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Subject: RE: [docbook] Scale Image to fit in width or leave unscaled


This is one I have been battling (as a self-taught to novice Docbook user), for some time. I was trying to find a common solution for block and inline images. What worked in Docbook 4 did not necessarily work after upgrading to Docbook 5. Two mins after documenting my solution for my team, your mail came in.

 

I tried all sorts of combinations of attributes and xsl styling. I ended up removing nearly all the image sizing content in our customisation layer and settled on this.

 

For an image that is too wide, add scalefit="1" and contentwidth="100%" attributes to the <imagegedata> tag: e.g

 

<mediaobject>

    <imageobject>

        <imagedata fileref="images/excel_ccode.png"/>

    </imageobject>

</mediaobject>

becomes

 

<mediaobject>

    <imageobject>

        <imagedata scalefit="1" width="100%" fileref="images/excel_ccode.png"/>

    </imageobject>

</mediaobject>

 

2 For an image that is too high to fit onto a page, add scalefit="1" and contentwidth="100%" attributes to the <imagegedata> tag

 

For inline media objects, I just resize them in an image editor – don’t know if this is practical in your case though.

 

There may be other considerations depending on your build tool chain.

 

I am sure that experts will have a much more sophisticated customisation layer solution, but this is simple, works for me and I can easily roll out to the rest of my team. I do look forward to seeing solutions from more expert users.

 

I’d love to get some feedback.

 

Cheers

Greg

 

 

From: Paul Baumer [mailto:paul.baumer2@gmail.com]
Sent: 17 October 2016 03:29 PM
To: docbook@lists.oasis-open.org
Subject: [docbook] Scale Image to fit in width or leave unscaled

 

Hello,

 

I would like to achieve the following image resizing as a general rule in my docbook5. I generate the docbook myself using python. And finally I generate pdf from the docbook.

 

if image width will not fit the page

   it shall be resized to fit in width

else

   image size shall be left unchanged

 

I am aware of the scalefit, scale, width and content width. But I am having difficulty in using a combination of those to achieve the desired logic above.

 

Paul


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