Cairo on windows

[Yves Moisan]

Hi All, I just installed Cairo on R 2.5.1 on windows XP. My hope was to get to see the transparency output e.g. ggplot2 - stat_smooth, which I finally managed to do. However, I find the Cairo device, which I access either through CairoWin() or Cairo(type="win"), is pretty shaky in a number of respects : - whatever portion of the Cairo device that is covered by the R command window does not get drawn. I noticed changing the size of the Cairo window by dragging one of its corners with the mouse does refresh the whole window sometimes - a simple plot or qplot command works, e.g. qplot(x=kg.hab,y=Cout.ton, data=ech2). When one starts to add xlab, ylab and main then things start getting shaky to the point the display becomes blank. At that point, even reverting back to a simple plotting command that worked 5 seconds ago won't bring back the display. One has to dev.off() and start again. Besides the interactive windows display, I also wanted to use Cairo's PNG support so I went and tried one of my

png(filename = ...) 

commands with

CairoPNG(filename = ...) 

and the output was also blank. Are there additional steps besides a package install of Cairo I have to worry about ? TIA, Yves Moisan

[hadley]

You could also try the cairoDevice package, which should definitely
work with the gtk libraries that you probably have from installing
GGobi.

Hadley

On 9/27/07, Yves Moisan <ymoisan@...> wrote:

>
> Hi All,
>
> I just installed Cairo on R 2.5.1 on windows XP.  My hope was to get to see
> the transparency output e.g.  http://had.co.nz/ggplot2/stat_smooth.html
> ggplot2 - stat_smooth , which I finally managed to do.  However, I find the
> Cairo device, which I access either through CairoWin() or Cairo(type="win"),
> is pretty shaky in a number of respects :
>
> - whatever portion of the Cairo device that is covered by the R command
> window does not get drawn.  I noticed changing the size of the Cairo window
> by dragging one of its corners with the mouse does refresh the whole window
> sometimes
>
> - a simple plot or qplot command works, e.g. qplot(x=kg.hab,y=Cout.ton,
> data=ech2).  When one starts to add xlab, ylab and main then things start
> getting shaky to the point the display becomes blank.  At that point, even
> reverting back to a simple plotting command that worked 5 seconds ago won't
> bring back the display.  One has to dev.off() and start again.
>
> Besides the interactive windows display, I also wanted to use Cairo's PNG
> support so I went and tried one of my
> png(filename = ...)
>  commands with
> CairoPNG(filename = ...)
>  and the output was also blank.
>
> Are there additional steps besides a package install of Cairo I have to
> worry about ?
>
> TIA,
>
> Yves Moisan
> --
> View this message in context: http://www.nabble.com/Cairo-on-windows-tf4529124.html#a12923700
> Sent from the R help mailing list archive at Nabble.com.
>
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>
> ______________________________________________
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>

--
http://had.co.nz/

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[Yves Moisan]

> You could also try the cairoDevice package, which should definitely
> work with the gtk libraries that you probably have from installing
> GGobi.

Hi Hadley,

I tried that also before posting on R-help :

> library(cairoDevice)
Error in dyn.load(x, as.logical(local), as.logical(now)) :
        impossible de charger la bibliothèque partagée 'C:/PROGRA~1/R/R-25~1.1/library/cairoDevice/libs/cairoDevice.dll':
  LoadLibrary failure:  La procédure spécifiée est introuvable.


Erreur : le chargement du package / espace de noms a échoué pour 'cairoDevice'

Translation : impossible to load shared library 'C:/PROGRA~1/R/R-25~1.1/library/cairoDevice/libs/cairoDevice.dll'

The library *is* at C:/Program Files/R/R-2.5.1/library/cairoDevice/libs so I'm wondering if the path mentioned in the error log is where 'library' is looking or if that path gets expanded (e.g. "PROGRA~1" becomes "Program Files").  I looked at library to see if I can supply it with a hard path where to find the dll but playing with libpath and lib.loc won't help.  Is that a matter of Cairo and cairoDevice not installing properly on Windows ?

TIA,

Yves

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[Prof Brian Ripley]

On Thu, 27 Sep 2007, Moisan Yves wrote:

>> You could also try the cairoDevice package, which should definitely
>> work with the gtk libraries that you probably have from installing
>> GGobi.
>
> Hi Hadley,
>
> I tried that also before posting on R-help :
>
>> library(cairoDevice)
> Error in dyn.load(x, as.logical(local), as.logical(now)) :
>        impossible de charger la bibliothèque partagée 'C:/PROGRA~1/R/R-25~1.1/library/cairoDevice/libs/cairoDevice.dll':
>  LoadLibrary failure:  La procédure spécifiée est introuvable.
>
>
> Erreur : le chargement du package / espace de noms a échoué pour
> 'cairoDevice'
>
> Translation : impossible to load shared library
> 'C:/PROGRA~1/R/R-25~1.1/library/cairoDevice/libs/cairoDevice.dll'
>
> The library *is* at C:/Program Files/R/R-2.5.1/library/cairoDevice/libs
> so I'm wondering if the path mentioned in the error log is where
> 'library' is looking or if that path gets expanded (e.g. "PROGRA~1"
> becomes "Program Files").  I looked at library to see if I can supply it
> with a hard path where to find the dll but playing with libpath and
> lib.loc won't help.  Is that a matter of Cairo and cairoDevice not
> installing properly on Windows ?

The message means that the DLL exists but that there is a problem loading
it.  That usually means that a dependent DLL is not on the path or not
recent enough, and under XP you usually get a message box to that effect
(Vista 64 seems to tell you a lot less by default).

