[XeTeX] How does xetex handle non-native image files suchas eps?

[Yuan Qi]

Ulrike Fischer <news2 at ...> writes:

> It is -- like with other TeX-engines -- always possible to call an
> external application during compilation which does whatever you want
> when write18 (--shell-escape) is enabled. 
> 
> When -shell-escape is not enabled, xetex needs either to be able to open
> the graphic file and get the bounding box ("native images") or needs a
> separate bounding box file. In any case: xetex needs the size of the
> graphic during compilation to decide about the place it should reserve
> for the graphic.

What you are saying is that DeclareGraphisRule will not require boundingbox files
if the conversion command can convert it to a native image format.