[Rd] grid.cap() requires more time?

[baptiste auguie]

I just figured out what the strange "noise" consisted of in the
captured output of my previous example, and this is another source of
curiosity for me,

quartz(width=0.1, height=0.1)
gg <- grid.cap()
dev.new()
grid.raster(gg)

Should grid.cap() really capture the resizing handle of the quartz() window?

Best regards,

baptiste

On 17 April 2010 12:34, baptiste auguie <baptiste.auguie at googlemail.com> wrote:
> Dear all,
>
> I am puzzled by the following behavior of the new grid.cap() function,
> which appears to run out of time when capturing the output of a
> graphic. It works fine if I introduce a Sys.sleep(1) before executing
> more code,
>
> library(grid)
>
> quartz()
> grid.circle(gp=gpar(fill="black"))
> gg <- grid.cap()
> dev.new()
> grid.raster(gg) ## completely blank
> gg[gg!="white"] ## indeed
>
> quartz()
> grid.circle(gp=gpar(fill="black"))
> Sys.sleep(1)
> gg <- grid.cap()
> dev.new()
> grid.raster(gg) ## OK
> gg[gg!="white"]
>
> I tried to see if the problem was limited to the quartz() device but
> for some reason the x11() device is not working for me in this R
> version,
>
> capabilities(what = NULL)
>    jpeg      png     tiff    tcltk      X11     aqua http/ftp
> sockets   libxml     fifo   cledit    iconv      NLS  profmem    cairo
>    TRUE     TRUE     TRUE     TRUE    FALSE     TRUE     TRUE
> TRUE     TRUE     TRUE     TRUE     TRUE     TRUE     TRUE     TRUE
> Warning message:
> In doTryCatch(return(expr), name, parentenv, handler) :
>  unable to load shared library
> '/Library/Frameworks/R.framework/Resources/modules/i386/R_X11.so':
>  dlopen(/Library/Frameworks/R.framework/Resources/modules/i386/R_X11.so,
> 6): Library not loaded: /usr/X11/lib/libpng12.0.dylib
>  Referenced from:
> /Library/Frameworks/R.framework/Resources/modules/i386/R_X11.so
>  Reason: Incompatible library version: R_X11.so requires version
> 42.0.0 or later, but libpng12.0.dylib provides version 36.0.0
>
> sessionInfo()
> R version 2.11.0 RC (2010-04-16 r51754)
> i386-apple-darwin9.8.0
>
> locale:
> [1] en_GB.UTF-8/en_GB.UTF-8/C/C/en_GB.UTF-8/en_GB.UTF-8
>
> attached base packages:
> [1] grid      stats     graphics  grDevices utils     datasets
> methods   base
>
> loaded via a namespace (and not attached):
> [1] tools_2.11.0
>
> I would appreciate if someone could confirm this behavior. Pointers to
> a fix for the x11() device on my machine are also welcome!
>
> Best regards,
>
> baptiste
>