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From iss...@cocoondev.org
Subject [JIRA] Commented: (FOR-413) PDF: rendering fails when graphics too big - workaround inside
Date Tue, 22 Feb 2005 15:05:32 GMT
The following comment has been added to this issue:

     Author: Johannes Schaefer
    Created: Tue, 22 Feb 2005 9:04 AM
       Body:
See on the FOP mailing-list: 
  http://marc.theaimsgroup.com/?l=fop-user&w=2&r=1&s=infinite+loop&q=b
most notably
  http://marc.theaimsgroup.com/?l=fop-user&m=107875799629370&w=2

These are the FOP bugs for "infinite loop"
   http://makeashorterlink.com/?D28F3288A

Nothing seems to really fit, but maybe the murks.fo helps fixing anyway?!
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View this comment:
  http://issues.cocoondev.org//browse/FOR-413?page=comments#action_12077

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View the issue:
  http://issues.cocoondev.org//browse/FOR-413

Here is an overview of the issue:
---------------------------------------------------------------------
        Key: FOR-413
    Summary: PDF: rendering fails when graphics too big - workaround inside
       Type: Bug

     Status: Unassigned
   Priority: Major

    Project: Forrest
 Components: 
             Core operations
   Versions:
             0.6

   Assignee: 
   Reporter: Olivier Jacques

    Created: Fri, 10 Dec 2004 4:27 AM
    Updated: Tue, 22 Feb 2005 9:04 AM

Description:
When "forresting" a document that has embedded images, the PDF rendering sometimes stops with
this error message:

BROKEN: org.apache.fop.apps.FOPException: No meaningful layout in block after many attempts.
 Infinite loop is assumed.  Processing halted.

I've found that this is caused by images that are too big to fit in the PDF page (took me
some times :) )
I temporary "solved" it by modifying the document2fo.xsl. When I specify the "width" or "height"
attribute to the img, then the value is taken and divided by 2. WARNING: the value has to
be an integer and a "px" (pixels) size.

We should find a way to reduce the size automatically.

$ diff -bruN document2fo.xsl~ document2fo.xsl
--- document2fo.xsl~    2004-12-09 17:51:42.486185200 +0100
+++ document2fo.xsl     2004-12-09 22:03:32.465852800 +0100
@@ -755,10 +755,14 @@
       </xsl:variable>
       <fo:external-graphic src="{$imgpath}">
         <xsl:if test="@height">
-          <xsl:attribute name="height"><xsl:value-of select="@height"/></xsl:attribute>
+          <xsl:variable name="reducedheight"
+                        select="number(@height)" />
+          <xsl:attribute name="height"><xsl:value-of select="concat(number($reducedheight)
div 2,'px')"/></xsl:attribute>
         </xsl:if>
         <xsl:if test="@width">
-          <xsl:attribute name="width"><xsl:value-of select="@width"/></xsl:attribute>
+          <xsl:variable name="reducedwidth"
+                        select="number(@width)" />
+          <xsl:attribute name="width"><xsl:value-of select="concat(number($reducedwidth)
div 2,'px')"/></xsl:attribute>
         </xsl:if>
       </fo:external-graphic>
       <!-- alt text -->



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