Debenu Quick PDF Library - PDF SDK Community Forum : Asymmetrical DPI Rendering http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 04 May 2026 11:02:36 +0000 Thu, 11 Oct 2012 14:25:20 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=2415 <![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[Asymmetrical DPI Rendering : Yes, that&#039;s correct. It&#039;s...]]> http://www.quickpdf.org/forum/asymmetrical-dpi-rendering_topic2415_post10220.html#10220 Author: Eric24
Subject: 2415
Posted: 11 Oct 12 at 2:25PM

Yes, that's correct. It's subtle, but rendering a fax at 200x200 or 200x100 causes just enough distortion to cause problems. I've experimented with things like rendering at very high resolution (i.e. 400x400 or 600x600) and then resizing the resulting image to 204x196. That actually works reasonably well, but the overhead of rendering such a large file makes it unusably slow.

As-is, the RenderPageToFile or RenderDocumentToFile functions are ideal for my purpose, with the one exception of the single DPI parameter. If it had DPIX and DPIY, I'd be golden!

PS - I'm assuming that using the RenderPageToFile function on a multi-page document that's already been loaded into memory doesn't have to "re parse" the entire PDF file for each call to RenderPageToFile?
]]> Thu, 11 Oct 2012 14:25:20 +0000 http://www.quickpdf.org/forum/asymmetrical-dpi-rendering_topic2415_post10220.html#10220 <![CDATA[Asymmetrical DPI Rendering : I would be interested in this...]]> http://www.quickpdf.org/forum/asymmetrical-dpi-rendering_topic2415_post10181.html#10181 Author: tfrost
Subject: 2415
Posted: 29 Sep 12 at 11:58AM

I would be interested in this feature also.  For fax images.  204x196 can be approximated with 200x200, but to create a low-resolution 204x98 you can usually get better quality going direct than converting high to low.]]> Sat, 29 Sep 2012 11:58:11 +0000 http://www.quickpdf.org/forum/asymmetrical-dpi-rendering_topic2415_post10181.html#10181 <![CDATA[Asymmetrical DPI Rendering : I am wondering why you you need...]]> http://www.quickpdf.org/forum/asymmetrical-dpi-rendering_topic2415_post10164.html#10164 Author: AndrewC
Subject: 2415
Posted: 24 Sep 12 at 8:46AM

I am wondering why you you need asymmetrical DPI rendering for ?  Fax images ?

Andrew.
]]> Mon, 24 Sep 2012 08:46:25 +0000 http://www.quickpdf.org/forum/asymmetrical-dpi-rendering_topic2415_post10164.html#10164 <![CDATA[Asymmetrical DPI Rendering : Anything on the horizon forasymmetrical...]]> http://www.quickpdf.org/forum/asymmetrical-dpi-rendering_topic2415_post10161.html#10161 Author: Eric24
Subject: 2415
Posted: 23 Sep 12 at 10:18PM

Anything on the horizon for asymmetrical DPI rendering?]]> Sun, 23 Sep 2012 22:18:22 +0000 http://www.quickpdf.org/forum/asymmetrical-dpi-rendering_topic2415_post10161.html#10161