[xep-support] Re: Image resolution in PDF output

Tue Dec 16 00:28:34 PST 2014

Thanks Kevin,
Your answer makes sense. I think we are in the case where we have a bitmap 
(screenshot) as a background of our SVG. We'll check the resolution of 
that bitmap. 
Sorry if my question was not clear. The problem I had was that, whatever 
the width and height defined in the SVG, I had to define the width in the 
Dita source file to get my image displayed at the "right" size in the PDF. 
For example, to have an image with a width of approximately 127mm in the 
PDF, I set the image width in Dita to 600px, which means that a 120 dpi 
resolution is applied. But you're right, this is probably because of the 
bitmap in the SVG.
Best regards,

Annette-consultant Bouillin 
IFU project lead for ONG - Assystem consultant 

FRESENIUS VIAL SAS 
Société par Actions Simplifiée 
au capital de 15 344 534,75 euros 
RCS Grenoble B 408 720 282 

Le Grand Chemin 
38590 Brézins - France 
T : +33 4 76 67 57 04 
F : +33 4 76 67 11 34 
annette-consultant.bouillin at fresenius-kabi.com 
www.fresenius-kabi.com 

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From:   "Kevin Brown" <kevin at renderx.com>
To:     "'RenderX Community Support List'" <xep-support at renderx.com>, 
Date:   15/12/2014 19:26
Subject:        [xep-support] Re: Image resolution in PDF output
Sent by:        "Xep-support" <xep-support-bounces at renderx.com>

I am trying to understand the question.

1)      If an image has no resolution inside the image itself, it will be 
treated as 120dpi – this applies to bitmap images only. 
2)      If an image has a resolution, it is used

**Now, this means only that whatever size you tell the image to be, it is 
placed “as is” inside that container as is. Nothing is done to it. No 
resolution is changed at all.

3)      If you are using SVG’s, there is no resolution (except for any 
bitmap you may have inside the SVG). A circle is a circle, a line is a 
line and a rectangle is a rectangle. They are not bits of data. It is 
drawn into the PDF as vector directives.

So to create a “print quality” PDF, insert bitmaps into the PDF that are 
300dpi at the size you are specifying for them. SVG has no impact on this 
as there is no “resolution”.

Kevin Brown
(650) 327-1000 Direct
(650) 328-8008 Fax
(925) 395-1772 Mobile
skype:kbrown01
kevin at renderx.com
sales at renderx.com
http://www.renderx.com 

From: Xep-support [mailto:xep-support-bounces at renderx.com] On Behalf Of 
Annette-consultant.Bouillin at fresenius-kabi.com
Sent: Monday, December 15, 2014 2:50 AM
To: xep-support at renderx.com
Subject: [xep-support] Image resolution in PDF output

Hello, 
>From what I saw in the user guide, it seems that the image resolution 
defaults to 120dpi when not set in the image description (for PDF output). 
I need to create PDFs with a resolution of 300 dpi (press quality) but 
can't find how to modify the default resolution. I'm using SVG graphic 
files and, by definition, they are resolution independent. Does anybody 
has had the same issue and found a solution?
Thanks & regards,

Annette-consultant Bouillin 
IFU project lead for ONG - Assystem consultant 

FRESENIUS VIAL SAS 
Société par Actions Simplifiée 
au capital de 15 344 534,75 euros 
RCS Grenoble B 408 720 282 

Le Grand Chemin 
38590 Brézins - France 
T : +33 4 76 67 57 04 
F : +33 4 76 67 11 34 
annette-consultant.bouillin at fresenius-kabi.com 
www.fresenius-kabi.com 

Ce message est à la seule attention du (ou des) destinataire(s) 
attitré(s). Il peut contenir des informations confidentielles ou privées 
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