Now, Cairo ships with libcairo-2.dll but does not put it on the path,
whereas cairoDevice needs more, including libpango and libpangocairo.  So
you will need to install a Windows version of Gtk+ and make sure it is in
your path.  I have a feeling I needed a later version than I was using for
GGobi (I have 2.10.11-1).

My experience is that cairoDevice is a lot slower than Cairo, especially
on Windows, and about equally flaky.  If you see how many layers are
involved with Cairo on Windows you will not be surprised.

If all you need is semi-transparency support I suggest you try R 2.6.0 RC
which supports it in the windows() device.

--
Brian D. Ripley,                  ripley@...
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  [phone] (self)
1 South Parks Road,                     [phone] (PA)
Oxford OX1 3TG, UK                Fax:  [phone]
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[Yves Moisan]

> My experience is that cairoDevice is a lot slower than Cairo,
especially
on Windows, and about equally flaky.  If you see how many layers are
involved with Cairo on Windows you will not be surprised.

Actually, I ended up trying to load deviceCairo simply because it was
the only other package with the string "Cairo" in it besides "Cairo"
itself ;-).  I suspected some interaction between the two libraries
(deviceCairo and Cairo) so that's why I tried to load it hoping it would
solve the flakiness of the CairoWin display.

> If all you need is semi-transparency support I suggest you try R 2.6.0
RC
which supports it in the windows() device.

Thanx for the tip.

Yves Moisan

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[Duncan Murdoch-2]

On 9/27/2007 1:11 PM, Moisan Yves wrote:

>> You could also try the cairoDevice package, which should definitely
>> work with the gtk libraries that you probably have from installing
>> GGobi.
>
> Hi Hadley,
>
> I tried that also before posting on R-help :
>
>> library(cairoDevice)
> Error in dyn.load(x, as.logical(local), as.logical(now)) :
>         impossible de charger la bibliothèque partagée 'C:/PROGRA~1/R/R-25~1.1/library/cairoDevice/libs/cairoDevice.dll':
>   LoadLibrary failure:  La procédure spécifiée est introuvable.
>
>
> Erreur : le chargement du package / espace de noms a échoué pour 'cairoDevice'
>
> Translation : impossible to load shared library 'C:/PROGRA~1/R/R-25~1.1/library/cairoDevice/libs/cairoDevice.dll'
>
> The library *is* at C:/Program Files/R/R-2.5.1/library/cairoDevice/libs so I'm wondering if the path mentioned in the error log is where 'library' is looking or if that path gets expanded (e.g. "PROGRA~1" becomes "Program Files").  I looked at library to see if I can supply it with a hard path where to find the dll but playing with libpath and lib.loc won't help.  Is that a matter of Cairo and cairoDevice not installing properly on Windows ?

Don't you also get a popup, telling you that libgdk-win32-2.0-0.dll was
not found?  I get that; I assume it's supposed to come from gtk, which I
don't currently have installed.  It's unfortunate that the error message
isn't more informative about what the real problem is.  I'll see if
there's a way to improve it.

The dll also requires imports from

libpangocairo-1.0-0.dll
libpango-1.0-0.dll
libgtk-win32-2.0-0.dll
libgobject-2.0-0.dll
libglib-2.0-0.dll
libcairo-2.dll
R.dll

The last one is present on my system; I don't know if the others are all
in gtk.

Duncan Murdoch

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[Yves Moisan]

> Don't you also get a popup, telling you that libgdk-win32-2.0-0.dll
was
not found?  

Duncan,

No such popup.

> The dll also requires imports from

> libpangocairo-1.0-0.dll
> libpango-1.0-0.dll
> libgtk-win32-2.0-0.dll
> libgobject-2.0-0.dll
> libglib-2.0-0.dll
> libcairo-2.dll

I checked that all of the above are on C:\GTK\bin

> R.dll

That's on C:\Program Files\R\R-2.5.1\bin.  My system path has
"%GTK_BASEPATH%\bin" as its very first argument, so I gather I have
everything I need ??  I tried adding explicitly C:\GTK\bin on the path.
I'll see where that leads me next time I fire up R.

Thanx,

Yves Moisan

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[Michael Lawrence]

On 9/27/07, Moisan Yves <ymoisan@...> wrote:

>
> > My experience is that cairoDevice is a lot slower than Cairo,
> especially
> on Windows, and about equally flaky.  If you see how many layers are
> involved with Cairo on Windows you will not be surprised.
>
> Actually, I ended up trying to load deviceCairo simply because it was
> the only other package with the string "Cairo" in it besides "Cairo"
> itself ;-).  I suspected some interaction between the two libraries
> (deviceCairo and Cairo) so that's why I tried to load it hoping it would
> solve the flakiness of the CairoWin display.

My guess is the problem is due to an older version of GTK+. Although
cairoDevice only requires GTK+ 2.8.x (which is probably what you have
installed), the Windows binary of cairoDevice on CRAN is probably built
against GTK+ 2.10.x, just like RGtk2.

I've added a feature to cairoDevice and RGtk2 recently that will
automatically try to install the latest binary of GTK+ on Mac and Windows
when loading the library fails.

That said, I'd really like to merge cairoDevice (specifically the
RGtk2-embedding feature) with the Cairo package. Having one less package to
maintain would be nice.

> If all you need is semi-transparency support I suggest you try R 2.6.0
> RC
> which supports it in the windows() device.
>
> Thanx for the tip.
>
> Yves Moisan
>
> ______________________________________________
> R-help@... 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.
>

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