Already implemented. :-) I "borrowed" the code from Batik. See the 
"create-diffs"
parameter in the config file (documented in the Javadocs of BatchDiffer)
which allows to switch the generation of diff images on and off.

http://wiki.apache.org/xmlgraphics-fop/VisualTestingFacility

On 02.09.2005 10:01:25 Luca Furini wrote:
> Jeremias Maerki wrote:
> 
> > For those who don't want to run BatchDiffer themselves, I've uploaded a
> > ZIP full of PNGs, one per layout engine test case combined from output
> > from the PDF, PS and Java2D renderers.
> 
> Just an idea ... what about an option to have the output from two 
> renderers and the XOR between the two? It could help noticing small 
> differences, in the order of a few points, that could otherwise pass 
> unnoticed.
> 
> Regards
>      Luca



Jeremias Maerki

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