http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 13 May 2026 02:18:46 +0000 Tue, 19 Sep 2006 05:28:40 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=509 http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ http://www.quickpdf.org/forum/q-meaning-of-origin_topic509_post2245.html#2245 Author: ukobsa
Subject: 509
Posted: 19 Sep 06 at 5:28AM

Hi,

I have a pdf document with some very interesting values for mediabox, artbox and trimbox:

/MediaBox [ -90 -216 702 1008 ]
/TrimBox [ -90 -216 702 1008 ]
/ArtBox [ 0.499 -193.6718 613.2822 970.6782 ]

My question is: what is the meaning of Origin in this case?

if I start with Origin = poLeftBottom (default) and switch Origin to poLeftTop this results in a mediabox of
[-90, 216, 702, 1440]
as Top and Bottom are calculated as PageHeight - OriginalTop (OriginalBottom). But this values doesn't make very much sense for me.
This calculation only makes sense when mediabox starts with Left = 0 and Bottom = 0, so that the origin is always the according edgepoint of the mediabox.

But what to do in the above example. How should box coordinates be calculated when a origin switch occurs?

Thanks,
Uli

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