[Rd] invalid graphics state using dev.print (fwd)

[Paul Murrell]

Hi


Martin Maechler wrote:
>>>>>>"Paul" == Paul Roebuck <roebuck at mdanderson.org>
>>>>>>    on Wed, 8 Feb 2006 15:33:11 -0600 (CST) writes:
> 
> 
>     Paul> On Mon, 6 Feb 2006 18:12, Simon Urbanek wrote:
>     >> On Feb 6, 2006, at 5:24 PM, Paul Roebuck wrote:
>     >> 
>     >>> Tried on R-Sig-Mac with no responses, but I need some kind
>     >>> of answer.
>     >>> [...]
>     >>> Does the following work on your system?
>     >> 
>     >> Interesting, no, it doesn't either. For png and pdf I use
>     >> Quartz + quartz.save (it produces much nicer results) so
>     >> I didn't really notice, but you're right. First I thought
>     >> those graphics state issues are specific to the Quartz
>     >> device, but you have proven that it's not. It's in fact
>     >> not even Mac-specific - I have just reproduced it on a
>     >> Linux box - that's why I'm moving this to R-devel.
> 
>     Paul> It's been several workdays now with no responses. Could
>     Paul> someone try the last three lines of code and see if they
>     Paul> get the following error message?
> 
>     >> x11()
>     >> plot(rnorm(10))
>     >> dev.print(png)
> 
>     Paul> Error in dev.copy(device = function (filename = "Rplot%03d.png", width =
>     Paul> 480,  :
>     Paul> invalid graphics state
> 
>     >> traceback()
>     Paul> 6: dev.copy(device = function (filename = "Rplot%03d.png", width = 480,
>     Paul> height = 480, pointsize = 12, gamma = 1, colortype =
>     Paul> getOption("X11colortype"),
>     Paul> maxcubesize = 256, bg = "white", fonts = getOption("X11fonts"),
>     Paul> res = NA)
>     Paul> .Internal(X11(paste("png::", filename, sep = ""), width, height,
>     Paul> pointsize, gamma, colortype, maxcubesize, bg, bg, fonts,
>     Paul> res)), width = 6.98715785526809, height = 6.99452568428947)
>     Paul> 5: eval(expr, envir, enclos)
>     Paul> 4: eval(expr, p)
>     Paul> 3: eval.parent(oc)
>     Paul> 2: dev.off(eval.parent(oc))
>     Paul> 1: dev.print(png)
> 
>     Paul> I noticed it on OS X, and Simon on Linux. 
> 
> Yes, I can confim getting the same.
> Just on Linux though (as Simon)
> 
> I'd say this should make a ``nice little''  bug.report() 
> 
> Interestingly, replacing
> 
>     dev.print(png)
> 
> by  dev.copy(png) ; dev.off()  
> 
> which is about equivalent,  *does* work and so is a workaround
> to your problem.


I think the problem is that the width and height of the PNG device is 
being taken (without regard for units) from the X11 device.  So 
approximately 7 inches square screen window gets drawn into 
approximately 7 *pixel* square PNG file and (understandably) R complains 
that there is not enough room for the plot.  Another workaround is 
something like ...

dev.print(png, width=480, height=480)

... and a fix requires making dev.print() smarter so that it figures out 
that it needs to convert width/height from inches to pixels.

Paul


>     Paul> Other platforms?  WFM?
> 
>     Paul> TIA
> 
>     >> version
>     Paul> _
>     Paul> platform powerpc-apple-darwin7.9.0
>     Paul> arch     powerpc
>     Paul> os       darwin7.9.0
>     Paul> system   powerpc, darwin7.9.0
>     Paul> status   Patched
>     Paul> major    2
>     Paul> minor    2.1
>     Paul> year     2006
>     Paul> month    02
>     Paul> day      01
>     Paul> svn rev  37245
>     Paul> language R
> 
>     Paul> ----------------------------------------------------------
>     Paul> SIGSIG -- signature too long (core dumped)
> 
> ______________________________________________
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> https://stat.ethz.ch/mailman/listinfo/r-devel

-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x85392
paul at stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/