    Get ComUpdateString Of hoJson2 "rotation" "diagonal" To iSuccess
    Get pvComObject of hoJson2 to vJson2
    Get pvComObject of hoJsonOut to vJsonOut
    Get ComWatermark Of hoPdf2 "add" vJson2 vJsonOut To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf2 To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComStringOf Of hoJsonOut "id" To sTemp1
    Showln "annotation id: " sTemp1

    //  Sample output:

    //  layer id: printonly pages: 1-2
    //  annotation id: printonly2


End_Procedure