Remove Watermarks?

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   Hello,
I can add some watermarks (stamps) on all pages of an PDF.
I do this with

DrawRotatedText

This works fine.
My question is: 
Is there a way to remove the watermark again if the user want ?

---------------------------
    for ($p = 1; $p <= $qp->PageCount(); $p++) 
    {
        $qp->SelectPage($p);
        $qp->SetOrigin(1);            
        $qp->SetMeasurementUnits(0);  
        $qp->SelectFont($fid);
        $qp->SetTextAlign(1);    
        $qp->SetTextSize($ts);
        $qp->SetTextColor(0, 1, 1);
       $qp->SetTransparency($transp);
         $qp->DrawRotatedText($qp->PageWidth() / 2, $qp->PageHeight() / 2 + 40, $angle, $watermartext); 
    }
    $qp->SaveToFile("$actdir/view/work.pdf");
----------------------------

regards
hans

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hawkmaster Members Profile Find Members Posts Beginner Joined: 01 Apr 12 Status: Offline Points: 5	Post Options Post Reply Quote hawkmaster Report Post Thanks(0) Quote Reply Topic: Remove Watermarks? Posted: 19 Apr 12 at 3:10PM
	Hello, I can add some watermarks (stamps) on all pages of an PDF. I do this with DrawRotatedText This works fine. My question is: Is there a way to remove the watermark again if the user want ? --------------------------- for ($p = 1; $p <= $qp->PageCount(); $p++) { $qp->SelectPage($p); $qp->SetOrigin(1); $qp->SetMeasurementUnits(0); $qp->SelectFont($fid); $qp->SetTextAlign(1); $qp->SetTextSize($ts); $qp->SetTextColor(0, 1, 1); $qp->SetTransparency($transp); $qp->DrawRotatedText($qp->PageWidth() / 2, $qp->PageHeight() / 2 + 40, $angle, $watermartext); } $qp->SaveToFile("$actdir/view/work.pdf"); ---------------------------- regards hans

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 19 Apr 12 at 9:49PM
	Hi Hans! This would be hard stuff ... nearly impossible. If you wanna use such functionality you should prepare the pdf-documents in a different way. First you should use "SetLayer". Then insert your watermark and save it. If you want to remove the watermark you should check the layercount first (is there an additional layer?) and then you can use "DeleteLayer" and your watermark is off. Cheers, Ingo

ExchangeViews Members Profile Find Members Posts Team Player Joined: 13 Mar 12 Status: Offline Points: 38	Post Options Post Reply Quote ExchangeViews Report Post Thanks(0) Quote Reply Posted: 19 Jun 12 at 1:24PM
	Can you please tell me how to preview selected layer before using delete later?