Re: [docbook-apps] svg figure role

["Chris Chiasson" <chris@chiasson.name>]

The SVG I am working with has no intrinsic size. I see that by
specifying contentwidth and contentdepth (?? height??) I can obtain a
larger or smaller picture than to what Firefox defaults. If I specify
contentwidth or contentdepth in inches, I notice that the xhtml output
has been changed to a number of pixels. The conversion factor appears
to be 90 pixels per inch. Grepping the stylesheet distribution for
"90" reveals this is associated with a parameter called
"pixels.per.inch".

My display is calibrated to 86 ppi (the physical ppi of the monitor at
this resolution and the ppi at which I have set Windows to render the
screen). I will probably change pixels.per.inch to 86 in the
stylesheet customization layer. However, this won't help people with
displays that have a different dpi.

Why is it that the stylesheet writes the final size of the image in
pixels? Is there a way to turn this behavior off?

On 4/19/06, Chris Chiasson <chris@chiasson.name> wrote:
> I feel dumb. I had set use.role.for.mediaobject to zero a while back.
> This was before I figured out that I didn't need to be so strict with
> the way I was profiling everything and before I figured out that
> profile.condition is what I should have been using for profiling in
> most cases that aren't covered by the default operation of the
> stylesheets.
>
> Now, in the xhtml case, the output includes, which produces no image in Firefox.
>
> <img src="Gravimetric_and_Gasometric_Determination_of_Zinc/Vacuum_Flask.svg"
> alt="Vacuum Flask"/>
>
> If I manually change the xhtml to read
>
> <object data="Gravimetric_and_Gasometric_Determination_of_Zinc/Vacuum_Flask.svg"
> type="image/svg+xml"/>
>
> the svg shows up.
>
> It turns out that setting the attribute format="SVG" on the imagedata
> tag does this modification, which must be what Bob Stayton is
> referring to in his guide at
>
> http://www.sagehill.net/docbookxsl/SVGimages.html
>
> when he says, "Be sure to include the format="SVG" attribute to ensure
> the file is handled properly."
>
> I am wondering, is there a technical reason why outputting an object
> tag requires a format attribute on the imagedata tag instead of being
> able to guess the format from the fileref attribute?
>
> Again, thanks to Bob S. for his help (and awesome style sheet
> programming) - I have no idea how long it would have taken me to
> discover the parameter that was causing this behavior if he hadn't
> mentioned it by name.
>
> On 4/19/06, Bob Stayton <bobs@sagehill.net> wrote:
> > Hi Chris,
> > I'm not able to duplicate your problem.  When I process your
> > figure element with 1.69.1/xhtml/docbook.xsl, the output file has
> > img referencing the svg file.  When I process your figure element
> > with 1.69.1/html/docbook.xsl, the output file has img referencing
> > the png file.  Reversing the order of the imageobjects inside the
> > mediaobject has no effect.  Have you changed the stylesheet
> > parameter use.role.for.mediaobject to zero from the default value
> > of 1, by any chance?  Selecting by order and not role is the
> > behavior you get when that parameter is set to zero.
> >
> > When you see a blank, does your output file reference the svg
> > file?  If so, then the stylesheet is doing the right thing and it
> > seems the problem is with the browser not displaying the embedded
> > SVG image.
> >
> > Bob Stayton
> > Sagehill Enterprises
> > DocBook Consulting
> > bobs@sagehill.net
> >
> >
> > ----- Original Message -----
> > From: "Chris Chiasson" <chris@chiasson.name>
> > To: "docbook-apps List" <docbook-apps@lists.oasis-open.org>
> > Sent: Tuesday, April 18, 2006 3:31 PM
> > Subject: [docbook-apps] svg figure role
> >
> >
> > Dear docbook-apps,
> >
> > I am trying to make an svg file appear in xhtml output and a png
> > file
> > appear in html output. I don't believe I have any profile.role =
> > blahblah statements in my customization layer or on the command
> > line.
> > When I order the png image first (along with the html role
> > statement),
> > both xhtml and html output contain the png file. When I order the
> > svg
> > image first (along with the xhtml role statement) both xhtml and
> > html
> > output contain a blank spot where the svg should be. I'm using
> > docbook
> > xsl 1.69.1.
> >
> > ****What's going on here?? How do I make the svg and xhtml pair
> > up
> > while also pairing the png and html?? Why isn't the svg rendering
> > at
> > all?****
> >
> > note: the files are linked at the bottom.
> >
> >       <figure>
> >         <title>Vacuum Flask</title>
> >         <mediaobject>
> >           <imageobject role="html">
> >             <imagedata
> > fileref="Gravimetric_and_Gasometric_Determination_of_Zinc/Vacuum_Flask.png"/>
> >           </imageobject>
> >           <imageobject role="xhtml">
> >             <imagedata
> > fileref="Gravimetric_and_Gasometric_Determination_of_Zinc/Vacuum_Flask.svg"/>
> >           </imageobject>
> >           <imageobject role="fo">
> >             <imagedata
> > fileref="Gravimetric_and_Gasometric_Determination_of_Zinc/Vacuum_Flask.eps"/>
> >           </imageobject>
> >         </mediaobject>
> >       </figure>
> >
> > Here are links to the relevant files:
> > http://chris.chiasson.name/Fuel_Cell_Electrochemistry/Fuel_Cell_Electrochemistry.xhtml
> > http://chris.chiasson.name/Fuel_Cell_Electrochemistry/Gravimetric_and_Gasometric_Determination_of_Zinc/Vacuum_Flask.svg
> > http://chris.chiasson.name/Fuel_Cell_Electrochemistry/Fuel_Cell_Electrochemistry.html
> > http://chris.chiasson.name/Fuel_Cell_Electrochemistry/Gravimetric_and_Gasometric_Determination_of_Zinc/Vacuum_Flask.png
> >
> > Thank you for your help,
> > --
> > http://chris.chiasson.name/
> >
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> >
> >
> >
> >
>
>
> --
> http://chris.chiasson.name/
>


--
http://chris.chiasson.name/