On Fri, 14 Sep 2012, Troy Henderson wrote:

I put together this little utility for converting a color EPS/PDF/SVG to


Selecting "invert" swaps colors from white to black and black to white.
So, using a black/white graphic on a transparent background should
transform it to a white/black graphic on a transparent background.

Testing is certainly necessary.

Interesting. At some stage I might revive the webfilter branch of the filler module so that such services can be accessed from within ConTeXt.

See the following post for details: http://randomdeterminism.wordpress.com/2010/08/12/using-filters-outside-the-box/

In case anyone is interested, this blog post was talking about code available at


At some stage I decided to delete these features from the filter module and move it to a separate module. The code is available at


but I haven't used it for about 2 years, and given all the changes in the internal namespace, I doubt it will run without modifications. Nonetheless, the idea is that a user can use such services using:

                 ... some other options ....

and then use


This will call the web-service and cache the result.

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