Debenu Quick PDF Library - PDF SDK Community Forum : Determining the DPI of the Canvas? http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 04 Apr 2026 23:12:37 +0000 Thu, 09 Oct 2014 14:47:18 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=2984 <![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[Determining the DPI of the Canvas? : Thanks - looks like a great article!...]]> http://www.quickpdf.org/forum/determining-the-dpi-of-the-canvas_topic2984_post12064.html#12064 Author: stevemaughan
Subject: 2984
Posted: 09 Oct 14 at 2:47PM

Thanks - looks like a great article!]]> Thu, 09 Oct 2014 14:47:18 +0000 http://www.quickpdf.org/forum/determining-the-dpi-of-the-canvas_topic2984_post12064.html#12064 <![CDATA[Determining the DPI of the Canvas? : btw.this is described here:htt...]]> http://www.quickpdf.org/forum/determining-the-dpi-of-the-canvas_topic2984_post12063.html#12063 Author: mLipok
Subject: 2984
Posted: 09 Oct 14 at 2:43PM

btw.
this is described here:

http://www.debenu.com/kb/map-pdf-coordinates-delphi-graphics-canvas-coordinates/



Edited by mLipok - 09 Oct 14 at 2:46PM]]> Thu, 09 Oct 2014 14:43:52 +0000 http://www.quickpdf.org/forum/determining-the-dpi-of-the-canvas_topic2984_post12063.html#12063 <![CDATA[Determining the DPI of the Canvas? : Wonderful!Many thanks,Steve ]]> http://www.quickpdf.org/forum/determining-the-dpi-of-the-canvas_topic2984_post12060.html#12060 Author: stevemaughan
Subject: 2984
Posted: 08 Oct 14 at 3:20PM

Wonderful!

Many thanks,

Steve
]]> Wed, 08 Oct 2014 15:20:30 +0000 http://www.quickpdf.org/forum/determining-the-dpi-of-the-canvas_topic2984_post12060.html#12060 <![CDATA[Determining the DPI of the Canvas? : You pick the dpi yourself when...]]> http://www.quickpdf.org/forum/determining-the-dpi-of-the-canvas_topic2984_post12056.html#12056 Author: erico
Subject: 2984
Posted: 08 Oct 14 at 3:06PM

You pick the dpi yourself when you RenderPageToDC (or DARenderPageToDC). It is one of the parameters:

int DPLDARenderPageToDC(int InstanceID, int FileHandle, int PageRef,  double DPI, HDC DC);

Maybe I misunderstood. You want to know what value to supply. Look at the response to
Previewing a PDF before Saving?

This shows the appropriate calculations to create a device context with the correct dpi


Edited by erico - 08 Oct 14 at 3:15PM]]> Wed, 08 Oct 2014 15:06:31 +0000 http://www.quickpdf.org/forum/determining-the-dpi-of-the-canvas_topic2984_post12056.html#12056 <![CDATA[Determining the DPI of the Canvas? : Hi -I&#039;d like to draw a map...]]> http://www.quickpdf.org/forum/determining-the-dpi-of-the-canvas_topic2984_post12053.html#12053 Author: stevemaughan
Subject: 2984
Posted: 08 Oct 14 at 1:11PM

Hi - 

I'd like to draw a map as a PDF file. This will require a lot of vector graphics. To do this I need to know the resolution of the canvas (e.g. pixels per inch). Or I need to set the resolution of the canvas. Is this possible? If so, how can I do it?

Thanks,

Steve
]]> Wed, 08 Oct 2014 13:11:55 +0000 http://www.quickpdf.org/forum/determining-the-dpi-of-the-canvas_topic2984_post12053.html#12053