[Rd] Sweave, cairo_pdf, xetex, CJK (Re: Sweave, cairo_pdf, CJK, ghostscript)

[Simon Urbanek]

On Oct 31, 2011, at 5:56 PM, Hin-Tak Leung wrote:

> I am still doing some cosmetic things (adding annotations with some of the really minority languages in Sichuan), but here are a few misc tips and quirks so far:
> 
> - cairo_pdf() behaves differently via "R CMD Sweave <file>" vs Sweave("file") within R. The former produces a lot of warnings about not being able to determine strwidth and have to substitute. Probably understandable, but still annoying.
> 
> - It generates pdf 1.5 - when used in combination with xetex, - which uses xdvipdfmx for pdf generation, and xdvipdfmx has the rather disturbing behavior of *silently* *skipping* included pdf's that's higher than the default (instead of do it with warning like pdfTeX) so no graphics will be included, unless xetex is run with -output-driver="xdvipdfmx -V 5"... to declare to output pdf 1.5 .
> 
> - xetex needs noae in \usepackage{SWeave}. FWIW, Werner Lemberg's CJK (the LaTeX package) can work without declaring noae, so that's my preferred choice at the moment, although I have got both of them working, for doing Chinese in a LaTeX document.
> 
> I think some of these information should go into the man page of cairo_pdf()...
> 

Well, I don't see how most of the above is in any way relevant. What PDF gets generated really depends on the cairo version you are using, not on R. Only most recent versions of Cairo (1.10.x) switched the format to PDF-1.5 and added format restriction functions, they are not available in general. In addition, PDF-1.5 is 8 years old, so whatever tools can't deal with it are seriously out of date.

Cheers,
Simon



> --- On Fri, 28/10/11, Hin-Tak Leung <hintak_leung at yahoo.co.uk> wrote:
> 
>> Reading ?RWeaveLatex more carefully,
>> I worked out that the outcome I want could be achieved
>> without patching R, by having this towards the beginning:
>> 
>> <<custom=hide>>=
>>   cairo <- function(name, width, height, ...)
>>   grDevices::cairo_pdf(file = paste(name, "pdf", sep =
>> "."),
>>                
>>        width = width, height =
>> height)
>> @
>> 
>> Then declaring grdevice= like this:
>> 
>> <<another1,fig=TRUE,pdf=FALSE,grdevice=cairo,eval=TRUE,width=6,height=3>>=
>> grid.text("\u4F60\u597D", y=2/3,
>> gp=gpar(fontfamily="CNS1"))
>> @
>> 
>> So all is well. is there any chance of either updating
>> ?RWeaveLatex with this actual use-case example, or make it
>> easier with the attached patch (and updated version of what
>> I did, just adding the corresponding documentation)? I
>> thought there might be a a use for cairo_ps() as well, but
>> then most people who can do latex could do pdflatex,
>> especially those who has cairo installed.
>> 
>> FWIW, besides Chinese, I am doing Tibetan and Arabic as
>> well - needed/wanted those two for Sichuan (south-western
>> China) and Ningxia (northern western, just south of
>> Mongolia).
>> 
>> --- On Sun, 23/10/11, Hin-Tak Leung <htl10 at users.sourceforge.net>
>> wrote:
>> 
>>> --- On Sat, 22/10/11, Prof Brian
>>> Ripley <ripley at stats.ox.ac.uk>
>>> wrote:
>>> 
>>>> On Sat, 22 Oct 2011, Duncan Murdoch
>>>> wrote:
>>>> 
>>>>> On 11-10-21 8:57 PM, Hin-Tak Leung wrote:
>>>>>> I have had some fun in the last few
>> days
>>> trying to
>>>> put together an annotated map of China with R
>> and
>>> some
>>>> public GIS data:
>>>>>> 
>>>>>> http://sourceforge.net/projects/outmodedbonsai/files/snpMatrix%20next/1.17.7.11/China_Choropleth_Maps.pdf/download
>>>>>> 
>>>>>> It is done, and rather nice... there are
>> a
>>> few
>>>> issues:
>>>>>> 
>>>>>> - the default pdf() device cannot do
>> CJK
>>> with
>>>> embedded fonts - and cairo_pdf() is not hooked up
>> to
>>> Sweave
>>>> yet. I have had a quick look, and it does not
>> look
>>> too
>>>> complicated, other than the fact that cairo_pdf()
>> is
>>>> mutually exclusive with pdf(); and the jpeg/png
>> are
>>> new to
>>>> 2.13 so it is probably just nobody has gotten
>> round to
>>> it.
>>>> (and cairo_pdf() also behaves differently with
>> the
>>> onefile
>>>> option). I guess I am almost saying I might get
>> my
>>> hand
>>>> dirty or help somebody else who wants to. So it
>> is
>>> probably
>>>> best to start some discussion.
>>>>> 
>>>>> It is not hard to write your own device
>>> functions,
>>>> especially in 2.14.0.  See rgl::rgl.Sweave for
>> an
>>>> example.
>>>> 
>>>> And guess what the example in the Sweave manual
>>> uses? 
>>>> cairo_pdf() ...
>>> 
>>> I don't want a new device - I just wanted cairo_pdf()
>> to be
>>> hooked up to Sweave as an alternative to the default
>> pdf().
>>> See my later post with the patch against  R trunk
>> and
>>> the worked examples.
>>> 
>>> It looks like cairo_pdf() is just using my current
>>> fontconfig settings.
>>> 
>>> 
> 
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