RE: [PATCH] About the :distant-foreground face attribute

[Drew Adams]

> what happens to ordering if we introduce other kinds of
> filters. If we have :adjust-colors and some hypothetical :adjust-foo,
> the order in which the adjustments are made becomes unclear. If we have
> a single list of filters, ordering is natural.

...
> Whether the filtering happens after face composition or face-by-face during
> attribute merging affects the values the filter function sees. 

None of the functions being considered for the attribute value are
filters.  A filter filters.  These are adjusters, transformers,
whatever, but not filters.