Debenu Quick PDF Library - PDF SDK Community Forum : Problems drawing on a PDF http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Fri, 01 May 2026 05:07:35 +0000 Mon, 19 Aug 2013 01:07:54 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=2698 <![CDATA[Debenu Quick PDF Library - PDF SDK Community Forum]]> http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ <![CDATA[Problems drawing on a PDF : Eric,PDF files were never designed...]]> http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11112.html#11112 Author: AndrewC
Subject: 2698
Posted: 19 Aug 13 at 1:07AM

Eric,

PDF files were never designed to be manipulated.  They were almost designed as a readonly format until people want to start doing useful things with their PDF files such as splitting, merging, stamping etc..

When you create a new PDF it will start off with the origin point (0,0) in the bottom left corner, the rotation in 0 degrees and the units as points (ie.  72points per inch), a black pen and a white background.  Many PDF's change these values in the content stream during the creation process.  If is good practice to call SaveState ('q') as the very first call in the content stream and RestoreState ('Q') as the very last operation.  Many PDF produces do not do restore the graphics state at the end so when DQPL appends drawing commands such as DrawText it can be affected by the unknown drawing state and so can be drawn at the wrong angle in the wrong color in the wrong position or even off of the page in many cases.

NormalizePage is designed to place SaveState/RestoreState commands at the start and end of the contentstream(s) respectively so that the drawing state is known and can be trusted.  NormalizePage works on 99.9% of problem PDF's and it generally recommended to be called before adding any text, graphics or logos to an existing PDF file.  Sometimes PDF producers add more SaveState calls than RestoreState calls so NormalizePage(1) will attempt to count and then balance out the Save/Restore calls.

Andrew.
]]> Mon, 19 Aug 2013 01:07:54 +0000 http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11112.html#11112 <![CDATA[Problems drawing on a PDF : Cause there&#039;s something special...]]> http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11110.html#11110 Author: Ingo
Subject: 2698
Posted: 18 Aug 13 at 10:07PM

Cause there's something special with this single pdf.
Something curious happened while creating ... who knows?
We don't have this pdf - so we won't know.
But this all doesn't matter cause we've a main medecine "NormalizePage" ;-)




Edited by Ingo - 18 Aug 13 at 10:09PM]]> Sun, 18 Aug 2013 22:07:40 +0000 http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11110.html#11110 <![CDATA[Problems drawing on a PDF : Just curious, but why is this...]]> http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11108.html#11108 Author: Eric24
Subject: 2698
Posted: 18 Aug 13 at 7:33PM

Just curious, but why is this is the solution?]]> Sun, 18 Aug 2013 19:33:07 +0000 http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11108.html#11108 <![CDATA[Problems drawing on a PDF : Hi Andrew,thank you very much!...]]> http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11062.html#11062 Author: Kudermann
Subject: 2698
Posted: 05 Aug 13 at 8:24AM

Hi Andrew,

thank you very much! Thats the solution.

Jutta
]]> Mon, 05 Aug 2013 08:24:48 +0000 http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11062.html#11062 <![CDATA[Problems drawing on a PDF : Jutta,Can you try calling QP.NormalizePage(0);...]]> http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11060.html#11060 Author: AndrewC
Subject: 2698
Posted: 04 Aug 13 at 9:05AM

Jutta,

Can you try calling QP.NormalizePage(0); before calling DrawBox ?  

If it works then NormalizePage will need to be be called once for each page that you want to use DrawBox, DrawText etc..

Andrew.
]]> Sun, 04 Aug 2013 09:05:35 +0000 http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11060.html#11060 <![CDATA[Problems drawing on a PDF : Hi,i have a PDF where the function...]]> http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11058.html#11058 Author: Kudermann
Subject: 2698
Posted: 02 Aug 13 at 11:23AM

Hi,

i have a PDF where the function DrawBox returns 1. But there is nothing painted on the PDF after i save it and open it.
The security info of the document show me the following results:
Security Method: None
User Password: No
Owner Password: No
Printing: Fully Allowed
Changing the Document: Allowed
Content Copying or Extraction: Allowed
Authoring Comments and Form Fields: Allowed
Form Field Fill-in or Signing: Allowed
Content Accessibility Enabled: Allowed
Document Assembly: Allowed
Encryption Level: Blank
Opened with User password: No
Opened with Owner password: No
Variable Encryption Strength: None

The DrawBox functions works perfect for other PDFs with the same security info results. Only this PDF doesnt work.
Now the question: what can be the reason for this behaviour and how can i check it?  
I am using Debenu Quick PDF Library 9.15

No problem to upload the PDF for further tests.

Jutta Kudermann]]> Fri, 02 Aug 2013 11:23:39 +0000 http://www.quickpdf.org/forum/problems-drawing-on-a-pdf_topic2698_post11058.html#11058