I need help - I can help - Background image in existing PDF

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Background image in existing PDF

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=1947
Printed Date: 15 May 25 at 11:12AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Background image in existing PDF

Posted By: nexent
Subject: Background image in existing PDF
Date Posted: 07 Sep 11 at 3:15PM

Hi there,

I'm using QuickPDFLite0725.PDFLibrary in VB6.
I need to add a background image (fitting all page) in every page of an existing PDF created by Crystal Reports 9.

I've tried the following code:

   QP.LoadFromFile SourceFile

   Dim lngImage As Long
   lngImage = QP.AddImageFromFile(ImageFile, 0)

   Dim I As Integer
   For I = 1 To QP.PageCount() '- 1
      QP.SelectPage I
      QP.SelectImage lngImage
      QP.SetOrigin 1

      QP.DrawImage 0, 0, QP.PageWidth(), QP.PageHeight()
   Next

   QP.SaveToFile TargetFile

The first problem is that the image is drawn over the existing content, and not behind.
The second (maybe a bug?) is that the image is drawn mirrored.
Any ideas?

I could buy the full version, if that would solve the problem.
Thanks.

Replies:

Posted By: AndrewC
Date Posted: 07 Sep 11 at 3:21PM

There is a function on the full version that fixes the Mirroring problem.

QP.NormalizePage(page);

To draw the background underneath you would need to use the CapturePage and DrawCapturedPage functions which are not available in the Lite version.

There is a 30 day trial available as well which will make it easier to decide.

Andrew.

Posted By: nexent
Date Posted: 07 Sep 11 at 3:29PM

Hi Andrew,

thanks for your quick reply.
Can you give me some sample code for the CapturePage and DrawCapturedPage functions?
I could test using the trial, I need to solve the problem asap.

Thanks again

Posted By: AndrewC
Date Posted: 07 Sep 11 at 4:12PM

This code should do everything you need. You just need to put your image drawing code in where I have indicated. This will work on multiple page PDF's and also for a single page PDF.

Basically when you capture a page, that page is deleted and the contents are captured. So we add a new page to the end of the document and draw the captured page onto that new page. We then repeat the process for each page.

double pageWidth, pageHeight;

int capturedPageId;

int ret = QP.LoadFromFile("Pages.pdf", "");

QP.SetOrigin(1);

int numPages = QP.PageCount();

int pageId;

for (int i = 1; i <= numPages; i++)

{

QP.SelectPage(1); // Always select page 1 as the pages get deleted.

QP.NormalizePage(0); // Fix the page mirroring.

pageWidth = QP.PageWidth();

pageHeight = QP.PageHeight();

capturedPageId = QP.CapturePage(1); // This deletes the page from the document.

pageId = QP.NewPage();

QP.SetPageDimensions(pageWidth, pageHeight);

// TODO -----------------------------------

// Draw your stamp or background image here

// TODO -----------------------------------

// Now draw the original page on top.

ret = QP.DrawCapturedPage(capturedPageId, 0, 0, QP.PageWidth(), QP.PageHeight());

}

QP.SaveToFile("newpages.pdf");

Posted By: nexent
Date Posted: 07 Sep 11 at 5:53PM

There's a problem... :(
my collegue already installed trial version 7.26 on development pc, and that version has expired a few days ago.

Now, I have installed version 8.11, but I've got a message stating that the trial license key "could not be validated" (obviously... ;)

Can I have a new key for the 8.11 version?
Thanks

Posted By: nexent
Date Posted: 08 Sep 11 at 9:32AM

Never mind, problem solved.
Thanks