[Rd] Hershey Fonts, PNG, SVG, .. graphics formats

[Martin Maechler]

I wonder if we couldn't just use the PNG , SVG, support from the
  GNU plotutils
from which we already have the Hershey scalable vector fonts [-> help(Hershey)]
The new plotutils (July 2000) do support these (and will probably even
better in the future, i.e., we can build on others people free software.

Paul [who built "Hershey" into R], do you think this path is worth pursuing?

>From  http://www.gnu.org/software/plotutils/plotutils.html

>> The GNU plotutils package contains software for both programmers and
>> technical users. Its centerpiece is libplot, a powerful C/C++ function
>> library for exporting 2-D vector graphics in many file formats, both vector
>> and raster. It can also do vector graphics animations.
>> 
>> libplot is device-independent in the sense that its API (application
>> programming interface) does not depend on the type of graphics file to be
>> exported.
>> 
>> Besides libplot, the package contains command-line programs for plotting
>> scientific data. Many of them use libplot to export graphics.
>> 
>> The current version is 2.4.1, released July 2000. It can be installed on
>> GNU/Linux, FreeBSD, and Unix systems.
>> 
>> 
>>        GNU libplot, and applications built on it, can now export graphics
>>        files in SVG format. SVG (Scalable Vector Graphics) is a new,
>>        XML-based format for Web graphics, which is being standardized by
>>        the Graphics Activity of the W3 Consortium.
>> 
>>        PNG format can now be exported too!
>> 
>>        The libplot API has been extended to support the drawing of
>>        Postscript-style compound paths.
>> 
>> The plotutils package comes with a 175-page manual. Here is an older
>> version of the manual.
>> 
>> The package is free software. Its source code is distributed as a gzipped
>> tar file, 3.3 megabytes in size. Here is how you can get it.
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