DocBook <imagedata/> and scalefit attribute

[dnedrow]

Is there a [relatively] simple means of defining the viewport size of an <imagedata/> tag to the size of another element, possibly the enclosing element?

For example, in PDF output, I want the image scaled to fit the size of <figure/>, or, at the worst, <para/>. Anyway to handle this for the sample shown below?

Code: Select all

   <para>Test

    <figure>

     <title>Static Web</title>

     <mediaobject>

      <imageobject role="html">

       <imagedata fileref="diagrams/static.png"/>

      </imageobject>

      <imageobject role="fo">

       <imagedata format="PDF" fileref="diagrams/static.pdf"/>

      </imageobject>

     </mediaobject>

    </figure>

   </para>

-David

[george]

Hi David,

I noticed you posted this on the xsl list, I think you have better chances to get a response on the docbook-apps list:

http://lists.oasis-open.org/archives/docbook-apps/
http://lists.oasis-open.org/

If someone here will know how to do what you asked we will surely post a reply.

Best Regards,
George

[dnedrow]

I noticed you posted this on the xsl list, I think you have better chances to get a response on the docbook-apps list:

Good idea. I had forgotten about docbook-apps. Since this was more of a presentation issue, I hesitated to post to the main docbook list.

-David

[dnedrow]

I think what you want to do is described in Bob Stayton's book here:

http://www.sagehill.net/docbookxsl/ImageSizing.html

In particular:

To keep a graphic for printed output at its natural size unless it
is too large to fit the available width, in which case shrink it to
fit, use scalefit="1", width="100%", and contentdepth="100%"
attributes.

This did work using the updated fo/graphics.xsl.

Eg.

Code: Select all

   <para>

    <figure>

     <title>Static Web</title>

     <mediaobject>

      <imageobject role="html">

       <imagedata fileref="diagrams/static.png"/>

      </imageobject>

      <imageobject role="fo">

       <imagedata scalefit="1" width="100%" contentdepth="100%" 

        format="PDF" fileref="diagrams/static.pdf"/>

      </imageobject>

     </mediaobject>

    </figure>

   </para>

DocBook XSL Stylesheets 1.68.1

You will need to replace fo/graphics.xsl with the current version from
CVS---this functionality only works post-1.68.1.

The odd thing is that the updated fo/graphics.xsl appears to require that img.src.path be defined. I simply set this to "'./'", but I wonder if this isn't a bug in the CVS stylesheet.

-David