Peter: Did you write a preprocessor in cocoon? Where can i find more info on
that?
Meanwhile i tried another approach:
<xsl:variable name="image-base64" select=".//IMAGE"/>
<fo:external-graphic
src="url('data:image/gif;base64,{$image-base64}')"
height="3cm" width="3cm" />
But now i get an error in html instead of an pdf file:
java.lang.NullPointerException:
Cocoon stacktrace[hide]
java.lang.NullPointerException cocoon://fop_post/xsl - 4:14
Exception in StreamGenerator.generate() cocoon://fop_post/xsl - 4:14
[TransformerException]
context://fop_post/sitemap.xmap - 11:32 <map:serialize type="xml">
context://fop_post/sitemap.xmap - 7:33 <map:generate type="stream">
context://fop_post/sitemap.xmap - 44:37 <map:serialize type="fo2pdf">
context://fop_post/sitemap.xmap - 43:42 <map:transform>
context://fop_post/sitemap.xmap - 32:38 <map:generate>
context://sitemap.xmap - 1034:92 <map:mount>
Maybe i should try to show the base64 as text in the pdf first to see if it
still there.
-----Oorspronkelijk bericht-----
Van: Peter Flynn [mailto:[email protected]]
Verzonden: donderdag 18 december 2008 10:24
Aan: [email protected]
Onderwerp: Re: generate pdf from xml with embedded image?
Ken Starks wrote:
[...]
> I did have a few images that were stored also in a database, but I
> would pre-process them in a seperate stage, generating a local copy,
> and populating a table of the database with the path. This was a batch
> process, not an interactive one, and it used python rather than
> cocoon. (Actually, it could do a minor amount of image-processing as
> well, such as cropping, changing contrast, creating thumbnails,
> changing to a different format, Etc and used Image magick as well as
> python).
I do something very similar, taking in Word XML documents. The
preprocessor extracts any encoded image data, converts them back to
image format, creates thumbnails and web-res versions, and adds details
of them to an XML file in their directory, rather than using a database.
The XSL[T] processes then reference them externally as images, which is
probably faster than doing database extraction and image conversion in
real time.
> I suppose it depends on the amount of storage you have, and how
> important it is to you to store your images on a database.
In this case there are typically only a handful of images, so a database
would be overkill: YMMV.
///Peter
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