[xep-support] Making XEP fail when an image cannot be rendered

[Alexei Gagarinov]

Hi David,

> If you have an image in your fo source that is sized such that it does 
> not fit on the page because it is too wide but not too tall, xep renders 
> the image but it extends off the page to the right. If you have an image 
> that is too tall, xep does not render the image, but just leaves a blank 
> space where the image would go. In neither case is there any message in 
> the xep log file. Is it possible to have xep fail if it cannot render an 
> image? Having it quietly create a bad pdf is dangerous. It's preferrable 
> to me to have it fail if something like that goes wrong so I can fix it.

There are 2 approaches for this problem:
1) Design your own application over XEP (using XEP API) and implement a 
custom logger that extends com.renderx.xep.lib.Logger class.

You can filter different errors in the overridden error() method (and 
use System.exit for image's errors, for example).

2) Postprocess -- using any script programming language and an 
appropriate filter -- the error log of the XEP's rendrering (and delete 
the resulting files that contain "bad" output, for example).

Regards,
   Alexey Gagarinov
RenderX



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