On Aug 17, 2014, at 2:35 PM, Paul Murrell wrote: > Hi > > On 08/18/14 07:58, Thomas Levine wrote: >> I want to make my own graphics device am thus looking for >> documentation about graphics devices. >> >> The only thing I've found so far is these directions for >> making graphics devices with the RGraphicsDevice package. >> http://www.omegahat.org/RGraphicsDevice/ > > That is certainly a good way to get something going quickly at least > (I used it just the other day and had something up and running in under an > hour, based on the inst/examples/SVG/svgDev.R example) > >> Could someone point me to any other resources? Or just >> some documentation about how to edit base R? If I don't >> get anything, I'm just going to stare at the grDevices >> section of the R source code (src/library/grDevices/src) >> until I figure out how it works. > > The "canonical" approach is to look at the source code for one of the > built-in devices in the R source code and change it to do what you want > (e.g., src/modules/X11/devX11.c). The file > src/include/R_ext/GraphicsDevice.h has comments describing how the graphics > device should be set up. See the RSvgDevice package for an example of a > device implemented in a package.
It may be useful to look at existing interfaces to an HPGL device in other graphics applications. One such application is xgraph and here is the C code for one implementation: http://xgraph.sourcearchive.com/documentation/12.1-3/hpgl_8c-source.html The other option might be to enlist an external program such as GNUPLOT that has an HPGL output and use it as a driver to which you send an image in a file format that R can produce. -- David. > > Paul > >> In case you're curious, I want to make a graphics device >> that saves the graph in Hewlett-Packard Graphics Language. >> https://en.wikipedia.org/wiki/HPGL >> >> Thanks >> >> Tom >> >> ______________________________________________ >> [email protected] mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > > -- > Dr Paul Murrell > Department of Statistics > The University of Auckland > Private Bag 92019 > Auckland > New Zealand > 64 9 3737599 x85392 > [email protected] > http://www.stat.auckland.ac.nz/~paul/ > > ______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. David Winsemius Alameda, CA, USA ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
