Re: [xsl] Re: [FO] Background image on whole page

["G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>]

At 2008-01-10 11:34 +0000, Vincent Hennebert wrote:
> >> Each region can have its own background, so you can use
> >> background-image= on <region-body>.
> >>
> >> To get "the whole page" you will need to have the body region extend
> >> to the page dimensions, which is not really desirable for top and
> >> bottom margins.
> >
> > Yes, I noticed.
> >
> >> An alternative is to parcel out a whole page background into bits
> >> that are set as the backgrounds of the respective perimeter regions
> >> and body region.
> >
> > <sigh> I was hoping you wouldn't say that. Oh well. I guess I will chalk
> > that up as something else XSLFO can't do.
>
> Well you can also use an absolutely positioned block-container with
> a background-image; for example:

Considering section 4.9.6 of the specification, I'm not confident 
this is guaranteed to work as desired by the original poster.

>       <fo:page-sequence master-reference="page">
>         <fo:flow flow-name="xsl-region-body">
>           <fo:block-container absolute-position="absolute"
>             top="-2cm" left="-3cm" width="21cm" height="29.7cm"
>             background-image="path/to/the/image.png">
>             <fo:block/>
>           </fo:block-container>

Perhaps adding z-index="-1" to the above will change the stacking 
layer sufficiently that the following blocks are not in conflict ... 
but your example of putting this a the start of the flow means that 
the background image is only going to be on the first page and not on 
every page.

If you then make the decision to move the specification of the 
absolutely-positioned block container to one of the perimeter areas 
and static content, so that it appears on every page, there may still 
be a problem:  someone on the committee told me that there is no 
guarantee that the unspecified z-index of a perimeter region is less 
than the unspecified z-index of the body region.

Perhaps a combination of the block-container, in a perimeter region, 
with a lower z-index than the content of the body region (which 
7.30.18 implies is zero) would do the trick.  I'd appreciate it if 
someone on the committee would comment on this.

. . . . . . . . . . . . . . . Ken

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