[xep-support] Re: How do I use bleeds

[G. Ken Holman]

At 2014-09-15 10:22 -0500, Daniel Boughton wrote:
>One of our customers sent us background images 
>for there documents which are 8.75" x 11.25" 
>including a 1/8" bleed so that the finished page 
>size is 8.5" x 11". Â I have tried several 
>scenarios and I cannot get the effect I am looking for. Â
>
>If I define my page size as 8.5" x 11" with a 
>1/8" bleed, I also have to use a negative 1/8" 
>horizontal and vertical position on the 
>background to get it centered on the page. Â 
>This is close, but I actually want the contents 
>of the image to "spill" into the bleed area so 
>that when the page is trimmed there is no chance 
>of white space showing up on the borders of the page.
>
>I also tried defining my page size as 8.75" x 
>11.25" and used a negative 1/8" bleed. Â The 
>problem is that XEP trimmed the image in the 
>bleed area so we still run the risk of getting 
>white edges on the document when it gets 
>trimmed. Does anyone know if there is a way to 
>get XEP to leave the image alone in the bleed area?

The following code will work, but it is not 
portable to other XSL-FO processors:

<?xml version="1.0" encoding="US-ASCII"?><!--bleed.fo-->
<root xmlns="http://www.w3.org/1999/XSL/Format"
       font-family="Times" font-size="20pt">

   <layout-master-set>
     <simple-page-master master-name="frame"
                         page-height="11.25in" page-width="8.75in">
       <region-body region-name="frame-body"
                         margin-top=".125in" margin-bottom=".125in"
                         margin-left=".125in" margin-right=".125in"/>
       <region-end region-name="frame-end" extent="8.75in"
                    background-image='url("harbour.jpg")'/>
     </simple-page-master>
   </layout-master-set>

   <page-sequence master-reference="frame">
     <flow flow-name="frame-body">
       <block>This is a test</block>
       <block>This is a test</block>
       <block>This is a test</block>
       <block>This is a test</block>
       <block>This is a test</block>
     </flow>
   </page-sequence>
</root>

It happens that XEP places the perimeter regions 
on the page before placing the body region on the 
page and so the body region shows on top.  Other 
processors place the perimeter regions after the 
body region and so the above approach doesn't 
work because the end region's background obscures the body region.

The specification does not prescribe a Z-level 
for regions and so all processors are conformant 
in this regard regardless of their choice of order.

In the above the body useable area is 8.5x11 
within the margins, but the end region is the 
full page size and thus occupies the edge for the 
bleed.  Note that I chose the end region just 
because it is a region I seldom use and I can 
focus on the before/after regions for 
headers/footers (while accommodating the bleed 
space!) without thinking about their backgrounds.

I hope this helps.

. . . . . . . . . Ken

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