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Subject: RE: [docbook-apps] intrinsic size of images

I was following this thread as I was working with image sizing at the time. I changed the attribute contentheight to contentdepth as per the comments. This removed a validation error I was receiving (Attribute "contentheight" must be declared for element type "imagedata"). However, I encountered problems with images not displaying in HTML (ok in PDF). It seems contentdepth has a problem when used with the param ignore.image.scaling (set to non-zero) in my customization layer (chunk) . I did notice that images that don't have attributes are displayed e.g. those attached to the <note> tag still displayed in HTML.
Using contentdepth and setting ignore.image.scaling" select="'0'" displays the image HTML (but not very nicely though). As a result I am currently setting ignore.image.scaling to non-zero and use the attribute contentheight as this gives the required output. However, I still left with a validation error.
I am a newbie to Docbook so may be in error or mis-understanding but something doesn't seem quite right.
-----Original Message-----
From: Bob Stayton [mailto:bobs@sagehill.net]
Sent: 18 February 2007 06:44
To: Hinrich Aue; docbook-apps@lists.oasis-open.org
Subject: Re: [docbook-apps] intrinsic size of images

I found the problem by validating a sample file with the attributes you were trying to use.  The description in my book has a typo.  Where it says contentheight, the attribute name is actually contentdepth in DocBook.  When I validated, it pointed out that I had an invalid attribute. 
If you are using FOP 0.93, then it works with the right attribute name.  If you are using FOP 0.20.5, it is a known problem that it does not handle image scaling correctly.
Bob Stayton
Sagehill Enterprises
DocBook Consulting
----- Original Message -----
Sent: Friday, February 16, 2007 2:16 AM
Subject: AW: [docbook-apps] intrinsic size of images

Hello again,


but I was not specific enough.

I'm trying to get the exact behaviour described at



> 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 contentheight="100%" attributes.


I tried nearly every combination of





But it does not work.

When I use


> scalefit="1", width="100%", and contentheight="100%" attributes.


Then the images are scaled wrong.

But I cannot figure out wich part is wrong

Xsltproc, Fop or my brain? (most likely my brain, I'm stuck)


What works for me now is:


Use no attributes for small images - works fine

Use width=100% attributes for images too big for the pdf page - images are scaled to the right size.





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