[Rd] PGF Device
murdoch at stats.uwo.ca
Wed Jan 31 15:12:09 CET 2007
On 1/31/2007 8:49 AM, Prof Brian Ripley wrote:
> On Wed, 31 Jan 2007, Duncan Murdoch wrote:
>> On 1/30/2007 8:50 PM, jtxx000 wrote:
>>> Greetings all,
>>> PGF is a package for LaTeX which works with both ps
>>> and pdf output without any nasty hacks like pictex.
>>> Is there any technical reason why there could not be a
>>> PGF graphic device for R? If not, I'm going to try to
>>> throw one together. Any tips for getting started?
>> The existing drivers are in the grDevices package. I would start with
>> one of those (the picTeX driver would probably be most similar) and go
>> from there. Alternatively, start from devNULL.c and fill in the blanks.
> Please don't start from pictex (it is only half implemented, including no
> real font metrics). If you need Type1 fonts, I suggest you start from the
> postscript/PDF driver.
>> Someone else may be able to offer advice about whether you should be
>> targetting this to be your own package, or for inclusion in the R
>> source. In the past it's been impossible to create a driver in a
>> package, and there's been talk about adding enough to the API to allow
>> this, but I don't know whether that's in place yet.
> There are several devices in packages, and this has been possible since at
> least R 1.4.0 (from 2001). There used to be gtkDevice (still on CRAN, but
> old Gtk), GNOMEdevice (never finished) and an SVG driver
> (http://www.darkridge.com/~jake/RSvg/), and there are now cairoDevice on
> CRAN, the quartz device in the R.app front-end, and others.
Yes, I must have been thinking about connections. Just for the record,
is it possible to create a new connection type in a package?
> Paul Murrell used to have a list of known graphics devices, but I was
> unable to locate it quickly.
> I've written several devices, including pdf(), xfig() and versions of
> png() etc. The hard part is getting text and font metrics working: also
> nowadays you need to be prepared to handle UTF-8 text and CJK locales,
> which many graphic systems are not up to speed on (including postscript,
> pdf and latex).
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