http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 04 Apr 2026 10:13:02 +0000 Thu, 25 Mar 2010 17:39:26 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=1385 http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ http://www.quickpdf.org/forum/finding-extents-of-printable-entities_topic1385_post6290.html#6290 Author: jacob.hoover
Subject: 1385
Posted: 25 Mar 10 at 5:39PM

  For a more simplified view, assume I have a single page PDF with only a single line drawn on it from one inch in from the left side of the page and one inch down from the top of the page, to seven and a half inches in from the left side of the page and ten inches from the top of the page.  Given that, I would like to get the extents of the page and have this return a rectangle with the top left point being (1,1) and the bottom right point being (7.5, 10).

]]> Thu, 25 Mar 2010 17:39:26 +0000 http://www.quickpdf.org/forum/finding-extents-of-printable-entities_topic1385_post6290.html#6290 http://www.quickpdf.org/forum/finding-extents-of-printable-entities_topic1385_post6288.html#6288 Author: Paddy
Subject: 1385
Posted: 25 Mar 10 at 4:12PM

Can you provide more info on what you mean by "visible entities" exactly?]]> Thu, 25 Mar 2010 16:12:24 +0000 http://www.quickpdf.org/forum/finding-extents-of-printable-entities_topic1385_post6288.html#6288 http://www.quickpdf.org/forum/finding-extents-of-printable-entities_topic1385_post6287.html#6287 Author: jacob.hoover
Subject: 1385
Posted: 25 Mar 10 at 4:04PM

I'm seeing a few looks but no comments.  Is my question not clear enough, or is there no way that anyone knows of to get the extents of visible entities in a PDF?

Thanks,
Jacob
]]> Thu, 25 Mar 2010 16:04:29 +0000 http://www.quickpdf.org/forum/finding-extents-of-printable-entities_topic1385_post6287.html#6287 http://www.quickpdf.org/forum/finding-extents-of-printable-entities_topic1385_post6278.html#6278 Author: jacob.hoover
Subject: 1385
Posted: 24 Mar 10 at 2:24PM

I was wondering if anyone has ever used (or if it's even possible) the QuickPDF library to fid the extents of visible entities of a PDF document.

What I am trying to do is merge multiple pages together but only taking the sections with visible elements from each page. Our existing code base uses another library to vectorize the PDF to an image, and then the image is scanned line by line for any pixel that isn't of the background color.

I'm thinking there has to be an easier way of detecting the extents of entities in a native format, but I have yet to find a method that works.  (I thought I was close with http://www.quickpdflibrary.com/help/quickpdf/GetPageBox.php, but it always returns the full extents of the PDF [page width/height])
]]> Wed, 24 Mar 2010 14:24:41 +0000 http://www.quickpdf.org/forum/finding-extents-of-printable-entities_topic1385_post6278.html#6278