72 points per inch not accurate in my experience

[Greg Diffor - School Perceptions]

I am experiencing measurement issues with iText.  Everything I read
shows that iText works on 72 points per inch, but when I print a
document nothing lines up the way I want.  After some experimenting, it
seems like I actually get 76.2 points per inch (which is 3 points per
millimeter)

Is this a common issue?  Because page sizes are calculated based on the
72 points per inch assumption, I am having no luck getting elements
lined up the way I want.

-G

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[Paulo Soares-3]

See if in the print dialog you are not scalling the page. Many printers also cannot print accurate dimension and when it comes to borders it gets even worse.

Paulo

> -----Original Message-----
> From: Greg Diffor - School Perceptions
> [mailto:gdiffor@...]
> Sent: Wednesday, November 04, 2009 5:16 PM
> To: itext-questions@...
> Subject: [iText-questions] 72 points per inch not accurate in
> my experience
>
> I am experiencing measurement issues with iText.  Everything I read
> shows that iText works on 72 points per inch, but when I print a
> document nothing lines up the way I want.  After some
> experimenting, it
> seems like I actually get 76.2 points per inch (which is 3 points per
> millimeter)
>
> Is this a common issue?  Because page sizes are calculated
> based on the
> 72 points per inch assumption, I am having no luck getting elements
> lined up the way I want.
>
> -G

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[1T3XT info]

Greg Diffor - School Perceptions wrote:
> I am experiencing measurement issues with iText.  Everything I read
> shows that iText works on 72 points per inch, but when I print a
> document nothing lines up the way I want.  After some experimenting, it
> seems like I actually get 76.2 points per inch (which is 3 points per
> millimeter)

Explain "experimenting".
Do you mean you are printing the document?
If so: are you sure you've disabled automatic scaling
to adapt the PDF to your printer?
In your print Dialog you have a property "Page Scaling".
Sounds like you've set it to "Shrink to printable area"
instead of "None".
--
This answer is provided by 1T3XT BVBA
http://www.1t3xt.com/ - http://www.1t3xt.info

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[Mark Storer-2]

"72 points per inch" is part of the definition of PDF, iText merely adopted it.

--Mark Storer
  Senior Software Engineer
  Cardiff.com

#include <disclaimer>
typedef std::Disclaimer<Cardiff> DisCard;

> -----Original Message-----
> From: Greg Diffor - School Perceptions
> [mailto:gdiffor@...]
> Sent: Wednesday, November 04, 2009 9:16 AM
> To: itext-questions@...
> Subject: [iText-questions] 72 points per inch not accurate in my
> experience
>
>
> I am experiencing measurement issues with iText.  Everything I read
> shows that iText works on 72 points per inch, but when I print a
> document nothing lines up the way I want.  After some
> experimenting, it
> seems like I actually get 76.2 points per inch (which is 3 points per
> millimeter)
>
> Is this a common issue?  Because page sizes are calculated
> based on the
> 72 points per inch assumption, I am having no luck getting elements
> lined up the way I want.
>
> -G
>
> --------------------------------------------------------------
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> Reports 2008 30-Day
> trial. Simplify your report design, integration and
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> _______________________________________________
> iText-questions mailing list
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> https://lists.sourceforge.net/lists/listinfo/itext-questions
>
> Buy the iText book: http://www.1t3xt.com/docs/book.php
> Check the site with examples before you ask questions:

http://www.1t3xt.info/examples/
You can also search the keywords list: http://1t3xt.info/tutorials/keywords/


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